package weed_server import ( "bytes" "context" "fmt" "io" "mime" "net/http" "net/url" "path/filepath" "strconv" "strings" "time" "github.com/chrislusf/seaweedfs/weed/filer" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/images" "github.com/chrislusf/seaweedfs/weed/pb/filer_pb" xhttp "github.com/chrislusf/seaweedfs/weed/s3api/http" "github.com/chrislusf/seaweedfs/weed/stats" "github.com/chrislusf/seaweedfs/weed/util" ) func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request) { path := r.URL.Path isForDirectory := strings.HasSuffix(path, "/") if isForDirectory && len(path) > 1 { path = path[:len(path)-1] } entry, err := fs.filer.FindEntry(context.Background(), util.FullPath(path)) if err != nil { if path == "/" { fs.listDirectoryHandler(w, r) return } if err == filer_pb.ErrNotFound { glog.V(1).Infof("Not found %s: %v", path, err) stats.FilerRequestCounter.WithLabelValues("read.notfound").Inc() w.WriteHeader(http.StatusNotFound) } else { glog.Errorf("Internal %s: %v", path, err) stats.FilerRequestCounter.WithLabelValues("read.internalerror").Inc() w.WriteHeader(http.StatusInternalServerError) } return } if entry.IsDirectory() { if fs.option.DisableDirListing { w.WriteHeader(http.StatusMethodNotAllowed) return } fs.listDirectoryHandler(w, r) return } if isForDirectory { w.WriteHeader(http.StatusNotFound) return } // set etag etag := filer.ETagEntry(entry) if ifm := r.Header.Get("If-Match"); ifm != "" && (ifm != "\""+etag+"\"" && ifm != etag) { w.WriteHeader(http.StatusPreconditionFailed) return } w.Header().Set("Accept-Ranges", "bytes") // mime type mimeType := entry.Attr.Mime if mimeType == "" { if ext := filepath.Ext(entry.Name()); ext != "" { mimeType = mime.TypeByExtension(ext) } } if mimeType != "" { w.Header().Set("Content-Type", mimeType) } // if modified since if !entry.Attr.Mtime.IsZero() { w.Header().Set("Last-Modified", entry.Attr.Mtime.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.Before(entry.Attr.Mtime) { w.WriteHeader(http.StatusNotModified) return } } } } // print out the header from extended properties for k, v := range entry.Extended { if !strings.HasPrefix(k, "xattr-") { // "xattr-" prefix is set in filesys.XATTR_PREFIX w.Header().Set(k, string(v)) } } //Seaweed custom header are not visible to Vue or javascript seaweedHeaders := []string{} for header := range w.Header() { if strings.HasPrefix(header, "Seaweed-") { seaweedHeaders = append(seaweedHeaders, header) } } seaweedHeaders = append(seaweedHeaders, "Content-Disposition") w.Header().Set("Access-Control-Expose-Headers", strings.Join(seaweedHeaders, ",")) //set tag count if r.Method == "GET" { tagCount := 0 for k := range entry.Extended { if strings.HasPrefix(k, xhttp.AmzObjectTagging+"-") { tagCount++ } } if tagCount > 0 { w.Header().Set(xhttp.AmzTagCount, strconv.Itoa(tagCount)) } } if inm := r.Header.Get("If-None-Match"); inm == "\""+etag+"\"" { w.WriteHeader(http.StatusNotModified) return } setEtag(w, etag) filename := entry.Name() filename = url.QueryEscape(filename) adjustHeaderContentDisposition(w, r, filename) totalSize := int64(entry.Size()) if r.Method == "HEAD" { w.Header().Set("Content-Length", strconv.FormatInt(totalSize, 10)) return } if rangeReq := r.Header.Get("Range"); rangeReq == "" { ext := filepath.Ext(filename) if len(ext) > 0 { ext = strings.ToLower(ext) } width, height, mode, shouldResize := shouldResizeImages(ext, r) if shouldResize { data, err := filer.ReadAll(fs.filer.MasterClient, entry.Chunks) if err != nil { glog.Errorf("failed to read %s: %v", path, err) w.WriteHeader(http.StatusNotModified) return } rs, _, _ := images.Resized(ext, bytes.NewReader(data), width, height, mode) io.Copy(w, rs) return } } processRangeRequest(r, w, totalSize, mimeType, func(writer io.Writer, offset int64, size int64) error { if offset+size <= int64(len(entry.Content)) { _, err := writer.Write(entry.Content[offset : offset+size]) if err != nil { glog.Errorf("failed to write entry content: %v", err) } return err } chunks := entry.Chunks if entry.IsInRemoteOnly() { dir, name := entry.FullPath.DirAndName() if resp, err := fs.DownloadToLocal(context.Background(), &filer_pb.DownloadToLocalRequest{ Directory: dir, Name: name, }); err != nil { glog.Errorf("DownloadToLocal %s: %v", entry.FullPath, err) return fmt.Errorf("cache %s: %v", entry.FullPath, err) } else { chunks = resp.Entry.Chunks } } err = filer.StreamContent(fs.filer.MasterClient, writer, chunks, offset, size) if err != nil { glog.Errorf("failed to stream content %s: %v", r.URL, err) } return err }) }