mirror of https://github.com/jlelse/GoBlog
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
package main
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import (
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"crypto/sha256"
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"fmt"
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"io"
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"mime"
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"net/http"
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"path/filepath"
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"strings"
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"go.goblog.app/app/pkgs/contenttype"
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)
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const micropubMediaSubPath = "/media"
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func (a *goBlog) serveMicropubMedia(w http.ResponseWriter, r *http.Request) {
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// Check scope
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if !a.micropubCheckScope(w, r, "media") {
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return
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}
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// Check if request is multipart
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if ct := r.Header.Get(contentType); !strings.Contains(ct, contenttype.MultipartForm) {
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a.serveError(w, r, "wrong content-type", http.StatusBadRequest)
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return
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}
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// Parse multipart form
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err := r.ParseMultipartForm(0)
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if err != nil {
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a.serveError(w, r, "failed to parse multipart form", http.StatusBadRequest)
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return
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}
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// Get file
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file, header, err := r.FormFile("file")
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if err != nil {
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a.serveError(w, r, "failed to get multipart file", http.StatusBadRequest)
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return
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}
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defer file.Close()
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// Generate sha256 hash for file
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hash := sha256.New()
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_, err = io.Copy(hash, file)
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if err != nil {
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a.serveError(w, r, "failed to get file hash", http.StatusBadRequest)
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return
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}
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// Get file extension
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fileExtension := filepath.Ext(header.Filename)
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if fileExtension == "" {
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// Find correct file extension if original filename does not contain one
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mimeType := header.Header.Get(contentType)
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if len(mimeType) > 0 {
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allExtensions, _ := mime.ExtensionsByType(mimeType)
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if len(allExtensions) > 0 {
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fileExtension = allExtensions[0]
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}
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}
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}
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// Generate the file name
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fileName := fmt.Sprintf("%x%s", hash.Sum(nil), fileExtension)
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// Save file
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_, err = file.Seek(0, io.SeekStart)
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if err != nil {
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a.serveError(w, r, "failed to read multipart file", http.StatusInternalServerError)
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return
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}
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location, err := a.saveMediaFile(fileName, file)
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if err != nil {
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a.serveError(w, r, "failed to save original file", http.StatusInternalServerError)
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return
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}
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// Try to compress file (only when not in private mode)
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if !a.isPrivate() {
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compressedLocation, compressionErr := a.compressMediaFile(location)
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if compressionErr != nil {
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a.serveError(w, r, "failed to compress file: "+compressionErr.Error(), http.StatusInternalServerError)
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return
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}
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// Overwrite location
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if compressedLocation != "" {
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location = compressedLocation
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}
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}
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http.Redirect(w, r, location, http.StatusCreated)
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}
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