Increase default max upload size to 5GB

main.go

@@ -27,7 +27,12 @@ const idLength = 8
 const idCharset = "abcdefghijklmnopqrstuvwxyz0123456789"
 
 // defaultMaxUploadSize is used when MAX_UPLOAD_SIZE is not set.
-const defaultMaxUploadSize int64 = 32 << 20 // 32MB
+const defaultMaxUploadSize int64 = 5 << 30 // 5GB
+
+// maxMultipartMemory caps how much of a multipart upload is buffered in
+// memory before spilling to temporary files on disk, regardless of
+// maxUploadSize.
+const maxMultipartMemory int64 = 32 << 20 // 32MB
 
 var indexHTML *template.Template
 var maxUploadSize int64 = defaultMaxUploadSize
@@ -219,8 +224,8 @@ func handleMultipartUpload(w http.ResponseWriter, r *http.Request, start time.Ti
 	r.Body = http.MaxBytesReader(w, r.Body, maxUploadSize)
 
 	memoryLimit := maxUploadSize
-	if memoryLimit > defaultMaxUploadSize {
-		memoryLimit = defaultMaxUploadSize
+	if memoryLimit > maxMultipartMemory {
+		memoryLimit = maxMultipartMemory
 	}
 
 	if err := r.ParseMultipartForm(memoryLimit); err != nil {