func (ms *MasterServer) redirectHandler(w http.ResponseWriter, r *http.Request) {
	vid, _, _, _, _ := parseURLPath(r.URL.Path)
	volumeId, err := storage.NewVolumeId(vid)
	if err != nil {
		debug("parsing error:", err, r.URL.Path)
		return
	}
	machines := ms.Topo.Lookup("", volumeId)
	if machines != nil && machines.Length() > 0 {
		var url string
		if r.URL.RawQuery != "" {
			url = util.NormalizeUrl(machines.PickForRead().PublicUrl) + r.URL.Path + "?" + r.URL.RawQuery
		} else {
			url = util.NormalizeUrl(machines.PickForRead().PublicUrl) + r.URL.Path
		}
		http.Redirect(w, r, url, http.StatusMovedPermanently)
	} else {
		writeJsonError(w, r, http.StatusNotFound, fmt.Errorf("volume id %d not found", volumeId))
	}
}
func (ms *MasterServer) redirectHandler(w http.ResponseWriter, r *http.Request) {
	vid, _, _, _, _ := parseURLPath(r.URL.Path)
	volumeId, err := storage.NewVolumeId(vid)
	if err != nil {
		debug("parsing error:", err, r.URL.Path)
		return
	}
	collection := r.FormValue("collection")
	machines := ms.Topo.Lookup(collection, volumeId)
	if machines != nil && len(machines) > 0 {
		var url string
		if r.URL.RawQuery != "" {
			url = util.NormalizeUrl(machines[rand.Intn(len(machines))].PublicUrl) + r.URL.Path + "?" + r.URL.RawQuery
		} else {
			url = util.NormalizeUrl(machines[rand.Intn(len(machines))].PublicUrl) + r.URL.Path
		}
		http.Redirect(w, r, url, http.StatusMovedPermanently)
	} else {
		writeJsonError(w, r, http.StatusNotFound, fmt.Errorf("volume id %d or collection %s not found", volumeId, collection))
	}
}
Exemple #3
0
func (s *Store) ReadRemoteNeedle(fid *FileId, collection string) (*Needle, error) {
	cacheKey := fid.String()
	if cn, cacheHit := s.needleCache.Get(cacheKey); cacheHit {
		glog.V(2).Infoln("Remote needle cache hit:", fid)
		return cn.(*Needle), nil
	}
	glog.V(2).Infoln("Remote needle cache miss:", fid)

	vid := fid.VolumeId.String()
	lookupResult, err := operation.Lookup(s.GetMaster(), vid, collection)
	glog.V(2).Infoln("volume", vid, "found on", lookupResult, "error", err)
	if err != nil || len(lookupResult.Locations) == 0 {
		return nil, errors.New("lookup error:" + err.Error())
	}
	u, _ := url.Parse(util.NormalizeUrl(lookupResult.Locations.PickForRead().Url))
	u.Path = "/admin/sync/needle"
	args := url.Values{
		"volume": {vid},
		"nid":    {fid.Nid()},
	}
	u.RawQuery = args.Encode()
	req, _ := http.NewRequest("GET", u.String(), nil)
	resp, err := util.HttpDo(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()
	var buf []byte
	if buf, err = ioutil.ReadAll(resp.Body); err != nil {
		return nil, err
	}
	if resp.StatusCode != http.StatusOK {
		errMsg := strconv.Itoa(resp.StatusCode)
		m := map[string]string{}
		if e := json.Unmarshal(buf, &m); e == nil {
			if s, ok := m["error"]; ok {
				errMsg += ", " + s
			}
		}
		return nil, errors.New(errMsg)
	}
	n := &Needle{
		Cookie: fid.Cookie,
		Id:     fid.Key,
	}
	n.Data = buf
	n.DataSize = uint32(len(n.Data))
	if h := resp.Header.Get("Seaweed-Flags"); h != "" {
		if i, err := strconv.ParseInt(h, 16, 64); err == nil {
			n.Flags = byte(i)
		}
	}
	if h := resp.Header.Get("Seaweed-Checksum"); h != "" {
		if i, err := strconv.ParseInt(h, 16, 64); err == nil {
			n.Checksum = CRC(i)
			newChecksum := NewCRC(n.Data)
			if n.Checksum != newChecksum {
				return nil, fmt.Errorf("CRC error! Read remote data corrupted (%x!=%x), fid=%v",
					n.Checksum, newChecksum, fid.String())
			}
		}
	}

	if h := resp.Header.Get("Seaweed-LastModified"); h != "" {
		if i, err := strconv.ParseUint(h, 16, 64); err == nil {
			n.LastModified = i
			n.SetHasLastModifiedDate()
		}
	}
	if h := resp.Header.Get("Seaweed-Name"); h != "" {
		n.Name = []byte(h)
		n.SetHasName()
	}
	if h := resp.Header.Get("Seaweed-Mime"); h != "" {
		n.Mime = []byte(h)
		n.SetHasMime()
	}
	s.needleCache.Add(cacheKey, n)
	return n, nil
}
func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request) {
	vid, nid, filename, ext, _ := parseURLPath(r.URL.Path)
	volumeId, err := storage.NewVolumeId(vid)
	if err != nil {
		glog.V(2).Infoln("parsing error:", err, r.URL.Path)
		w.WriteHeader(http.StatusBadRequest)
		return
	}
	var (
		n *storage.Needle
	)

	fid, err := storage.NewFileIdFromNid(vid, nid)
	if err != nil {
		glog.V(2).Infoln("parsing fid error:", err, r.URL.Path)
		w.WriteHeader(http.StatusBadRequest)
		return
	}
	glog.V(4).Infoln("volume", volumeId, "reading", n)
	if vs.store.HasVolume(volumeId) {
		n, err = vs.store.ReadLocalNeedle(fid)
		glog.V(4).Infoln("read local needle", fid, "error", err)
		if err != nil {
			glog.V(0).Infoln("read local error:", err, r.URL.Path)
			w.WriteHeader(http.StatusNotFound)
			return
		}
	} else if vs.ReadRemoteNeedle {
		n, err = vs.store.ReadRemoteNeedle(fid, r.FormValue("collection"))
		glog.V(4).Infoln("read remote needle", fid, "error", err)
		if err != nil {
			glog.V(0).Infoln("read remote error:", err, ",url path:", r.URL.Path)
			w.WriteHeader(http.StatusNotFound)
			return
		}
	} else if vs.ReadRedirect {
		lookupResult, err := operation.Lookup(vs.GetMasterNode(), volumeId.String(), r.FormValue("collection"))
		glog.V(2).Infoln("volume", volumeId, "found on", lookupResult, "error", err)
		if err == nil && len(lookupResult.Locations) > 0 {
			u, _ := url.Parse(util.NormalizeUrl(lookupResult.Locations.PickForRead().PublicUrl))
			u.Path = r.URL.Path
			http.Redirect(w, r, u.String(), http.StatusMovedPermanently)
		} else {
			glog.V(2).Infoln("lookup error:", err, r.URL.Path)
			w.WriteHeader(http.StatusNotFound)
		}
		return
	} else {
		glog.V(2).Infoln("volume is not local:", err, r.URL.Path)
		w.WriteHeader(http.StatusNotFound)
		return
	}

	if n.LastModified != 0 {
		w.Header().Set("Last-Modified", time.Unix(int64(n.LastModified), 0).UTC().Format(http.TimeFormat))
		if r.Header.Get("If-Modified-Since") != "" {
			if t, parseError := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); parseError == nil {
				if t.Unix() >= int64(n.LastModified) {
					w.WriteHeader(http.StatusNotModified)
					return
				}
			}
		}
	}
	etag := n.Etag()
	if inm := r.Header.Get("If-None-Match"); inm == etag {
		w.WriteHeader(http.StatusNotModified)
		return
	}
	w.Header().Set("Etag", etag)

	if vs.tryHandleChunkedFile(volumeId, n, filename, w, r) {
		return
	}

	if n.NameSize > 0 && filename == "" {
		filename = string(n.Name)
		if ext == "" {
			ext = path.Ext(filename)
		}
	}
	mtype := ""
	if n.MimeSize > 0 {
		mt := string(n.Mime)
		if !strings.HasPrefix(mt, "application/octet-stream") {
			mtype = mt
		}
	}
	needleData := n.Data
	if ext != ".gz" {
		if n.IsGzipped() {
			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
				w.Header().Set("Content-Encoding", "gzip")
			} else {
				if needleData, err = operation.UnGzipData(needleData); err != nil {
					glog.V(0).Infoln("ungzip error:", err, r.URL.Path)
				}
			}
		}
	}
	if ext == ".png" || ext == ".jpg" || ext == ".gif" {
		width, height := 0, 0
		if r.FormValue("width") != "" {
			width, _ = strconv.Atoi(r.FormValue("width"))
		}
		if r.FormValue("height") != "" {
			height, _ = strconv.Atoi(r.FormValue("height"))
		}
		if needleData, _, _, err = images.Resized(ext, needleData, width, height); err != nil {
			glog.V(0).Infoln("resize image error,", err, r.URL.Path)
		}
	}

	if err = writeResponseContent(filename, mtype, bytes.NewReader(needleData), w, r); err != nil {
		glog.V(2).Infoln("response write error:", err, r.URL.Path)
	}
}
func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request) {
	n := new(storage.Needle)
	vid, fid, filename, ext, _ := parseURLPath(r.URL.Path)
	volumeId, err := storage.NewVolumeId(vid)
	if err != nil {
		glog.V(2).Infoln("parsing error:", err, r.URL.Path)
		w.WriteHeader(http.StatusBadRequest)
		return
	}
	err = n.ParsePath(fid)
	if err != nil {
		glog.V(2).Infoln("parsing fid error:", err, r.URL.Path)
		w.WriteHeader(http.StatusBadRequest)
		return
	}

	glog.V(4).Infoln("volume", volumeId, "reading", n)
	if !vs.store.HasVolume(volumeId) {
		if !vs.ReadRedirect {
			glog.V(2).Infoln("volume is not local:", err, r.URL.Path)
			w.WriteHeader(http.StatusNotFound)
			return
		}
		lookupResult, err := operation.Lookup(vs.GetMasterNode(), volumeId.String())
		glog.V(2).Infoln("volume", volumeId, "found on", lookupResult, "error", err)
		if err == nil && len(lookupResult.Locations) > 0 {
			u, _ := url.Parse(util.NormalizeUrl(lookupResult.Locations[0].PublicUrl))
			u.Path = r.URL.Path
			arg := url.Values{}
			if c := r.FormValue("collection"); c != "" {
				arg.Set("collection", c)
			}
			u.RawQuery = arg.Encode()
			http.Redirect(w, r, u.String(), http.StatusMovedPermanently)

		} else {
			glog.V(2).Infoln("lookup error:", err, r.URL.Path)
			w.WriteHeader(http.StatusNotFound)
		}
		return
	}
	cookie := n.Cookie
	count, e := vs.store.ReadVolumeNeedle(volumeId, n)
	glog.V(4).Infoln("read bytes", count, "error", e)
	if e != nil || count <= 0 {
		glog.V(0).Infoln("read error:", e, r.URL.Path)
		w.WriteHeader(http.StatusNotFound)
		return
	}
	defer n.ReleaseMemory()
	if n.Cookie != cookie {
		glog.V(0).Infoln("request", r.URL.Path, "with unmaching cookie seen:", cookie, "expected:", n.Cookie, "from", r.RemoteAddr, "agent", r.UserAgent())
		w.WriteHeader(http.StatusNotFound)
		return
	}
	if n.LastModified != 0 {
		w.Header().Set("Last-Modified", time.Unix(int64(n.LastModified), 0).UTC().Format(http.TimeFormat))
		if r.Header.Get("If-Modified-Since") != "" {
			if t, parseError := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); parseError == nil {
				if t.Unix() >= int64(n.LastModified) {
					w.WriteHeader(http.StatusNotModified)
					return
				}
			}
		}
	}
	etag := n.Etag()
	if inm := r.Header.Get("If-None-Match"); inm == etag {
		w.WriteHeader(http.StatusNotModified)
		return
	}
	w.Header().Set("Etag", etag)

	if vs.tryHandleChunkedFile(n, filename, w, r) {
		return
	}

	if n.NameSize > 0 && filename == "" {
		filename = string(n.Name)
		if ext == "" {
			ext = path.Ext(filename)
		}
	}
	mtype := ""
	if n.MimeSize > 0 {
		mt := string(n.Mime)
		if !strings.HasPrefix(mt, "application/octet-stream") {
			mtype = mt
		}
	}

	if ext != ".gz" {
		if n.IsGzipped() {
			if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
				w.Header().Set("Content-Encoding", "gzip")
			} else {
				if n.Data, err = operation.UnGzipData(n.Data); err != nil {
					glog.V(0).Infoln("ungzip error:", err, r.URL.Path)
				}
			}
		}
	}
	if ext == ".png" || ext == ".jpg" || ext == ".gif" {
		width, height := 0, 0
		if r.FormValue("width") != "" {
			width, _ = strconv.Atoi(r.FormValue("width"))
		}
		if r.FormValue("height") != "" {
			height, _ = strconv.Atoi(r.FormValue("height"))
		}
		n.Data, _, _ = images.Resized(ext, n.Data, width, height)
	}

	if e := writeResponseContent(filename, mtype, bytes.NewReader(n.Data), w, r); e != nil {
		glog.V(2).Infoln("response write error:", e)
	}
}