Beispiel #1
0
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)
}