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package weed_server
import ( "bytes" "encoding/json" "errors" "fmt" "io" "mime" "net/http" "net/url" "path/filepath" "strconv" "strings" "time"
"github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/images" "github.com/chrislusf/seaweedfs/weed/operation" "github.com/chrislusf/seaweedfs/weed/stats" "github.com/chrislusf/seaweedfs/weed/storage/needle" "github.com/chrislusf/seaweedfs/weed/util" )
var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request) {
stats.VolumeServerRequestCounter.WithLabelValues("get").Inc() start := time.Now() defer func() { stats.VolumeServerRequestHistogram.WithLabelValues("get").Observe(time.Since(start).Seconds()) }()
n := new(needle.Needle) vid, fid, filename, ext, _ := parseURLPath(r.URL.Path)
if !vs.maybeCheckJwtAuthorization(r, vid, fid, false) { writeJsonError(w, r, http.StatusUnauthorized, errors.New("wrong jwt")) return }
volumeId, err := needle.NewVolumeId(vid) if err != nil { glog.V(2).Infof("parsing vid %s: %v", r.URL.Path, err) w.WriteHeader(http.StatusBadRequest) return } err = n.ParsePath(fid) if err != nil { glog.V(2).Infof("parsing fid %s: %v", r.URL.Path, err) w.WriteHeader(http.StatusBadRequest) return }
// glog.V(4).Infoln("volume", volumeId, "reading", n)
hasVolume := vs.store.HasVolume(volumeId) _, hasEcVolume := vs.store.FindEcVolume(volumeId) if !hasVolume && !hasEcVolume { 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.GetMaster(), 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 = fmt.Sprintf("%s/%s,%s", u.Path, vid, fid) 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 var count int if hasVolume { count, err = vs.store.ReadVolumeNeedle(volumeId, n) } else if hasEcVolume { count, err = vs.store.ReadEcShardNeedle(volumeId, n) } // glog.V(4).Infoln("read bytes", count, "error", err)
if err != nil || count < 0 { glog.V(0).Infof("read %s isNormalVolume %v error: %v", r.URL.Path, hasVolume, err) w.WriteHeader(http.StatusNotFound) return } if n.Cookie != cookie { glog.V(0).Infof("request %s with cookie:%x expected:%x from %s agent %s", r.URL.Path, cookie, n.Cookie, r.RemoteAddr, 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 } } } } if inm := r.Header.Get("If-None-Match"); inm == "\""+n.Etag()+"\"" { w.WriteHeader(http.StatusNotModified) return } setEtag(w, n.Etag())
if n.HasPairs() { pairMap := make(map[string]string) err = json.Unmarshal(n.Pairs, &pairMap) if err != nil { glog.V(0).Infoln("Unmarshal pairs error:", err) } for k, v := range pairMap { w.Header().Set(k, v) } }
if vs.tryHandleChunkedFile(n, filename, ext, w, r) { return }
if n.NameSize > 0 && filename == "" { filename = string(n.Name) if ext == "" { ext = filepath.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") { if _, _, _, shouldResize := shouldResizeImages(ext, r); shouldResize { if n.Data, err = util.UnGzipData(n.Data); err != nil { glog.V(0).Infoln("ungzip error:", err, r.URL.Path) } } else { w.Header().Set("Content-Encoding", "gzip") } } else { if n.Data, err = util.UnGzipData(n.Data); err != nil { glog.V(0).Infoln("ungzip error:", err, r.URL.Path) } } } }
rs := conditionallyResizeImages(bytes.NewReader(n.Data), ext, r)
if e := writeResponseContent(filename, mtype, rs, w, r); e != nil { glog.V(2).Infoln("response write error:", e) } }
func (vs *VolumeServer) tryHandleChunkedFile(n *needle.Needle, fileName string, ext string, w http.ResponseWriter, r *http.Request) (processed bool) { if !n.IsChunkedManifest() || r.URL.Query().Get("cm") == "false" { return false }
chunkManifest, e := operation.LoadChunkManifest(n.Data, n.IsGzipped()) if e != nil { glog.V(0).Infof("load chunked manifest (%s) error: %v", r.URL.Path, e) return false } if fileName == "" && chunkManifest.Name != "" { fileName = chunkManifest.Name }
if ext == "" { ext = filepath.Ext(fileName) }
mType := "" if chunkManifest.Mime != "" { mt := chunkManifest.Mime if !strings.HasPrefix(mt, "application/octet-stream") { mType = mt } }
w.Header().Set("X-File-Store", "chunked")
chunkedFileReader := operation.NewChunkedFileReader(chunkManifest.Chunks, vs.GetMaster()) defer chunkedFileReader.Close()
rs := conditionallyResizeImages(chunkedFileReader, ext, r)
if e := writeResponseContent(fileName, mType, rs, w, r); e != nil { glog.V(2).Infoln("response write error:", e) } return true }
func conditionallyResizeImages(originalDataReaderSeeker io.ReadSeeker, ext string, r *http.Request) io.ReadSeeker { rs := originalDataReaderSeeker
width, height, mode, shouldResize := shouldResizeImages(ext, r) if shouldResize { rs, _, _ = images.Resized(ext, originalDataReaderSeeker, width, height, mode) } return rs }
func shouldResizeImages(ext string, r *http.Request) (width, height int, mode string, shouldResize bool) { if len(ext) > 0 { ext = strings.ToLower(ext) } if ext == ".png" || ext == ".jpg" || ext == ".jpeg" || ext == ".gif" { if r.FormValue("width") != "" { width, _ = strconv.Atoi(r.FormValue("width")) } if r.FormValue("height") != "" { height, _ = strconv.Atoi(r.FormValue("height")) } } mode = r.FormValue("mode") shouldResize = width > 0 || height > 0 return }
func writeResponseContent(filename, mimeType string, rs io.ReadSeeker, w http.ResponseWriter, r *http.Request) error { totalSize, e := rs.Seek(0, 2) if mimeType == "" { if ext := filepath.Ext(filename); ext != "" { mimeType = mime.TypeByExtension(ext) } } if mimeType != "" { w.Header().Set("Content-Type", mimeType) } w.Header().Set("Accept-Ranges", "bytes")
if r.Method == "HEAD" { w.Header().Set("Content-Length", strconv.FormatInt(totalSize, 10)) return nil }
adjustHeadersAfterHEAD(w, r, filename)
processRangeRequest(r, w, totalSize, mimeType, func(writer io.Writer, offset int64, size int64) error { if _, e = rs.Seek(offset, 0); e != nil { return e } _, e = io.CopyN(writer, rs, size) return e }) return nil }
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