seaweedfs/weed/server/common.go

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package weed_server
import (
"encoding/json"
"errors"
"fmt"
"io"
"mime/multipart"
"net/http"
"path/filepath"
"strconv"
"strings"
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"time"
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"google.golang.org/grpc"
"github.com/chrislusf/seaweedfs/weed/glog"
"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"
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"github.com/gorilla/mux"
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statik "github.com/rakyll/statik/fs"
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_ "github.com/chrislusf/seaweedfs/weed/statik"
)
var serverStats *stats.ServerStats
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var startTime = time.Now()
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var statikFS http.FileSystem
func init() {
serverStats = stats.NewServerStats()
go serverStats.Start()
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statikFS, _ = statik.New()
}
func writeJson(w http.ResponseWriter, r *http.Request, httpStatus int, obj interface{}) (err error) {
var bytes []byte
if obj != nil {
if r.FormValue("pretty") != "" {
bytes, err = json.MarshalIndent(obj, "", " ")
} else {
bytes, err = json.Marshal(obj)
}
}
if err != nil {
return
}
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if httpStatus >= 400 {
glog.V(0).Infof("response method:%s URL:%s with httpStatus:%d and JSON:%s",
r.Method, r.URL.String(), httpStatus, string(bytes))
}
callback := r.FormValue("callback")
if callback == "" {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(httpStatus)
if httpStatus == http.StatusNotModified {
return
}
_, err = w.Write(bytes)
} else {
w.Header().Set("Content-Type", "application/javascript")
w.WriteHeader(httpStatus)
if httpStatus == http.StatusNotModified {
return
}
if _, err = w.Write([]uint8(callback)); err != nil {
return
}
if _, err = w.Write([]uint8("(")); err != nil {
return
}
fmt.Fprint(w, string(bytes))
if _, err = w.Write([]uint8(")")); err != nil {
return
}
}
return
}
// wrapper for writeJson - just logs errors
func writeJsonQuiet(w http.ResponseWriter, r *http.Request, httpStatus int, obj interface{}) {
if err := writeJson(w, r, httpStatus, obj); err != nil {
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glog.V(0).Infof("error writing JSON status %d: %v", httpStatus, err)
glog.V(1).Infof("JSON content: %+v", obj)
}
}
func writeJsonError(w http.ResponseWriter, r *http.Request, httpStatus int, err error) {
m := make(map[string]interface{})
m["error"] = err.Error()
writeJsonQuiet(w, r, httpStatus, m)
}
func debug(params ...interface{}) {
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glog.V(4).Infoln(params...)
}
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func submitForClientHandler(w http.ResponseWriter, r *http.Request, masterUrl string, grpcDialOption grpc.DialOption) {
m := make(map[string]interface{})
if r.Method != "POST" {
writeJsonError(w, r, http.StatusMethodNotAllowed, errors.New("Only submit via POST!"))
return
}
debug("parsing upload file...")
pu, pe := needle.ParseUpload(r, 256*1024*1024)
if pe != nil {
writeJsonError(w, r, http.StatusBadRequest, pe)
return
}
debug("assigning file id for", pu.FileName)
r.ParseForm()
count := uint64(1)
if r.FormValue("count") != "" {
count, pe = strconv.ParseUint(r.FormValue("count"), 10, 32)
if pe != nil {
writeJsonError(w, r, http.StatusBadRequest, pe)
return
}
}
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ar := &operation.VolumeAssignRequest{
Count: count,
DataCenter: r.FormValue("dataCenter"),
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Replication: r.FormValue("replication"),
Collection: r.FormValue("collection"),
Ttl: r.FormValue("ttl"),
}
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assignResult, ae := operation.Assign(masterUrl, grpcDialOption, ar)
if ae != nil {
writeJsonError(w, r, http.StatusInternalServerError, ae)
return
}
url := "http://" + assignResult.Url + "/" + assignResult.Fid
if pu.ModifiedTime != 0 {
url = url + "?ts=" + strconv.FormatUint(pu.ModifiedTime, 10)
}
debug("upload file to store", url)
uploadResult, err := operation.UploadData(url, pu.FileName, false, pu.Data, pu.IsGzipped, pu.MimeType, pu.PairMap, assignResult.Auth)
if err != nil {
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
m["fileName"] = pu.FileName
m["fid"] = assignResult.Fid
m["fileUrl"] = assignResult.PublicUrl + "/" + assignResult.Fid
m["size"] = pu.OriginalDataSize
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m["eTag"] = uploadResult.ETag
writeJsonQuiet(w, r, http.StatusCreated, m)
return
}
func parseURLPath(path string) (vid, fid, filename, ext string, isVolumeIdOnly bool) {
switch strings.Count(path, "/") {
case 3:
parts := strings.Split(path, "/")
vid, fid, filename = parts[1], parts[2], parts[3]
ext = filepath.Ext(filename)
case 2:
parts := strings.Split(path, "/")
vid, fid = parts[1], parts[2]
dotIndex := strings.LastIndex(fid, ".")
if dotIndex > 0 {
ext = fid[dotIndex:]
fid = fid[0:dotIndex]
}
default:
sepIndex := strings.LastIndex(path, "/")
commaIndex := strings.LastIndex(path[sepIndex:], ",")
if commaIndex <= 0 {
vid, isVolumeIdOnly = path[sepIndex+1:], true
return
}
dotIndex := strings.LastIndex(path[sepIndex:], ".")
vid = path[sepIndex+1 : commaIndex]
fid = path[commaIndex+1:]
ext = ""
if dotIndex > 0 {
fid = path[commaIndex+1 : dotIndex]
ext = path[dotIndex:]
}
}
return
}
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func statsHealthHandler(w http.ResponseWriter, r *http.Request) {
m := make(map[string]interface{})
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m["Version"] = util.Version()
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writeJsonQuiet(w, r, http.StatusOK, m)
}
func statsCounterHandler(w http.ResponseWriter, r *http.Request) {
m := make(map[string]interface{})
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m["Version"] = util.Version()
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m["Counters"] = serverStats
writeJsonQuiet(w, r, http.StatusOK, m)
}
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func statsMemoryHandler(w http.ResponseWriter, r *http.Request) {
m := make(map[string]interface{})
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m["Version"] = util.Version()
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m["Memory"] = stats.MemStat()
writeJsonQuiet(w, r, http.StatusOK, m)
}
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func handleStaticResources(defaultMux *http.ServeMux) {
defaultMux.Handle("/favicon.ico", http.FileServer(statikFS))
defaultMux.Handle("/seaweedfsstatic/", http.StripPrefix("/seaweedfsstatic", http.FileServer(statikFS)))
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}
func handleStaticResources2(r *mux.Router) {
r.Handle("/favicon.ico", http.FileServer(statikFS))
r.PathPrefix("/seaweedfsstatic/").Handler(http.StripPrefix("/seaweedfsstatic", http.FileServer(statikFS)))
}
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func adjustHeaderContentDisposition(w http.ResponseWriter, r *http.Request, filename string) {
if filename != "" {
contentDisposition := "inline"
if r.FormValue("dl") != "" {
if dl, _ := strconv.ParseBool(r.FormValue("dl")); dl {
contentDisposition = "attachment"
}
}
w.Header().Set("Content-Disposition", contentDisposition+`; filename="`+fileNameEscaper.Replace(filename)+`"`)
}
}
func processRangeRequest(r *http.Request, w http.ResponseWriter, totalSize int64, mimeType string, writeFn func(writer io.Writer, offset int64, size int64) error) {
rangeReq := r.Header.Get("Range")
if rangeReq == "" {
w.Header().Set("Content-Length", strconv.FormatInt(totalSize, 10))
if err := writeFn(w, 0, totalSize); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
return
}
//the rest is dealing with partial content request
//mostly copy from src/pkg/net/http/fs.go
ranges, err := parseRange(rangeReq, totalSize)
if err != nil {
http.Error(w, err.Error(), http.StatusRequestedRangeNotSatisfiable)
return
}
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
}
if len(ranges) == 0 {
return
}
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]
w.Header().Set("Content-Length", strconv.FormatInt(ra.length, 10))
w.Header().Set("Content-Range", ra.contentRange(totalSize))
w.WriteHeader(http.StatusPartialContent)
err = writeFn(w, ra.start, ra.length)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
return
}
// process multiple ranges
for _, ra := range ranges {
if ra.start > totalSize {
http.Error(w, "Out of Range", http.StatusRequestedRangeNotSatisfiable)
return
}
}
sendSize := rangesMIMESize(ranges, mimeType, totalSize)
pr, pw := io.Pipe()
mw := multipart.NewWriter(pw)
w.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 = writeFn(part, ra.start, ra.length); e != nil {
pw.CloseWithError(e)
return
}
}
mw.Close()
pw.Close()
}()
if w.Header().Get("Content-Encoding") == "" {
w.Header().Set("Content-Length", strconv.FormatInt(sendSize, 10))
}
w.WriteHeader(http.StatusPartialContent)
if _, err := io.CopyN(w, sendContent, sendSize); err != nil {
http.Error(w, "Internal Error", http.StatusInternalServerError)
return
}
}