web: Implement drag-and-drop upload
This commit is contained in:
Daan Sprenkels
parent
087b9920e6
commit
c46a26f8a2
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@ -0,0 +1,18 @@
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body {
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font-family: monospace;
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}
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#dropZone {
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background-color: rgba(0, 0, 0.2, 0.75);
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color: white;
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font-size: 60px;
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font-weight: bold;
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height: 100%;
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left: 0;
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padding: 1em;
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position: fixed;
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top: 0;
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transition: visibility 175ms, opacity 175ms;
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width: 100%;
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z-index: 999;
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}
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@ -0,0 +1,48 @@
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"use strict";
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window.addEventListener('DOMContentLoaded', (event) => {
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// The implementation of this drag-drop logic is largely based on the
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// answer described in <https://stackoverflow.com/a/28226022/5207081>.
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//
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// The gist is this: every time the drag enters a new DOM object, it will
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// fire a new 'dragenter' event on that element. That is a pain, because
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// we do not know which element will be the last to receive a dragleave
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// event, in case the user aborts the process.
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//
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// Therefore, we use an Ugly Hack™. There will be an element with id
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// 'dropZone', which blocks the complete page. When a 'dragenter' event
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// is received on any DOM element, we will unhide this modal page-blocker.
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// This will guarantee us that the next 'enter' event will be received on
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// this page-block element. This event we shall ignore.
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//
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// Then, whenever the user stop their drag action, we will receive the
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// 'dragleave' on the '#dropZone' element. Now we know when exactly
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// a drag action is cancelled (and we will hide the modal element
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// accordingly).
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let dropZone = document.getElementById("dropZone");
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window.addEventListener("dragenter", (event) => {
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// User starts a drag action
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dropZone.style.visibility = "";
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dropZone.style.opacity = 1;
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});
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dropZone.addEventListener("drop", (event) => {
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// User drops a file
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event.preventDefault();
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document.getElementById("fileUploadField").files = event.dataTransfer.files;
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document.getElementById("fileUploadForm").submit();
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});
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dropZone.addEventListener("dragleave", (event) => {
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// User cancels drag action
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dropZone.style.visibility = "hidden";
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dropZone.style.opacity = 0;
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});
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window.addEventListener("dragover", (event) => {
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// Prevent the browser from opening the file, because of a drop event
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// on the window. (<https://stackoverflow.com/a/6756680/5207081>)
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event.preventDefault();
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});
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});
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@ -2,7 +2,9 @@
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<html>
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<head>
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<meta charset="utf-8">
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<title>{{block "title" .}}rushlink{{end}}</title>{{block "head-append" .}}{{end}}
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<title>{{block "title" .}}rushlink{{end}}</title>
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<link rel="stylesheet" type="text/css" href="/css/main.css" />
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{{block "head-append" .}}{{end -}}
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</head>
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<body>
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{{block "body" .}}
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@ -1,4 +1,9 @@
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{{define "head-append"}}
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<script type="text/javascript" src="/js/dragdrop.js" defer></script>
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{{end}}
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{{define "body"}}
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<div style="visibility:hidden; opacity:0" id="dropZone">File incoming! :D</div>
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<h1>#RU paste-dump</h1>
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Based on https://0x0.st/, this site allows you to easily upload files and shorten URLs using
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@ -6,17 +11,17 @@ the command line.
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<h2>Web-API</h2>
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<section>
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<form action="/" method="post" enctype="multipart/form-data">
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<form id="fileUploadForm" action="/" method="post" enctype="multipart/form-data">
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<label class="formLabel" for="fileUploadField">Upload a file:</label>
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<input class="formMain" id="fileUploadField" name="file" type="file" />
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<input class="formSubmit" id="fileUploadSubmit" type="submit" value="upload!" />
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<input id="fileUploadField" class="formMain" name="file" type="file" />
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<input id="fileUploadField" class="formSubmit" type="submit" value="upload!" />
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</form>
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</section>
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<section>
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<form action="/" method="post" enctype="multipart/form-data">
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<form id="shortenURLForm" action="/" method="post" enctype="multipart/form-data">
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<label class="formLabel" for="shortenURLField">Upload a URL:</label>
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<input class="formMain" id="shortenURLField" name="shorten" type="url" />
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<input class="formSubmit" id="shortenURLSubmit" type="submit" value="shorten!" />
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<input id="shortenURLField" class="formMain" name="shorten" type="url" />
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<input id="shortenURLSubmit" class="formSubmit" type="submit" value="shorten!" />
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</form>
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</section>
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@ -28,6 +28,10 @@ const (
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const cookieDeleteToken = "owner_token"
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func (rl *rushlink) staticGetHandler(w http.ResponseWriter, r *http.Request) {
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rl.renderStatic(w, r, mux.Vars(r)["path"])
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}
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func (rl *rushlink) indexGetHandler(w http.ResponseWriter, r *http.Request) {
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rl.render(w, r, "index", map[string]interface{}{})
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}
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@ -14,6 +14,7 @@ import (
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"github.com/pkg/errors"
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)
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const staticFilenameExpr = "[A-Za-z0-9-_.]+"
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const urlKeyExpr = "{key:[A-Za-z0-9-_]{4,}}"
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const urlKeyWithExtExpr = urlKeyExpr + "{ext:\\.[A-Za-z0-9-_]+}"
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@ -101,6 +102,9 @@ func StartMainServer(addr string, db *db.Database, fs *db.FileStore, rawhost *st
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router.Use(rl.recoveryMiddleware)
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router.Use(rl.metricsMiddleware)
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router.HandleFunc("/uploads/{id:[A-Za-z0-9-_]+}/{filename:.+}", rl.uploadFileGetHandler).Methods("GET", "HEAD")
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router.HandleFunc("/{path:img/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
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router.HandleFunc("/{path:css/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
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router.HandleFunc("/{path:js/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
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router.HandleFunc("/", rl.indexGetHandler).Methods("GET", "HEAD")
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router.HandleFunc("/", rl.newPasteHandler).Methods("POST")
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router.HandleFunc("/"+urlKeyExpr, rl.viewPasteHandler).Methods("GET", "HEAD")
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14
views.go
14
views.go
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@ -17,6 +17,7 @@ import (
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"strconv"
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"strings"
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text "text/template"
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"time"
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"gitea.hashru.nl/dsprenkels/rushlink/internal/db"
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@ -88,6 +89,19 @@ func mapExtend(m map[string]interface{}, key string, value interface{}) {
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m[key] = value
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}
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func (rl *rushlink) renderStatic(w http.ResponseWriter, r *http.Request, path string) {
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var modTime time.Time
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if info, err := AssetInfo(path); err != nil {
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modTime = info.ModTime()
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}
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contents, err := Asset(path)
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if err != nil {
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rl.renderError(w, r, http.StatusNotFound, err.Error())
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return
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}
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http.ServeContent(w, r, path, modTime, bytes.NewReader(contents))
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}
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func (rl *rushlink) render(w http.ResponseWriter, r *http.Request, tmplName string, data map[string]interface{}) {
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contentType, err := resolveResponseContentType(r, []string{"text/plain", "text/html"})
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if err != nil {
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