func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string) { m := make(map[string]interface{}) if r.Method != "POST" { m["error"] = "Only submit via POST!" writeJsonQuiet(w, r, m) return } debug("parsing upload file...") //解析上传文件 fname, data, mimeType, isGzipped, lastModified, _, pe := storage.ParseUpload(r) if pe != nil { writeJsonError(w, r, pe) return } debug("assigning file id for", fname) //为文件分配id assignResult, ae := operation.Assign(masterUrl, 1, r.FormValue("replication"), r.FormValue("collection"), r.FormValue("ttl")) if ae != nil { writeJsonError(w, r, ae) return } url := "http://" + assignResult.PublicUrl + "/" + assignResult.Fid if lastModified != 0 { url = url + "?ts=" + strconv.FormatUint(lastModified, 10) } debug("upload file to store", url) //上传文件 uploadResult, err := operation.Upload(url, fname, bytes.NewReader(data), isGzipped, mimeType) if err != nil { writeJsonError(w, r, err) return } //返回成功后的处理消息 m["fileName"] = fname m["fid"] = assignResult.Fid m["fileUrl"] = assignResult.PublicUrl + "/" + assignResult.Fid m["size"] = uploadResult.Size writeJsonQuiet(w, r, m) return }
func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) { query := r.URL.Query() //获得一个fileId assignResult, ae := operation.Assign(fs.master, 1, query.Get("replication"), fs.collection, query.Get("ttl")) if ae != nil { glog.V(0).Infoln("failing to assign a file id", ae.Error()) writeJsonError(w, r, ae) return } u, _ := url.Parse("http://" + assignResult.PublicUrl + "/" + assignResult.Fid) glog.V(4).Infoln("post to", u) request := &http.Request{ Method: r.Method, URL: u, Proto: r.Proto, ProtoMajor: r.ProtoMajor, ProtoMinor: r.ProtoMinor, Header: r.Header, Body: r.Body, Host: r.Host, ContentLength: r.ContentLength, } //执行写入操作 resp, do_err := util.Do(request) if do_err != nil { glog.V(0).Infoln("failing to connect to volume server", r.RequestURI, do_err.Error()) writeJsonError(w, r, do_err) return } defer resp.Body.Close() resp_body, ra_err := ioutil.ReadAll(resp.Body) //读取失败消息 if ra_err != nil { glog.V(0).Infoln("failing to upload to volume server", r.RequestURI, ra_err.Error()) writeJsonError(w, r, ra_err) return } glog.V(4).Infoln("post result", string(resp_body)) var ret operation.UploadResult unmarshal_err := json.Unmarshal(resp_body, &ret) if unmarshal_err != nil { glog.V(0).Infoln("failing to read upload resonse", r.RequestURI, string(resp_body)) writeJsonError(w, r, unmarshal_err) return } if ret.Error != "" { glog.V(0).Infoln("failing to post to volume server", r.RequestURI, ret.Error) writeJsonError(w, r, errors.New(ret.Error)) return } path := r.URL.Path if strings.HasSuffix(path, "/") { //文件夹 if ret.Name != "" { //有文件名 path += ret.Name } else { operation.DeleteFile(fs.master, assignResult.Fid) //clean up glog.V(0).Infoln("Can not to write to folder", path, "without a file name!") writeJsonError(w, r, errors.New("Can not to write to folder "+path+" without a file name")) return } } glog.V(4).Infoln("saving", path, "=>", assignResult.Fid) //向目录服务添加一新项 if db_err := fs.filer.CreateFile(path, assignResult.Fid); db_err != nil { operation.DeleteFile(fs.master, assignResult.Fid) //clean up glog.V(0).Infoln("failing to write to filer server", r.RequestURI, db_err.Error()) writeJsonError(w, r, db_err) return } w.WriteHeader(http.StatusCreated) }