forked from electricdusk/rushlink
129 lines
3.9 KiB
Go
129 lines
3.9 KiB
Go
package rushlink
|
|
|
|
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
|
|
fs *db.FileStore
|
|
rootURL *url.URL
|
|
}
|
|
|
|
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) {
|
|
defer func() {
|
|
defer func() {
|
|
if err := recover(); err != nil {
|
|
log.Printf("error: panic while recovering from another panic: %v\n", err)
|
|
debug.PrintStack()
|
|
fmt.Fprintf(w, "internal server error: %v\n", err)
|
|
}
|
|
}()
|
|
|
|
if err := recover(); err != nil {
|
|
log.Printf("error: %v\n", err)
|
|
debug.PrintStack()
|
|
rl.renderInternalServerError(w, r, err)
|
|
}
|
|
}()
|
|
next.ServeHTTP(w, r)
|
|
})
|
|
}
|
|
|
|
func (rl *rushlink) metricsMiddleware(next http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
srw := statusResponseWriter{Inner: w}
|
|
next.ServeHTTP(&srw, r)
|
|
status := strconv.Itoa(srw.StatusCode)
|
|
metricRequestsTotalCounter.WithLabelValues(status, r.Method).Inc()
|
|
})
|
|
}
|
|
|
|
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)
|
|
}
|
|
|
|
// CreateMainRouter creates the main Gorilla router for the application.
|
|
func CreateMainRouter(rl *rushlink) *mux.Router {
|
|
router := mux.NewRouter()
|
|
router.Use(rl.recoveryMiddleware)
|
|
router.Use(rl.metricsMiddleware)
|
|
router.HandleFunc("/{path:img/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
|
|
router.HandleFunc("/{path:css/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
|
|
router.HandleFunc("/{path:js/"+staticFilenameExpr+"}", rl.staticGetHandler).Methods("GET", "HEAD")
|
|
router.HandleFunc("/", rl.indexGetHandler).Methods("GET", "HEAD")
|
|
router.HandleFunc("/", rl.newPasteHandler).Methods("POST")
|
|
router.HandleFunc("/"+urlKeyExpr, rl.viewPasteHandler).Methods("GET", "HEAD")
|
|
router.HandleFunc("/"+urlKeyWithExtExpr, rl.viewPasteHandler).Methods("GET", "HEAD")
|
|
router.HandleFunc("/"+urlKeyExpr+"/nr", rl.viewPasteHandlerNoRedirect).Methods("GET", "HEAD")
|
|
router.HandleFunc("/"+urlKeyWithExtExpr+"/nr", rl.viewPasteHandlerNoRedirect).Methods("GET", "HEAD")
|
|
router.HandleFunc("/"+urlKeyExpr+"/meta", rl.viewPasteHandlerMeta).Methods("GET", "HEAD")
|
|
router.HandleFunc("/"+urlKeyWithExtExpr+"/meta", rl.viewPasteHandlerMeta).Methods("GET", "HEAD")
|
|
router.HandleFunc("/"+urlKeyExpr, rl.deletePasteHandler).Methods("DELETE")
|
|
router.HandleFunc("/"+urlKeyWithExtExpr, rl.deletePasteHandler).Methods("DELETE")
|
|
router.HandleFunc("/"+urlKeyExpr+"/delete", rl.deletePasteHandler).Methods("POST")
|
|
router.HandleFunc("/"+urlKeyWithExtExpr+"/delete", rl.deletePasteHandler).Methods("POST")
|
|
return router
|
|
}
|
|
|
|
// 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,
|
|
fs: fs,
|
|
rootURL: rootURL,
|
|
}
|
|
|
|
srv := &http.Server{
|
|
Handler: CreateMainRouter(&rl),
|
|
Addr: addr,
|
|
WriteTimeout: 15 * time.Second,
|
|
ReadTimeout: 15 * time.Second,
|
|
}
|
|
log.Fatal(srv.ListenAndServe())
|
|
}
|