예제 #1
0
func fetchFileId(server string, fileId string) (filename string, content []byte, e error) {
	fileUrl, lookupError := operation.LookupFileId(server, fileId)
	if lookupError != nil {
		return "", nil, lookupError
	}
	filename, content, e = util.DownloadUrl(fileUrl)
	return
}
예제 #2
0
func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
	if strings.HasSuffix(r.URL.Path, "/") {
		if fs.disableDirListing {
			w.WriteHeader(http.StatusMethodNotAllowed)
			return
		}
		fs.listDirectoryHandler(w, r)
		return
	}

	fileId, err := fs.filer.FindFile(r.URL.Path)
	if err == leveldb.ErrNotFound {
		glog.V(3).Infoln("Not found in db", r.URL.Path)
		w.WriteHeader(http.StatusNotFound)
		return
	}

	urlLocation, err := operation.LookupFileId(fs.master, fileId)
	if err != nil {
		glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
		w.WriteHeader(http.StatusNotFound)
		return
	}
	urlString := urlLocation
	if fs.redirectOnRead {
		http.Redirect(w, r, urlString, http.StatusFound)
		return
	}
	u, _ := url.Parse(urlString)
	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,
	}
	glog.V(3).Infoln("retrieving from", u)
	resp, do_err := util.Do(request)
	if do_err != nil {
		glog.V(0).Infoln("failing to connect to volume server", do_err.Error())
		writeJsonError(w, r, http.StatusInternalServerError, do_err)
		return
	}
	defer resp.Body.Close()
	for k, v := range resp.Header {
		w.Header()[k] = v
	}
	w.WriteHeader(resp.StatusCode)
	io.Copy(w, resp.Body)
}
예제 #3
0
func fetchContent(server string, fileId string) (filename string, content []byte, e error) {
	fileUrl, lookupError := operation.LookupFileId(server, fileId)
	if lookupError != nil {
		return "", nil, lookupError
	}
	var rc io.ReadCloser
	if filename, rc, e = util.DownloadUrl(fileUrl); e != nil {
		return "", nil, e
	}
	content, e = ioutil.ReadAll(rc)
	rc.Close()
	return
}
예제 #4
0
func downloadToFile(server, fileId, saveDir string) error {
	fileUrl, lookupError := operation.LookupFileId(server, fileId)
	if lookupError != nil {
		return lookupError
	}
	filename, rc, err := util.DownloadUrl(fileUrl)
	if err != nil {
		return err
	}
	defer rc.Close()
	if filename == "" {
		filename = fileId
	}
	isFileList := false
	if strings.HasSuffix(filename, "-list") {
		// old command compatible
		isFileList = true
		filename = filename[0 : len(filename)-len("-list")]
	}
	f, err := os.OpenFile(path.Join(saveDir, filename), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, os.ModePerm)
	if err != nil {
		return err
	}
	defer f.Close()
	if isFileList {
		content, err := ioutil.ReadAll(rc)
		if err != nil {
			return err
		}
		fids := strings.Split(string(content), "\n")
		for _, partId := range fids {
			var n int
			_, part, err := fetchContent(*d.server, partId)
			if err == nil {
				n, err = f.Write(part)
			}
			if err == nil && n < len(part) {
				err = io.ErrShortWrite
			}
			if err != nil {
				return err
			}
		}
	} else {
		if _, err = io.Copy(f, rc); err != nil {
			return err
		}

	}
	return nil
}
예제 #5
0
func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
	query := r.URL.Query()
	replication := query.Get("replication")
	if replication == "" {
		replication = fs.defaultReplication
	}
	collection := query.Get("collection")
	if collection == "" {
		collection = fs.collection
	}

	var fileId string
	var err error
	var urlLocation string
	if r.Method == "PUT" {
		buf, _ := ioutil.ReadAll(r.Body)
		r.Body = analogueReader{bytes.NewBuffer(buf)}
		fileName, _, _, _, _, _, _, pe := storage.ParseUpload(r)
		if pe != nil {
			glog.V(0).Infoln("failing to parse post body", pe.Error())
			writeJsonError(w, r, http.StatusInternalServerError, pe)
			return
		}
		//reconstruct http request body for following new request to volume server
		r.Body = analogueReader{bytes.NewBuffer(buf)}

		path := r.URL.Path
		if strings.HasSuffix(path, "/") {
			if fileName != "" {
				path += fileName
			}
		}

		if fileId, err = fs.filer.FindFile(path); err != nil && err != leveldb.ErrNotFound {
			glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
			writeJsonError(w, r, http.StatusInternalServerError, err)
			return
		} else if fileId != "" && err == nil {
			var le error
			urlLocation, le = operation.LookupFileId(fs.master, fileId)
			if le != nil {
				glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, le.Error())
				w.WriteHeader(http.StatusNotFound)
				return
			}
		}
	} else {
		assignResult, ae := operation.Assign(fs.master, 1, replication, collection, query.Get("ttl"))
		if ae != nil {
			glog.V(0).Infoln("failing to assign a file id", ae.Error())
			writeJsonError(w, r, http.StatusInternalServerError, ae)
			return
		}
		fileId = assignResult.Fid
		urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
	}

	u, _ := url.Parse(urlLocation)
	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,
	}
	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, http.StatusInternalServerError, do_err)
		return
	}
	defer resp.Body.Close()
	resp_body, ra_err := ioutil.ReadAll(resp.Body)
	if ra_err != nil {
		glog.V(0).Infoln("failing to upload to volume server", r.RequestURI, ra_err.Error())
		writeJsonError(w, r, http.StatusInternalServerError, 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, http.StatusInternalServerError, unmarshal_err)
		return
	}
	if ret.Error != "" {
		glog.V(0).Infoln("failing to post to volume server", r.RequestURI, ret.Error)
		writeJsonError(w, r, http.StatusInternalServerError, errors.New(ret.Error))
		return
	}
	path := r.URL.Path
	if strings.HasSuffix(path, "/") {
		if ret.Name != "" {
			path += ret.Name
		} else {
			operation.DeleteFile(fs.master, fileId, fs.jwt(fileId)) //clean up
			glog.V(0).Infoln("Can not to write to folder", path, "without a file name!")
			writeJsonError(w, r, http.StatusInternalServerError,
				errors.New("Can not to write to folder "+path+" without a file name"))
			return
		}
	}
	glog.V(4).Infoln("saving", path, "=>", fileId)
	if db_err := fs.filer.CreateFile(path, fileId); db_err != nil {
		operation.DeleteFile(fs.master, fileId, fs.jwt(fileId)) //clean up
		glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
		writeJsonError(w, r, http.StatusInternalServerError, db_err)
		return
	}
	w.WriteHeader(http.StatusCreated)
	w.Write(resp_body)
}