func (u *Upload) monolithicUpload(w http.ResponseWriter, req *http.Request) {
length := req.Header.Get(UPLOAD_HEADER_CONTENT_LENGTH)
if length == "" {
panic(fmt.Errorf("'%s' must be set in the header for a monolithic upload", UPLOAD_HEADER_CONTENT_LENGTH))
}
nlen, err := strconv.ParseInt(length, 10, 64)
location := req.Header.Get(UPLOAD_HEADER_LOCATION)
if location == "" {
panic(fmt.Errorf("'%s' must be set in the header for a monolithic upload", UPLOAD_HEADER_LOCATION))
}
vars := mux.Vars(req)
token, _ := vars["token"]
digest := req.URL.Query().Get("digest")
tmpFile := u.makeTempFilePath(location, token)
if !lib.IsFile(tmpFile) {
w.WriteHeader(http.StatusBadRequest)
fmt.Fprintf(w, "cannot find the temporary file at %s, have you started a upload yet?", tmpFile)
return
}
f, err := os.OpenFile(tmpFile, os.O_WRONLY, 0666)
if err != nil {
panic(fmt.Errorf("cannot open the file[%s], %v", tmpFile, err))
}
deleteFile := func() {
os.Remove(tmpFile)
}
n, err := io.Copy(f, req.Body)
if err != nil {
defer deleteFile()
panic(fmt.Errorf("failed to write to %s, %v", tmpFile, err))
}
if n != nlen {
defer deleteFile()
panic(fmt.Errorf("the file size[%d] is not matching '%s'[%d]", n, UPLOAD_HEADER_CONTENT_LENGTH, nlen))
}
if err := os.Rename(tmpFile, location); err != nil {
defer deleteFile()
panic(fmt.Errorf("failed rename the file[%s] to %s, %v", tmpFile, location, err))
}
sum := lib.Md5(location)
if sum != digest {
defer deleteFile()
panic(fmt.Errorf("corrupted file; expected MD5[%s] but got %s", digest, sum))
}
w.WriteHeader(http.StatusCreated)
}
func (u *Upload) start(w http.ResponseWriter, req *http.Request) {
location := req.Header.Get(UPLOAD_HEADER_LOCATION)
if location == "" {
panic(fmt.Errorf("'%s' must be set in the header for starting a upload", UPLOAD_HEADER_LOCATION))
} else if !path.IsAbs(location) {
panic(fmt.Errorf("%s[%s] must be an absolute path", UPLOAD_HEADER_LOCATION, location))
}
digest := req.Header.Get(UPLOAD_HEADER_DIGEST)
if digest == "" {
panic(fmt.Errorf("'%s' must be set in the header for starting a upload", UPLOAD_HEADER_DIGEST))
}
if lib.IsFile(location) {
if sum := lib.Md5(location); sum == digest {
// for existing and same file, don't upload it
w.WriteHeader(http.StatusNotModified)
return
}
}
if err := os.MkdirAll(path.Dir(location), os.ModeDir); err != nil {
panic(fmt.Errorf("cannot create directory for the file[%s], %v", location, err))
}
token := lib.RandomString()
tmpFile := u.makeTempFilePath(location, token)
f, err := os.Create(tmpFile)
if err != nil {
panic(fmt.Errorf("cannot create the file[%s], %v", tmpFile, err))
}
f.Close()
w.Header().Add(UPLOAD_HEADER_URL, Url(fmt.Sprintf("/upload/%s", token)).String())
w.Header().Add(UPLOAD_HEADER_TOKEN, token)
w.WriteHeader(http.StatusAccepted)
}