mirror of
https://github.com/chrislusf/seaweedfs
synced 2024-05-03 01:50:04 +02:00
367 lines
11 KiB
Go
367 lines
11 KiB
Go
package weed_server
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import (
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"bytes"
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"context"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"mime"
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"mime/multipart"
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"net/http"
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"net/url"
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"path"
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"strconv"
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"strings"
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"time"
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"github.com/valyala/fasthttp"
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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/operation"
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"github.com/chrislusf/seaweedfs/weed/stats"
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"github.com/chrislusf/seaweedfs/weed/storage/needle"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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func (vs *VolumeServer) fastGetOrHeadHandler(ctx *fasthttp.RequestCtx) {
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stats.VolumeServerRequestCounter.WithLabelValues("get").Inc()
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start := time.Now()
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defer func() { stats.VolumeServerRequestHistogram.WithLabelValues("get").Observe(time.Since(start).Seconds()) }()
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requestPath := string(ctx.Path())
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n := new(needle.Needle)
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vid, fid, filename, ext, _ := parseURLPath(requestPath)
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if !vs.maybeCheckJwtAuthorization(ctx, vid, fid, false) {
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writeJsonError(ctx, http.StatusUnauthorized, errors.New("wrong jwt"))
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return
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}
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volumeId, err := needle.NewVolumeId(vid)
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if err != nil {
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glog.V(2).Infof("parsing volumd id %s error: %v", err, requestPath)
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ctx.SetStatusCode(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).Infof("parsing fid %s error: %v", err, requestPath)
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ctx.SetStatusCode(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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hasVolume := vs.store.HasVolume(volumeId)
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_, hasEcVolume := vs.store.FindEcVolume(volumeId)
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if !hasVolume && !hasEcVolume {
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if !vs.ReadRedirect {
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glog.V(2).Infoln("volume is not local:", err, requestPath)
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ctx.SetStatusCode(http.StatusNotFound)
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return
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}
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lookupResult, err := operation.Lookup(vs.GetMaster(), 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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u, _ := url.Parse(util.NormalizeUrl(lookupResult.Locations[0].PublicUrl))
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u.Path = fmt.Sprintf("%s/%s,%s", u.Path, vid, fid)
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arg := url.Values{}
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if c := ctx.FormValue("collection"); c != nil {
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arg.Set("collection", string(c))
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}
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u.RawQuery = arg.Encode()
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ctx.Redirect(u.String(), http.StatusMovedPermanently)
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} else {
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glog.V(2).Infof("lookup %s error: %v", requestPath, err)
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ctx.SetStatusCode(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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var count int
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if hasVolume {
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count, err = vs.store.ReadVolumeNeedle(volumeId, n)
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} else if hasEcVolume {
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count, err = vs.store.ReadEcShardNeedle(context.Background(), volumeId, n)
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}
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// glog.V(4).Infoln("read bytes", count, "error", err)
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if err != nil || count < 0 {
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glog.V(0).Infof("read %s isNormalVolume %v error: %v", requestPath, hasVolume, err)
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ctx.SetStatusCode(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).Infof("request %s with cookie:%x expected:%x agent %s", requestPath, cookie, n.Cookie, string(ctx.UserAgent()))
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ctx.SetStatusCode(http.StatusNotFound)
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return
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}
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if n.LastModified != 0 {
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ctx.Response.Header.Set("Last-Modified", time.Unix(int64(n.LastModified), 0).UTC().Format(http.TimeFormat))
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if ctx.Response.Header.Peek("If-Modified-Since") != nil {
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if t, parseError := time.Parse(http.TimeFormat, string(ctx.Response.Header.Peek("If-Modified-Since"))); parseError == nil {
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if t.Unix() >= int64(n.LastModified) {
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ctx.SetStatusCode(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 inm := ctx.Response.Header.Peek("If-None-Match"); inm != nil && string(inm) == "\""+n.Etag()+"\"" {
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ctx.SetStatusCode(http.StatusNotModified)
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return
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}
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eTagMd5 := ctx.Response.Header.Peek("ETag-MD5")
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if eTagMd5 != nil && string(eTagMd5) == "True" {
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fastSetEtag(ctx, n.MD5())
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} else {
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fastSetEtag(ctx, n.Etag())
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}
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if n.HasPairs() {
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pairMap := make(map[string]string)
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err = json.Unmarshal(n.Pairs, &pairMap)
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if err != nil {
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glog.V(0).Infoln("Unmarshal pairs error:", err)
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}
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for k, v := range pairMap {
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ctx.Response.Header.Set(k, v)
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}
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}
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if vs.fastTryHandleChunkedFile(n, filename, ctx) {
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return
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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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if ext == "" {
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ext = path.Ext(filename)
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}
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}
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mtype := ""
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if n.MimeSize > 0 {
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mt := string(n.Mime)
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if !strings.HasPrefix(mt, "application/octet-stream") {
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mtype = mt
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}
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}
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if ext != ".gz" {
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if n.IsGzipped() {
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acceptEncoding := ctx.Request.Header.Peek("Accept-Encoding")
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if acceptEncoding != nil && strings.Contains(string(acceptEncoding), "gzip") {
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ctx.Response.Header.Set("Content-Encoding", "gzip")
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} else {
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if n.Data, err = util.UnGzipData(n.Data); err != nil {
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glog.V(0).Infoln("ungzip error:", err, requestPath)
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}
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}
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}
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}
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rs := fastConditionallyResizeImages(bytes.NewReader(n.Data), ext, ctx)
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if e := fastWriteResponseContent(filename, mtype, rs, ctx); e != nil {
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glog.V(2).Infoln("response write error:", e)
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}
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}
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func (vs *VolumeServer) fastTryHandleChunkedFile(n *needle.Needle, fileName string, ctx *fasthttp.RequestCtx) (processed bool) {
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if !n.IsChunkedManifest() || string(ctx.FormValue("cm")) == "false" {
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return false
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}
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chunkManifest, e := operation.LoadChunkManifest(n.Data, n.IsGzipped())
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if e != nil {
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glog.V(0).Infof("load chunked manifest (%s) error: %v", string(ctx.Path()), e)
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return false
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}
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if fileName == "" && chunkManifest.Name != "" {
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fileName = chunkManifest.Name
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}
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ext := path.Ext(fileName)
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mType := ""
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if chunkManifest.Mime != "" {
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mt := chunkManifest.Mime
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if !strings.HasPrefix(mt, "application/octet-stream") {
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mType = mt
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}
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}
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ctx.Response.Header.Set("X-File-Store", "chunked")
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chunkedFileReader := &operation.ChunkedFileReader{
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Manifest: chunkManifest,
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Master: vs.GetMaster(),
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}
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defer chunkedFileReader.Close()
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rs := fastConditionallyResizeImages(chunkedFileReader, ext, ctx)
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if e := fastWriteResponseContent(fileName, mType, rs, ctx); e != nil {
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glog.V(2).Infoln("response write error:", e)
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}
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return true
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}
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func fastConditionallyResizeImages(originalDataReaderSeeker io.ReadSeeker, ext string, ctx *fasthttp.RequestCtx) io.ReadSeeker {
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rs := originalDataReaderSeeker
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if len(ext) > 0 {
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ext = strings.ToLower(ext)
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}
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if ext == ".png" || ext == ".jpg" || ext == ".jpeg" || ext == ".gif" {
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width, height := 0, 0
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formWidth, formHeight := ctx.FormValue("width"), ctx.FormValue("height")
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if formWidth != nil {
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width, _ = strconv.Atoi(string(formWidth))
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}
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if formHeight != nil {
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height, _ = strconv.Atoi(string(formHeight))
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}
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formMode := ctx.FormValue("mode")
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rs, _, _ = images.Resized(ext, originalDataReaderSeeker, width, height, string(formMode))
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}
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return rs
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}
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func fastWriteResponseContent(filename, mimeType string, rs io.ReadSeeker, ctx *fasthttp.RequestCtx) error {
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totalSize, e := rs.Seek(0, 2)
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if mimeType == "" {
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if ext := path.Ext(filename); 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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ctx.Response.Header.Set("Content-Type", mimeType)
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}
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if filename != "" {
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contentDisposition := "inline"
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dlFormValue := ctx.FormValue("dl")
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if dlFormValue != nil {
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if dl, _ := strconv.ParseBool(string(dlFormValue)); dl {
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contentDisposition = "attachment"
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}
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}
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ctx.Response.Header.Set("Content-Disposition", contentDisposition+`; filename="`+fileNameEscaper.Replace(filename)+`"`)
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}
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ctx.Response.Header.Set("Accept-Ranges", "bytes")
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if ctx.IsHead() {
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ctx.Response.Header.Set("Content-Length", strconv.FormatInt(totalSize, 10))
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return nil
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}
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rangeReq := ctx.FormValue("Range")
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if rangeReq == nil {
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ctx.Response.Header.Set("Content-Length", strconv.FormatInt(totalSize, 10))
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if _, e = rs.Seek(0, 0); e != nil {
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return e
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}
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_, e = io.Copy(ctx.Response.BodyWriter(), rs)
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return e
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}
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//the rest is dealing with partial content request
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//mostly copy from src/pkg/net/http/fs.go
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ranges, err := parseRange(string(rangeReq), totalSize)
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if err != nil {
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ctx.Response.SetStatusCode(http.StatusRequestedRangeNotSatisfiable)
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ctxError(ctx, err.Error(), http.StatusRequestedRangeNotSatisfiable)
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return nil
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}
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if sumRangesSize(ranges) > totalSize {
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// The total number of bytes in all the ranges
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// is larger than the size of the file by
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// itself, so this is probably an attack, or a
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// dumb client. Ignore the range request.
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return nil
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}
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if len(ranges) == 0 {
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return nil
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}
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if len(ranges) == 1 {
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// RFC 2616, Section 14.16:
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// "When an HTTP message includes the content of a single
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// range (for example, a response to a request for a
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// single range, or to a request for a set of ranges
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// that overlap without any holes), this content is
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// transmitted with a Content-Range header, and a
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// Content-Length header showing the number of bytes
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// actually transferred.
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// ...
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// A response to a request for a single range MUST NOT
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// be sent using the multipart/byteranges media type."
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ra := ranges[0]
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ctx.Response.Header.Set("Content-Length", strconv.FormatInt(ra.length, 10))
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ctx.Response.Header.Set("Content-Range", ra.contentRange(totalSize))
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ctx.Response.SetStatusCode(http.StatusPartialContent)
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if _, e = rs.Seek(ra.start, 0); e != nil {
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return e
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}
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_, e = io.CopyN(ctx.Response.BodyWriter(), rs, ra.length)
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return e
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}
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// process multiple ranges
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for _, ra := range ranges {
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if ra.start > totalSize {
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ctxError(ctx, "Out of Range", http.StatusRequestedRangeNotSatisfiable)
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return nil
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}
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}
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sendSize := rangesMIMESize(ranges, mimeType, totalSize)
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pr, pw := io.Pipe()
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mw := multipart.NewWriter(pw)
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ctx.Response.Header.Set("Content-Type", "multipart/byteranges; boundary="+mw.Boundary())
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sendContent := pr
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defer pr.Close() // cause writing goroutine to fail and exit if CopyN doesn't finish.
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go func() {
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for _, ra := range ranges {
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part, e := mw.CreatePart(ra.mimeHeader(mimeType, totalSize))
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if e != nil {
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pw.CloseWithError(e)
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return
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}
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if _, e = rs.Seek(ra.start, 0); e != nil {
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pw.CloseWithError(e)
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return
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}
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if _, e = io.CopyN(part, rs, ra.length); e != nil {
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pw.CloseWithError(e)
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return
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}
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}
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mw.Close()
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pw.Close()
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}()
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if ctx.Response.Header.Peek("Content-Encoding") == nil {
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ctx.Response.Header.Set("Content-Length", strconv.FormatInt(sendSize, 10))
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}
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ctx.Response.Header.SetStatusCode(http.StatusPartialContent)
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_, e = io.CopyN(ctx.Response.BodyWriter(), sendContent, sendSize)
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return e
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}
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func fastSetEtag(ctx *fasthttp.RequestCtx, etag string) {
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if etag != "" {
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if strings.HasPrefix(etag, "\"") {
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ctx.Response.Header.Set("ETag", etag)
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} else {
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ctx.Response.Header.Set("ETag", "\""+etag+"\"")
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}
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}
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}
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func ctxError(ctx *fasthttp.RequestCtx, error string, code int) {
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ctx.Response.Header.Set("Content-Type", "text/plain; charset=utf-8")
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ctx.Response.Header.Set("X-Content-Type-Options", "nosniff")
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ctx.Response.SetStatusCode(code)
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fmt.Fprintln(ctx.Response.BodyWriter(), error)
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}
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