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87b98711f7
Adding width=xxx or height=xxx, or both, can dynamically resize a gif,jpg,png. But the performance is bad. So, not recommending, but you can use it if you insist. :)
271 lines
7.5 KiB
Go
271 lines
7.5 KiB
Go
package weed_server
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import (
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"bytes"
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"code.google.com/p/weed-fs/go/glog"
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"code.google.com/p/weed-fs/go/operation"
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"code.google.com/p/weed-fs/go/stats"
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"code.google.com/p/weed-fs/go/storage"
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"code.google.com/p/weed-fs/go/topology"
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"github.com/disintegration/imaging"
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"image"
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"image/gif"
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"image/jpeg"
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"image/png"
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"mime"
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"net/http"
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"strconv"
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"strings"
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"time"
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)
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var fileNameEscaper = strings.NewReplacer("\\", "\\\\", "\"", "\\\"")
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func (vs *VolumeServer) storeHandler(w http.ResponseWriter, r *http.Request) {
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switch r.Method {
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case "GET":
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stats.ReadRequest()
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vs.GetOrHeadHandler(w, r, true)
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case "HEAD":
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stats.ReadRequest()
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vs.GetOrHeadHandler(w, r, false)
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case "DELETE":
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stats.DeleteRequest()
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secure(vs.whiteList, vs.DeleteHandler)(w, r)
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case "PUT":
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stats.WriteRequest()
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secure(vs.whiteList, vs.PostHandler)(w, r)
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case "POST":
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stats.WriteRequest()
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secure(vs.whiteList, vs.PostHandler)(w, r)
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}
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}
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func (vs *VolumeServer) GetOrHeadHandler(w http.ResponseWriter, r *http.Request, isGetMethod bool) {
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n := new(storage.Needle)
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vid, fid, filename, ext, _ := parseURLPath(r.URL.Path)
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volumeId, err := storage.NewVolumeId(vid)
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if err != nil {
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glog.V(2).Infoln("parsing error:", err, r.URL.Path)
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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err = n.ParsePath(fid)
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if err != nil {
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glog.V(2).Infoln("parsing fid error:", err, r.URL.Path)
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w.WriteHeader(http.StatusBadRequest)
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return
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}
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glog.V(4).Infoln("volume", volumeId, "reading", n)
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if !vs.store.HasVolume(volumeId) {
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lookupResult, err := operation.Lookup(vs.masterNode, volumeId.String())
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glog.V(2).Infoln("volume", volumeId, "found on", lookupResult, "error", err)
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if err == nil && len(lookupResult.Locations) > 0 {
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http.Redirect(w, r, "http://"+lookupResult.Locations[0].PublicUrl+r.URL.Path, http.StatusMovedPermanently)
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} else {
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glog.V(2).Infoln("lookup error:", err, r.URL.Path)
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w.WriteHeader(http.StatusNotFound)
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}
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return
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}
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cookie := n.Cookie
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count, e := vs.store.Read(volumeId, n)
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glog.V(4).Infoln("read bytes", count, "error", e)
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if e != nil || count <= 0 {
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glog.V(0).Infoln("read error:", e, r.URL.Path)
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if n.Cookie != cookie {
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glog.V(0).Infoln("request", r.URL.Path, "with unmaching cookie seen:", cookie, "expected:", n.Cookie, "from", r.RemoteAddr, "agent", r.UserAgent())
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w.WriteHeader(http.StatusNotFound)
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return
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}
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if n.LastModified != 0 {
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w.Header().Set("Last-Modified", time.Unix(int64(n.LastModified), 0).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.Unix() >= int64(n.LastModified) {
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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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if n.NameSize > 0 && filename == "" {
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filename = string(n.Name)
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dotIndex := strings.LastIndex(filename, ".")
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if dotIndex > 0 {
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ext = filename[dotIndex:]
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}
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}
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mtype := ""
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if ext != "" {
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mtype = mime.TypeByExtension(ext)
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}
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if n.MimeSize > 0 {
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mtype = string(n.Mime)
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}
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if mtype != "" {
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w.Header().Set("Content-Type", mtype)
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}
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if filename != "" {
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w.Header().Set("Content-Disposition", "filename="+fileNameEscaper.Replace(filename))
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}
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if ext != ".gz" {
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if n.IsGzipped() {
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if strings.Contains(r.Header.Get("Accept-Encoding"), "gzip") {
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w.Header().Set("Content-Encoding", "gzip")
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} else {
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if n.Data, err = storage.UnGzipData(n.Data); err != nil {
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glog.V(0).Infoln("lookup error:", err, r.URL.Path)
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}
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}
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}
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}
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if ext == ".png" || ext == ".jpg" || ext == ".gif" {
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if srcImage, _, err := image.Decode(bytes.NewReader(n.Data)); err == nil {
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width, height := 0, 0
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if r.FormValue("width") != "" {
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width, _ = strconv.Atoi(r.FormValue("width"))
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}
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if r.FormValue("height") != "" {
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height, _ = strconv.Atoi(r.FormValue("height"))
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}
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if width != 0 || height != 0 {
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bounds := srcImage.Bounds()
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var dstImage *image.NRGBA
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if width == height && bounds.Dx() != bounds.Dy() {
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dstImage = imaging.Thumbnail(srcImage, width, height, imaging.Lanczos)
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} else {
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dstImage = imaging.Resize(srcImage, width, height, imaging.Lanczos)
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}
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var buf bytes.Buffer
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switch ext {
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case ".png":
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png.Encode(&buf, dstImage)
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case ".jpg":
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jpeg.Encode(&buf, dstImage, nil)
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case ".gif":
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gif.Encode(&buf, dstImage, nil)
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}
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n.Data = buf.Bytes()
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}
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}
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}
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w.Header().Set("Content-Length", strconv.Itoa(len(n.Data)))
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if isGetMethod {
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if _, e = w.Write(n.Data); e != nil {
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glog.V(0).Infoln("response write error:", e)
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}
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}
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}
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func (vs *VolumeServer) PostHandler(w http.ResponseWriter, r *http.Request) {
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if e := r.ParseForm(); e != nil {
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glog.V(0).Infoln("form parse error:", e)
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writeJsonError(w, r, e)
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return
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}
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vid, _, _, _, _ := parseURLPath(r.URL.Path)
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volumeId, ve := storage.NewVolumeId(vid)
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if ve != nil {
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glog.V(0).Infoln("NewVolumeId error:", ve)
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writeJsonError(w, r, ve)
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return
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}
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needle, ne := storage.NewNeedle(r)
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if ne != nil {
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writeJsonError(w, r, ne)
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return
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}
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ret := operation.UploadResult{}
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size, errorStatus := topology.ReplicatedWrite(vs.masterNode, vs.store, volumeId, needle, r)
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if errorStatus == "" {
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w.WriteHeader(http.StatusCreated)
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} else {
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w.WriteHeader(http.StatusInternalServerError)
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ret.Error = errorStatus
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}
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if needle.HasName() {
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ret.Name = string(needle.Name)
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}
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ret.Size = size
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writeJsonQuiet(w, r, ret)
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}
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func (vs *VolumeServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
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n := new(storage.Needle)
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vid, fid, _, _, _ := parseURLPath(r.URL.Path)
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volumeId, _ := storage.NewVolumeId(vid)
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n.ParsePath(fid)
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glog.V(2).Infoln("deleting", n)
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cookie := n.Cookie
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count, ok := vs.store.Read(volumeId, n)
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if ok != nil {
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m := make(map[string]uint32)
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m["size"] = 0
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writeJsonQuiet(w, r, m)
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return
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}
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if n.Cookie != cookie {
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glog.V(0).Infoln("delete", r.URL.Path, "with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
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return
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}
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n.Size = 0
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ret := topology.ReplicatedDelete(vs.masterNode, vs.store, volumeId, n, r)
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if ret != 0 {
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w.WriteHeader(http.StatusAccepted)
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} else {
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w.WriteHeader(http.StatusInternalServerError)
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}
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m := make(map[string]uint32)
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m["size"] = uint32(count)
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writeJsonQuiet(w, r, m)
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}
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//Experts only: takes multiple fid parameters. This function does not propagate deletes to replicas.
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func (vs *VolumeServer) batchDeleteHandler(w http.ResponseWriter, r *http.Request) {
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r.ParseForm()
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var ret []operation.DeleteResult
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for _, fid := range r.Form["fid"] {
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vid, id_cookie, err := operation.ParseFileId(fid)
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if err != nil {
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ret = append(ret, operation.DeleteResult{Fid: fid, Error: err.Error()})
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continue
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}
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n := new(storage.Needle)
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volumeId, _ := storage.NewVolumeId(vid)
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n.ParsePath(id_cookie)
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glog.V(4).Infoln("batch deleting", n)
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cookie := n.Cookie
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if _, err := vs.store.Read(volumeId, n); err != nil {
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ret = append(ret, operation.DeleteResult{Fid: fid, Error: err.Error()})
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continue
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}
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if n.Cookie != cookie {
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ret = append(ret, operation.DeleteResult{Fid: fid, Error: "File Random Cookie does not match."})
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glog.V(0).Infoln("deleting", fid, "with unmaching cookie from ", r.RemoteAddr, "agent", r.UserAgent())
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return
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}
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if size, err := vs.store.Delete(volumeId, n); err != nil {
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ret = append(ret, operation.DeleteResult{Fid: fid, Error: err.Error()})
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} else {
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ret = append(ret, operation.DeleteResult{Fid: fid, Size: int(size)})
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}
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}
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w.WriteHeader(http.StatusAccepted)
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writeJsonQuiet(w, r, ret)
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}
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