mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-07-01 22:56:38 +02:00
135 lines
3.4 KiB
Go
135 lines
3.4 KiB
Go
package weed_server
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import (
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"bytes"
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"context"
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"io"
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"mime"
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"net/http"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"github.com/chrislusf/seaweedfs/weed/filer2"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/images"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/stats"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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func (fs *FilerServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
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path := r.URL.Path
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isForDirectory := strings.HasSuffix(path, "/")
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if isForDirectory && len(path) > 1 {
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path = path[:len(path)-1]
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}
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entry, err := fs.filer.FindEntry(context.Background(), util.FullPath(path))
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if err != nil {
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if path == "/" {
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fs.listDirectoryHandler(w, r)
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return
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}
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if err == filer_pb.ErrNotFound {
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glog.V(1).Infof("Not found %s: %v", path, err)
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stats.FilerRequestCounter.WithLabelValues("read.notfound").Inc()
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w.WriteHeader(http.StatusNotFound)
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} else {
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glog.V(0).Infof("Internal %s: %v", path, err)
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stats.FilerRequestCounter.WithLabelValues("read.internalerror").Inc()
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w.WriteHeader(http.StatusInternalServerError)
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}
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return
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}
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if entry.IsDirectory() {
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if fs.option.DisableDirListing {
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w.WriteHeader(http.StatusMethodNotAllowed)
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return
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}
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fs.listDirectoryHandler(w, r)
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return
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}
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if isForDirectory {
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if len(entry.Chunks) == 0 {
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glog.V(1).Infof("no file chunks for %s, attr=%+v", path, entry.Attr)
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stats.FilerRequestCounter.WithLabelValues("read.nocontent").Inc()
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w.WriteHeader(http.StatusNoContent)
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return
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}
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w.Header().Set("Accept-Ranges", "bytes")
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w.Header().Set("Last-Modified", entry.Attr.Mtime.Format(http.TimeFormat))
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// mime type
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mimeType := entry.Attr.Mime
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if mimeType == "" {
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if ext := filepath.Ext(entry.Name()); ext != "" {
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mimeType = mime.TypeByExtension(ext)
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}
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}
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if mimeType != "" {
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w.Header().Set("Content-Type", mimeType)
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}
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// if modified since
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if !entry.Attr.Mtime.IsZero() {
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w.Header().Set("Last-Modified", entry.Attr.Mtime.UTC().Format(http.TimeFormat))
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if r.Header.Get("If-Modified-Since") != "" {
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if t, parseError := time.Parse(http.TimeFormat, r.Header.Get("If-Modified-Since")); parseError == nil {
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if t.After(entry.Attr.Mtime) {
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w.WriteHeader(http.StatusNotModified)
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return
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}
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}
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}
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}
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// set etag
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etag := filer2.ETagEntry(entry)
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if inm := r.Header.Get("If-None-Match"); inm == "\""+etag+"\"" {
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w.WriteHeader(http.StatusNotModified)
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return
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}
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setEtag(w, etag)
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if r.Method == "HEAD" {
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w.Header().Set("Content-Length", strconv.FormatInt(int64(filer2.TotalSize(entry.Chunks)), 10))
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return
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}
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filename := entry.Name()
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adjustHeadersAfterHEAD(w, r, filename)
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totalSize := int64(filer2.TotalSize(entry.Chunks))
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if rangeReq := r.Header.Get("Range"); rangeReq == "" {
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ext := filepath.Ext(filename)
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width, height, mode, shouldResize := shouldResizeImages(ext, r)
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if shouldResize {
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data, err := filer2.ReadAll(fs.filer.MasterClient, entry.Chunks)
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if err != nil {
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glog.Errorf("failed to read %s: %v", path, err)
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w.WriteHeader(http.StatusNotModified)
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return
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}
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rs, _, _ := images.Resized(ext, bytes.NewReader(data), width, height, mode)
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io.Copy(w, rs)
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return
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}
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}
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processRangeRequest(r, w, totalSize, mimeType, func(writer io.Writer, offset int64, size int64) error {
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return filer2.StreamContent(fs.filer.MasterClient, writer, entry.Chunks, offset, size)
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})
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}
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