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