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Allow selecting and uploading multiple EPUB files at once

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- views/pages.templ: upload input now has "multiple" attribute; page
  title/heading updated to plural ("Bücher hochladen"); templ regenerated
- internal/web/handlers.go: uploadSubmit now reads all files from
  r.MultipartForm.File["book"] instead of a single r.FormFile, saving
  each via a new saveUpload helper; partial failures are reported per
  filename while successfully saved files are kept

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
arnef
2026-08-15 14:23:05 +02:00
co-authored by Copilot
parent a51578cbf1
commit be3dfaeb47
3 changed files with 52 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files
internal/web/handlers.go
+45 -15
View File
@@ -6,6 +6,7 @@ import (
"fmt"
"io"
"log"
"mime/multipart"
"net/http"
"os"
"path/filepath"
@@ -202,19 +203,52 @@ func (h *Handler) uploadSubmit(w http.ResponseWriter, r *http.Request) {
return
}
file, header, err := r.FormFile("book")
if err != nil {
var headers []*multipart.FileHeader
if r.MultipartForm != nil {
headers = r.MultipartForm.File["book"]
}
if len(headers) == 0 {
render(w, r.Context(), views.UploadPage("Keine Datei ausgewählt."))
return
}
defer file.Close()
ext := strings.ToLower(filepath.Ext(header.Filename))
if ext != ".epub" {
render(w, r.Context(), views.UploadPage("Nur EPUB-Dateien erlaubt."))
var errs []string
saved := 0
for _, header := range headers {
if msg := h.saveUpload(header); msg != "" {
errs = append(errs, fmt.Sprintf("%s: %s", header.Filename, msg))
} else {
saved++
}
}
if len(errs) > 0 {
msg := strings.Join(errs, " ")
if saved > 0 {
msg = fmt.Sprintf("%d von %d Dateien hochgeladen. %s", saved, len(headers), msg)
}
render(w, r.Context(), views.UploadPage(msg))
return
}
http.Redirect(w, r, "/", http.StatusSeeOther)
}
// saveUpload validates and persists a single uploaded file. It returns a
// user-facing German error message, or "" on success.
func (h *Handler) saveUpload(header *multipart.FileHeader) string {
ext := strings.ToLower(filepath.Ext(header.Filename))
if ext != ".epub" {
return "Nur EPUB-Dateien erlaubt."
}
file, err := header.Open()
if err != nil {
log.Printf("upload: open %q failed: %v", header.Filename, err)
return "Datei konnte nicht gelesen werden."
}
defer file.Close()
// Sanitize filename: keep only base name, no path components.
safeFilename := filepath.Base(header.Filename)
destPath := filepath.Join(h.lib.BooksDir(), safeFilename)
@@ -223,28 +257,24 @@ func (h *Handler) uploadSubmit(w http.ResponseWriter, r *http.Request) {
cleanBase := filepath.Clean(h.lib.BooksDir())
cleanDest := filepath.Clean(destPath)
if !strings.HasPrefix(cleanDest, cleanBase+string(filepath.Separator)) {
render(w, r.Context(), views.UploadPage("Ungültiger Dateiname."))
return
return "Ungültiger Dateiname."
}
out, err := os.OpenFile(destPath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0o644)
if err != nil {
if os.IsExist(err) {
render(w, r.Context(), views.UploadPage(fmt.Sprintf("Datei '%s' existiert bereits.", safeFilename)))
return
return fmt.Sprintf("Datei '%s' existiert bereits.", safeFilename)
}
log.Printf("upload: create %q failed: %v", destPath, err)
http.Error(w, "Datei konnte nicht gespeichert werden", http.StatusInternalServerError)
return
return "Datei konnte nicht gespeichert werden."
}
defer out.Close()
if _, err := io.Copy(out, file); err != nil {
log.Printf("upload: write %q failed: %v", destPath, err)
_ = os.Remove(destPath)
http.Error(w, "Upload fehlgeschlagen", http.StatusInternalServerError)
return
return "Upload fehlgeschlagen."
}
http.Redirect(w, r, "/", http.StatusSeeOther)
return ""
}
views/pages.templ
+4 -4
View File
@@ -69,16 +69,16 @@ templ LoginPage(errMsg string) {
}
templ UploadPage(errMsg string) {
@Layout("Buch hochladen", "/") {
@Layout("Bücher hochladen", "/") {
<section class="page-head">
<h2>Buch hochladen</h2>
<h2>Bücher hochladen</h2>
</section>
if errMsg != "" {
<p class="error">{ errMsg }</p>
}
<form method="post" action="/upload" enctype="multipart/form-data" class="upload-form">
<label for="book">EPUB auswählen</label>
<input id="book" type="file" name="book" accept=".epub" required />
<label for="book">EPUB(s) auswählen</label>
<input id="book" type="file" name="book" accept=".epub" multiple required />
<button type="submit" class="btn">Hochladen</button>
</form>
}
views/pages_templ.go
+3 -3
View File
@@ -239,7 +239,7 @@ func UploadPage(errMsg string) templ.Component {
}()
}
ctx = templ.InitializeContext(ctx)
templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 14, "<section class=\"page-head\"><h2>Buch hochladen</h2></section>")
templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 14, "<section class=\"page-head\"><h2>Bücher hochladen</h2></section>")
if templ_7745c5c3_Err != nil {
return templ_7745c5c3_Err
}
@@ -262,13 +262,13 @@ func UploadPage(errMsg string) templ.Component {
return templ_7745c5c3_Err
}
}
templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 17, " <form method=\"post\" action=\"/upload\" enctype=\"multipart/form-data\" class=\"upload-form\"><label for=\"book\">EPUB auswählen</label> <input id=\"book\" type=\"file\" name=\"book\" accept=\".epub\" required> <button type=\"submit\" class=\"btn\">Hochladen</button></form>")
templ_7745c5c3_Err = templruntime.WriteString(templ_7745c5c3_Buffer, 17, " <form method=\"post\" action=\"/upload\" enctype=\"multipart/form-data\" class=\"upload-form\"><label for=\"book\">EPUB(s) auswählen</label> <input id=\"book\" type=\"file\" name=\"book\" accept=\".epub\" multiple required> <button type=\"submit\" class=\"btn\">Hochladen</button></form>")
if templ_7745c5c3_Err != nil {
return templ_7745c5c3_Err
}
return nil
})
templ_7745c5c3_Err = Layout("Buch hochladen", "/").Render(templ.WithChildren(ctx, templ_7745c5c3_Var10), templ_7745c5c3_Buffer)
templ_7745c5c3_Err = Layout("Bücher hochladen", "/").Render(templ.WithChildren(ctx, templ_7745c5c3_Var10), templ_7745c5c3_Buffer)
if templ_7745c5c3_Err != nil {
return templ_7745c5c3_Err
}