Bump all dependencies

Reviewed-on: dsprenkels/rushlink#72

.gitignore

@@ -14,8 +14,12 @@
 # Dependency directories (remove the comment below to include it)
 # vendor/
 
-# Generated code from assets using bindata
-bindata.go
-
 # Output binary
 /rushlink
+
+# Any kind of backup files
+*~
+*.bak
+
+# Visual Code local config directory
+.vscode

README.md

@@ -2,12 +2,57 @@
 
 A URL shortener and (maybe) a pastebin server for our #ru community.
 
-## Build instructions
+## Building
 
 - `go get -u github.com/go-bindata/go-bindata/...`
 - `go generate ./...`
 - `go build ./cmd/rushlink`
 
+## Deploying
+
+We recommend running `rushlink` behind a reverse proxy suitable for processing
+HTTP requests, such as `nginx`, or `haproxy`.
+
+## Sample `nginx` config
+
+```
+server {
+    location / {
+        root    /var/www/rushlink;
+        proxy_pass http://127.0.0.1:8000;
+        proxy_set_header Host rushlink.local;
+        proxy_set_header X-Forwarded-For $remote_addr;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_http_version 1.1;
+    }
+}
+```
+
+`rushlink` automatically detects whether `http` or `https` is used when
+`X-Forwarded-Proto` is correctly set. Otherwise, pass `-root_url
+https://rushlink.local` to the binary (e.g. in the `systemd` unit file).
+
+## Sample `systemd` unit file
+
+As of 1fe9553cc9, `rushlink` expects its database and file store configuration
+in environment variables.
+
+```
+[Install]
+WantedBy=nginx.service
+
+[Service]
+Type=simple
+User=rushlink
+Group=nogroup
+Environment=RUSHLINK_DATABASE_DRIVER=sqlite RUSHLINK_DATABASE_PATH=/var/lib/rushlink/rushlink.sqlite3 RUSHLINK_FILE_STORE_PATH=/var/lib/rushlink/filestore/
+ExecStart=/var/lib/rushlink/rushlink -root_url https://rushlink.local
+```
+
+---
+
+# Background
+
 ## Libraries
 
 Use standard-Go-libraries if the job can be done with those. As of now, these
@@ -24,10 +69,16 @@ are the exceptions:
 
 ## Database
 
-We will be using [`go.etcd.io/bbolt`]. This file should be the *only* file
+Before 1fe9553cc9 we used [`go.etcd.io/bbolt`]. This file should be the *only* file
 apart from our monolithic binary. All settings and keys should go in here.
 Any read-only data resides in the binary file (possibly compressed).
 
+Now, we use Gorm and support SQLite and PostgreSQL as backends.
+
+We provide a migration binary in `cmd/rushlink-migrate-db/`. In environment
+variables, the destination database is configured, and the binary itself
+expects a few flags. Refer to the source for the exact flags.
+
 [`go.etcd.io/bbolt`]: `go.etcd.io/bbolt`
 
 ## Namespacing
@@ -105,17 +156,3 @@ header that the client sends. We can still wrap the plain-text page in a single
 We will try as hard as possible to not store any data about our users, and will
 only provide any data when we have the legal obligation to do so.
 
-## Sample `nginx` config
-
-```
-server {
-    location / {
-        root    /var/www/rushlink;
-        proxy_pass http://127.0.0.1:8000;
-        proxy_set_header Host rushlink.local;
-        proxy_set_header X-Forwarded-For $remote_addr;
-        proxy_http_version 1.1;
-    }
-}
-```
-

assets/css/main.css

@@ -0,0 +1,34 @@
+body {
+    font-family: monospace;
+}
+
+#dropZone {
+    background-color: rgba(0, 0, 0.2, 0.75);
+    color: white;
+    font-size: 60px;
+    font-weight: bold;
+    height: 100%;         
+    left: 0; 
+    padding: 1em;
+    position: fixed;
+    top: 0;
+    transition: visibility 175ms, opacity 175ms;
+    width: 100%;
+    z-index: 999;               
+}
+
+pre {
+    padding-left: 4ex; /* approx 4 monospaced spaces */
+}
+
+.success {
+    color: #008000;
+}
+
+.fail {
+    color: #800000;
+}
+
+.hidden {
+    display: none;
+}

assets/js/copyclipboard.js

@@ -0,0 +1,51 @@
+"use strict";
+
+const COPY_TO_CLIPBOARD_CONTAINER_ID = "copyToClipboardContainer";
+const COPY_TO_CLIPBOARD_STATUS_ID = "copyToClipboardStatus";
+let copyToClipboardCtr = 0;
+
+function copyToClipboardSuccess() {
+    let statusElem = document.getElementById(COPY_TO_CLIPBOARD_STATUS_ID);
+    statusElem.innerText = "URL copied!";
+    statusElem.classList.remove("fail");
+    statusElem.classList.add("success");
+}
+
+function copyToClipboardFail(cause) {
+    let statusElem = document.getElementById(COPY_TO_CLIPBOARD_STATUS_ID);
+    if (!cause) cause = "unknown error";
+    let msg = "copy failed: " + cause;
+    console.log(msg);
+    statusElem.innerText = msg;
+    statusElem.classList.remove("success");
+    statusElem.classList.add("fail");
+}
+
+function copyToClipboard(url) {
+    let copyEventIdx = ++copyToClipboardCtr;
+
+    if (!window.navigator.clipboard) {
+        copyToClipboardFail("could not access clipboard");
+        return;
+    }
+    window.navigator.clipboard.writeText(url).then(() => {
+        if (copyToClipboardCtr !== copyEventIdx) return;
+        copyToClipboardSuccess();
+    }, () => {
+        if (copyToClipboardCtr !== copyEventIdx) return;
+        copyToClipboardFail();
+    });
+}
+
+(function () {
+    if (!window.navigator.clipboard) {
+        let msg = "cannot access clipboard";
+        if (window.location.protocol !== "https:") {
+            msg += ": website not using https"
+        }
+        console.error(msg);
+    } else {
+        let container = document.getElementById(COPY_TO_CLIPBOARD_CONTAINER_ID);
+        container.classList.remove("hidden");
+    }
+})();

assets/js/dragdrop.js

@@ -0,0 +1,48 @@
+"use strict";
+
+window.addEventListener('DOMContentLoaded', (event) => {
+    // The implementation of this drag-drop logic is largely based on the
+    // answer described in <https://stackoverflow.com/a/28226022/5207081>.
+    //
+    // The gist is this: every time the drag enters a new DOM object, it will
+    // fire a new 'dragenter' event on that element.  That is a pain, because
+    // we do not know which element will be the last to receive a dragleave
+    // event, in case the user aborts the process.
+    //
+    // Therefore, we use an Ugly Hack™.  There will be an element with id
+    // 'dropZone', which blocks the complete page.  When a 'dragenter' event
+    // is received on any DOM element, we will unhide this modal page-blocker.
+    // This will guarantee us that the next 'enter' event will be received on
+    // this page-block element.  This event we shall ignore.
+    //
+    // Then, whenever the user stop their drag action, we will receive the
+    // 'dragleave' on the '#dropZone' element.  Now we know when exactly
+    // a drag action is cancelled (and we will hide the modal element
+    // accordingly).
+
+    let dropZone = document.getElementById("dropZone");
+    window.addEventListener("dragenter", (event) => {
+        // User starts a drag action
+        dropZone.style.visibility = "";
+        dropZone.style.opacity = 1;
+    });
+
+    dropZone.addEventListener("drop", (event) => {
+        // User drops a file
+        event.preventDefault();
+        document.getElementById("fileUploadField").files = event.dataTransfer.files;
+        document.getElementById("fileUploadForm").submit();
+    });
+
+    dropZone.addEventListener("dragleave", (event) => {
+        // User cancels drag action
+        dropZone.style.visibility = "hidden";
+        dropZone.style.opacity = 0;
+    });
+
+    window.addEventListener("dragover", (event) => {
+        // Prevent the browser from opening the file, because of a drop event
+        // on the window.  (<https://stackoverflow.com/a/6756680/5207081>)
+        event.preventDefault();
+    });
+});

assets/templates/html/base.html.tmpl

@@ -2,7 +2,9 @@
 <html>
     <head>
         <meta charset="utf-8">
-        <title>{{block "title" .}}rushlink{{end}}</title>{{block "head-append" .}}{{end}}
+        <title>{{block "title" .}}rushlink{{end}}</title>
+        <link rel="stylesheet" type="text/css" href="/css/main.css" />
+        {{block "head-append" .}}{{end -}}
     </head>
     <body>
         {{block "body" .}}

assets/templates/html/deletePasteSuccess.html.tmpl

@@ -1,3 +0,0 @@
-{{define "title"}}
-Success - rushlink
-{{end}}

assets/templates/html/index.html.tmpl

@@ -1,20 +1,47 @@
-{{define "body"}}
+{{define "head-append"}}
-<pre>
+<script type="text/javascript" src="/js/dragdrop.js" defer></script>
-#RU URL SHORTENER
+{{end}}
-=================
 
-Based on https://0x0.st/, this site allows you to easily shorten URLs using
+{{define "body"}}
+<div style="visibility:hidden; opacity:0" id="dropZone">File incoming! :D</div>
+<h1>#RU paste-dump</h1>
+
+Based on https://0x0.st/, this site allows you to easily upload files and shorten URLs using
 the command line.
 
-## USAGE
+<h2>Web-API</h2>
+<section>
+    <form id="fileUploadForm" action="/" method="post" enctype="multipart/form-data">
+        <label class="formLabel" for="fileUploadField">Upload a file:</label>
+        <input id="fileUploadField" class="formMain" name="file" type="file" />
+        <input id="fileUploadField" class="formSubmit" type="submit" value="upload!" />
+    </form>
+</section>
+<section>
+    <form id="shortenURLForm" action="/" method="post" enctype="multipart/form-data">
+        <label class="formLabel" for="shortenURLField">Upload a URL:</label>
+        <input id="shortenURLField" class="formMain" name="shorten" type="url" />
+        <input id="shortenURLSubmit" class="formSubmit" type="submit" value="shorten!" />
+    </form>
+</section>
 
-    # Upload a file
+<h2>Command line API</h2>
-    curl -F'file=@yourfile.png' <a href="//{{.Request.Host}}">https://{{.Request.Host}}</a>
+<pre>
+# Upload a file
+curl -F'file=@yourfile.png' <a href="{{.RootURL}}">{{.RootURL}}</a>
 
-    # Shorten a URL
+# Shorten a URL
-    curl -F'shorten=http://example.com/some/long/url' <a href="//{{.Request.Host}}">https://{{.Request.Host}}</a>
+curl -F'shorten=http://example.com/some/long/url' <a href="{{.RootURL}}">{{.RootURL}}</a>
 
-    # Shorten a URL with a token to delete it later
+# The first line of the result will contain the shortened URL.
-    curl -F'shorten=http://example.com/some/long/url' -F'deleteToken=' <a href="//{{.Request.Host}}">https://{{.Request.Host}}</a>
+#
+# In the other lines, you will find other information, including
+# information on how to delete the shortened object.
+
+# Upload output from another process
+figlet Rushlink | curl -F'file=@-' <a href="{{.RootURL}}">{{.RootURL}}</a>
+
+# To upload a file and only extract the shortened URL (i.e. throw away the rest)
+curl -F'file=@yourfile.png' <a href="{{.RootURL}}">{{.RootURL}}</a> | head -n 1
 </pre>
 {{end}}

assets/templates/html/newFileUploadPasteSuccess.html.tmpl

@@ -1,3 +0,0 @@
-{{define "title"}}
-Success - rushlink
-{{end}}

assets/templates/html/newRedirectPasteSuccess.html.tmpl

@@ -1,3 +0,0 @@
-{{define "title"}}
-Success - rushlink
-{{end}}

assets/templates/html/pasteMeta.html.tmpl

@@ -1,3 +1,45 @@
 {{define "title"}}
-'{{.Paste.Key}}' meta info - rushlink
+'{{.Paste.Key}}{{.FileExt}}' metadata - rushlink
-{{end}}
+{{end}}
+
+{{define "head-append"}}
+<script type="text/javascript" src="/js/copyclipboard.js" defer></script>
+{{end}}
+
+{{define "body"}}
+<pre id="copyToClipboardContainer" class="hidden">
+<button onclick="copyToClipboard('{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}')">Copy URL to clipboard</button> <span id="copyToClipboardStatus"></span>
+</pre>
+<pre>
+<a href="{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}">{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}</a>
+---
+{{if and (ne .Paste.State.String "deleted") .CanDeleteBool}}
+with delete token: <a href="{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}?deleteToken={{.Paste.DeleteToken}}">{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}?deleteToken={{.Paste.DeleteToken}}</a>
+{{else -}}
+with delete token: &lt;unknown&gt;
+{{end -}}
+type: {{.Paste.Type}}
+state: {{.Paste.State}}
+{{if .Paste.CreatedAt.IsZero -}}
+created: unknown
+{{else -}}
+created: {{.Paste.CreatedAt}}
+{{end -}}
+{{if .Paste.UpdatedAt.IsZero -}}
+last updated: unknown
+{{else -}}
+last updated: {{.Paste.UpdatedAt}}
+{{end -}}
+{{if .Paste.DeletedAt.Valid -}}
+deleted at: {{.Paste.DeletedAt.Time}}
+{{end -}}
+delete token: {{.CanDeleteString}}
+<form action="delete?deleteToken={{.Paste.DeleteToken}}" method="post">
+<input type="submit" name="delete" value="Delete paste"
+{{- if or (eq .Paste.State.String "deleted") (not .CanDeleteBool) -}}
+disabled
+{{- end -}}
+>
+</form>
+</pre>
+{{end}}

assets/templates/txt/deletePasteSuccess.txt.tmpl

@@ -1 +0,0 @@
-<{{.Request.Host}}/{{.Paste.Key}}> was succesfully deleted

assets/templates/txt/index.txt.tmpl

@@ -6,11 +6,19 @@ the command line.
 
 ## USAGE
 
-    # Upload a file
+# Upload a file
-    curl -F'file=@yourfile.png' https://{{.Request.Host}}
+curl -F'file=@yourfile.png' {{.RootURL}}
 
-    # Shorten a URL
+# Shorten a URL
-    curl -F'shorten=http://example.com/some/long/url' https://{{.Request.Host}}
+curl -F'shorten=http://example.com/some/long/url' {{.RootURL}}
 
-    # Shorten a URL with a token to delete it later
+# The first line of the result will contain the shortened URL.
-    curl -F'shorten=http://example.com/some/long/url' -F'deleteToken=' https://{{.Request.Host}}
+#
+# In the other lines, you will find other information, including
+# information on how to delete the shortened object.
+
+# Upload output from another process
+figlet Rushlink | curl -F'file=@-' {{.RootURL}}
+
+# To upload a file and only extract the shortened URL (i.e. throw away the rest)
+curl -F'file=@yourfile.png' {{.RootURL}} | head -n 1

assets/templates/txt/newFileUploadPasteSuccess.txt.tmpl

@@ -1,5 +0,0 @@
-{{if .Request.PostForm.deleteToken -}}
-https://{{.Request.Host}}/{{.Paste.Key}}?deleteToken={{.Paste.DeleteToken | urlquery}}
-{{else -}}
-https://{{.Request.Host}}/{{.Paste.Key}}
-{{end -}}

assets/templates/txt/newRedirectPasteSuccess.txt.tmpl

@@ -1,5 +0,0 @@
-{{if .Request.PostForm.deleteToken -}}
-https://{{.Request.Host}}/{{.Paste.Key}}?deleteToken={{.Paste.DeleteToken | urlquery}}
-{{else -}}
-https://{{.Request.Host}}/{{.Paste.Key}}
-{{end -}}

assets/templates/txt/pasteMeta.txt.tmpl

@@ -1,17 +1,21 @@
-METADATA on <{{.Request.Host}}/{{.Paste.Key}}>:
+{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}
-
+---
-TYPE: {{.Paste.Type}}
+{{if and (ne .Paste.State.String "deleted") .CanDeleteBool}}
-STATE: {{.Paste.State}}
+with delete token: {{.RootURL}}/{{.Paste.Key}}{{.FileExt}}?deleteToken={{.Paste.DeleteToken}}
-{{if .Paste.TimeCreated.IsZero -}}
-CREATED: undefined
 {{else -}}
-CREATED: {{.Paste.TimeCreated}}
+with delete token: <unknown>
+{{end -}}type: {{.Paste.Type}}
+state: {{.Paste.State}}
+{{if .Paste.CreatedAt.IsZero -}}
+created: unknown
+{{else -}}
+created: {{.Paste.CreatedAt}}
 {{end -}}
-DELETE TOKEN: {{.CanDelete.String}}
+delete token: {{.CanDeleteString}}
 
-{{if and (ne .Paste.State.String "deleted") .CanDelete.Bool}}
+{{if and (ne .Paste.State.String "deleted") .CanDeleteBool}}
 ```
 # To delete this {{.Paste.Type}}, execute:
-curl --request "DELETE" "{{.Request.Host}}/{{.Paste.Key}}?deleteToken={{.Request.URL.Query.Get "deleteToken"}}"
+curl --request "DELETE" "{{.RootURL}}/{{.Paste.Key}}{{.FileExt}}?deleteToken={{.Paste.DeleteToken}}"
 ```
 {{end}}

bindata.go

@@ -0,0 +1,484 @@
+// Code generated for package rushlink by go-bindata DO NOT EDIT. (@generated)
+// sources:
+// assets/css/main.css
+// assets/js/copyclipboard.js
+// assets/js/dragdrop.js
+// assets/templates/html/base.html.tmpl
+// assets/templates/html/error.html.tmpl
+// assets/templates/html/index.html.tmpl
+// assets/templates/html/pasteMeta.html.tmpl
+// assets/templates/txt/base.txt.tmpl
+// assets/templates/txt/error.txt.tmpl
+// assets/templates/txt/index.txt.tmpl
+// assets/templates/txt/pasteMeta.txt.tmpl
+package rushlink
+
+import (
+	"bytes"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+func bindataRead(data []byte, name string) ([]byte, error) {
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		return nil, fmt.Errorf("Read %q: %v", name, err)
+	}
+
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		return nil, fmt.Errorf("Read %q: %v", name, err)
+	}
+	if clErr != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+type asset struct {
+	bytes []byte
+	info  os.FileInfo
+}
+
+type bindataFileInfo struct {
+	name    string
+	size    int64
+	mode    os.FileMode
+	modTime time.Time
+}
+
+// Name return file name
+func (fi bindataFileInfo) Name() string {
+	return fi.name
+}
+
+// Size return file size
+func (fi bindataFileInfo) Size() int64 {
+	return fi.size
+}
+
+// Mode return file mode
+func (fi bindataFileInfo) Mode() os.FileMode {
+	return fi.mode
+}
+
+// Mode return file modify time
+func (fi bindataFileInfo) ModTime() time.Time {
+	return fi.modTime
+}
+
+// IsDir return file whether a directory
+func (fi bindataFileInfo) IsDir() bool {
+	return fi.mode&os.ModeDir != 0
+}
+
+// Sys return file is sys mode
+func (fi bindataFileInfo) Sys() interface{} {
+	return nil
+}
+
+var _cssMainCss = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x5c\x51\xd1\x6e\xc3\x20\x0c\x7c\xcf\x57\x58\xaa\x26\x6d\x55\xd3\xd2\xa9\x5d\x57\xf2\x27\x7b\x23\xc1\x49\xac\x11\x8c\x80\xae\x49\xa7\xfe\xfb\x94\x84\xac\xd3\x10\x02\x7c\x77\x36\x27\xbb\x64\x3d\xc0\x77\x06\x00\x50\xb3\x8d\x79\xad\x3a\x32\x83\x84\x8e\x2d\x07\xa7\x2a\x2c\xb2\x7b\x96\xad\xb4\x67\xf7\xc1\x16\x93\xb4\x54\xd5\x67\xe3\xf9\x62\x75\x5e\xb1\x61\x2f\xc1\x37\xa5\x7a\x16\x1b\x18\xf7\xf6\x75\x3c\x4e\xc7\x97\x62\x12\x27\xc5\xb5\xa5\x88\xc5\xe3\xa7\x40\x37\x94\xf0\x26\x5c\xff\x07\xbc\x22\x35\x6d\x94\x50\xb2\xd1\x33\xdc\x26\x64\x2f\xc4\x53\x01\xcb\x9a\x28\x83\x75\x94\x20\x8a\x39\x72\x4a\x6b\xb2\x8d\x84\x3d\x76\x73\xaa\xe3\x40\x91\xd8\x4a\xa8\xa9\xc7\x54\x2f\xb2\x1b\x73\xe6\xb7\x57\x76\x91\x7c\x51\xa0\x92\x0c\xc5\x01\xf6\xa7\x63\x17\x36\xc0\x4e\x55\xbf\xe1\x9c\x70\x25\x1d\xdb\xe4\x65\x02\x6e\x39\x59\x8d\xbd\x84\xf3\xf9\xfc\x70\x97\x3c\xde\xb3\xcc\xf9\xa5\x65\xc9\x5e\x3e\x9b\x3e\x60\x5f\xc0\x6e\x0d\xca\x39\xcf\x3d\x1c\x1e\xfd\xd6\x30\x5d\x01\xd6\xbb\xb1\xc0\x36\x5c\xaa\x0a\x43\x48\x55\x52\x2f\x57\x42\xbc\x0b\x21\xa6\xd9\x6c\x6b\x45\xe6\x1f\x3d\x92\x0b\xdd\x92\xd6\x68\x93\x40\x53\x70\x46\x0d\x12\x2c\xdb\x69\xb4\x3f\x01\x00\x00\xff\xff\x22\xc0\x9d\x3a\x00\x02\x00\x00")
+
+func cssMainCssBytes() ([]byte, error) {
+	return bindataRead(
+		_cssMainCss,
+		"css/main.css",
+	)
+}
+
+func cssMainCss() (*asset, error) {
+	bytes, err := cssMainCssBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "css/main.css", size: 512, mode: os.FileMode(420), modTime: time.Unix(1590859748, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _jsCopyclipboardJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xb4\x54\x4f\x6b\xe3\x3e\x10\xbd\xfb\x53\x4c\x75\xb2\xc9\x0f\xf3\x3b\xd7\x78\xa1\x4d\xbb\x10\x28\x4d\x69\xdc\xc3\x9e\x82\x2a\x4d\x1c\xb1\xb2\x14\xa4\x71\xd2\xb2\xf8\xbb\x2f\xb2\xe3\xc4\xf9\xcb\xf6\x50\x1f\x12\x12\x8f\xde\xcc\x7b\x6f\x9e\x58\xed\x11\x3c\x39\x25\x88\x65\x51\x24\xac\xf1\x04\xe3\xe9\xcb\xaf\x79\x31\x9d\x8f\x9f\x26\x2f\xf7\xd3\xbb\xd7\x87\xf9\x78\xfa\x5c\xdc\x4d\x9e\x1f\x5f\xe7\x93\x07\xc8\x81\x09\xbb\xfa\x2c\xec\x58\xab\xd5\xbb\xe5\x4e\x8e\xad\x21\xae\x0c\x3a\x96\x5d\x84\x98\x15\x77\xc5\xdb\xec\xfc\xf9\x19\x71\xaa\x3d\xcb\x22\x8d\x04\xc7\xd8\xe4\x20\x87\xff\xb3\x28\x5a\xd4\x46\x90\xb2\xe6\xb8\x62\x56\x0b\x81\xde\xc7\x09\xfc\x89\x00\x00\x02\x88\x6f\x11\x1f\x35\x56\x90\x83\xb4\xa2\xae\xd0\x50\x5a\x22\x85\xbf\xd0\xd0\xfd\xe7\x44\xc6\x57\x86\x4c\xb2\x16\x6a\x0f\x93\x2a\x63\xd0\x15\xf8\x41\x61\xfe\xb7\xd7\xa7\x30\x85\x42\x79\xc3\x4e\x2a\x85\xe6\xde\x3f\x29\x4f\xa9\xc3\xca\xae\x31\x66\x0b\xae\x34\x3b\x85\xdc\x17\x72\x29\x63\xe6\x3b\x1e\xa1\xb0\xb9\xcc\xf6\x27\x57\x3a\x16\xbc\xf6\xf8\x0d\x7c\xd5\x02\xe2\x9b\x2d\x78\xfb\x15\xc8\xd6\xe6\xb7\xb1\x1b\x03\xe8\x9c\x75\x5b\xba\xa1\x67\xe5\xcb\xde\x4b\x08\x0c\x51\xde\x02\x83\x51\x77\xb0\x2b\x0b\xcb\x60\x35\xa6\xda\x96\x71\xe5\xcb\xeb\xaa\x56\xbe\xfc\x07\x2d\x07\x2a\x5d\x97\xb3\x17\xfd\x8a\x96\x71\xed\xf4\x50\xc5\xf0\xfa\x71\x8d\x86\x26\xf2\x03\x72\x18\x8d\x4e\x77\x31\x8b\xf6\x42\x6d\x94\x91\x76\x93\x1a\xbe\x56\x25\x27\xeb\x52\xd1\x17\xf6\xa0\x9d\x06\xa7\xfe\x31\x61\x6b\x2d\xc1\x58\x02\xde\xd2\x81\xdd\xd1\x9e\x58\x78\x1c\x52\xed\x4c\xf7\xbb\x69\x3f\x2f\xb7\x4c\x37\x4e\x11\x06\x29\x5b\x56\x29\x2d\xd1\xc4\x71\x02\xf9\x8f\xc1\x2c\x61\xec\x33\xf9\xba\xc9\xf3\x03\xee\xc9\x41\xe7\x33\x24\x76\x91\xdb\xce\xf6\x1f\x7c\x57\xa7\x56\xae\xbe\x4d\xe7\x66\xbc\xb3\x73\x17\xf9\x2f\xd8\x31\xdc\x5c\x6e\xce\x3a\x90\x1d\xb0\xd8\xc2\x6a\x2b\x78\x68\x9a\xae\x9c\x25\x2b\xac\x6e\xb9\xb0\x25\xd1\xca\xdf\xb2\x61\x87\xf0\x84\x0e\xa3\x1c\xd8\x2d\x6c\xf0\xdd\x2b\xc2\xd6\xeb\xda\x2b\x53\x42\x7b\x84\xed\xca\x9b\x01\xf5\x2e\x2d\x6d\xd0\x06\x79\x69\x00\xb5\xc7\x23\x0e\xa2\xbf\x73\xbf\x14\xf8\xe1\x45\x9e\x0c\x45\xdf\x82\x9d\x09\xdc\x52\x49\x89\xa6\x5f\xcb\x26\x6a\x92\xe0\xc7\xdf\x00\x00\x00\xff\xff\x70\xbd\x7a\x61\x39\x06\x00\x00")
+
+func jsCopyclipboardJsBytes() ([]byte, error) {
+	return bindataRead(
+		_jsCopyclipboardJs,
+		"js/copyclipboard.js",
+	)
+}
+
+func jsCopyclipboardJs() (*asset, error) {
+	bytes, err := jsCopyclipboardJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "js/copyclipboard.js", size: 1593, mode: os.FileMode(420), modTime: time.Unix(1590859748, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _jsDragdropJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x94\x95\xcd\x6e\xdb\x46\x10\xc7\xef\x7e\x8a\x01\x7b\xa0\x08\x28\x94\x22\x20\x8e\x11\xd5\x39\xb4\x4e\xd1\x02\x4d\xd3\x83\x8d\x02\xbd\x0d\x77\x47\xe4\xd4\xab\x5d\x62\x77\x24\x86\x28\x72\xeb\x93\xf4\xd1\xfa\x24\xc5\x2e\x3f\x2c\xb7\xb6\x63\x9f\x04\x91\xf3\xf1\x9b\xff\xfc\x97\x9b\x1d\x02\x41\x10\xcf\x4a\xb2\xed\xd9\x59\xc7\x56\xbb\xae\x44\xad\x3f\x1c\xc9\xca\xcf\x1c\x84\x2c\xf9\x45\x7e\xf5\xe9\xe3\xf7\xce\x4a\x7c\xe6\x50\x93\xce\x97\xb0\xa0\x18\x52\xc0\xe5\x7b\xf8\xf3\x0c\x00\x60\xb5\x82\xeb\x86\x80\xf7\xad\xa1\x3d\x59\x41\x61\x67\xc1\xed\x40\x1a\x0e\xa0\x3d\xd6\xaf\xb4\x77\x2d\x18\x57\xb3\x02\x0e\x60\xd0\xd7\x64\x7a\xa8\x30\x90\x06\x67\x41\x1a\x9a\x2a\xa1\x0d\x1d\x79\xd0\x14\x94\xe7\x8a\x34\xb0\x85\x6f\x1b\x91\x36\xbc\x5b\xad\x82\xa0\xba\x75\x47\xf2\x3b\xe3\xba\x52\xb9\xfd\x0a\x57\x9b\x8b\xcd\xe6\x7c\xbd\xd9\xac\xde\x6c\xd6\x6f\xd7\x17\xaf\xdf\x97\x63\xa9\x53\xb6\x9a\x83\xc4\xce\x91\xe8\x1d\xd0\x91\x7c\x0f\xc2\x7b\x8a\x9d\x13\x21\x90\x15\xf2\x01\x10\x2c\x75\x70\xf5\xe9\x23\xb8\xea\x0f\x52\xb2\x04\x16\xe8\xd8\x98\xa9\xda\x8e\x3d\x8d\x51\x79\x4c\x4c\x79\x39\x24\x4d\x86\x51\x50\x80\x06\x21\x4a\x80\xeb\xf8\x97\x63\xdd\x16\xd9\x2e\xa1\x22\x85\x87\x30\x4f\xdb\x11\x68\x07\xd6\x09\xdc\x5a\xd7\x41\xd7\xb0\x6a\xa6\xec\xd4\x16\xaa\x81\xd1\x60\x10\x10\x07\x9e\x14\xf1\x31\x12\xc4\xe6\x86\xf0\x38\xd7\x4a\x08\xcb\xa8\x97\xc2\x30\x64\x1d\x02\x79\xc0\xca\x79\x09\xe9\x7f\xeb\x9d\xa2\x10\x1e\x50\xc8\xd3\xce\x79\x5a\x46\xa0\xe8\x0c\xb4\x70\x53\x9b\x1e\x7e\x44\x75\xfb\xcf\x5f\x7f\xa7\x41\xc8\xd3\x8c\x84\xf6\x84\x52\x1a\x60\x3d\xd5\xca\xe3\xaa\x7f\x77\x96\xf2\xe5\x38\x4e\x65\x9c\xba\x1d\xfa\x2b\x17\x3d\x22\x04\x2d\xd6\x54\x02\xfc\xd6\x90\x05\xfc\xbf\x90\x53\x31\x0e\xd3\xc0\xc9\x26\x68\xfb\xb4\x9a\xb1\x75\xa2\x4d\x44\x07\xdb\xb0\xa6\xc1\x6f\x7b\xa7\xd1\xa4\x06\xaf\x52\x67\xf2\xe5\xdd\x9c\x1c\x86\x84\xfa\x80\x1e\xad\x50\x9c\x76\x58\x59\xc4\xb3\xf4\x59\x20\xbf\xb7\xd1\x69\xe0\x13\x8c\xa9\x5a\xea\x76\xd7\xe7\xde\xd2\x39\x4c\xf9\x04\xa1\x41\x63\x80\x6b\xeb\x3c\x3d\xa0\xbc\x8d\x3a\x91\x8d\x9e\xbc\xdb\x59\x10\xd7\xc6\x7f\xec\x07\x77\xa2\x8a\x67\xea\x6e\xe0\xc9\x06\x27\x07\x27\x9f\x0d\x91\x8f\x47\x0a\xf2\x6f\xe6\x65\x9c\xd0\xfd\x12\x8d\x46\x93\xe1\xc8\x02\x7d\x46\x25\xa6\x9f\x4f\xe0\x69\xcb\xb8\x02\x85\x56\x91\x31\xa4\x61\x81\x56\xcf\x0c\xa3\xe4\x34\x2a\x3e\x36\x98\xab\x28\xe5\xbc\x66\x5b\x9b\xbe\x28\xcf\xd2\x53\x43\x02\x13\x10\x5c\x82\x76\xea\x90\x90\x6a\x92\x0f\x43\xf2\x77\xfd\x4f\x7a\x91\x4d\x31\x59\xb1\x4d\x79\x8f\x7d\x9c\xb2\xd9\x36\xd9\x03\x5f\xa5\x91\xe3\x66\x90\x13\xe3\x11\xb8\x37\xd9\x1c\x34\xb5\x2b\x83\xf4\x86\xca\x23\x07\xae\xd8\xb0\xf4\x70\x09\x59\xb6\x7d\x2c\xce\xb5\xa8\x86\xa0\xd7\x43\xcc\x97\x62\x3b\xcc\x39\x07\x3e\x44\xec\xda\xaf\xc1\xc6\x98\xc8\xba\x63\x43\xf3\xcb\x94\x50\xb6\x3e\xfd\x5e\xd1\x0e\x0f\x46\x16\xc5\x09\xdc\x63\x62\xc6\x2a\x37\xad\x71\xa8\x7f\x60\x32\x3a\x2b\xca\xf8\x24\xc0\xe5\x58\x52\xa3\xe0\xb5\x47\x1b\x76\xe4\x87\x57\x2f\x2b\xea\xfc\x3e\x2b\xca\x70\xa8\xf6\x3c\x03\x3d\x4f\x89\xd1\xad\x5f\x93\x63\x70\x5f\x78\xf9\xea\x1a\xd6\x9a\xec\x73\x16\xb8\xfe\x0f\xf6\x93\x86\x8b\xd7\xcf\x13\xcc\xbf\x0e\x2b\x4a\x07\xa3\xf2\xae\x8b\x23\xec\xbc\xdb\x83\x6b\xc9\xb2\xad\xd3\x8b\xa8\xdf\x7c\x17\xc4\x9b\x12\x13\xdc\xc9\xc7\x6f\xac\x36\x1e\xe4\x11\x08\x60\xf1\xe4\x55\x78\xfe\xf6\xcd\xf9\xf9\xc5\x7a\xbe\x09\x8b\x67\xd9\x27\x8e\xfd\xa5\xd8\xfe\x1b\x00\x00\xff\xff\xdf\xfa\x50\xb3\x12\x08\x00\x00")
+
+func jsDragdropJsBytes() ([]byte, error) {
+	return bindataRead(
+		_jsDragdropJs,
+		"js/dragdrop.js",
+	)
+}
+
+func jsDragdropJs() (*asset, error) {
+	bytes, err := jsDragdropJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "js/dragdrop.js", size: 2066, mode: os.FileMode(420), modTime: time.Unix(1609421047, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesHtmlBaseHtmlTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x6c\x90\x31\x6f\x84\x30\x0c\x85\xf7\xfb\x15\xae\x77\xc8\xda\x21\xb0\xb4\x9d\x7b\x43\x97\x8e\x39\xf0\x29\xe8\x0c\x87\x12\x9f\x54\x14\xe5\xbf\x57\x38\x55\xc3\x70\x13\xb6\x1f\x7e\x9f\x5f\xec\xcb\xfb\xe7\xdb\xd7\xf7\xf9\x03\xbc\xcc\xdc\x9f\x6c\xf9\x00\x00\x58\x4f\x6e\x2c\xa5\xb6\x33\x89\x83\xc1\xbb\x10\x49\x3a\x7c\xc8\xb5\x79\xc5\x83\x2c\x93\x30\xf5\x29\x5d\xf8\x3e\xdc\x00\xb5\x45\x68\x73\x0e\x8f\xe8\x79\x5a\x6e\x29\xd1\x32\xe6\x6c\x4d\xf9\xb3\x6e\xee\x22\x04\xe2\x0e\xa3\x6c\x4c\xd1\x13\x09\x82\x6c\x2b\x75\x28\xf4\x23\x66\x88\x11\xc1\x07\xba\x76\xb8\xd7\x66\x76\xd3\xd2\xea\xd0\x54\x9b\x7f\xf2\x7e\x76\xe3\xd6\x95\x96\x51\xf9\xca\x85\x26\xe7\x92\xca\xd4\x58\xf6\x72\x1f\xb7\x27\x0e\xfb\x58\x57\xeb\x8d\x6b\xa0\xfe\x94\xd2\xe0\x98\xa1\x3d\x07\x3a\x6a\x46\xc5\xea\xa2\x31\xff\x60\x85\x60\x8d\x3e\xeb\x6f\x00\x00\x00\xff\xff\x1e\x3c\x4d\x87\x6d\x01\x00\x00")
+
+func templatesHtmlBaseHtmlTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesHtmlBaseHtmlTmpl,
+		"templates/html/base.html.tmpl",
+	)
+}
+
+func templatesHtmlBaseHtmlTmpl() (*asset, error) {
+	bytes, err := templatesHtmlBaseHtmlTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/html/base.html.tmpl", size: 365, mode: os.FileMode(420), modTime: time.Unix(1590859748, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesHtmlErrorHtmlTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xaa\xae\x4e\x49\x4d\xcb\xcc\x4b\x55\x50\x2a\xc9\x2c\xc9\x49\x55\xaa\xad\xe5\x72\x2d\x2a\xca\x2f\x52\xd0\x55\x28\x2a\x2d\xce\xc8\xc9\xcc\xcb\xe6\xaa\xae\x4e\xcd\x4b\xa9\xad\x05\x04\x00\x00\xff\xff\x73\xdb\x0d\xaf\x2b\x00\x00\x00")
+
+func templatesHtmlErrorHtmlTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesHtmlErrorHtmlTmpl,
+		"templates/html/error.html.tmpl",
+	)
+}
+
+func templatesHtmlErrorHtmlTmpl() (*asset, error) {
+	bytes, err := templatesHtmlErrorHtmlTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/html/error.html.tmpl", size: 43, mode: os.FileMode(420), modTime: time.Unix(1568580372, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesHtmlIndexHtmlTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xbc\x95\x4d\x6f\xe3\x36\x13\xc7\xef\xfc\x14\xb3\xf4\x61\x9f\x07\x88\xc5\x64\x8f\xae\x24\xf4\x0d\x01\x16\x70\x81\xc2\x5b\xa3\x40\x6f\xb4\x38\xb2\x98\x52\x1c\x81\x1c\xd9\x31\xbc\xfe\xee\x05\x29\x3b\x71\x52\x64\xd1\x00\x45\x6f\x1a\x72\xe6\x3f\xe4\x6f\x86\xa3\xe3\xd1\x60\x6b\x3d\x82\xec\x50\x9b\xb9\x1e\x06\xf4\x46\x9e\x4e\xa2\x8c\x4d\xb0\x03\x03\x1f\x06\xac\x24\xe3\x23\xab\x07\xbd\xd3\xd3\xaa\x84\x18\x9a\x4a\xaa\x87\xa8\x4c\xd0\x5b\x13\x68\x28\x1e\xa2\x04\x83\x2d\x86\xba\x54\x93\x57\x2d\x8e\x47\xf4\xe6\x74\x12\xe2\x39\xcd\x86\xcc\x21\xeb\x1b\xbb\x83\xc8\x07\x87\x95\xdc\xd9\x68\x37\xd6\x59\x3e\x2c\x3a\x6b\x0c\xfa\xef\x80\x06\xdd\x24\xfb\x56\x82\x35\x95\x4c\x19\xfe\x20\x8f\xb2\xbe\xb7\x0e\xc1\xfa\x86\x7a\xeb\xb7\x1f\x60\xf1\x73\xa9\x8c\xdd\xd5\xa2\xec\xee\xea\xd9\x6a\x0d\x83\x8e\x8c\x73\x33\xf6\x43\xa9\xba\xbb\x5a\x88\x1f\x75\x44\x03\xe4\xa1\x63\x1e\xe2\x42\xa9\xdb\xc7\xdb\x22\xb2\xba\x01\xee\x6c\x84\x68\x19\x41\x3b\x47\xfb\x08\x07\x1a\x81\x09\x50\x47\xeb\x0e\x30\x0e\x8e\xb4\x81\xd6\x3a\x8c\xa0\xbd\x81\xd8\x51\x60\xf4\xb0\x5e\x2d\x23\x8c\xd1\xfa\xad\xe0\x0e\xa1\xa1\xbe\x4f\xdb\xce\x7a\x2c\x84\x28\xbb\x4f\xf5\xef\xb8\x99\xff\xf0\xeb\xe7\x52\x75\x9f\x6a\x51\x46\x6c\xd8\x92\xaf\x05\x00\x40\xd9\x52\xe8\xf3\x9d\x92\xf0\x3a\xe7\xb8\xa7\xd0\x4b\xd0\xd9\xab\x92\x4a\x42\x8f\xdc\x91\xa9\xe4\x40\x91\x25\xa0\x6f\xa6\x2a\xf4\xa3\x63\x3b\xe8\xc0\x2a\x89\xcc\x8d\x66\x2d\x27\xd5\xac\xec\xf4\x06\x1d\x34\x4e\xc7\x58\xc9\xe4\xb1\x4c\x0b\x12\x5a\x0a\x2f\xb2\x59\x74\x46\xd6\x93\x01\x3a\x5f\x70\x51\xaa\x1c\x7d\xa5\x66\xfd\x30\xf2\xeb\x83\xe6\xd0\xeb\x14\xbf\x68\xeb\x25\x78\xdd\xe3\xe4\x27\xcf\x0d\x33\x7d\xab\x77\xeb\x7d\x19\x37\xbd\xe5\x8b\x4a\x3c\x5b\x3b\xed\x46\xac\xe4\x54\x91\x0f\x4f\xba\x65\xe6\x50\x8b\x52\x3d\x21\x7e\x0b\xf6\xb9\x76\xeb\xd5\xf2\xbf\x80\x7d\x95\xed\x15\xec\xf5\x6a\xf9\x4d\xd6\xaf\x23\xdf\x62\x7d\xf6\xbb\x80\x1a\x83\x7b\x8b\xf6\xb3\xe2\x85\xed\x3f\xc5\x7d\x8e\xfc\x26\xef\xdc\xee\x3f\x5d\xbd\x00\x78\xee\xfb\x21\x60\x2d\x66\xf0\xa2\xd1\x44\x33\x06\x07\xf3\xfb\x8f\xc9\xa8\xbe\x3f\xd0\x18\xd2\x57\x31\xf8\xed\x47\x28\x35\x74\x01\xdb\x4a\x1e\x8f\xc5\x8a\x88\xd7\xab\xe5\xe9\x24\xeb\x6b\xab\x54\xba\x16\x62\x06\x5f\xce\x6f\x31\x13\x7d\x12\x3d\x9f\xb8\x4a\x4f\x7d\xa1\x14\x3e\xea\x7e\x70\x58\x34\xd4\xab\x48\x3d\x2a\x47\x7e\xab\xc6\xe0\xde\x95\xea\xb7\x0e\xa1\xb5\x21\xf2\x74\x3f\x6a\x21\xbd\xfa\x80\x71\x74\x0c\x7b\xeb\x1c\x34\xe4\x59\x5b\x9f\xd7\xcf\x47\x40\x93\x0e\x56\x88\x99\x98\xc1\xe7\x69\x87\xb8\xc3\x90\x35\xe2\x4d\x1e\x35\x39\xb6\xb5\xde\x9c\xb7\xac\x4f\x78\x75\x02\x7b\x93\x46\x9c\x1b\x4d\x9a\x31\xb3\xeb\x8d\x3c\xc8\x68\x9f\xc6\x94\x41\x87\x8c\xaf\x92\xd2\xe6\x01\x1b\x2e\xc4\x33\x77\x1a\x39\xb5\x42\x1b\xa8\x07\xed\xa7\x4c\x43\xa0\x06\x63\x14\xad\xdd\x3a\x64\x58\x8d\xb1\x73\xd6\xff\x09\x5f\xe1\x65\x79\xe6\xef\x03\x45\x97\x99\x39\xd5\x3a\x0f\x4d\xf2\xee\x00\xf8\xc8\x41\x37\xfc\x77\x40\xf0\x3f\x5b\x60\x01\xdc\x05\xda\x83\xde\xeb\xc3\x85\x2d\xff\xff\xdf\xe8\x14\xf8\x0a\xe9\xb7\x06\x73\x0f\x77\xa2\x54\xb9\x21\x2f\xff\xa4\xbf\x02\x00\x00\xff\xff\x55\x95\x0e\x65\xfa\x06\x00\x00")
+
+func templatesHtmlIndexHtmlTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesHtmlIndexHtmlTmpl,
+		"templates/html/index.html.tmpl",
+	)
+}
+
+func templatesHtmlIndexHtmlTmpl() (*asset, error) {
+	bytes, err := templatesHtmlIndexHtmlTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/html/index.html.tmpl", size: 1786, mode: os.FileMode(420), modTime: time.Unix(1609421047, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesHtmlPastemetaHtmlTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x94\x94\xc1\x6e\xdb\x38\x10\x86\xef\x7a\x8a\x01\x0f\x89\x73\x90\x75\x4f\x24\x2d\x76\x9d\x5d\x60\xd1\x1c\x8a\xd4\xe9\xa1\x37\x5a\x1c\xc7\x8c\x69\x92\x25\x47\x49\x0c\x82\xef\x5e\x50\xb4\x65\xa7\x71\x5b\xe7\x22\x40\xc3\xe1\xf7\xcf\x3f\x98\x61\x08\x02\x97\x52\x23\x30\x92\xa4\x90\xc5\x58\x5c\x86\x30\xfd\xcc\x3d\xe1\xf4\x13\x6e\x63\x0c\x61\xfa\x9f\x54\xf8\xef\x2b\xc5\x78\x09\x1b\x24\x2e\x38\x71\x28\xc1\xf5\x7e\xa5\xa4\x5e\x17\x21\xa0\x16\x31\x16\xc5\x01\xb6\x42\x2e\x4a\x6e\x2d\x6a\x91\x90\xb5\xef\x9c\xb4\x04\xb4\xb5\xd8\x30\xc2\x57\xaa\x9e\xf8\x33\xcf\x51\x06\xde\x75\x0d\xab\x9e\x7c\xd5\x19\xbb\xed\x94\xb4\x0b\xc3\x9d\x98\x3e\x79\x06\x02\x97\xe8\xda\xba\xca\xa9\xed\x29\xad\x85\x11\xdb\x41\xc4\x3a\x04\x29\x1a\x96\x28\x73\x33\xdb\x73\x66\x46\x13\x97\x1a\x1d\x83\x4e\x71\xef\x1b\xb6\x92\x42\xa0\x66\x6d\x51\x2f\x7a\x22\xa3\xc1\xe8\x4e\xc9\x6e\xfd\xee\xea\x24\xf5\xe2\xde\x18\x7a\xb8\xbf\x8b\xb1\xfa\x4d\x63\xae\x58\x3b\x33\x76\x0b\x0f\xf7\x77\x40\x06\x46\x13\x75\x95\x25\x5a\xa8\xbd\xe5\xfa\x54\x7d\x5f\x88\x53\xef\x59\x32\x69\xb9\x6e\x8b\xba\xb2\x0e\xdb\xc1\x4e\x5b\xd4\x1c\x56\x0e\x97\x0d\x3b\xb3\x10\xd6\x9e\x99\x58\x57\xbc\x2d\xca\xb2\x2c\x42\x90\x4b\xe0\x5a\xc0\x44\x23\xec\xb2\x53\x49\xe9\xeb\xa4\x7e\x04\x26\x50\x21\xa1\x60\x57\x30\x9d\x71\x7d\x3b\xfc\xfd\x63\x8c\x8a\xb1\x78\x91\xb4\x82\x7c\x0e\x64\xd6\xa8\xaf\xe1\xa3\x15\xff\x95\xaf\xcf\xd3\xed\x66\x4c\xbb\x3d\x04\x3f\x60\xea\x0c\xd6\xe0\x3b\x04\x54\x1e\xa1\x3c\xed\xe0\x42\xd1\x4d\xaf\xd7\xda\xbc\xe8\x8b\x47\xba\xc9\x33\x37\x24\xa7\xf9\xbd\x86\x11\x3c\xdf\x5a\x8c\xb1\xf0\xa9\x5b\x47\xe1\xa1\x7b\x31\xe6\xce\xee\x62\x33\x87\x9c\x50\xfc\x4d\xd3\xff\xfd\x37\x74\x66\xc0\x75\x39\x78\x0d\x3b\xb5\xe3\xba\xc6\xb3\x11\x3b\x22\x06\xf4\xbe\xa4\x63\x91\x07\x2b\xde\x8b\x28\xee\x09\xfa\x7c\x72\x52\xe9\x6d\xc2\x28\x37\xc2\x7e\x29\x97\xfb\x9a\xe4\xbe\x72\x25\xf3\xf9\x6e\x56\x80\xd3\x11\xea\x90\x38\x97\x1b\x7c\xc3\x7b\xdb\xf9\x10\x0e\x13\x96\xa7\x2f\xed\xf5\xd2\xb8\x0d\xf0\x8e\xa4\xd1\xcd\x6e\x18\xcf\x19\x9a\xf4\x56\xad\x8c\x68\x98\x35\x9e\xd2\xb2\x4b\x6d\xfb\xfd\x1b\xe4\xfb\xc5\x46\x12\x03\xcd\x37\xb8\x87\x32\x78\xe6\xaa\xc7\x86\x65\x0e\xd8\x04\x65\x45\x08\x25\xc8\x25\x18\x07\x13\xfc\xfe\xa7\x0d\x99\x68\x43\x3f\xad\xc9\x55\x36\x2a\x3d\x5f\x28\x14\x03\x6e\xef\x3e\x2d\x7b\x72\x37\x2e\xfd\xfe\x79\xfb\x11\x00\x00\xff\xff\x3a\xc6\xf5\xbb\x97\x05\x00\x00")
+
+func templatesHtmlPastemetaHtmlTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesHtmlPastemetaHtmlTmpl,
+		"templates/html/pasteMeta.html.tmpl",
+	)
+}
+
+func templatesHtmlPastemetaHtmlTmpl() (*asset, error) {
+	bytes, err := templatesHtmlPastemetaHtmlTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/html/pasteMeta.html.tmpl", size: 1431, mode: os.FileMode(420), modTime: time.Unix(1620245565, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesTxtBaseTxtTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x01\x00\x00\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00")
+
+func templatesTxtBaseTxtTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesTxtBaseTxtTmpl,
+		"templates/txt/base.txt.tmpl",
+	)
+}
+
+func templatesTxtBaseTxtTmpl() (*asset, error) {
+	bytes, err := templatesTxtBaseTxtTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/txt/base.txt.tmpl", size: 0, mode: os.FileMode(420), modTime: time.Unix(1568569370, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesTxtErrorTxtTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xaa\xae\xd6\xf3\x4d\x2d\x2e\x4e\x4c\x4f\xad\xad\x05\x04\x00\x00\xff\xff\xa1\x68\xe0\xbd\x0c\x00\x00\x00")
+
+func templatesTxtErrorTxtTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesTxtErrorTxtTmpl,
+		"templates/txt/error.txt.tmpl",
+	)
+}
+
+func templatesTxtErrorTxtTmpl() (*asset, error) {
+	bytes, err := templatesTxtErrorTxtTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/txt/error.txt.tmpl", size: 12, mode: os.FileMode(420), modTime: time.Unix(1568575116, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesTxtIndexTxtTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x8c\x91\xcf\x6a\xdc\x30\x10\xc6\xef\x7a\x8a\x0f\x7c\x48\x0b\xbb\x76\x7a\x0d\x2c\xb4\x85\xed\x1f\x08\x2d\x78\xe3\x07\x50\xed\xf1\x5a\xed\x58\x63\xa4\x11\x5e\x93\xe4\xdd\x8b\x9c\x6d\xd9\x26\x3d\x44\x27\x49\xc3\xcc\xef\xe3\x37\x45\xdd\xa0\xa9\x6f\x71\xf8\xf2\xbd\xbe\xdb\x7f\xdb\xd7\x66\xf7\xfc\x18\xf3\xd1\x46\xea\x20\x1e\x83\xea\x14\x6f\xaa\xea\xfa\x74\x5d\x46\xad\x36\xd0\xc1\x45\x44\xa7\x04\xcb\x2c\x73\xc4\x22\x09\x2a\x20\x1b\x1d\x2f\x88\x83\x04\x25\x9f\x09\x11\x29\x3a\x7f\x34\x3a\x10\x5a\x19\x47\xeb\x3b\xb0\xf3\x54\x1a\x53\x14\x68\x0e\x1f\x3e\xef\x8d\x29\xd0\x4c\x2c\xb6\x83\x45\xef\x98\x4c\x9b\x02\x63\xfb\xe9\x2a\x3f\x76\xef\x17\x49\x21\xdf\xca\xc9\x1f\xaf\x70\x7f\x5f\xd6\x22\xda\xd4\xb7\x8f\x8f\xb9\xf3\x70\x66\xd9\x4c\xfb\xdb\x79\x4e\xb0\xcb\xc9\x6f\xaa\x8a\x4e\x76\x9c\x98\xca\x56\xc6\x2a\xca\x48\x15\x8b\x3f\x56\x29\xf0\xcb\x79\x77\x03\xa1\x77\x21\xea\x1a\x13\xd2\x23\x47\x0f\x14\x13\x2b\x66\xc7\x8c\x56\xbc\x5a\xe7\xd7\xff\x33\x87\xba\x4c\x2f\x4d\x61\x0a\x7c\x7d\xaa\x88\x0e\x14\xd6\x19\x71\xb3\xea\x59\x7b\x7b\xe7\xbb\x73\xc9\xf9\x5e\xc2\x68\xd5\x89\xdf\xc0\xf9\x96\x53\x97\x45\x15\x97\x85\x55\xbe\xcc\x59\x6d\x47\x4c\x4a\xcf\xa0\xf2\xe3\x27\xb5\x5a\x5e\x18\x94\xa4\x53\x52\xf4\x41\x46\x58\xff\x44\x9a\x82\xb4\x14\xa3\xe9\xdd\x91\x49\x51\xa7\x38\xb0\xf3\xbf\xf0\x80\x7f\x45\x6f\xff\x63\x43\x90\x2e\x57\x83\xbc\x3f\xf1\xbc\x80\x4e\x1a\x6c\xab\x2f\x2d\xe0\x8d\x2b\xa9\x84\x0e\x41\x66\xd8\xd9\x2e\x7f\x04\xea\xdb\x57\x2f\x16\x0f\x18\xc8\x76\xd8\x7a\xbc\x33\xbf\x03\x00\x00\xff\xff\x54\x6e\xbb\xfa\xac\x02\x00\x00")
+
+func templatesTxtIndexTxtTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesTxtIndexTxtTmpl,
+		"templates/txt/index.txt.tmpl",
+	)
+}
+
+func templatesTxtIndexTxtTmpl() (*asset, error) {
+	bytes, err := templatesTxtIndexTxtTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/txt/index.txt.tmpl", size: 684, mode: os.FileMode(420), modTime: time.Unix(1590859748, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+var _templatesTxtPastemetaTxtTmpl = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xac\x51\x4f\x4b\x3b\x31\x10\xbd\xe7\x53\x0c\xf9\x5d\x7e\x82\x89\xf7\xe2\x1f\xb4\x5d\x41\xec\x41\xea\x7a\xf1\xd4\x65\x77\x6a\x43\x97\xa4\x6e\x66\x69\x97\x30\xdf\x5d\x36\xa9\xb1\xa8\x07\x41\x2f\x81\xcc\xbc\x79\xef\xcd\x9b\x10\xf4\xc2\x39\x7a\x5a\xcc\x99\xcf\x42\xd0\x0f\x95\x27\xd4\xf7\x38\x30\x87\xa0\x6f\x4d\x8b\xc5\x9e\x98\x85\x52\x4a\x84\x60\x56\x50\xd9\x06\xfe\x5b\x84\x03\xf2\x91\xaa\xf8\x76\xc6\xbe\x80\x6c\xb0\x45\xc2\x46\x9e\x80\x9e\x56\x76\x16\x7f\x37\xce\xb5\xcc\x62\x67\x68\x0d\xa9\x0f\xe4\x36\x68\x27\xf0\x43\xed\xab\x34\x55\x8e\x43\x17\x19\x36\xfb\x28\x32\x8b\x10\xb0\xf5\x08\xea\x7b\xa1\xf3\xde\x6e\xac\xdb\xd9\xcb\x11\x67\x9b\x11\x46\xc3\x16\xa3\x83\xc4\x56\x0e\x5b\x64\x16\x7e\xdc\xe6\xa8\x1c\xb7\x8b\xf4\x66\xf5\xbe\xf1\xb4\xc3\x8a\xb0\xb9\x26\x7d\xe7\x9f\xb1\x73\x51\xb4\x4e\xc5\x09\x1c\x94\x8e\x0d\xe5\x5e\xa6\xcd\x14\xc9\x79\x72\x24\xbe\x84\x93\x23\x4c\xf1\x32\x8b\xdf\x9d\x60\xb9\x5c\x8a\x7f\x50\xba\x9c\xce\xda\xf8\xcf\x11\x9c\x02\xee\xb1\xee\x09\x27\xa2\xee\xbb\x16\x94\xea\xf0\xb5\x47\x4f\x20\x67\xc5\xbc\x28\x0b\x09\xf2\xef\xee\x26\xa3\xa7\x18\x01\xb3\x78\x0b\x00\x00\xff\xff\x81\xcd\x43\x9e\x8c\x02\x00\x00")
+
+func templatesTxtPastemetaTxtTmplBytes() ([]byte, error) {
+	return bindataRead(
+		_templatesTxtPastemetaTxtTmpl,
+		"templates/txt/pasteMeta.txt.tmpl",
+	)
+}
+
+func templatesTxtPastemetaTxtTmpl() (*asset, error) {
+	bytes, err := templatesTxtPastemetaTxtTmplBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "templates/txt/pasteMeta.txt.tmpl", size: 652, mode: os.FileMode(420), modTime: time.Unix(1620245565, 0)}
+	a := &asset{bytes: bytes, info: info}
+	return a, nil
+}
+
+// Asset loads and returns the asset for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func Asset(name string) ([]byte, error) {
+	cannonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[cannonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
+		}
+		return a.bytes, nil
+	}
+	return nil, fmt.Errorf("Asset %s not found", name)
+}
+
+// MustAsset is like Asset but panics when Asset would return an error.
+// It simplifies safe initialization of global variables.
+func MustAsset(name string) []byte {
+	a, err := Asset(name)
+	if err != nil {
+		panic("asset: Asset(" + name + "): " + err.Error())
+	}
+
+	return a
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	cannonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[cannonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
+		}
+		return a.info, nil
+	}
+	return nil, fmt.Errorf("AssetInfo %s not found", name)
+}
+
+// AssetNames returns the names of the assets.
+func AssetNames() []string {
+	names := make([]string, 0, len(_bindata))
+	for name := range _bindata {
+		names = append(names, name)
+	}
+	return names
+}
+
+// _bindata is a table, holding each asset generator, mapped to its name.
+var _bindata = map[string]func() (*asset, error){
+	"css/main.css":                       cssMainCss,
+	"js/copyclipboard.js":                jsCopyclipboardJs,
+	"js/dragdrop.js":                     jsDragdropJs,
+	"templates/html/base.html.tmpl":      templatesHtmlBaseHtmlTmpl,
+	"templates/html/error.html.tmpl":     templatesHtmlErrorHtmlTmpl,
+	"templates/html/index.html.tmpl":     templatesHtmlIndexHtmlTmpl,
+	"templates/html/pasteMeta.html.tmpl": templatesHtmlPastemetaHtmlTmpl,
+	"templates/txt/base.txt.tmpl":        templatesTxtBaseTxtTmpl,
+	"templates/txt/error.txt.tmpl":       templatesTxtErrorTxtTmpl,
+	"templates/txt/index.txt.tmpl":       templatesTxtIndexTxtTmpl,
+	"templates/txt/pasteMeta.txt.tmpl":   templatesTxtPastemetaTxtTmpl,
+}
+
+// AssetDir returns the file names below a certain
+// directory embedded in the file by go-bindata.
+// For example if you run go-bindata on data/... and data contains the
+// following hierarchy:
+//     data/
+//       foo.txt
+//       img/
+//         a.png
+//         b.png
+// then AssetDir("data") would return []string{"foo.txt", "img"}
+// AssetDir("data/img") would return []string{"a.png", "b.png"}
+// AssetDir("foo.txt") and AssetDir("notexist") would return an error
+// AssetDir("") will return []string{"data"}.
+func AssetDir(name string) ([]string, error) {
+	node := _bintree
+	if len(name) != 0 {
+		cannonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(cannonicalName, "/")
+		for _, p := range pathList {
+			node = node.Children[p]
+			if node == nil {
+				return nil, fmt.Errorf("Asset %s not found", name)
+			}
+		}
+	}
+	if node.Func != nil {
+		return nil, fmt.Errorf("Asset %s not found", name)
+	}
+	rv := make([]string, 0, len(node.Children))
+	for childName := range node.Children {
+		rv = append(rv, childName)
+	}
+	return rv, nil
+}
+
+type bintree struct {
+	Func     func() (*asset, error)
+	Children map[string]*bintree
+}
+
+var _bintree = &bintree{nil, map[string]*bintree{
+	"css": &bintree{nil, map[string]*bintree{
+		"main.css": &bintree{cssMainCss, map[string]*bintree{}},
+	}},
+	"js": &bintree{nil, map[string]*bintree{
+		"copyclipboard.js": &bintree{jsCopyclipboardJs, map[string]*bintree{}},
+		"dragdrop.js":      &bintree{jsDragdropJs, map[string]*bintree{}},
+	}},
+	"templates": &bintree{nil, map[string]*bintree{
+		"html": &bintree{nil, map[string]*bintree{
+			"base.html.tmpl":      &bintree{templatesHtmlBaseHtmlTmpl, map[string]*bintree{}},
+			"error.html.tmpl":     &bintree{templatesHtmlErrorHtmlTmpl, map[string]*bintree{}},
+			"index.html.tmpl":     &bintree{templatesHtmlIndexHtmlTmpl, map[string]*bintree{}},
+			"pasteMeta.html.tmpl": &bintree{templatesHtmlPastemetaHtmlTmpl, map[string]*bintree{}},
+		}},
+		"txt": &bintree{nil, map[string]*bintree{
+			"base.txt.tmpl":      &bintree{templatesTxtBaseTxtTmpl, map[string]*bintree{}},
+			"error.txt.tmpl":     &bintree{templatesTxtErrorTxtTmpl, map[string]*bintree{}},
+			"index.txt.tmpl":     &bintree{templatesTxtIndexTxtTmpl, map[string]*bintree{}},
+			"pasteMeta.txt.tmpl": &bintree{templatesTxtPastemetaTxtTmpl, map[string]*bintree{}},
+		}},
+	}},
+}}
+
+// RestoreAsset restores an asset under the given directory
+func RestoreAsset(dir, name string) error {
+	data, err := Asset(name)
+	if err != nil {
+		return err
+	}
+	info, err := AssetInfo(name)
+	if err != nil {
+		return err
+	}
+	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
+	if err != nil {
+		return err
+	}
+	err = ioutil.WriteFile(_filePath(dir, name), data, info.Mode())
+	if err != nil {
+		return err
+	}
+	err = os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
+// RestoreAssets restores an asset under the given directory recursively
+func RestoreAssets(dir, name string) error {
+	children, err := AssetDir(name)
+	// File
+	if err != nil {
+		return RestoreAsset(dir, name)
+	}
+	// Dir
+	for _, child := range children {
+		err = RestoreAssets(dir, filepath.Join(name, child))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func _filePath(dir, name string) string {
+	cannonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(cannonicalName, "/")...)...)
+}

cmd/rushlink/main.go

@@ -6,28 +6,32 @@ import (
 
 	"gitea.hashru.nl/dsprenkels/rushlink"
 	"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
+	"github.com/pkg/errors"
 )
 
 var (
-	databasePath  = flag.String("database", "", "location of the database file")
-	fileStorePath = flag.String("file-store", "", "path to the directory where uploaded files will be stored")
 	httpListen    = flag.String("listen", "127.0.0.1:8000", "listen address (host:port)")
 	metricsListen = flag.String("metrics_listen", "127.0.0.1:58614", "listen address for metrics (host:port)")
+	rootURL       = flag.String("root_url", "", "host root (example: 'https://example.com', uses an educated guess if omitted)")
 )
 
 func main() {
 	flag.Parse()
 
-	database, err := db.OpenDB(*databasePath)
+	filestore, err := db.OpenFileStoreFromEnvironment()
 	if err != nil {
 		log.Fatalln(err)
 	}
-	defer database.Close()
+	database, err := db.OpenDBFromEnvironment()
-	filestore, err := db.OpenFileStore(*fileStorePath)
 	if err != nil {
 		log.Fatalln(err)
 	}
 
-	go rushlink.StartMetricsServer(*metricsListen, database)
+	migrate := db.Gormigrate(database)
-	rushlink.StartMainServer(*httpListen, database, filestore)
+	if err := migrate.Migrate(); err != nil {
+		log.Fatal(errors.Wrap(err, "migrating database"))
+	}
+
+	go rushlink.StartMetricsServer(*metricsListen, database, filestore)
+	rushlink.StartMainServer(*httpListen, database, filestore, *rootURL)
 }

contrib/rushlink

@@ -0,0 +1,122 @@
+#!/usr/bin/env sh
+
+set -e
+
+LINK=https://hashru.link/
+DELFILE="${XDG_DATA_HOME:-$HOME/.local/share}/rushlink/delete"
+
+link() {
+    case "$1" in
+        https://*|http://*)
+            printf '%s' "$1" | curl -sS -F'shorten=<-' "$LINK"
+            ;;
+        *)
+            curl -sS -Ffile=@- "$LINK" < "$1"
+            ;;
+    esac | awk 'NR == 1 { print } $NF ~ /deleteToken=/ { print $NF; exit }' | (
+        IFS= read -r link
+        IFS= read -r deletelink
+        echo "$link"
+        mkdir -p "$(dirname "$DELFILE")"
+        echo "$deletelink" >> "$DELFILE"
+    )
+}
+
+del() {
+    case "$1" in
+        https://*|http://*)
+            URL="$1"
+            ;;
+        *)
+            URL="$LINK$1"
+            ;;
+    esac
+    # Remove file extension, if any.
+    NAME="${URL##*/}"
+    URL="${URL%/*}/${NAME%%.*}"
+    if DELURL=$(grep -s -m1 "$URL?deleteToken=" "$DELFILE"); then
+        echo "Deleting $URL..." >&2
+        curl -sS -X DELETE "$DELURL" | grep deleted
+    else
+        echo "Delete token for $URL is not known." >&2
+        exit 1
+    fi
+}
+
+screenshot() {
+    if command -v import >/dev/null 2>&1; then
+        CMD="import png:-"
+    elif command -v maim >/dev/null 2>&1; then
+        CMD="maim -uks"
+    else
+        echo "Neither import (imagemagick) nor maim were found. One of these is needed to make screenshots." >&2
+        exit 1
+    fi
+    FILE=$(mktemp)
+    if $CMD > "$FILE"; then
+        LINK=$(link "$FILE")
+        rm -f "$FILE"
+        echo "$LINK.png"
+        if command -v xdg-open >/dev/null 2>&1; then
+            xdg-open "$LINK.png"
+        fi
+    else
+        rm -f "$FILE"
+        exit $?
+    fi
+}
+
+if [ $# -gt 0 ]; then
+    case "$1" in
+        --help|-h)
+            CMD=$(basename "$0")
+            echo "$CMD - Command line tool for $LINK"
+            echo
+            echo "Usage:"
+            echo "    $CMD https://example.com/"
+            echo "        Shorten link."
+            echo "    $CMD file.txt"
+            echo "    $CMD < file.txt"
+            echo "        Upload file."
+            echo "    $CMD"
+            echo "    echo hi | $CMD"
+            echo "        Upload file from standard input."
+            echo "    $CMD (--screenshot|-s)"
+            echo "        Select a window or an area of your screen, and upload it as png."
+            echo "    $CMD (--delete|-d) ${LINK}xd42"
+            echo "    $CMD (--delete|-d) xd42"
+            echo "        Delete file or shortened link."
+            echo
+            echo "Delete tokens are stored in $DELFILE"
+            exit 0
+            ;;
+        --delete|-d)
+            shift
+            for url in "$@"; do
+                del "$url"
+            done
+            exit 0
+            ;;
+        --screenshot|-s)
+            shift
+            if [ $# -gt 0 ]; then
+                echo "No arguments expected to --screenshot" >&2
+                exit 1
+            fi
+            screenshot
+            exit 0
+            ;;
+        *)
+            for url in "$@"; do
+                link "$url"
+            done
+            exit 0
+    esac
+fi
+
+if [ -t 0 ]; then
+    echo "Sending standard input to $LINK" >&2
+    echo "^C to cancel, ^D to send." >&2
+fi
+
+link /dev/stdin

fileupload.go

@@ -7,9 +7,6 @@ import (
 	"github.com/pkg/errors"
 )
 
-// Where to store the uploaded files
-var fileStoreDir = ""
-
 // FileUploadFileSystem is a HTTP filesystem handler
 type FileUploadFileSystem struct {
 	fs http.FileSystem

go.mod

@@ -3,9 +3,58 @@ module gitea.hashru.nl/dsprenkels/rushlink
 go 1.12
 
 require (
-	github.com/google/uuid v1.1.1
+	github.com/Masterminds/semver/v3 v3.1.1 // indirect
-	github.com/gorilla/mux v1.7.3
+	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/pkg/errors v0.8.1
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
-	github.com/prometheus/client_golang v1.1.0
+	github.com/cockroachdb/apd v1.1.0 // indirect
-	go.etcd.io/bbolt v1.3.3
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/denisenkom/go-mssqldb v0.11.0 // indirect
+	github.com/go-gormigrate/gormigrate/v2 v2.0.0
+	github.com/go-kit/kit v0.10.0 // indirect
+	github.com/go-sql-driver/mysql v1.6.0 // indirect
+	github.com/gofrs/uuid v4.0.0+incompatible // indirect
+	github.com/golang-sql/civil v0.0.0-20190719163853-cb61b32ac6fe // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/go-cmp v0.5.6 // indirect
+	github.com/google/uuid v1.3.0
+	github.com/gorilla/mux v1.8.0
+	github.com/jackc/chunkreader/v2 v2.0.1 // indirect
+	github.com/jackc/pgconn v1.10.0 // indirect
+	github.com/jackc/pgio v1.0.0 // indirect
+	github.com/jackc/pgmock v0.0.0-20210724152146-4ad1a8207f65 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgproto3/v2 v2.1.1 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20200714003250-2b9c44734f2b // indirect
+	github.com/jackc/pgtype v1.8.1 // indirect
+	github.com/jackc/pgx/v4 v4.13.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.2 // indirect
+	github.com/joho/godotenv v1.4.0 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/lib/pq v1.10.3 // indirect
+	github.com/mattn/go-sqlite3 v1.14.8 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/pkg/errors v0.9.1
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/client_model v0.2.0 // indirect
+	github.com/prometheus/common v0.31.1 // indirect
+	github.com/prometheus/procfs v0.7.3 // indirect
+	github.com/rogpeppe/go-internal v1.8.0 // indirect
+	github.com/shopspring/decimal v1.2.0 // indirect
+	github.com/stretchr/testify v1.7.0 // indirect
+	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 // indirect
+	golang.org/x/sys v0.0.0-20211002104244-808efd93c36d // indirect
+	golang.org/x/text v0.3.7 // indirect
+	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
+	google.golang.org/protobuf v1.27.1 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
+	gorm.io/driver/mysql v1.1.2 // indirect
+	gorm.io/driver/postgres v1.1.2
+	gorm.io/driver/sqlite v1.1.5
+	gorm.io/driver/sqlserver v1.0.9 // indirect
+	gorm.io/gorm v1.21.15
 )

go.sum

@@ -1,75 +1,916 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
+github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
+github.com/Masterminds/semver/v3 v3.1.1 h1:hLg3sBzpNErnxhQtUy/mmLR2I9foDujNK030IGemrRc=
+github.com/Masterminds/semver/v3 v3.1.1/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
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handlers.go

@@ -3,19 +3,38 @@ package rushlink
 import (
 	"crypto/subtle"
 	"fmt"
-	"io"
 	"log"
 	"mime/multipart"
 	"net/http"
 	"net/url"
 	"os"
+	"strings"
 	"time"
 
 	"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
 	"github.com/google/uuid"
 	"github.com/gorilla/mux"
 	"github.com/pkg/errors"
-	bolt "go.etcd.io/bbolt"
+)
+
+const (
+	// formParseMaxMemory value is based on the default value that is used in
+	// Request.ParseMultipartForm.
+	formParseMaxMemory = 32 << 20 // 32 MB
+
+	// highOnlineEntropy is the desired entropy of an "unguessable" paste URL
+	// (in bits). It should be chosen such that it should be hard for an
+	// attacker to find *any* key that should not be found.
+	// It is desired that the probability to guess a good key is small.
+	//
+	//                         [ amount of pastes ]
+	//     Pr[ good key ] = ---------------------------
+	//                      [ amount of possible keys ]
+	//
+	// So with a conservative [ amount of pastes ] = 2^32 (= 4 billion), and
+	// an [ amount of possible keys ] = 2^80 then the probability of a correct
+	// guess is 2^-48.
+	highOnlineEntropy = 80
 )
 
 type viewPaste uint
@@ -26,69 +45,58 @@ const (
 	viewShowMeta
 )
 
-const cookieDeleteToken = "owner_token"
+type canDelete uint
 
-func (rl *rushlink) indexGetHandler(w http.ResponseWriter, r *http.Request) {
+const (
-	render(w, r, "index", map[string]interface{}{})
+	canDeleteUndef canDelete = iota
+	canDeleteYes
+	canDeleteNo
+)
+
+func (cd *canDelete) Bool() bool {
+	return *cd == canDeleteYes
 }
 
-func (rl *rushlink) uploadFileGetHandler(w http.ResponseWriter, r *http.Request) {
+func (cd *canDelete) String() string {
-	vars := mux.Vars(r)
+	switch *cd {
-	id := vars["id"]
+	case canDeleteUndef:
-
+		return "undefined"
-	var fu *db.FileUpload
+	case canDeleteYes:
-	var badID bool
+		return "correct"
-	if err := rl.db.Bolt.View(func(tx *bolt.Tx) error {
+	case canDeleteNo:
-		fuID, err := uuid.Parse(id)
+		return "invalid"
-		if err != nil {
+	default:
-			badID = true
+		panic("unreachable")
-			return err
-		}
-		fu, err = db.GetFileUpload(tx, fuID)
-		return err
-	}); err != nil {
-		if badID {
-			renderError(w, r, http.StatusNotFound, "malformed file id")
-			return
-		} else {
-			panic(err)
-		}
 	}
+}
 
-	filePath := rl.fs.FilePath(fu.ID, fu.FileName)
+func (rl *rushlink) staticGetHandler(w http.ResponseWriter, r *http.Request) {
-	file, err := os.Open(filePath)
+	rl.renderStatic(w, r, mux.Vars(r)["path"])
-	if err != nil {
+}
-		if os.IsNotExist(err) {
+
-			log.Printf("error: %v should exist according to the database, but it doesn't", filePath)
+func (rl *rushlink) indexGetHandler(w http.ResponseWriter, r *http.Request) {
-			renderError(w, r, http.StatusNotFound, "file not found")
+	rl.render(w, r, http.StatusOK, "index", map[string]interface{}{})
-			return
-		} else {
-			panic(err)
-		}
-	}
-	w.Header().Set("Content-Type", fu.ContentType)
-	io.Copy(w, file)
 }
 
 func (rl *rushlink) viewPasteHandler(w http.ResponseWriter, r *http.Request) {
-	rl.viewPasteHandlerInner(w, r, 0)
+	rl.viewPasteHandlerFlags(w, r, 0)
 }
 
 func (rl *rushlink) viewPasteHandlerNoRedirect(w http.ResponseWriter, r *http.Request) {
-	rl.viewPasteHandlerInner(w, r, viewNoRedirect)
+	rl.viewPasteHandlerFlags(w, r, viewNoRedirect)
 }
 
 func (rl *rushlink) viewPasteHandlerMeta(w http.ResponseWriter, r *http.Request) {
-	rl.viewPasteHandlerInner(w, r, viewShowMeta)
+	rl.viewPasteHandlerFlags(w, r, viewShowMeta)
 }
 
-func (rl *rushlink) viewPasteHandlerInner(w http.ResponseWriter, r *http.Request, flags viewPaste) {
+func (rl *rushlink) viewPasteHandlerFlags(w http.ResponseWriter, r *http.Request, flags viewPaste) {
 	vars := mux.Vars(r)
 	key := vars["key"]
 	var p *db.Paste
-	var fuID *uuid.UUID
 	var fu *db.FileUpload
-	if err := rl.db.Bolt.View(func(tx *bolt.Tx) error {
+	var notFound bool
+	err := rl.db.Transaction(func(tx *db.Database) error {
 		var err error
 		p, err = db.GetPaste(tx, key)
 		if err != nil {
@@ -97,103 +105,184 @@ func (rl *rushlink) viewPasteHandlerInner(w http.ResponseWriter, r *http.Request
 		if p != nil && p.Type == db.PasteTypeFileUpload {
 			var id uuid.UUID
 			copy(id[:], p.Content)
-			fuID = &id
 			fu, err = db.GetFileUpload(tx, id)
 			if err != nil {
 				return err
 			}
 		}
 		return nil
-	}); err != nil {
+	})
-		panic(err)
+	if notFound {
+		err = db.ErrPasteDoesNotExist
 	}
-
+	if err != nil {
-	if p == nil {
+		status := db.ErrHTTPStatusCode(err)
-		renderError(w, r, http.StatusNotFound, "url key not found in the database")
+		if status == http.StatusInternalServerError {
+			panic(err)
+		}
+		rl.renderError(w, r, status, err.Error())
 		return
 	}
+	rl.viewPasteHandlerInner(w, r, flags, p, fu)
+}
 
+func (rl *rushlink) viewPasteHandlerInner(w http.ResponseWriter, r *http.Request, flags viewPaste, p *db.Paste, fu *db.FileUpload) {
 	if flags&viewShowMeta != 0 {
-		canDelete := struct {
+		rl.viewPasteHandlerInnerMeta(w, r, p, fu)
-			Bool   bool
-			String string
-		}{Bool: false}
-		deleteToken := getDeleteTokenFromRequest(r)
-		if deleteToken == "" {
-			canDelete.String = "undefined"
-		} else {
-			if subtle.ConstantTimeCompare([]byte(deleteToken), []byte(p.DeleteToken)) == 1 {
-				canDelete.Bool = true
-				canDelete.String = "correct"
-			} else {
-				canDelete.String = "invalid"
-			}
-		}
-
-		data := map[string]interface{}{
-			"Paste":     p,
-			"CanDelete": canDelete,
-		}
-		render(w, r, "pasteMeta", data)
 		return
 	}
 
 	switch p.State {
 	case db.PasteStatePresent:
-		var location string
 		switch p.Type {
 		case db.PasteTypeFileUpload:
 			if fu == nil {
-				panic(fmt.Sprintf("file for id %v does not exist in database\n", fuID))
+				panic(fmt.Sprintf("file for id %v does not exist in database\n", string(p.Content)))
 			}
-			location = fu.URL().String()
+			rl.viewFileUploadHandler(w, r, fu)
-			break
+			return
 		case db.PasteTypeRedirect:
-			location = p.RedirectURL().String()
+			if flags&viewNoRedirect != 0 {
-			break
+				w.Write([]byte(p.RedirectURL().String()))
+				return
+			}
+			http.Redirect(w, r, p.RedirectURL().String(), http.StatusTemporaryRedirect)
+			return
 		default:
 			panic("paste type unsupported")
 		}
-		if flags&viewNoRedirect == 0 {
+
-			http.Redirect(w, r, location, http.StatusSeeOther)
-		}
-		fmt.Fprint(w, location)
 	case db.PasteStateDeleted:
-		renderError(w, r, http.StatusGone, "paste has been deleted\n")
+		rl.renderError(w, r, http.StatusGone, "paste has been deleted\n")
+		return
 	default:
 		panic(errors.Errorf("invalid paste.State (%v) for key '%v'", p.State, p.Key))
 	}
 }
 
+func (rl *rushlink) viewFileUploadHandler(w http.ResponseWriter, r *http.Request, fu *db.FileUpload) {
+	filePath := fu.Path(rl.fs)
+	file, err := os.Open(filePath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			log.Printf("error: '%v' should exist according to the database, but it doesn't", filePath)
+			rl.renderError(w, r, http.StatusNotFound, "file not found")
+			return
+		}
+		// unexpected error
+		panic(err)
+	}
+
+	var modtime time.Time
+	info, err := file.Stat()
+	if err != nil {
+		log.Printf("error: %v", errors.Wrapf(err, "could not stat file '%v'", filePath))
+	} else {
+		modtime = info.ModTime()
+	}
+
+	// Provide the real filename to the client (to be used in Ctrl+S etc.)
+	quotedName := strings.ReplaceAll(fu.FileName, "\"", "\\\"")
+	w.Header().Set("Content-Disposition", fmt.Sprintf("inline; filename=\"%s\"", quotedName))
+
+	// We use http.ServeContent (instead of http.ServeFile) because we cannot
+	// use http.ServeFile together with the assertion that the file exists,
+	// without introducing a TOCTOU flaw.
+	http.ServeContent(w, r, fu.FileName, modtime, file)
+}
+
+func (rl *rushlink) viewPasteHandlerInnerMeta(w http.ResponseWriter, r *http.Request, p *db.Paste, fu *db.FileUpload) {
+	var cd canDelete
+	deleteToken := getDeleteTokenFromRequest(r)
+	if deleteToken != "" {
+		if subtle.ConstantTimeCompare([]byte(deleteToken), []byte(p.DeleteToken)) == 1 {
+			cd = canDeleteYes
+		} else {
+			cd = canDeleteNo
+		}
+	}
+
+	var fileExt string
+	if fu != nil {
+		fileExt = fu.Ext()
+	}
+	data := map[string]interface{}{
+		"Paste":           p,
+		"FileExt":         fileExt,
+		"CanDeleteString": cd.String(),
+		"CanDeleteBool":   cd.Bool(),
+	}
+	var status int
+	if p.State == db.PasteStateDeleted {
+		status = http.StatusGone
+	} else {
+		status = http.StatusOK
+	}
+	rl.render(w, r, status, "pasteMeta", data)
+}
+
+func (rl *rushlink) viewActionSuccess(w http.ResponseWriter, r *http.Request, p *db.Paste, fu *db.FileUpload) {
+	var fileExt string
+	if fu != nil {
+		fileExt = fu.Ext()
+	}
+	// Redirect to the new paste.
+	pasteURL := url.URL{
+		Path:     fmt.Sprintf("/%s%s/meta", p.Key, fileExt),
+		RawQuery: fmt.Sprintf("deleteToken=%s", url.QueryEscape(p.DeleteToken)),
+	}
+	http.Redirect(w, r, pasteURL.String(), http.StatusFound)
+	// But still render the page for CURL-like clients.
+	cd := canDeleteYes
+	data := map[string]interface{}{
+		"Paste":           p,
+		"FileExt":         fileExt,
+		"CanDeleteString": cd.String(),
+		"CanDeleteBool":   cd.Bool(),
+	}
+	rl.render(w, r, 0, "pasteMeta", data)
+}
+
 func (rl *rushlink) newPasteHandler(w http.ResponseWriter, r *http.Request) {
-	file, fileHeader, err := r.FormFile("file")
+	if err := r.ParseMultipartForm(formParseMaxMemory); err != nil {
-	if err == nil {
+		msg := fmt.Sprintf("could not parse form: %v\n", err)
+		rl.renderError(w, r, http.StatusBadRequest, msg)
+		return
+	}
+
+	fileHeaders, fileHeadersPrs := r.MultipartForm.File["file"]
+	shortens, shortensPrs := r.MultipartForm.Value["shorten"]
+
+	if !shortensPrs && !fileHeadersPrs {
+		rl.renderError(w, r, http.StatusBadRequest, "no 'file' and no 'shorten' fields given in form\n")
+		return
+	}
+	if shortensPrs && fileHeadersPrs {
+		rl.renderError(w, r, http.StatusBadRequest, "both 'file' and 'shorten' fields provided in form\n")
+		return
+	}
+	if shortensPrs {
+		rl.newRedirectPasteHandler(w, r, shortens[0])
+		return
+	}
+	if fileHeadersPrs {
+		fileHeader := fileHeaders[0]
+		file, err := fileHeader.Open()
+		if err != nil {
+			rl.renderInternalServerError(w, r, err)
+			return
+		}
 		rl.newFileUploadPasteHandler(w, r, file, *fileHeader)
 		return
-	} else if err == http.ErrMissingFile {
-		// Fallthrough
-	} else {
-		msg := fmt.Sprintf("could not parse form: %v\n", err)
-		renderError(w, r, http.StatusBadRequest, msg)
-		return
 	}
-
-	shorten := r.FormValue("shorten")
-	if shorten != "" {
-		rl.newRedirectPasteHandler(w, r, shorten)
-		return
-	}
-
-	renderError(w, r, http.StatusBadRequest, "no 'file' and no 'shorten' fields given in form\n")
 }
 
 func (rl *rushlink) newFileUploadPasteHandler(w http.ResponseWriter, r *http.Request, file multipart.File, header multipart.FileHeader) {
 	var fu *db.FileUpload
 	var paste *db.Paste
-	if err := rl.db.Bolt.Update(func(tx *bolt.Tx) error {
+	if err := rl.db.Transaction(func(tx *db.Database) error {
 		var err error
-		// Create the fileUpload in the database
+		fu, err = db.NewFileUpload(rl.fs, file, header.Filename)
-		fu, err = db.NewFileUpload(rl.fs, file, header.Filename, header.Header.Get("Content-Type"))
 		if err != nil {
 			panic(errors.Wrap(err, "creating fileUpload"))
 		}
@@ -201,54 +290,39 @@ func (rl *rushlink) newFileUploadPasteHandler(w http.ResponseWriter, r *http.Req
 			panic(errors.Wrap(err, "saving fileUpload in db"))
 		}
 
-		paste, err = shortenFileUploadID(tx, fu.ID)
+		paste, err = shortenFileUploadID(tx, fu.PubID)
 		return err
 	}); err != nil {
 		panic(err)
 	}
-	data := map[string]interface{}{"Paste": paste}
+	rl.viewActionSuccess(w, r, paste, fu)
-	render(w, r, "newFileUploadPasteSuccess", data)
-}
-
-func (rl *rushlink) newPasteHandlerURLEncoded(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
-	if err := r.ParseForm(); err != nil {
-		next(w, r)
-		return
-	}
-	shorten := r.PostFormValue("shorten")
-	if shorten == "" {
-		renderError(w, r, http.StatusBadRequest, "no 'shorten' param given\n")
-		return
-	}
-	rl.newRedirectPasteHandler(w, r, shorten)
 }
 
 func (rl *rushlink) newRedirectPasteHandler(w http.ResponseWriter, r *http.Request, rawurl string) {
-	userURL, err := url.ParseRequestURI(rawurl)
+	userURL, err := url.Parse(rawurl)
 	if err != nil {
 		msg := fmt.Sprintf("invalid url (%v): %v", err, rawurl)
-		renderError(w, r, http.StatusBadRequest, msg)
+		rl.renderError(w, r, http.StatusBadRequest, msg)
 		return
 	}
 	if userURL.Scheme == "" {
-		renderError(w, r, http.StatusBadRequest, "invalid url (unspecified scheme)\n")
+		rl.renderError(w, r, http.StatusBadRequest, "invalid url (unspecified scheme)\n")
 		return
 	}
 	if userURL.Host == "" {
-		renderError(w, r, http.StatusBadRequest, "invalid url (unspecified host)\n")
+		rl.renderError(w, r, http.StatusBadRequest, "invalid url (unspecified host)\n")
 		return
 	}
 
 	var paste *db.Paste
-	if err := rl.db.Bolt.Update(func(tx *bolt.Tx) error {
+	if err := rl.db.Transaction(func(tx *db.Database) error {
 		var err error
 		paste, err = shortenURL(tx, userURL)
 		return err
 	}); err != nil {
 		panic(err)
 	}
-	data := map[string]interface{}{"Paste": paste}
+	rl.viewActionSuccess(w, r, paste, nil)
-	render(w, r, "newRedirectPasteSuccess", data)
 }
 
 // Delete a URL from the database
@@ -258,61 +332,63 @@ func (rl *rushlink) deletePasteHandler(w http.ResponseWriter, r *http.Request) {
 
 	deleteToken := getDeleteTokenFromRequest(r)
 	if deleteToken == "" {
-		renderError(w, r, http.StatusBadRequest, "no delete token provided\n")
+		rl.renderError(w, r, http.StatusBadRequest, "no delete token provided\n")
 		return
 	}
 
 	var errorCode int
-	var paste db.Paste
+	var paste *db.Paste
-	if err := rl.db.Bolt.Update(func(tx *bolt.Tx) error {
+	if err := rl.db.Transaction(func(tx *db.Database) error {
-		p, err := db.GetPaste(tx, key)
+		var err error
+		paste, err = db.GetPaste(tx, key)
 		if err != nil {
 			errorCode = http.StatusNotFound
 			return err
 		}
-		if p.State == db.PasteStateDeleted {
+		if paste.State == db.PasteStateDeleted {
 			errorCode = http.StatusGone
 			return errors.New("already deleted")
 		}
-		if subtle.ConstantTimeCompare([]byte(deleteToken), []byte(p.DeleteToken)) == 0 {
+		if subtle.ConstantTimeCompare([]byte(deleteToken), []byte(paste.DeleteToken)) == 0 {
 			errorCode = http.StatusForbidden
 			return errors.New("invalid delete token")
 		}
-		if err := p.Delete(tx, rl.fs); err != nil {
+		if err := paste.Delete(tx, rl.fs); err != nil {
 			errorCode = http.StatusInternalServerError
 			return err
 		}
-		paste = *p
 		return nil
 	}); err != nil {
 		log.Printf("error: %v\n", err)
-		renderError(w, r, errorCode, fmt.Sprintf("error: %v\n", err))
+		rl.renderError(w, r, errorCode, fmt.Sprintf("error: %v\n", err))
 		return
 	}
-
+	rl.viewActionSuccess(w, r, paste, nil)
-	data := map[string]interface{}{"Paste": paste}
-	render(w, r, "deletePasteSuccess", data)
 }
 
 // Add a new fileUpload redirect to the database
 //
 // Returns the new paste key if the fileUpload was successfully added to the
 // database
-func shortenFileUploadID(tx *bolt.Tx, id uuid.UUID) (*db.Paste, error) {
+func shortenFileUploadID(tx *db.Database, id uuid.UUID) (*db.Paste, error) {
 	return shorten(tx, db.PasteTypeFileUpload, id[:])
 }
 
 // Add a new URL to the database
 //
 // Returns the new paste key if the url was successfully shortened
-func shortenURL(tx *bolt.Tx, userURL *url.URL) (*db.Paste, error) {
+func shortenURL(tx *db.Database, userURL *url.URL) (*db.Paste, error) {
 	return shorten(tx, db.PasteTypeRedirect, []byte(userURL.String()))
 }
 
 // Add a paste (of any kind) to the database with arbitrary content.
-func shorten(tx *bolt.Tx, ty db.PasteType, content []byte) (*db.Paste, error) {
+func shorten(tx *db.Database, ty db.PasteType, content []byte) (*db.Paste, error) {
 	// Generate the paste key
-	pasteKey, err := db.GeneratePasteKey(tx)
+	var keyEntropy int
+	if ty == db.PasteTypeFileUpload || ty == db.PasteTypePaste {
+		keyEntropy = highOnlineEntropy
+	}
+	pasteKey, err := db.GeneratePasteKey(tx, keyEntropy)
 	if err != nil {
 		return nil, errors.Wrap(err, "generating paste key")
 	}
@@ -330,7 +406,6 @@ func shorten(tx *bolt.Tx, ty db.PasteType, content []byte) (*db.Paste, error) {
 		Content:     content,
 		Key:         pasteKey,
 		DeleteToken: deleteToken,
-		TimeCreated: time.Now().UTC(),
 	}
 	if err := p.Save(tx); err != nil {
 		return nil, err

handlers_test.go

@@ -0,0 +1,222 @@
+package rushlink
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"mime/multipart"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
+	"github.com/gorilla/mux"
+)
+
+// createTemporaryRouter initializes a rushlink instance, with temporary
+// filestore and database.
+//
+// It will use testing.T.Cleanup to cleanup after itself.
+func createTemporaryRouter(t *testing.T) (*mux.Router, *rushlink) {
+	tempDir, err := ioutil.TempDir("", "rushlink-tmp-*")
+	if err != nil {
+		t.Fatalf("creating temporary directory: %s\n", err)
+	}
+	t.Cleanup(func() {
+		os.RemoveAll(tempDir)
+	})
+
+	fileStore, err := db.OpenFileStore(filepath.Join(tempDir, "filestore"))
+	if err != nil {
+		t.Fatalf("opening temporary filestore: %s\n", err)
+	}
+
+	os.Setenv(db.EnvDatabaseDriver, "sqlite")
+	os.Setenv(db.EnvDatabasePath, "file::memory:?cache=shared")
+
+	database, err := db.OpenDBFromEnvironment()
+	if err != nil {
+		t.Fatalf("opening temporary database: %v\n", err)
+	}
+	database.Debug()
+	if err := db.Gormigrate(database).Migrate(); err != nil {
+		t.Fatalf("migration failed: %v\n", err)
+	}
+
+	// *.invalid. is guaranteed not to exist (RFC 6761).
+	rootURL, err := url.Parse("https://rushlink.invalid")
+	if err != nil {
+		t.Fatalf("parsing URL: %s\n", err)
+	}
+
+	rl := rushlink{
+		db:      database,
+		fs:      fileStore,
+		rootURL: rootURL,
+	}
+	r := mux.NewRouter()
+	InitMainRouter(r, &rl)
+	return r, &rl
+}
+
+// checkStatusCode checks whether the status code from a recorded response is equal
+// to some response code.
+func checkStatusCode(t *testing.T, rr *httptest.ResponseRecorder, code int) {
+	if actual := rr.Code; actual != code {
+		t.Logf("request body:\n%v\n", rr.Body.String())
+		t.Fatalf("handler returned wrong status code: got %v want %v\n",
+			actual, code)
+	}
+}
+
+// checkLocationHeader checks whether the status code from a recorded response is equal
+// to some expected URL.
+func checkLocationHeader(t *testing.T, rr *httptest.ResponseRecorder, expected string) {
+	location := rr.Header().Get("Location")
+	if location != expected {
+		t.Fatalf("handler returned bad redirect location: got %v want %v", location, expected)
+	}
+}
+
+func TestIssue43(t *testing.T) {
+	srv, _ := createTemporaryRouter(t)
+
+	// Put a URL with a fragment identifier into the database.
+	var body bytes.Buffer
+	form := multipart.NewWriter(&body)
+	form.WriteField("shorten", "https://example.com#fragment")
+	form.Close()
+	req, err := http.NewRequest("POST", "/", bytes.NewReader(body.Bytes()))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req.Header.Add("Content-Type", form.FormDataContentType())
+	rr := httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusFound)
+	rawURL := strings.SplitN(rr.Body.String(), "\n", 2)[0]
+	pasteURL, err := url.Parse(rawURL)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Check if the URL was encoded correctly.
+	req, err = http.NewRequest("GET", pasteURL.Path, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	req = mux.SetURLVars(req, map[string]string{"key": pasteURL.Path[1:]})
+	rr = httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusTemporaryRedirect)
+	checkLocationHeader(t, rr, "https://example.com#fragment")
+}
+
+func TestIssue53(t *testing.T) {
+	srv, rl := createTemporaryRouter(t)
+
+	// Put a URL with a fragment identifier into the database.
+	var body bytes.Buffer
+	form := multipart.NewWriter(&body)
+	if _, err := form.CreateFormFile("file", "../directory-traversal/file.txt"); err != nil {
+		t.Fatal(err)
+	}
+	form.Close()
+	req, err := http.NewRequest("POST", "/", bytes.NewReader(body.Bytes()))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req.Header.Add("Content-Type", form.FormDataContentType())
+	rr := httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusFound)
+
+	// Check that any attempt to do directory traversal has failed.
+	rl.db.Transaction(func(tx *db.Database) error {
+		fus, err := db.AllFileUploads(tx)
+		if err != nil {
+			t.Fatal(err)
+		}
+		for _, fu := range fus {
+			if strings.ContainsAny(fu.FileName, "/\\") {
+				t.Fatalf(fmt.Sprintf("found a slash in file name: %v", fu.FileName))
+			}
+		}
+		return nil
+	})
+}
+
+func TestIssue60(t *testing.T) {
+	srv, _ := createTemporaryRouter(t)
+
+	// Request a nonexistent static file
+	req, err := http.NewRequest("GET", "/css/nonexistent_file.css", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rr := httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusNotFound)
+}
+
+func TestIssue56(t *testing.T) {
+	srv, _ := createTemporaryRouter(t)
+
+	// Make a POST request with both a 'file' *and* a 'shorten' part.
+	var body bytes.Buffer
+	form := multipart.NewWriter(&body)
+	if _, err := form.CreateFormFile("file", "empty.txt"); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := form.CreateFormField("shorten"); err != nil {
+		t.Fatal(err)
+	}
+	form.Close()
+	req, err := http.NewRequest("POST", "/", bytes.NewReader(body.Bytes()))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req.Header.Add("Content-Type", form.FormDataContentType())
+	rr := httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusBadRequest)
+}
+
+func TestIssue68(t *testing.T) {
+	srv, _ := createTemporaryRouter(t)
+	originalURL := "https://example.com"
+
+	var body bytes.Buffer
+	form := multipart.NewWriter(&body)
+	form.WriteField("shorten", "https://example.com")
+	form.Close()
+	req, err := http.NewRequest("POST", "/", bytes.NewReader(body.Bytes()))
+	if err != nil {
+		t.Fatal(err)
+	}
+	req.Header.Add("Content-Type", form.FormDataContentType())
+	rr := httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusFound)
+	rawURL := strings.SplitN(rr.Body.String(), "\n", 2)[0]
+	pasteURL, err := url.Parse(rawURL)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Check if the no-redirect handler works properly.
+	req, err = http.NewRequest("GET", pasteURL.Path+"/nr", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	rr = httptest.NewRecorder()
+	srv.ServeHTTP(rr, req)
+	checkStatusCode(t, rr, http.StatusOK)
+	if rr.Body.String() != originalURL {
+		t.Errorf("incorrect URL = %v, want %v", rr.Body.String(), originalURL)
+	}
+}

internal/db/db.go

@@ -1,147 +1,74 @@
 package db
 
 import (
-	"fmt"
 	"log"
+	"os"
 	"time"
 
 	"github.com/pkg/errors"
+	"gorm.io/driver/postgres"
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
 
-	bolt "go.etcd.io/bbolt"
+const (
-
+	// EnvDatabaseDriver is the key for the 'database driver' environment variable.
-	gobmarsh "gitea.hashru.nl/dsprenkels/rushlink/pkg/gobmarsh"
+	EnvDatabaseDriver = "RUSHLINK_DATABASE_DRIVER"
+	// EnvDatabasePath is the key for the 'database path' environment variable.
+	EnvDatabasePath = "RUSHLINK_DATABASE_PATH"
+	// EnvPostgresURL is the key for the 'postgresql URL' environment variable.
+	EnvPostgresURL = "RUSHLINK_POSTGRES_URL"
+	// EnvFileStorePath is the key for the environment variable locating the file store.
+	EnvFileStorePath = "RUSHLINK_FILE_STORE_PATH"
 )
 
 // Database is the main rushlink database type.
 //
-// Open a database using DB.Open() and close it in the end using DB.Close().
+// Open a database using OpenDBFromEnvironment(). Closing is not necessary.
 // Only one instance of DB should exist in a program at any moment.
-type Database struct {
+type Database = gorm.DB
-	Bolt *bolt.DB
-}
 
-// CurrentMigrateVersion holds the current "migrate version".
+var (
-//
+	gormLogger logger.Interface = logger.New(log.New(os.Stdout, "\r\n", log.LstdFlags), logger.Config{
-// If we alter the database format, we bump this number and write a new
+		SlowThreshold: 50 * time.Millisecond,
-// database migration in migrate().
+		LogLevel:      logger.Warn,
-const CurrentMigrateVersion = 2
+		Colorful:      true,
+	})
+	gormConfig = gorm.Config{Logger: gormLogger, PrepareStmt: true}
+)
 
-// BucketConf holds the name for the "configuration" bucket.
+// OpenDBFromEnvironment tries to open an SQL database, described by
-//
+func OpenDBFromEnvironment() (*Database, error) {
-// This bucket holds the database version, secret site-wide keys, etc.
+	const envNotSetMsg = "%v environment variable is not set"
-const BucketConf = "conf"
 
-// BucketPastes holds the name for the pastes bucket.
+	driver, prs := os.LookupEnv(EnvDatabaseDriver)
-const BucketPastes = "pastes"
+	if !prs {
-
+		return nil, errors.Errorf(envNotSetMsg, EnvDatabaseDriver)
-// BucketFileUpload holds the name for the file-upload bucket.
-const BucketFileUpload = "fileUpload"
-
-// KeyMigrateVersion stores the current migration version. If this value is less than
-// CurrentMigrateVersion, the database has to be migrated.
-const KeyMigrateVersion = "migrate_version"
-
-// OpenDB opens a database file located at path.
-func OpenDB(path string) (*Database, error) {
-	if path == "" {
-		return nil, errors.New("database not set")
 	}
-
+	switch driver {
-	db, err := bolt.Open(path, 0666, &bolt.Options{Timeout: 1 * time.Second})
+	case "sqlite":
-	if err != nil {
+		path, prs := os.LookupEnv(EnvDatabasePath)
-		return nil, errors.Wrapf(err, "failed to open database at '%v'", path)
+		if !prs {
-	}
+			return nil, errors.Errorf(envNotSetMsg, EnvDatabasePath)
-	if err := db.Update(migrate); err != nil {
+		}
-		return nil, err
+		db, err := gorm.Open(sqlite.Open(path), &gormConfig)
-	}
-	return &Database{db}, nil
-}
-
-// Close the bolt database
-func (db *Database) Close() error {
-	if db == nil {
-		panic("no open database")
-	}
-	return db.Close()
-}
-
-// Initialize and migrate the database to the current version
-func migrate(tx *bolt.Tx) error {
-	dbVersion, err := dbVersion(tx)
-	if err != nil {
-		return err
-	}
-
-	// Migrate the database to version 1
-	if dbVersion < 1 {
-		log.Println("migrating database to version 1")
-		// Create conf bucket
-		_, err := tx.CreateBucket([]byte(BucketConf))
 		if err != nil {
-			return err
+			return nil, err
 		}
-		// Create paste bucket
+		return db, nil
-		_, err = tx.CreateBucket([]byte(BucketPastes))
+	case "postgres":
+		dsn, prs := os.LookupEnv(EnvPostgresURL)
+		if !prs {
+			return nil, errors.Errorf(envNotSetMsg, EnvPostgresURL)
+		}
+		db, err := gorm.Open(postgres.Open(dsn), &gormConfig)
 		if err != nil {
-			return err
+			return nil, err
-		}
-		// Update the version number
-		if err := setDBVersion(tx, 1); err != nil {
-			return err
 		}
+		return db, nil
+	default:
+		return nil, errors.Errorf("RUSHLINK_DATABASE_DRIVER should be either 'sqlite' or 'postgres' (not '%v'), "+
+			"for more info see <https://stackoverflow.com/q/3582552/5207081>", driver)
 	}
-
-	if dbVersion < 2 {
-		log.Println("migrating database to version 2")
-		// Create fileUpload bucket
-		_, err := tx.CreateBucket([]byte(BucketFileUpload))
-		if err != nil {
-			return err
-		}
-		// Update the version number
-		if err := setDBVersion(tx, 2); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
-// Get the current migrate version from the database
-func dbVersion(tx *bolt.Tx) (int, error) {
-	conf := tx.Bucket([]byte(BucketConf))
-	if conf == nil {
-		return 0, nil
-	}
-	dbVersionBytes := conf.Get([]byte(KeyMigrateVersion))
-	if dbVersionBytes == nil {
-		return 0, nil
-	}
-
-	// Version was already stored
-	var dbVersion int
-	if err := gobmarsh.Unmarshal(dbVersionBytes, &dbVersion); err != nil {
-		return 0, err
-	}
-	if dbVersion == 0 {
-		return 0, fmt.Errorf("database version is invalid (%v)", dbVersion)
-	}
-	if dbVersion > CurrentMigrateVersion {
-		return 0, fmt.Errorf("database version is too recent (%v > %v)", dbVersion, CurrentMigrateVersion)
-	}
-	return dbVersion, nil
-}
-
-// Update the current migrate version in the database
-func setDBVersion(tx *bolt.Tx, version int) error {
-	conf, err := tx.CreateBucketIfNotExists([]byte(BucketConf))
-	if err != nil {
-		return err
-	}
-
-	versionBytes, err := gobmarsh.Marshal(version)
-	if err != nil {
-		return err
-	}
-	return conf.Put([]byte(KeyMigrateVersion), versionBytes)
 }

internal/db/fileupload.go

@@ -1,18 +1,20 @@
 package db
 
 import (
+	"bytes"
 	"encoding/hex"
 	"hash/crc32"
 	"io"
+	"net/http"
 	"net/url"
 	"os"
 	"path"
+	"path/filepath"
+	"time"
 
 	"github.com/google/uuid"
 	"github.com/pkg/errors"
-	bolt "go.etcd.io/bbolt"
+	"gorm.io/gorm"
-
-	gobmarsh "gitea.hashru.nl/dsprenkels/rushlink/pkg/gobmarsh"
 )
 
 // Use the Castagnoli checksum because of the acceleration on Intel CPUs
@@ -28,11 +30,29 @@ type FileUploadState int
 
 // FileUpload models an uploaded file.
 type FileUpload struct {
-	State       FileUploadState
+	ID uint `gorm:"primaryKey"`
-	ID          uuid.UUID
+
-	FileName    string
+	// State of the FileUpload (present/deleted/etc).
+	State FileUploadState `gorm:"index"`
+
+	// UUID publically identifies this FileUpload.
+	PubID uuid.UUID `gorm:"uniqueIndex"`
+
+	// FileName contains the original filename of this FileUpload.
+	FileName string
+
+	// Content type as determined by http.DetectContentType.
 	ContentType string
-	Checksum    uint32
+
+	// Checksum holds a crc32c checksum of the file.
+	//
+	// This checksum is only meant to allow for the detection of random
+	// database corruption.
+	Checksum uint32
+
+	CreatedAt time.Time
+	UpdatedAt time.Time
+	DeletedAt gorm.DeletedAt
 }
 
 const (
@@ -62,6 +82,19 @@ func (t FileUploadState) String() string {
 	}
 }
 
+// ErrFileUploadDoesNotExist occurs when a key does not exist in the database.
+var ErrFileUploadDoesNotExist = errors.New("file not found in the database")
+
+// OpenFileStoreFromEnvironment tries to open a file store located at ${RUSHLINK_FILE_STORE_PATH}.
+func OpenFileStoreFromEnvironment() (*FileStore, error) {
+	path, prs := os.LookupEnv(EnvFileStorePath)
+	if !prs {
+		err := errors.Errorf("%v environment variable is not set", EnvFileStorePath)
+		return nil, errors.Wrap(err, "opening file store")
+	}
+	return OpenFileStore(path)
+}
+
 // OpenFileStore opens the file storage at path.
 func OpenFileStore(path string) (*FileStore, error) {
 	if path == "" {
@@ -76,14 +109,43 @@ func OpenFileStore(path string) (*FileStore, error) {
 	return &FileStore{path[:]}, nil
 }
 
+// Path returns the path of the FileStore root.
+func (fs *FileStore) Path() string {
+	return fs.path
+}
+
+// filePath resolves the path of a file in the FileStore given some id and filename.
+func (fs *FileStore) filePath(pubID uuid.UUID, fileName string) string {
+	if fs.path == "" {
+		panic("fileStoreDir called while the file store path has not been set")
+	}
+	return path.Join(fs.path, hex.EncodeToString(pubID[:]), fileName)
+}
+
 // NewFileUpload creates a new FileUpload object.
-func NewFileUpload(fs *FileStore, r io.Reader, fileName string, contentType string) (*FileUpload, error) {
+//
-	id, err := uuid.NewRandom()
+// Internally, this function detects the type of the file stored in `r` using
+// `http.DetectContentType`.
+func NewFileUpload(fs *FileStore, r io.Reader, fileName string) (*FileUpload, error) {
+	// Generate a file ID
+	pubID, err := uuid.NewRandom()
 	if err != nil {
 		return nil, errors.Wrap(err, "generating UUID")
 	}
 
-	filePath := fs.FilePath(id, fileName)
+	// Construct a checksum for this file
+	hash := crc32.New(checksumTable)
+	tee := io.TeeReader(r, hash)
+
+	// Detect the file type
+	var tmpBuf bytes.Buffer
+	tmpBuf.Grow(512)
+	io.CopyN(&tmpBuf, tee, 512)
+	contentType := http.DetectContentType(tmpBuf.Bytes())
+
+	// Open the file on disk for writing
+	baseName := filepath.Base(fileName)
+	filePath := fs.filePath(pubID, baseName)
 	if err := os.Mkdir(path.Dir(filePath), dirMode); err != nil {
 		return nil, errors.Wrap(err, "creating file dir")
 	}
@@ -93,8 +155,11 @@ func NewFileUpload(fs *FileStore, r io.Reader, fileName string, contentType stri
 	}
 	defer file.Close()
 
-	hash := crc32.New(checksumTable)
+	// Write the file to disk
-	tee := io.TeeReader(r, hash)
+	_, err = io.Copy(file, &tmpBuf)
+	if err != nil {
+		return nil, errors.Wrap(err, "writing to file")
+	}
 	_, err = io.Copy(file, tee)
 	if err != nil {
 		return nil, errors.Wrap(err, "writing to file")
@@ -102,69 +167,50 @@ func NewFileUpload(fs *FileStore, r io.Reader, fileName string, contentType stri
 
 	fu := &FileUpload{
 		State:       FileUploadStatePresent,
-		ID:          id,
+		PubID:       pubID,
-		FileName:    fileName,
+		FileName:    baseName,
 		ContentType: contentType,
 		Checksum:    hash.Sum32(),
 	}
 	return fu, nil
 }
 
-func (fs *FileStore) Path() string {
+// GetFileUpload tries to retrieve a FileUpload object from the bolt database.
-	return fs.path
+func GetFileUpload(db *gorm.DB, pubID uuid.UUID) (*FileUpload, error) {
+	var fus []FileUpload
+	if err := db.Unscoped().Limit(1).Where("pub_id = ?", pubID).Find(&fus).Error; err != nil {
+		return nil, err
+	}
+	if len(fus) == 0 {
+		return nil, ErrFileUploadDoesNotExist
+	}
+	return &fus[0], nil
 }
 
-func (fs *FileStore) FilePath(id uuid.UUID, fileName string) string {
+// AllFileUploads tries to retrieve all FileUpload objects from the bolt database.
-	if fs.path == "" {
+func AllFileUploads(db *gorm.DB) ([]FileUpload, error) {
-		panic("fileStoreDir called while the file store path has not been set")
+	var fus []FileUpload
+	if err := db.Find(&fus).Error; err != nil {
+		return nil, err
 	}
-	return path.Join(fs.path, hex.EncodeToString(id[:]), fileName)
+	return fus, nil
-}
-
-func GetFileUpload(tx *bolt.Tx, id uuid.UUID) (*FileUpload, error) {
-	bucket := tx.Bucket([]byte(BucketFileUpload))
-	if bucket == nil {
-		return nil, errors.Errorf("bucket %v does not exist", BucketFileUpload)
-	}
-	storedBytes := bucket.Get(id[:])
-	if storedBytes == nil {
-		return nil, nil
-	}
-	fu := &FileUpload{}
-	err := gobmarsh.Unmarshal(storedBytes, fu)
-	return fu, err
 }
 
 // Save saves a FileUpload in the database.
-func (fu *FileUpload) Save(tx *bolt.Tx) error {
+func (fu *FileUpload) Save(db *gorm.DB) error {
-	bucket := tx.Bucket([]byte(BucketFileUpload))
+	return db.Save(fu).Error
-	if bucket == nil {
-		return errors.Errorf("bucket %v does not exist", BucketFileUpload)
-	}
-
-	buf, err := gobmarsh.Marshal(fu)
-	if err != nil {
-		return errors.Wrap(err, "encoding for database failed")
-	}
-	if err := bucket.Put(fu.ID[:], buf); err != nil {
-		return errors.Wrap(err, "database transaction failed")
-	}
-	return nil
 }
 
 // Delete deletes a FileUpload from the database.
-func (fu *FileUpload) Delete(tx *bolt.Tx, fs *FileStore) error {
+func (fu *FileUpload) Delete(db *gorm.DB, fs *FileStore) error {
 	// Remove the file in the backend
-	filePath := fs.FilePath(fu.ID, fu.FileName)
+	filePath := fu.Path(fs)
 	if err := os.Remove(filePath); err != nil {
 		return err
 	}
 
 	// Update the file in the server
-	if err := (&FileUpload{
+	if err := db.Delete(fu).Error; err != nil {
-		ID:    fu.ID,
-		State: FileUploadStateDeleted,
-	}).Save(tx); err != nil {
 		return err
 	}
 
@@ -173,12 +219,22 @@ func (fu *FileUpload) Delete(tx *bolt.Tx, fs *FileStore) error {
 	return errors.Wrap(os.Remove(path.Dir(filePath)), wrap)
 }
 
+// Path returns the path to this FileUpload in the FileStore provided in fs.
+func (fu *FileUpload) Path(fs *FileStore) string {
+	return fs.filePath(fu.PubID, fu.FileName)
+}
+
 // URL returns the URL for the FileUpload.
 func (fu *FileUpload) URL() *url.URL {
-	rawurl := "/uploads/" + hex.EncodeToString(fu.ID[:]) + "/" + fu.FileName
+	rawurl := "/uploads/" + hex.EncodeToString(fu.PubID[:]) + "/" + fu.FileName
 	urlParse, err := url.Parse(rawurl)
 	if err != nil {
 		panic("could not construct /uploads/ url")
 	}
 	return urlParse
 }
+
+// Ext returns the extension of the file attached to this FileUpload.
+func (fu *FileUpload) Ext() string {
+	return filepath.Ext(fu.FileName)
+}

internal/db/migrate.go

@@ -0,0 +1,46 @@
+package db
+
+import (
+	"time"
+
+	gormigrate "github.com/go-gormigrate/gormigrate/v2"
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// Gormigrate returns a Gormigrate migrator for the database.
+func Gormigrate(db *gorm.DB) *gormigrate.Gormigrate {
+	return gormigrate.New(db, gormigrate.DefaultOptions, []*gormigrate.Migration{
+		{
+			ID: "202010251337",
+			Migrate: func(tx *gorm.DB) error {
+				type FileUpload struct {
+					ID          uint            `gorm:"primaryKey"`
+					State       FileUploadState `gorm:"index"`
+					PubID       uuid.UUID       `gorm:"uniqueIndex"`
+					FileName    string
+					ContentType string
+					Checksum    uint32
+					CreatedAt   time.Time
+					UpdatedAt   time.Time
+					DeletedAt   gorm.DeletedAt
+				}
+				type Paste struct {
+					ID          uint       `gorm:"primaryKey"`
+					Type        PasteType  `gorm:"index"`
+					State       PasteState `gorm:"index"`
+					Content     []byte
+					Key         string `gorm:"uniqueIndex"`
+					DeleteToken string
+					CreatedAt   time.Time
+					UpdatedAt   time.Time
+					DeletedAt   gorm.DeletedAt
+				}
+				return tx.AutoMigrate(&FileUpload{}, &Paste{})
+			},
+			Rollback: func(tx *gorm.DB) error {
+				return tx.Migrator().DropTable(&FileUpload{}, &Paste{})
+			},
+		},
+	})
+}

internal/db/paste.go

@@ -2,31 +2,37 @@ package db
 
 import (
 	"crypto/rand"
-	"encoding/base64"
 	"encoding/hex"
+	"net/http"
 	"net/url"
 	"strings"
 	"time"
 
-	gobmarsh "gitea.hashru.nl/dsprenkels/rushlink/pkg/gobmarsh"
 	"github.com/google/uuid"
 	"github.com/pkg/errors"
-	bolt "go.etcd.io/bbolt"
+	"gorm.io/gorm"
 )
 
+// PasteType describes the type of Paste (i.e. file, redirect, [...]).
 type PasteType int
+
+// PasteState describes the state of a Paste (i.e. present, deleted, [...]).
 type PasteState int
 
+// Paste describes the main Paste model in the database.
 type Paste struct {
-	Type        PasteType
+	ID          uint       `gorm:"primaryKey"`
-	State       PasteState
+	Type        PasteType  `gorm:"index"`
+	State       PasteState `gorm:"index"`
 	Content     []byte
-	Key         string
+	Key         string `gorm:"uniqueIndex"`
 	DeleteToken string
-	TimeCreated time.Time
+	CreatedAt   time.Time
+	UpdatedAt   time.Time
+	DeletedAt   gorm.DeletedAt
 }
 
-// ReservedPasteKeys keys are designated reserved, and will not be randomly chosen
+// ReservedPasteKeys keys are designated reserved, and will not be randomly chosen.
 var ReservedPasteKeys = []string{"xd42", "example"}
 
 // Note: we use iota here. That means removals of PasteType* are not allowed,
@@ -35,6 +41,8 @@ var ReservedPasteKeys = []string{"xd42", "example"}
 // allowed at the bottom of this block, for the same reason.
 const (
 	PasteTypeUndef PasteType = iota
+	// PasteTypePaste is as of yet unused.  It is still unclear if this type
+	// will ever get a proper meaning.
 	PasteTypePaste
 	PasteTypeRedirect
 	PasteTypeFileUpload
@@ -47,9 +55,33 @@ const (
 	PasteStateDeleted
 )
 
+// minKeyLen specifies the mimimum length of a paste key.
+const minKeyLen = 4
+
+var (
+	// ErrKeyInvalidChar occurs when a key contains an invalid character.
+	ErrKeyInvalidChar = errors.New("invalid character in key")
+	// ErrKeyInvalidLength occurs when a key embeds a length that is incorrect.
+	ErrKeyInvalidLength = errors.New("key length encoding is incorrect")
+	// ErrPasteDoesNotExist occurs when a key does not exist in the database.
+	ErrPasteDoesNotExist = errors.New("url key not found in the database")
+)
+
+// ErrHTTPStatusCode returns the HTTP status code that should correspond to
+// the provided error.
+// server error, or false if it is not.
+func ErrHTTPStatusCode(err error) int {
+	switch err {
+	case nil:
+		return 0
+	case gorm.ErrRecordNotFound, ErrKeyInvalidChar, ErrKeyInvalidLength, ErrPasteDoesNotExist:
+		return http.StatusNotFound
+	}
+	return http.StatusInternalServerError
+}
+
 // Base64 encoding and decoding
 var base64Alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_"
-var base64Encoder = base64.RawURLEncoding.WithPadding(base64.NoPadding)
 
 func (t PasteType) String() string {
 	switch t {
@@ -80,57 +112,80 @@ func (t PasteState) String() string {
 }
 
 // GetPaste retrieves a paste from the database.
-func GetPaste(tx *bolt.Tx, key string) (*Paste, error) {
+func GetPaste(db *gorm.DB, key string) (*Paste, error) {
-	pastesBucket := tx.Bucket([]byte(BucketPastes))
+	if err := ValidatePasteKey(key); err != nil {
-	if pastesBucket == nil {
+		return nil, err
-		return nil, errors.Errorf("bucket %v does not exist", BucketPastes)
 	}
-	storedBytes := pastesBucket.Get([]byte(key))
+	return GetPasteNoValidate(db, key)
-	if storedBytes == nil {
-		return nil, nil
-	}
-	p := &Paste{}
-	err := gobmarsh.Unmarshal(storedBytes, p)
-	return p, err
 }
 
-func (p *Paste) Save(tx *bolt.Tx) error {
+// ValidatePasteKey validates the format of the key that has
-	bucket := tx.Bucket([]byte(BucketPastes))
+func ValidatePasteKey(key string) error {
-	if bucket == nil {
+	internalLen := minKeyLen
-		return errors.Errorf("bucket %v does not exist", BucketPastes)
+	countingOnes := true
+	for _, ch := range key {
+		limb := strings.IndexRune(base64Alphabet, ch)
+		if limb == -1 {
+			return ErrKeyInvalidChar
+		}
+		for i := 5; i >= 0 && countingOnes; i-- {
+			if (limb>>uint(i))&0x1 == 0 {
+				countingOnes = false
+				break
+			}
+			internalLen++
+		}
 	}
-
+	if internalLen != len(key) {
-	buf, err := gobmarsh.Marshal(p)
+		return ErrKeyInvalidLength
-	if err != nil {
-		return errors.Wrap(err, "encoding for database failed")
-	}
-	if err := bucket.Put([]byte(p.Key), buf); err != nil {
-		return errors.Wrap(err, "database transaction failed")
 	}
 	return nil
 }
 
-func (p *Paste) Delete(tx *bolt.Tx, fs *FileStore) error {
+// GetPasteNoValidate retrieves a paste from the database without validating
+// the key format first.
+func GetPasteNoValidate(db *gorm.DB, key string) (*Paste, error) {
+	var ps []Paste
+	if err := db.Unscoped().Limit(1).Where("key = ?", key).Find(&ps).Error; err != nil {
+		return nil, err
+	}
+	if len(ps) == 0 {
+		return nil, ErrPasteDoesNotExist
+	}
+	return &ps[0], nil
+}
+
+// Save saves this Paste to the database.
+func (p *Paste) Save(db *gorm.DB) error {
+	return db.Save(p).Error
+}
+
+// Delete deletes this Paste from the database.
+func (p *Paste) Delete(db *gorm.DB, fs *FileStore) error {
 	// Remove the (maybe) attached file
 	if p.Type == PasteTypeFileUpload {
 		fuID, err := uuid.FromBytes(p.Content)
 		if err != nil {
 			return errors.Wrap(err, "failed to parse uuid")
 		}
-		fu, err := GetFileUpload(tx, fuID)
+		fu, err := GetFileUpload(db, fuID)
 		if err != nil {
 			return errors.Wrap(err, "failed to find file in database")
 		}
-		if err := fu.Delete(tx, fs); err != nil {
+		if err := fu.Delete(db, fs); err != nil {
 			return errors.Wrap(err, "failed to remove file")
 		}
 	}
 
-	// Replace the old paste with a new empty paste
+	// Wipe the old paste
 	p.Type = PasteTypeUndef
 	p.State = PasteStateDeleted
 	p.Content = []byte{}
-	if err := p.Save(tx); err != nil {
+	if err := db.Save(&p).Error; err != nil {
+		return errors.Wrap(err, "failed to wipe paste in database")
+	}
+	// Soft-delete the paste as well
+	if err := db.Delete(&p).Error; err != nil {
 		return errors.Wrap(err, "failed to delete paste in database")
 	}
 	return nil
@@ -152,28 +207,28 @@ func (p *Paste) RedirectURL() *url.URL {
 	return urlParse
 }
 
-// GeneratePasteKey generates a key until it is not in the database, the
+// GeneratePasteKey generates a new paste key. It will ensure that the newly
-// running time of this function is in O(log N), where N is the amount of
+// generated paste key does not already exist in the database.
+// The running time of this function is in O(log N), where N is the amount of
 // keys stored in the url-shorten database.
-func GeneratePasteKey(tx *bolt.Tx) (string, error) {
+// In tx, a Bolt transaction is given. Use minimumEntropy to set the mimimum
-	pastesBucket := tx.Bucket([]byte(BucketPastes))
+// guessing entropy of the generated key.
-	if pastesBucket == nil {
+func GeneratePasteKey(db *gorm.DB, minimumEntropy int) (string, error) {
-		return "", errors.Errorf("bucket %v does not exist", BucketPastes)
-	}
-
 	epoch := 0
 	var key string
 	for {
 		var err error
-		key, err = generatePasteKeyInner(epoch)
+		key, err = generatePasteKeyInner(epoch, minimumEntropy)
 		if err != nil {
 			return "", errors.Wrap(err, "url-key generation failed")
 		}
 
-		found := pastesBucket.Get([]byte(key))
+		var count int64
-		if found == nil {
+		db.Unscoped().Model(&Paste{}).Where("key = ?", []byte(key)).Count(&count)
-			break
+		if err != nil {
+			return "", errors.Wrap(err, "failed to check if key already exists")
 		}
+		alreadyInUse := count != 0
 
 		isReserved := false
 		for _, reservedKey := range ReservedPasteKeys {
@@ -182,17 +237,30 @@ func GeneratePasteKey(tx *bolt.Tx) (string, error) {
 				break
 			}
 		}
-		if !isReserved {
+		if !alreadyInUse && !isReserved {
 			break
 		}
-
 		epoch++
 	}
 	return key, nil
 }
 
-func generatePasteKeyInner(epoch int) (string, error) {
+// generatePasteKeyInner generates a new paste key, but leaves the
-	urlKey := make([]byte, 4+epoch)
+// uniqueness and is-reserved checks to the caller. That is, it only
+// generates a random key in the correct (syntactical) format.
+// Both epoch and entropy can be used to set the key length. Epoch is used
+// to prevent collisions in retrying to generate new keys. Entropy (in bits)
+// is used to ensure that a new key has at least some amount of guessing
+// entropy.
+func generatePasteKeyInner(epoch, entropy int) (string, error) {
+	entropyEpoch := entropy
+	entropyEpoch -= minKeyLen * 6         // First 4 characters provide 24 bits.
+	entropyEpoch++                        // One bit less because of '0' bit.
+	entropyEpoch = (entropyEpoch-1)/5 + 1 // 5 bits for every added epoch.
+	if epoch < entropyEpoch {
+		epoch = entropyEpoch
+	}
+	urlKey := make([]byte, minKeyLen+epoch)
 	_, err := rand.Read(urlKey)
 	if err != nil {
 		return "", err
@@ -226,6 +294,7 @@ func generatePasteKeyInner(epoch int) (string, error) {
 	return string(urlKey), nil
 }
 
+// GenerateDeleteToken generates a new (random) delete token.
 func GenerateDeleteToken() (string, error) {
 	var deleteToken [16]byte
 	_, err := rand.Read(deleteToken[:])

internal/db/paste_test.go

@@ -0,0 +1,100 @@
+package db
+
+import (
+	"testing"
+	"testing/quick"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func OpenTemporaryDB() (*Database, error) {
+	db, err := gorm.Open(sqlite.Open(":memory:"), &gormConfig)
+	if err != nil {
+		return nil, err
+	}
+	migrate := Gormigrate(db)
+	if err := migrate.Migrate(); err != nil {
+		return nil, err
+	}
+	return db, nil
+}
+
+func TestValidatePasteKey(t *testing.T) {
+	tests := []struct {
+		key     string
+		wantErr bool
+		errKind error
+	}{
+		{"xd42__", false, nil},
+		{"xd42_*", true, ErrKeyInvalidChar},
+		{"xd42_/", true, ErrKeyInvalidChar},
+		{"xd42_=", true, ErrKeyInvalidChar},
+		{"xd42_", true, ErrKeyInvalidLength},
+		{"xd42", true, ErrKeyInvalidLength},
+		{"xd4", true, ErrKeyInvalidLength},
+		{"xd", true, ErrKeyInvalidLength},
+		{"x", true, ErrKeyInvalidLength},
+		{"", true, ErrKeyInvalidLength},
+
+		{"KoJ5", false, nil},
+
+		{"__dGSJIIbBpr-SD0", false, nil},
+		{"__dGSJIIbBpr-SD", true, ErrKeyInvalidLength},
+	}
+	for _, tt := range tests {
+		t.Run(tt.key, func(t *testing.T) {
+			err := ValidatePasteKey(tt.key)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ValidatePasteKey() got error = %v, want error %v", err != nil, tt.wantErr)
+			}
+			if (err != nil) && err != tt.errKind {
+				t.Errorf("ValidatePasteKey() error = %v, want errKind %v", err, tt.errKind)
+			}
+		})
+	}
+}
+
+func TestGeneratedKeysAreValid(t *testing.T) {
+	db, err := OpenTemporaryDB()
+	if err != nil {
+		t.Error(err)
+	}
+	var minimumEntropy int
+	checkGeneratedKeyValid := func() bool {
+		key, err := GeneratePasteKey(db, minimumEntropy)
+		if err != nil {
+			return false
+		}
+		return ValidatePasteKey(key) == nil
+	}
+
+	for minimumEntropy = 0; minimumEntropy <= 80; minimumEntropy++ {
+		if err = quick.Check(checkGeneratedKeyValid, nil); err != nil {
+			t.Error(err)
+		}
+	}
+}
+
+func TestTruncatedKeysAreInvalid(t *testing.T) {
+	db, err := OpenTemporaryDB()
+	if err != nil {
+		t.Error(err)
+	}
+	var minimumEntropy int
+	checkTruncatedKeysInvalid := func(truncRand uint) bool {
+		key, err := GeneratePasteKey(db, minimumEntropy)
+		if err != nil {
+			return false
+		}
+		trunc := int(truncRand % uint(len(key)-1))
+		key = key[:trunc]
+		return ValidatePasteKey(key) == ErrKeyInvalidLength
+	}
+
+	for minimumEntropy = 0; minimumEntropy <= 80; minimumEntropy++ {
+		if err = quick.Check(checkTruncatedKeysInvalid, nil); err != nil {
+			t.Error(err)
+		}
+	}
+}

metrics.go

@@ -6,41 +6,67 @@ import (
 	"time"
 
 	"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
-
 	"github.com/gorilla/mux"
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
-	"github.com/prometheus/client_golang/prometheus/promauto"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	bolt "go.etcd.io/bbolt"
 )
 
-func StartMetricsServer(addr string, db *db.Database) {
+const metricNamespace = "rushlink"
-	var (
+
-		_ = promauto.NewGaugeFunc(prometheus.GaugeOpts{
+// metricURLsTotalGauge counts the number of requests that are handled by
-			Namespace: "rushlink",
+// the application, partitioned by status code and HTTP method.
-			Subsystem: "pastes",
+//
-			Name:      "urls_total",
+// This counter is updated by the router.
-			Help:      "The current amount of pastes in the database.",
+var metricRequestsTotalCounter = prometheus.NewCounterVec(
-		}, func() float64 {
+	prometheus.CounterOpts{
-			var metric float64
+		Namespace: metricNamespace,
-			if err := db.Bolt.View(func(tx *bolt.Tx) error {
+		Subsystem: "http",
-				bucket := tx.Bucket([]byte("pastes"))
+		Name:      "requests_total",
-				if bucket == nil {
+		Help:      "How many HTTP requests processed, partitioned by status code and HTTP method.",
-					return errors.New("bucket 'pastes' could not be found")
+	}, []string{"code", "method"})
-				}
+
-				metric = float64(bucket.Stats().KeyN)
+// metricRequestsLatencyNanoSeconds keeps track of the request latencies for
-				return nil
+// each http request.
-			}); err != nil {
+//
-				log.Printf("error: %v", errors.Wrap(err, "fetching pastes_total metric"))
+// This historogram is updated by the router.
-				return 0
+var metricRequestsLatencyNanoSeconds = prometheus.NewHistogramVec(
-			}
+	prometheus.HistogramOpts{
-			return metric
+		Namespace: metricNamespace,
-		})
+		Subsystem: "http",
-	)
+		Name:      "request_duration_seconds",
+		Buckets: []float64{
+			float64(500e-6),
+			float64(1e-3),
+			float64(2e-3),
+			float64(5e-3),
+			float64(10e-3),
+			float64(20e-3),
+			float64(50e-3),
+		},
+		Help: "The latency of each HTTP request, partitioned by status code and HTTP method.",
+	}, []string{"code", "method"})
+
+// metricURLsTotalGauge measures the amount of pastes stored in the database,
+// partitioned by type and state.
+//
+// Its values are computed on the fly by updateMetrics().
+var metricURLsTotalGauge = prometheus.NewGaugeVec(
+	prometheus.GaugeOpts{
+		Namespace: metricNamespace,
+		Subsystem: "pastes",
+		Name:      "urls_total",
+		Help:      "The current amount of pastes in the database, partitioned by state and type.",
+	}, []string{"state", "type"})
+
+// StartMetricsServer starts sering Prometheus metrics exports on addr
+func StartMetricsServer(addr string, database *db.Database, fs *db.FileStore) {
+	prometheus.MustRegister(metricRequestsTotalCounter)
+	prometheus.MustRegister(metricRequestsLatencyNanoSeconds)
+	prometheus.MustRegister(metricURLsTotalGauge)
 
 	router := mux.NewRouter()
-	router.Handle("/metrics", promhttp.Handler()).Methods("GET")
+	router.Handle("/metrics", &MetricsHandler{database}).Methods("GET")
 	srv := &http.Server{
 		Handler:      router,
 		Addr:         addr,
@@ -49,3 +75,34 @@ func StartMetricsServer(addr string, db *db.Database) {
 	}
 	log.Fatal(srv.ListenAndServe())
 }
+
+type MetricsHandler struct {
+	db *db.Database
+}
+
+func (mh *MetricsHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
+	mh.updateMetrics()
+	promhttp.Handler().ServeHTTP(w, r)
+}
+
+func (mh *MetricsHandler) updateMetrics() {
+	// Update metricURLsTotalGauge
+	results := make([](struct {
+		Type  db.PasteType
+		State db.PasteState
+		Count float64
+	}), 0)
+	query := mh.db.Unscoped().Model(&db.Paste{}).Select("type", "state", "COUNT(*) as count").Group("type, state").Find(&results)
+	if err := query.Error; err != nil {
+		log.Printf("error: %v", errors.Wrap(err, "fetching pastes_total metric"))
+		return
+	}
+	metricURLsTotalGauge.Reset()
+	for _, r := range results {
+		labels := map[string]string{
+			"type":  r.Type.String(),
+			"state": r.State.String(),
+		}
+		metricURLsTotalGauge.With(labels).Set(r.Count)
+	}
+}

router.go

@@ -4,56 +4,140 @@ import (
 	"fmt"
 	"log"
 	"net/http"
+	"net/url"
 	"runtime/debug"
+	"strconv"
 	"time"
 
 	"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
 	"github.com/gorilla/mux"
+	"github.com/pkg/errors"
 )
 
+const staticFilenameExpr = "[A-Za-z0-9-_.]+"
+const urlKeyExpr = "{key:[A-Za-z0-9-_]{4,}}"
+const urlKeyWithExtExpr = urlKeyExpr + "{ext:\\.[A-Za-z0-9-_]+}"
+
 type rushlink struct {
-	db *db.Database
+	db      *db.Database
-	fs *db.FileStore
+	fs      *db.FileStore
+	rootURL *url.URL
 }
 
-func recoveryMiddleware(next http.Handler) http.Handler {
+func (rl *rushlink) RootURL() *url.URL {
+	return rl.rootURL
+}
+
+func (rl *rushlink) recoveryMiddleware(next http.Handler) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		logRequestInfo := func() {
+			log.Printf("in request: %v - %v %q %v", r.RemoteAddr, r.Method, r.RequestURI, r.Proto)
+		}
 		defer func() {
 			defer func() {
 				if err := recover(); err != nil {
+					w.WriteHeader(500)
 					log.Printf("error: panic while recovering from another panic: %v\n", err)
+					logRequestInfo()
 					debug.PrintStack()
 					fmt.Fprintf(w, "internal server error: %v\n", err)
 				}
 			}()
 
 			if err := recover(); err != nil {
+				w.WriteHeader(500)
 				log.Printf("error: %v\n", err)
+				logRequestInfo()
 				debug.PrintStack()
-				renderInternalServerError(w, r, err)
+				rl.renderInternalServerError(w, r, err)
 			}
 		}()
 		next.ServeHTTP(w, r)
 	})
 }
 
-func StartMainServer(addr string, db *db.Database, fs *db.FileStore) {
+func (rl *rushlink) metricsMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		tick := time.Now()
+		srw := statusResponseWriter{Inner: w}
+		next.ServeHTTP(&srw, r)
+		tock := time.Now()
+
+		status := strconv.Itoa(srw.StatusCode)
+		labels := map[string]string{"code": status, "method": r.Method}
+		// Update requests counter metric
+		metricRequestsTotalCounter.With(labels).Inc()
+		// Update request latency metric
+		elapsed := tock.Sub(tick)
+		metricRequestsLatencyNanoSeconds.With(labels).Observe(elapsed.Seconds())
+	})
+}
+
+type statusResponseWriter struct {
+	Inner      http.ResponseWriter
+	StatusCode int
+}
+
+func (w *statusResponseWriter) Header() http.Header {
+	return w.Inner.Header()
+}
+
+func (w *statusResponseWriter) Write(buf []byte) (int, error) {
+	if w.StatusCode == 0 {
+		w.WriteHeader(http.StatusOK)
+	}
+	return w.Inner.Write(buf)
+}
+
+func (w *statusResponseWriter) WriteHeader(statusCode int) {
+	w.StatusCode = statusCode
+	w.Inner.WriteHeader(statusCode)
+}
+
+// InitMainRouter creates the main Gorilla router for the application.
+//
+// This function will not populate the  router with an error-recovery and
+// metrics-reporting middleware. If these middleware are required, then the
+// caller should encapsulate this router inside of another router and register
+// the middlewares on the encapsulating router.
+func InitMainRouter(r *mux.Router, rl *rushlink) {
+	r.HandleFunc("/{path:img/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
+	r.HandleFunc("/{path:css/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
+	r.HandleFunc("/{path:js/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
+	r.HandleFunc("/", rl.indexGetHandler).Methods("GET", "HEAD")
+	r.HandleFunc("/", rl.newPasteHandler).Methods("POST")
+	r.HandleFunc("/"+urlKeyExpr, rl.viewPasteHandler).Methods("GET", "HEAD")
+	r.HandleFunc("/"+urlKeyWithExtExpr, rl.viewPasteHandler).Methods("GET", "HEAD")
+	r.HandleFunc("/"+urlKeyExpr+"/nr", rl.viewPasteHandlerNoRedirect).Methods("GET", "HEAD")
+	r.HandleFunc("/"+urlKeyWithExtExpr+"/nr", rl.viewPasteHandlerNoRedirect).Methods("GET", "HEAD")
+	r.HandleFunc("/"+urlKeyExpr+"/meta", rl.viewPasteHandlerMeta).Methods("GET", "HEAD")
+	r.HandleFunc("/"+urlKeyWithExtExpr+"/meta", rl.viewPasteHandlerMeta).Methods("GET", "HEAD")
+	r.HandleFunc("/"+urlKeyExpr, rl.deletePasteHandler).Methods("DELETE")
+	r.HandleFunc("/"+urlKeyWithExtExpr, rl.deletePasteHandler).Methods("DELETE")
+	r.HandleFunc("/"+urlKeyExpr+"/delete", rl.deletePasteHandler).Methods("POST")
+	r.HandleFunc("/"+urlKeyWithExtExpr+"/delete", rl.deletePasteHandler).Methods("POST")
+}
+
+// StartMainServer starts the main http server listening on addr.
+func StartMainServer(addr string, db *db.Database, fs *db.FileStore, rawRootURL string) {
+	var rootURL *url.URL
+	if rawRootURL != "" {
+		var err error
+		rootURL, err = url.Parse(rawRootURL)
+		if err != nil {
+			log.Fatalln(errors.Wrap(err, "could not parse rootURL flag"))
+		}
+	}
 	rl := rushlink{
-		db: db,
+		db:      db,
-		fs: fs,
+		fs:      fs,
+		rootURL: rootURL,
 	}
 
-	// Initialize Gorilla router
 	router := mux.NewRouter()
-	router.Use(recoveryMiddleware)
+	router.Use(rl.metricsMiddleware)
-	router.HandleFunc("/", rl.indexGetHandler).Methods("GET")
+	router.Use(rl.recoveryMiddleware)
-	router.HandleFunc("/", rl.newPasteHandler).Methods("POST")
+	InitMainRouter(router, &rl)
-	router.HandleFunc("/{key:[A-Za-z0-9-_]{4,}}", rl.viewPasteHandler).Methods("GET")
-	router.HandleFunc("/{key:[A-Za-z0-9-_]{4,}}/nr", rl.viewPasteHandlerNoRedirect).Methods("GET")
-	router.HandleFunc("/{key:[A-Za-z0-9-_]{4,}}/meta", rl.viewPasteHandlerMeta).Methods("GET")
-	router.HandleFunc("/{key:[A-Za-z0-9-_]{4,}}", rl.deletePasteHandler).Methods("DELETE")
-	router.HandleFunc("/{key:[A-Za-z0-9-_]{4,}}/delete", rl.deletePasteHandler).Methods("POST")
-	router.HandleFunc("/uploads/{id:[A-Za-z0-9-_]+}/{filename:.+}", rl.uploadFileGetHandler).Methods("GET")
 
 	srv := &http.Server{
 		Handler:      router,

views.go

@@ -16,17 +16,20 @@ import (
 	"strconv"
 	"strings"
 	text "text/template"
+	"time"
 
 	"github.com/pkg/errors"
 )
 
+const defaultScheme = "http"
+
 // Plain text templates
 var textBaseTemplate *text.Template = text.Must(text.New("").Parse(string(MustAsset("templates/txt/base.txt.tmpl"))))
 var htmlBaseTemplate *html.Template = html.Must(html.New("").Parse(string(MustAsset("templates/html/base.html.tmpl"))))
 
 // Template collections
-var textTemplates = make(map[string]*text.Template, 0)
+var textTemplates = make(map[string]*text.Template)
-var htmlTemplates = make(map[string]*html.Template, 0)
+var htmlTemplates = make(map[string]*html.Template)
 
 // Used by resolveResponseContentType
 var acceptHeaderMediaRangeRegex = regexp.MustCompile(`^\s*([^()<>@,;:\\"/\[\]?.=]+)/([^()<>@,;:\\"/\[\]?.=]+)\s*$`)
@@ -72,19 +75,37 @@ func mustMatch(pattern, name string) bool {
 	return m
 }
 
-func parseFail(tmplName string, err error) {
+func mapExtend(m map[string]interface{}, key string, value interface{}) {
-	panic(errors.Wrapf(err, "parsing of %v failed", tmplName))
+	if m[key] != nil {
+		return
+	}
+	m[key] = value
 }
 
-func render(w http.ResponseWriter, r *http.Request, tmplName string, data map[string]interface{}) {
+func (rl *rushlink) renderStatic(w http.ResponseWriter, r *http.Request, path string) {
+	var modTime time.Time
+	if info, err := AssetInfo(path); err == nil {
+		modTime = info.ModTime()
+	}
+	contents, err := Asset(path)
+	if err != nil {
+		rl.renderError(w, r, http.StatusNotFound, err.Error())
+		return
+	}
+	http.ServeContent(w, r, path, modTime, bytes.NewReader(contents))
+}
+
+func (rl *rushlink) render(w http.ResponseWriter, r *http.Request, status int, tmplName string, data map[string]interface{}) {
 	contentType, err := resolveResponseContentType(r, []string{"text/plain", "text/html"})
 	if err != nil {
 		w.WriteHeader(http.StatusNotAcceptable)
 		fmt.Fprintf(w, "error parsing Accept header: %v\n", err)
+		return
 	}
 
 	// Add the request to the template data
-	data["Request"] = r
+	mapExtend(data, "RootURL", rl.resolveRootURL(r))
+	mapExtend(data, "Request", r)
 
 	switch contentType {
 	case "text/plain":
@@ -94,7 +115,12 @@ func render(w http.ResponseWriter, r *http.Request, tmplName string, data map[st
 			err = fmt.Errorf("'%v' not in textTemplates", tmplName)
 			break
 		}
-		err = tmpl.Execute(w, data)
+		if status != 0 {
+			w.WriteHeader(status)
+		}
+		if r.Method != "HEAD" {
+			err = tmpl.Execute(w, data)
+		}
 	case "text/html":
 		w.Header().Set("Content-Type", "text/html")
 		tmpl := htmlTemplates[tmplName]
@@ -115,7 +141,12 @@ func render(w http.ResponseWriter, r *http.Request, tmplName string, data map[st
 			}
 			return buf.String()
 		}
-		err = tmpl.Execute(w, data)
+		if status != 0 {
+			w.WriteHeader(status)
+		}
+		if r.Method != "HEAD" {
+			err = tmpl.Execute(w, data)
+		}
 	default:
 		// Fall back to plain text without template
 		w.WriteHeader(http.StatusNotAcceptable)
@@ -127,14 +158,44 @@ func render(w http.ResponseWriter, r *http.Request, tmplName string, data map[st
 	}
 }
 
-func renderError(w http.ResponseWriter, r *http.Request, status int, msg string) {
+func (rl *rushlink) renderError(w http.ResponseWriter, r *http.Request, status int, msg string) {
-	w.WriteHeader(status)
+	rl.render(w, r, status, "error", map[string]interface{}{"Message": msg})
-	render(w, r, "error", map[string]interface{}{"Message": msg})
 }
 
-func renderInternalServerError(w http.ResponseWriter, r *http.Request, err interface{}) {
+func (rl *rushlink) renderInternalServerError(w http.ResponseWriter, r *http.Request, err interface{}) {
 	msg := fmt.Sprintf("internal server error: %v", err)
-	renderError(w, r, http.StatusInternalServerError, msg)
+	rl.renderError(w, r, http.StatusInternalServerError, msg)
+}
+
+// resolveRootURL constructs the `scheme://host` part of rushlinks public API.
+//
+// If the `--root_url` flag is set, it will return that URL.
+// Otherwise, this function will return 'https://{Host}', where `{Host}` is
+// the value provided by the client in the HTTP `Host` header.  This value may
+// be invalid, but it is impossible to handle this error (because we *cannot*
+// know the real host).
+func (rl *rushlink) resolveRootURL(r *http.Request) string {
+	rlHost := rl.RootURL()
+	if rlHost != nil {
+		// Root URL overridden by command line arguments
+		return rlHost.String()
+	}
+
+	// Guess scheme
+	scheme := defaultScheme
+	forwardedScheme := r.Header.Get("X-Forwarded-Proto")
+	switch forwardedScheme {
+	case "http":
+		scheme = "http"
+	case "https":
+		scheme = "https"
+	}
+	// Guess host
+	host := r.Host
+	if forwardedHost := r.Header.Get("X-Forwarded-Host"); forwardedHost != "" {
+		host = forwardedHost
+	}
+	return scheme + "://" + host
 }
 
 // Try to resolve the preferred content-type for the response to this request.
@@ -152,7 +213,7 @@ func resolveResponseContentType(r *http.Request, types []string) (string, error)
 	if len(types) == 0 {
 		return "", nil
 	}
-	acceptHeader := r.Header.Get("Accept")
+	acceptHeader := strings.TrimSpace(r.Header.Get("Accept"))
 	if acceptHeader == "" {
 		return types[0], nil
 	}
@@ -170,7 +231,7 @@ func resolveResponseContentType(r *http.Request, types []string) (string, error)
 		choiceParts := strings.Split(avString, ";")
 		mediaRange := acceptHeaderMediaRangeRegex.FindStringSubmatch(choiceParts[0])
 		if mediaRange == nil {
-			return "", fmt.Errorf("bad media-range (\"%v\")", choiceParts[0])
+			return "", fmt.Errorf("bad media-range ('%v')", choiceParts[0])
 		}
 		av.Type = mediaRange[1]
 		av.Subtype = mediaRange[2]
@@ -195,7 +256,7 @@ func resolveResponseContentType(r *http.Request, types []string) (string, error)
 			// Check if this parameter is still invalid in any case
 			acceptParams := acceptHeaderAcceptParamsRegex.FindStringSubmatchIndex(choiceParts[0])
 			if acceptParams == nil {
-				return "", fmt.Errorf("bad accept-params (\"%v\")", choiceParts[0])
+				return "", fmt.Errorf("bad accept-params ('%v')", choiceParts[0])
 			}
 		}
 		avs[i] = av

views_test.go

@@ -0,0 +1,54 @@
+package rushlink
+
+import (
+	"net/http"
+	"testing"
+)
+
+func resolveResponseContentTypeSuccess(t *testing.T, expected string, types []string, acceptVal string) {
+	r, err := http.NewRequest("HEAD", "", nil)
+	if err != nil {
+		panic(err)
+	}
+	r.Header.Set("Accept", acceptVal)
+	got, err := resolveResponseContentType(r, types)
+	if err != nil {
+		t.Errorf("error: '%v'\n", err)
+	}
+	if got != expected {
+		t.Errorf("error: '%v' should be '%v'\n", got, expected)
+	}
+}
+
+func resolveResponseContentTypeError(t *testing.T, expected string, types []string, acceptVal string) {
+	r, err := http.NewRequest("HEAD", "", nil)
+	if err != nil {
+		panic(err)
+	}
+	r.Header.Set("Accept", acceptVal)
+	got, err := resolveResponseContentType(r, types)
+	if err == nil {
+		t.Errorf("expected an error, but got a success: '%v'", got)
+	}
+	if got != "" {
+		t.Errorf("error: return value should be empty, not '%v'", got)
+	}
+	if err.Error() != expected {
+		t.Errorf("wrong error value error: got '%v', want '%v'\n", got, expected)
+	}
+}
+
+func TestResolveResponseContentType(t *testing.T) {
+	resolveResponseContentTypeSuccess(t, "", []string{}, "text/html")
+	resolveResponseContentTypeSuccess(t, "text/html", []string{"text/html"}, "")
+	resolveResponseContentTypeSuccess(t, "text/html", []string{"text/txt", "text/html"}, "text/txt;q=0.5,text/html")
+	resolveResponseContentTypeSuccess(t, "text/html", []string{"text/txt", "text/html"}, "text/txt;q=0.5,text/html;q=0.9")
+	resolveResponseContentTypeSuccess(t, "", []string{"text"}, "text/html")
+	resolveResponseContentTypeSuccess(t, "", []string{"text/*"}, "image/*")
+
+	// Issue #17
+	resolveResponseContentTypeSuccess(t, "*/*", []string{"*/*"}, "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3")
+
+	// Issue #66
+	resolveResponseContentTypeError(t, "bad media-range ('*')", []string{"text/plain"}, " *")
+}