mirror of
https://github.com/dutchcoders/transfer.sh.git
synced 2025-01-13 20:20:19 +01:00
4daca97f89
Previously, the metadata file would be rewritten even if the download counter stayed the same (i.e. `increaseDownload = false`, previews and HEAD requests). Because the metadata doesn't change in that case, this would simply rewrite the exact same contents needlessly, which may also incur extra costs depending on the storage backend.
1117 lines
28 KiB
Go
1117 lines
28 KiB
Go
/*
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The MIT License (MIT)
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Copyright (c) 2014-2017 DutchCoders [https://github.com/dutchcoders/]
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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package server
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import (
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// _ "transfer.sh/app/handlers"
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// _ "transfer.sh/app/utils"
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"archive/tar"
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"archive/zip"
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"bytes"
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"compress/gzip"
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"encoding/json"
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"errors"
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"fmt"
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blackfriday "github.com/russross/blackfriday/v2"
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"html"
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html_template "html/template"
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"io"
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"io/ioutil"
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"log"
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"math/rand"
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"mime"
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"net/http"
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"net/url"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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text_template "text/template"
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"time"
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"net"
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"encoding/base64"
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web "github.com/dutchcoders/transfer.sh-web"
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"github.com/gorilla/mux"
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"github.com/microcosm-cc/bluemonday"
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"github.com/skip2/go-qrcode"
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)
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const getPathPart = "get"
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var (
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htmlTemplates = initHTMLTemplates()
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textTemplates = initTextTemplates()
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)
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func stripPrefix(path string) string {
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return strings.Replace(path, web.Prefix+"/", "", -1)
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}
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func initTextTemplates() *text_template.Template {
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templateMap := text_template.FuncMap{"format": formatNumber}
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// Templates with functions available to them
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var templates = text_template.New("").Funcs(templateMap)
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return templates
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}
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func initHTMLTemplates() *html_template.Template {
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templateMap := html_template.FuncMap{"format": formatNumber}
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// Templates with functions available to them
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var templates = html_template.New("").Funcs(templateMap)
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return templates
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}
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func healthHandler(w http.ResponseWriter, r *http.Request) {
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fmt.Fprintf(w, "Approaching Neutral Zone, all systems normal and functioning.")
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}
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/* The preview handler will show a preview of the content for browsers (accept type text/html), and referer is not transfer.sh */
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func (s *Server) previewHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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token := vars["token"]
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filename := vars["filename"]
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metadata, err := s.CheckMetadata(token, filename, false)
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if err != nil {
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log.Printf("Error metadata: %s", err.Error())
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http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
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return
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}
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contentType := metadata.ContentType
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contentLength, err := s.storage.Head(token, filename)
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if err != nil {
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http.Error(w, http.StatusText(404), 404)
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return
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}
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var templatePath string
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var content html_template.HTML
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switch {
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case strings.HasPrefix(contentType, "image/"):
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templatePath = "download.image.html"
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case strings.HasPrefix(contentType, "video/"):
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templatePath = "download.video.html"
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case strings.HasPrefix(contentType, "audio/"):
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templatePath = "download.audio.html"
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case strings.HasPrefix(contentType, "text/"):
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templatePath = "download.markdown.html"
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var reader io.ReadCloser
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if reader, _, err = s.storage.Get(token, filename); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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var data []byte
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data = make([]byte, _5M)
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if _, err = reader.Read(data); err != io.EOF && err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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if strings.HasPrefix(contentType, "text/x-markdown") || strings.HasPrefix(contentType, "text/markdown") {
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unsafe := blackfriday.Run(data)
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output := bluemonday.UGCPolicy().SanitizeBytes(unsafe)
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content = html_template.HTML(output)
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} else if strings.HasPrefix(contentType, "text/plain") {
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content = html_template.HTML(fmt.Sprintf("<pre>%s</pre>", html.EscapeString(string(data))))
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} else {
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templatePath = "download.sandbox.html"
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}
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default:
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templatePath = "download.html"
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}
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relativeURL, _ := url.Parse(path.Join(s.proxyPath, token, filename))
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resolvedURL := resolveURL(r, relativeURL, s.proxyPort)
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relativeURLGet, _ := url.Parse(path.Join(s.proxyPath, getPathPart, token, filename))
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resolvedURLGet := resolveURL(r, relativeURLGet, s.proxyPort)
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var png []byte
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png, err = qrcode.Encode(resolvedURL, qrcode.High, 150)
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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qrCode := base64.StdEncoding.EncodeToString(png)
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hostname := getURL(r, s.proxyPort).Host
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webAddress := resolveWebAddress(r, s.proxyPath, s.proxyPort)
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data := struct {
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ContentType string
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Content html_template.HTML
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Filename string
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Url string
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UrlGet string
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Hostname string
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WebAddress string
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ContentLength uint64
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GAKey string
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UserVoiceKey string
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QRCode string
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}{
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contentType,
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content,
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filename,
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resolvedURL,
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resolvedURLGet,
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hostname,
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webAddress,
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contentLength,
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s.gaKey,
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s.userVoiceKey,
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qrCode,
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}
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if err := htmlTemplates.ExecuteTemplate(w, templatePath, data); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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// this handler will output html or text, depending on the
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// support of the client (Accept header).
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func (s *Server) viewHandler(w http.ResponseWriter, r *http.Request) {
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// vars := mux.Vars(r)
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hostname := getURL(r, s.proxyPort).Host
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webAddress := resolveWebAddress(r, s.proxyPath, s.proxyPort)
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data := struct {
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Hostname string
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WebAddress string
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GAKey string
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UserVoiceKey string
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}{
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hostname,
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webAddress,
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s.gaKey,
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s.userVoiceKey,
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}
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if acceptsHTML(r.Header) {
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if err := htmlTemplates.ExecuteTemplate(w, "index.html", data); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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} else {
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if err := textTemplates.ExecuteTemplate(w, "index.txt", data); err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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}
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}
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func (s *Server) notFoundHandler(w http.ResponseWriter, r *http.Request) {
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http.Error(w, http.StatusText(404), 404)
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}
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func sanitize(fileName string) string {
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return path.Clean(path.Base(fileName))
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}
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func (s *Server) postHandler(w http.ResponseWriter, r *http.Request) {
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if err := r.ParseMultipartForm(_24K); nil != err {
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log.Printf("%s", err.Error())
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http.Error(w, "Error occurred copying to output stream", 500)
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return
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}
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token := Encode(10000000 + int64(rand.Intn(1000000000)))
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w.Header().Set("Content-Type", "text/plain")
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for _, fheaders := range r.MultipartForm.File {
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for _, fheader := range fheaders {
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filename := sanitize(fheader.Filename)
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contentType := fheader.Header.Get("Content-Type")
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if contentType == "" {
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contentType = mime.TypeByExtension(filepath.Ext(fheader.Filename))
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}
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var f io.Reader
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var err error
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if f, err = fheader.Open(); err != nil {
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log.Printf("%s", err.Error())
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http.Error(w, err.Error(), 500)
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return
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}
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var b bytes.Buffer
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n, err := io.CopyN(&b, f, _24K+1)
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if err != nil && err != io.EOF {
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log.Printf("%s", err.Error())
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http.Error(w, err.Error(), 500)
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return
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}
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var file *os.File
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var reader io.Reader
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if n > _24K {
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file, err = ioutil.TempFile(s.tempPath, "transfer-")
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if err != nil {
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log.Fatal(err)
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}
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n, err = io.Copy(file, io.MultiReader(&b, f))
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if err != nil {
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cleanTmpFile(file)
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log.Printf("%s", err.Error())
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http.Error(w, err.Error(), 500)
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return
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}
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reader, err = os.Open(file.Name())
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} else {
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reader = bytes.NewReader(b.Bytes())
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}
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contentLength := n
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if s.maxUploadSize > 0 && contentLength > s.maxUploadSize {
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log.Print("Entity too large")
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http.Error(w, http.StatusText(http.StatusRequestEntityTooLarge), http.StatusRequestEntityTooLarge)
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return
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}
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metadata := MetadataForRequest(contentType, r)
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buffer := &bytes.Buffer{}
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if err := json.NewEncoder(buffer).Encode(metadata); err != nil {
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log.Printf("%s", err.Error())
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http.Error(w, errors.New("Could not encode metadata").Error(), 500)
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cleanTmpFile(file)
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return
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} else if err := s.storage.Put(token, fmt.Sprintf("%s.metadata", filename), buffer, "text/json", uint64(buffer.Len())); err != nil {
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log.Printf("%s", err.Error())
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http.Error(w, errors.New("Could not save metadata").Error(), 500)
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cleanTmpFile(file)
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return
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}
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log.Printf("Uploading %s %s %d %s", token, filename, contentLength, contentType)
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if err = s.storage.Put(token, filename, reader, contentType, uint64(contentLength)); err != nil {
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log.Printf("Backend storage error: %s", err.Error())
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http.Error(w, err.Error(), 500)
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return
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}
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filename = url.PathEscape(filename)
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relativeURL, _ := url.Parse(path.Join(s.proxyPath, token, filename))
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fmt.Fprintln(w, getURL(r, s.proxyPort).ResolveReference(relativeURL).String())
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cleanTmpFile(file)
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}
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}
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}
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func cleanTmpFile(f *os.File) {
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if f != nil {
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err := f.Close()
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if err != nil {
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log.Printf("Error closing tmpfile: %s (%s)", err, f.Name())
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}
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err = os.Remove(f.Name())
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if err != nil {
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log.Printf("Error removing tmpfile: %s (%s)", err, f.Name())
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}
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}
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}
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type Metadata struct {
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// ContentType is the original uploading content type
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ContentType string
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// Secret as knowledge to delete file
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// Secret string
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// Downloads is the actual number of downloads
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Downloads int
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// MaxDownloads contains the maximum numbers of downloads
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MaxDownloads int
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// MaxDate contains the max age of the file
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MaxDate time.Time
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// DeletionToken contains the token to match against for deletion
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DeletionToken string
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}
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func MetadataForRequest(contentType string, r *http.Request) Metadata {
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metadata := Metadata{
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ContentType: strings.ToLower(contentType),
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MaxDate: time.Time{},
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Downloads: 0,
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MaxDownloads: -1,
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DeletionToken: Encode(10000000+int64(rand.Intn(1000000000))) + Encode(10000000+int64(rand.Intn(1000000000))),
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}
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if v := r.Header.Get("Max-Downloads"); v == "" {
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} else if v, err := strconv.Atoi(v); err != nil {
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} else {
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metadata.MaxDownloads = v
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}
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if v := r.Header.Get("Max-Days"); v == "" {
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} else if v, err := strconv.Atoi(v); err != nil {
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} else {
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metadata.MaxDate = time.Now().Add(time.Hour * 24 * time.Duration(v))
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}
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return metadata
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}
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func (s *Server) putHandler(w http.ResponseWriter, r *http.Request) {
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vars := mux.Vars(r)
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filename := sanitize(vars["filename"])
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contentLength := r.ContentLength
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var reader io.Reader
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reader = r.Body
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defer r.Body.Close()
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if contentLength == -1 {
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// queue file to disk, because s3 needs content length
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var err error
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var f io.Reader
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f = reader
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var b bytes.Buffer
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n, err := io.CopyN(&b, f, _24K+1)
|
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if err != nil && err != io.EOF {
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log.Printf("Error putting new file: %s", err.Error())
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http.Error(w, err.Error(), 500)
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return
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}
|
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var file *os.File
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if n > _24K {
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file, err = ioutil.TempFile(s.tempPath, "transfer-")
|
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if err != nil {
|
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log.Printf("%s", err.Error())
|
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http.Error(w, err.Error(), 500)
|
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return
|
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}
|
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defer cleanTmpFile(file)
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n, err = io.Copy(file, io.MultiReader(&b, f))
|
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if err != nil {
|
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log.Printf("%s", err.Error())
|
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http.Error(w, err.Error(), 500)
|
|
return
|
|
}
|
|
|
|
reader, err = os.Open(file.Name())
|
|
} else {
|
|
reader = bytes.NewReader(b.Bytes())
|
|
}
|
|
|
|
contentLength = n
|
|
}
|
|
|
|
if s.maxUploadSize > 0 && contentLength > s.maxUploadSize {
|
|
log.Print("Entity too large")
|
|
http.Error(w, http.StatusText(http.StatusRequestEntityTooLarge), http.StatusRequestEntityTooLarge)
|
|
return
|
|
}
|
|
|
|
if contentLength == 0 {
|
|
log.Print("Empty content-length")
|
|
http.Error(w, errors.New("Could not upload empty file").Error(), 400)
|
|
return
|
|
}
|
|
|
|
contentType := r.Header.Get("Content-Type")
|
|
|
|
if contentType == "" {
|
|
contentType = mime.TypeByExtension(filepath.Ext(vars["filename"]))
|
|
}
|
|
|
|
token := Encode(10000000 + int64(rand.Intn(1000000000)))
|
|
|
|
metadata := MetadataForRequest(contentType, r)
|
|
|
|
buffer := &bytes.Buffer{}
|
|
if err := json.NewEncoder(buffer).Encode(metadata); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, errors.New("Could not encode metadata").Error(), 500)
|
|
return
|
|
} else if err := s.storage.Put(token, fmt.Sprintf("%s.metadata", filename), buffer, "text/json", uint64(buffer.Len())); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, errors.New("Could not save metadata").Error(), 500)
|
|
return
|
|
}
|
|
|
|
log.Printf("Uploading %s %s %d %s", token, filename, contentLength, contentType)
|
|
|
|
var err error
|
|
|
|
if err = s.storage.Put(token, filename, reader, contentType, uint64(contentLength)); err != nil {
|
|
log.Printf("Error putting new file: %s", err.Error())
|
|
http.Error(w, errors.New("Could not save file").Error(), 500)
|
|
return
|
|
}
|
|
|
|
// w.Statuscode = 200
|
|
|
|
w.Header().Set("Content-Type", "text/plain")
|
|
|
|
filename = url.PathEscape(filename)
|
|
relativeURL, _ := url.Parse(path.Join(s.proxyPath, token, filename))
|
|
deleteURL, _ := url.Parse(path.Join(s.proxyPath, token, filename, metadata.DeletionToken))
|
|
|
|
w.Header().Set("X-Url-Delete", resolveURL(r, deleteURL, s.proxyPort))
|
|
|
|
fmt.Fprint(w, resolveURL(r, relativeURL, s.proxyPort))
|
|
}
|
|
|
|
func resolveURL(r *http.Request, u *url.URL, proxyPort string) string {
|
|
r.URL.Path = ""
|
|
|
|
return getURL(r, proxyPort).ResolveReference(u).String()
|
|
}
|
|
|
|
func resolveKey(key, proxyPath string) string {
|
|
if strings.HasPrefix(key, "/") {
|
|
key = key[1:]
|
|
}
|
|
|
|
if strings.HasPrefix(key, proxyPath) {
|
|
key = key[len(proxyPath):]
|
|
}
|
|
|
|
key = strings.Replace(key, "\\", "/", -1)
|
|
|
|
return key
|
|
}
|
|
|
|
func resolveWebAddress(r *http.Request, proxyPath string, proxyPort string) string {
|
|
url := getURL(r, proxyPort)
|
|
|
|
var webAddress string
|
|
|
|
if len(proxyPath) == 0 {
|
|
webAddress = fmt.Sprintf("%s://%s/",
|
|
url.ResolveReference(url).Scheme,
|
|
url.ResolveReference(url).Host)
|
|
} else {
|
|
webAddress = fmt.Sprintf("%s://%s/%s",
|
|
url.ResolveReference(url).Scheme,
|
|
url.ResolveReference(url).Host,
|
|
proxyPath)
|
|
}
|
|
|
|
return webAddress
|
|
}
|
|
|
|
// Similar to the logic found here:
|
|
// https://github.com/golang/go/blob/release-branch.go1.14/src/net/http/clone.go#L22-L33
|
|
func cloneURL(u *url.URL) *url.URL {
|
|
c := &url.URL{}
|
|
*c = *u
|
|
|
|
if u.User != nil {
|
|
c.User = &url.Userinfo{}
|
|
*c.User = *u.User
|
|
}
|
|
|
|
return c
|
|
}
|
|
|
|
func getURL(r *http.Request, proxyPort string) *url.URL {
|
|
u := cloneURL(r.URL)
|
|
|
|
if r.TLS != nil {
|
|
u.Scheme = "https"
|
|
} else if proto := r.Header.Get("X-Forwarded-Proto"); proto != "" {
|
|
u.Scheme = proto
|
|
} else {
|
|
u.Scheme = "http"
|
|
}
|
|
|
|
if u.Host == "" {
|
|
host, port, err := net.SplitHostPort(r.Host)
|
|
if err != nil {
|
|
host = r.Host
|
|
port = ""
|
|
}
|
|
if len(proxyPort) != 0 {
|
|
port = proxyPort
|
|
}
|
|
if len(port) == 0 {
|
|
u.Host = host
|
|
} else {
|
|
if port == "80" && u.Scheme == "http" {
|
|
u.Host = host
|
|
} else if port == "443" && u.Scheme == "https" {
|
|
u.Host = host
|
|
} else {
|
|
u.Host = net.JoinHostPort(host, port)
|
|
}
|
|
}
|
|
}
|
|
|
|
return u
|
|
}
|
|
|
|
func (metadata Metadata) remainingLimitHeaderValues() (remainingDownloads, remainingDays string) {
|
|
if metadata.MaxDate.IsZero() {
|
|
remainingDays = "n/a"
|
|
} else {
|
|
timeDifference := metadata.MaxDate.Sub(time.Now())
|
|
remainingDays = strconv.Itoa(int(timeDifference.Hours()/24) + 1)
|
|
}
|
|
|
|
if metadata.MaxDownloads == -1 {
|
|
remainingDownloads = "n/a"
|
|
} else {
|
|
remainingDownloads = strconv.Itoa(metadata.MaxDownloads - metadata.Downloads)
|
|
}
|
|
|
|
return remainingDownloads, remainingDays
|
|
}
|
|
|
|
func (s *Server) Lock(token, filename string) error {
|
|
key := path.Join(token, filename)
|
|
|
|
if _, ok := s.locks[key]; !ok {
|
|
s.locks[key] = &sync.Mutex{}
|
|
}
|
|
|
|
s.locks[key].Lock()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *Server) Unlock(token, filename string) error {
|
|
key := path.Join(token, filename)
|
|
s.locks[key].Unlock()
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *Server) CheckMetadata(token, filename string, increaseDownload bool) (Metadata, error) {
|
|
s.Lock(token, filename)
|
|
defer s.Unlock(token, filename)
|
|
|
|
var metadata Metadata
|
|
|
|
r, _, err := s.storage.Get(token, fmt.Sprintf("%s.metadata", filename))
|
|
if err != nil {
|
|
return metadata, err
|
|
}
|
|
|
|
defer r.Close()
|
|
|
|
if err := json.NewDecoder(r).Decode(&metadata); err != nil {
|
|
return metadata, err
|
|
} else if metadata.MaxDownloads != -1 && metadata.Downloads >= metadata.MaxDownloads {
|
|
return metadata, errors.New("MaxDownloads expired.")
|
|
} else if !metadata.MaxDate.IsZero() && time.Now().After(metadata.MaxDate) {
|
|
return metadata, errors.New("MaxDate expired.")
|
|
} else if increaseDownload {
|
|
// todo(nl5887): mutex?
|
|
|
|
// update number of downloads
|
|
metadata.Downloads++
|
|
|
|
buffer := &bytes.Buffer{}
|
|
if err := json.NewEncoder(buffer).Encode(metadata); err != nil {
|
|
return metadata, errors.New("Could not encode metadata")
|
|
} else if err := s.storage.Put(token, fmt.Sprintf("%s.metadata", filename), buffer, "text/json", uint64(buffer.Len())); err != nil {
|
|
return metadata, errors.New("Could not save metadata")
|
|
}
|
|
}
|
|
|
|
return metadata, nil
|
|
}
|
|
|
|
func (s *Server) CheckDeletionToken(deletionToken, token, filename string) error {
|
|
s.Lock(token, filename)
|
|
defer s.Unlock(token, filename)
|
|
|
|
var metadata Metadata
|
|
|
|
r, _, err := s.storage.Get(token, fmt.Sprintf("%s.metadata", filename))
|
|
if s.storage.IsNotExist(err) {
|
|
return nil
|
|
} else if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer r.Close()
|
|
|
|
if err := json.NewDecoder(r).Decode(&metadata); err != nil {
|
|
return err
|
|
} else if metadata.DeletionToken != deletionToken {
|
|
return errors.New("Deletion token doesn't match.")
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (s *Server) purgeHandler() {
|
|
ticker := time.NewTicker(s.purgeInterval)
|
|
go func() {
|
|
for {
|
|
select {
|
|
case <-ticker.C:
|
|
err := s.storage.Purge(s.purgeDays)
|
|
log.Printf("error cleaning up expired files: %v", err)
|
|
}
|
|
}
|
|
}()
|
|
}
|
|
|
|
func (s *Server) deleteHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
|
|
token := vars["token"]
|
|
filename := vars["filename"]
|
|
deletionToken := vars["deletionToken"]
|
|
|
|
if err := s.CheckDeletionToken(deletionToken, token, filename); err != nil {
|
|
log.Printf("Error metadata: %s", err.Error())
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
|
|
err := s.storage.Delete(token, filename)
|
|
if s.storage.IsNotExist(err) {
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
} else if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Could not delete file.", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
func (s *Server) zipHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
|
|
files := vars["files"]
|
|
|
|
zipfilename := fmt.Sprintf("transfersh-%d.zip", uint16(time.Now().UnixNano()))
|
|
|
|
w.Header().Set("Content-Type", "application/zip")
|
|
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", zipfilename))
|
|
w.Header().Set("Connection", "close")
|
|
|
|
zw := zip.NewWriter(w)
|
|
|
|
for _, key := range strings.Split(files, ",") {
|
|
key = resolveKey(key, s.proxyPath)
|
|
|
|
token := strings.Split(key, "/")[0]
|
|
filename := sanitize(strings.Split(key, "/")[1])
|
|
|
|
if _, err := s.CheckMetadata(token, filename, true); err != nil {
|
|
log.Printf("Error metadata: %s", err.Error())
|
|
continue
|
|
}
|
|
|
|
reader, _, err := s.storage.Get(token, filename)
|
|
|
|
if err != nil {
|
|
if s.storage.IsNotExist(err) {
|
|
http.Error(w, "File not found", 404)
|
|
return
|
|
} else {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Could not retrieve file.", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
defer reader.Close()
|
|
|
|
header := &zip.FileHeader{
|
|
Name: strings.Split(key, "/")[1],
|
|
Method: zip.Store,
|
|
ModifiedTime: uint16(time.Now().UnixNano()),
|
|
ModifiedDate: uint16(time.Now().UnixNano()),
|
|
}
|
|
|
|
fw, err := zw.CreateHeader(header)
|
|
|
|
if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
|
|
if _, err = io.Copy(fw, reader); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
if err := zw.Close(); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
func (s *Server) tarGzHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
|
|
files := vars["files"]
|
|
|
|
tarfilename := fmt.Sprintf("transfersh-%d.tar.gz", uint16(time.Now().UnixNano()))
|
|
|
|
w.Header().Set("Content-Type", "application/x-gzip")
|
|
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", tarfilename))
|
|
w.Header().Set("Connection", "close")
|
|
|
|
os := gzip.NewWriter(w)
|
|
defer os.Close()
|
|
|
|
zw := tar.NewWriter(os)
|
|
defer zw.Close()
|
|
|
|
for _, key := range strings.Split(files, ",") {
|
|
key = resolveKey(key, s.proxyPath)
|
|
|
|
token := strings.Split(key, "/")[0]
|
|
filename := sanitize(strings.Split(key, "/")[1])
|
|
|
|
if _, err := s.CheckMetadata(token, filename, true); err != nil {
|
|
log.Printf("Error metadata: %s", err.Error())
|
|
continue
|
|
}
|
|
|
|
reader, contentLength, err := s.storage.Get(token, filename)
|
|
if err != nil {
|
|
if s.storage.IsNotExist(err) {
|
|
http.Error(w, "File not found", 404)
|
|
return
|
|
} else {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Could not retrieve file.", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
defer reader.Close()
|
|
|
|
header := &tar.Header{
|
|
Name: strings.Split(key, "/")[1],
|
|
Size: int64(contentLength),
|
|
}
|
|
|
|
err = zw.WriteHeader(header)
|
|
if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
|
|
if _, err = io.Copy(zw, reader); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *Server) tarHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
|
|
files := vars["files"]
|
|
|
|
tarfilename := fmt.Sprintf("transfersh-%d.tar", uint16(time.Now().UnixNano()))
|
|
|
|
w.Header().Set("Content-Type", "application/x-tar")
|
|
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", tarfilename))
|
|
w.Header().Set("Connection", "close")
|
|
|
|
zw := tar.NewWriter(w)
|
|
defer zw.Close()
|
|
|
|
for _, key := range strings.Split(files, ",") {
|
|
key = resolveKey(key, s.proxyPath)
|
|
|
|
token := strings.Split(key, "/")[0]
|
|
filename := strings.Split(key, "/")[1]
|
|
|
|
if _, err := s.CheckMetadata(token, filename, true); err != nil {
|
|
log.Printf("Error metadata: %s", err.Error())
|
|
continue
|
|
}
|
|
|
|
reader, contentLength, err := s.storage.Get(token, filename)
|
|
if err != nil {
|
|
if s.storage.IsNotExist(err) {
|
|
http.Error(w, "File not found", 404)
|
|
return
|
|
} else {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Could not retrieve file.", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
defer reader.Close()
|
|
|
|
header := &tar.Header{
|
|
Name: strings.Split(key, "/")[1],
|
|
Size: int64(contentLength),
|
|
}
|
|
|
|
err = zw.WriteHeader(header)
|
|
if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
|
|
if _, err = io.Copy(zw, reader); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Internal server error.", 500)
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func (s *Server) headHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
|
|
token := vars["token"]
|
|
filename := vars["filename"]
|
|
|
|
metadata, err := s.CheckMetadata(token, filename, false)
|
|
|
|
if err != nil {
|
|
log.Printf("Error metadata: %s", err.Error())
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
|
|
contentType := metadata.ContentType
|
|
contentLength, err := s.storage.Head(token, filename)
|
|
if s.storage.IsNotExist(err) {
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
} else if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Could not retrieve file.", 500)
|
|
return
|
|
}
|
|
|
|
remainingDownloads, remainingDays := metadata.remainingLimitHeaderValues()
|
|
|
|
w.Header().Set("Content-Type", contentType)
|
|
w.Header().Set("Content-Length", strconv.FormatUint(contentLength, 10))
|
|
w.Header().Set("Connection", "close")
|
|
w.Header().Set("X-Remaining-Downloads", remainingDownloads)
|
|
w.Header().Set("X-Remaining-Days", remainingDays)
|
|
}
|
|
|
|
func (s *Server) getHandler(w http.ResponseWriter, r *http.Request) {
|
|
vars := mux.Vars(r)
|
|
|
|
action := vars["action"]
|
|
token := vars["token"]
|
|
filename := vars["filename"]
|
|
|
|
metadata, err := s.CheckMetadata(token, filename, true)
|
|
|
|
if err != nil {
|
|
log.Printf("Error metadata: %s", err.Error())
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
}
|
|
|
|
contentType := metadata.ContentType
|
|
reader, contentLength, err := s.storage.Get(token, filename)
|
|
if s.storage.IsNotExist(err) {
|
|
http.Error(w, http.StatusText(http.StatusNotFound), http.StatusNotFound)
|
|
return
|
|
} else if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Could not retrieve file.", 500)
|
|
return
|
|
}
|
|
|
|
defer reader.Close()
|
|
|
|
var disposition string
|
|
|
|
if action == "inline" {
|
|
disposition = "inline"
|
|
} else {
|
|
disposition = "attachment"
|
|
}
|
|
|
|
remainingDownloads, remainingDays := metadata.remainingLimitHeaderValues()
|
|
|
|
w.Header().Set("Content-Type", contentType)
|
|
w.Header().Set("Content-Length", strconv.FormatUint(contentLength, 10))
|
|
w.Header().Set("Content-Disposition", fmt.Sprintf("%s; filename=\"%s\"", disposition, filename))
|
|
w.Header().Set("Connection", "keep-alive")
|
|
w.Header().Set("X-Remaining-Downloads", remainingDownloads)
|
|
w.Header().Set("X-Remaining-Days", remainingDays)
|
|
|
|
|
|
if disposition == "inline" && strings.Contains(contentType, "html") {
|
|
reader = ioutil.NopCloser(bluemonday.UGCPolicy().SanitizeReader(reader))
|
|
}
|
|
|
|
if w.Header().Get("Range") == "" {
|
|
if _, err = io.Copy(w, reader); err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Error occurred copying to output stream", 500)
|
|
return
|
|
}
|
|
|
|
return
|
|
}
|
|
|
|
file, err := ioutil.TempFile(s.tempPath, "range-")
|
|
if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Error occurred copying to output stream", 500)
|
|
return
|
|
}
|
|
|
|
defer cleanTmpFile(file)
|
|
|
|
tee := io.TeeReader(reader, file)
|
|
for {
|
|
b := make([]byte, _5M)
|
|
_, err = tee.Read(b)
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
|
|
if err != nil {
|
|
log.Printf("%s", err.Error())
|
|
http.Error(w, "Error occurred copying to output stream", 500)
|
|
return
|
|
}
|
|
}
|
|
|
|
http.ServeContent(w, r, filename, time.Now(), file)
|
|
}
|
|
|
|
func (s *Server) RedirectHandler(h http.Handler) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
if !s.forceHTTPs {
|
|
// we don't want to enforce https
|
|
} else if r.URL.Path == "/health.html" {
|
|
// health check url won't redirect
|
|
} else if strings.HasSuffix(ipAddrFromRemoteAddr(r.Host), ".onion") {
|
|
// .onion addresses cannot get a valid certificate, so don't redirect
|
|
} else if r.Header.Get("X-Forwarded-Proto") == "https" {
|
|
} else if r.URL.Scheme == "https" {
|
|
} else {
|
|
u := getURL(r, s.proxyPort)
|
|
u.Scheme = "https"
|
|
|
|
http.Redirect(w, r, u.String(), http.StatusPermanentRedirect)
|
|
return
|
|
}
|
|
|
|
h.ServeHTTP(w, r)
|
|
}
|
|
}
|
|
|
|
// Create a log handler for every request it receives.
|
|
func LoveHandler(h http.Handler) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
w.Header().Set("x-made-with", "<3 by DutchCoders")
|
|
w.Header().Set("x-served-by", "Proudly served by DutchCoders")
|
|
w.Header().Set("Server", "Transfer.sh HTTP Server 1.0")
|
|
h.ServeHTTP(w, r)
|
|
}
|
|
}
|
|
|
|
func IPFilterHandler(h http.Handler, ipFilterOptions *IPFilterOptions) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
if ipFilterOptions == nil {
|
|
h.ServeHTTP(w, r)
|
|
} else {
|
|
WrapIPFilter(h, *ipFilterOptions).ServeHTTP(w, r)
|
|
}
|
|
return
|
|
}
|
|
}
|
|
|
|
func (s *Server) BasicAuthHandler(h http.Handler) http.HandlerFunc {
|
|
return func(w http.ResponseWriter, r *http.Request) {
|
|
if s.AuthUser == "" || s.AuthPass == "" {
|
|
h.ServeHTTP(w, r)
|
|
return
|
|
}
|
|
|
|
w.Header().Set("WWW-Authenticate", "Basic realm=\"Restricted\"")
|
|
|
|
username, password, authOK := r.BasicAuth()
|
|
if authOK == false {
|
|
http.Error(w, "Not authorized", 401)
|
|
return
|
|
}
|
|
|
|
if username != s.AuthUser || password != s.AuthPass {
|
|
http.Error(w, "Not authorized", 401)
|
|
return
|
|
}
|
|
|
|
h.ServeHTTP(w, r)
|
|
}
|
|
}
|