seaweedfs/weed/server/filer_server_handlers_write.go
2016-06-26 10:50:18 +08:00

343 lines
10 KiB
Go

package weed_server
import (
"bytes"
"crypto/md5"
"encoding/base64"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"mime/multipart"
"net/http"
"net/textproto"
"net/url"
"strings"
"github.com/chrislusf/seaweedfs/weed/glog"
"github.com/chrislusf/seaweedfs/weed/operation"
"github.com/chrislusf/seaweedfs/weed/storage"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/syndtr/goleveldb/leveldb"
)
type FilerPostResult struct {
Name string `json:"name,omitempty"`
Size uint32 `json:"size,omitempty"`
Error string `json:"error,omitempty"`
Fid string `json:"fid,omitempty"`
Url string `json:"url,omitempty"`
}
var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
func escapeQuotes(s string) string {
return quoteEscaper.Replace(s)
}
func createFormFile(writer *multipart.Writer, fieldname, filename, mime string) (io.Writer, error) {
h := make(textproto.MIMEHeader)
h.Set("Content-Disposition",
fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
escapeQuotes(fieldname), escapeQuotes(filename)))
if len(mime) == 0 {
mime = "application/octet-stream"
}
h.Set("Content-Type", mime)
return writer.CreatePart(h)
}
func makeFormData(filename, mimeType string, content io.Reader) (formData io.Reader, contentType string, err error) {
buf := new(bytes.Buffer)
writer := multipart.NewWriter(buf)
defer writer.Close()
part, err := createFormFile(writer, "file", filename, mimeType)
if err != nil {
glog.V(0).Infoln(err)
return
}
_, err = io.Copy(part, content)
if err != nil {
glog.V(0).Infoln(err)
return
}
formData = buf
contentType = writer.FormDataContentType()
return
}
func (fs *FilerServer) queryFileInfoByPath(w http.ResponseWriter, r *http.Request, path string) (fileId, urlLocation string, err error) {
if fileId, err = fs.filer.FindFile(path); err != nil && err != leveldb.ErrNotFound {
glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
writeJsonError(w, r, http.StatusInternalServerError, err)
return
} else if fileId != "" && err == nil {
urlLocation, err = operation.LookupFileId(fs.getMasterNode(), fileId)
if err != nil {
glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
w.WriteHeader(http.StatusNotFound)
return
}
}
return
}
func (fs *FilerServer) assignNewFileInfo(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
ar := &operation.VolumeAssignRequest{
Count: 1,
Replication: replication,
Collection: collection,
Ttl: r.URL.Query().Get("ttl"),
}
assignResult, ae := operation.Assign(fs.getMasterNode(), ar)
if ae != nil {
glog.V(0).Infoln("failing to assign a file id", ae.Error())
writeJsonError(w, r, http.StatusInternalServerError, ae)
err = ae
return
}
fileId = assignResult.Fid
urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
return
}
func (fs *FilerServer) multipartUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
//Default handle way for http multipart
if r.Method == "PUT" {
buf, _ := ioutil.ReadAll(r.Body)
r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
fileName, _, _, _, _, _, _, pe := storage.ParseUpload(r)
if pe != nil {
glog.V(0).Infoln("failing to parse post body", pe.Error())
writeJsonError(w, r, http.StatusInternalServerError, pe)
err = pe
return
}
//reconstruct http request body for following new request to volume server
r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
path := r.URL.Path
if strings.HasSuffix(path, "/") {
if fileName != "" {
path += fileName
}
}
fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path)
} else {
fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
}
return
}
func multipartHttpBodyBuilder(w http.ResponseWriter, r *http.Request, fileName string) (err error) {
body, contentType, te := makeFormData(fileName, r.Header.Get("Content-Type"), r.Body)
if te != nil {
glog.V(0).Infoln("S3 protocol to raw seaweed protocol failed", te.Error())
writeJsonError(w, r, http.StatusInternalServerError, te)
err = te
return
}
if body != nil {
switch v := body.(type) {
case *bytes.Buffer:
r.ContentLength = int64(v.Len())
case *bytes.Reader:
r.ContentLength = int64(v.Len())
case *strings.Reader:
r.ContentLength = int64(v.Len())
}
}
r.Header.Set("Content-Type", contentType)
rc, ok := body.(io.ReadCloser)
if !ok && body != nil {
rc = ioutil.NopCloser(body)
}
r.Body = rc
return
}
func checkContentMD5(w http.ResponseWriter, r *http.Request) (err error) {
if contentMD5 := r.Header.Get("Content-MD5"); contentMD5 != "" {
buf, _ := ioutil.ReadAll(r.Body)
//checkMD5
sum := md5.Sum(buf)
fileDataMD5 := base64.StdEncoding.EncodeToString(sum[0:len(sum)])
if strings.ToLower(fileDataMD5) != strings.ToLower(contentMD5) {
glog.V(0).Infof("fileDataMD5 [%s] is not equal to Content-MD5 [%s]", fileDataMD5, contentMD5)
err = fmt.Errorf("MD5 check failed")
writeJsonError(w, r, http.StatusNotAcceptable, err)
return
}
//reconstruct http request body for following new request to volume server
r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
}
return
}
func (fs *FilerServer) monolithicUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
/*
Amazon S3 ref link:[http://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html]
There is a long way to provide a completely compatibility against all Amazon S3 API, I just made
a simple data stream adapter between S3 PUT API and seaweedfs's volume storage Write API
1. The request url format should be http://$host:$port/$bucketName/$objectName
2. bucketName will be mapped to seaweedfs's collection name
3. You could customize and make your enhancement.
*/
lastPos := strings.LastIndex(r.URL.Path, "/")
if lastPos == -1 || lastPos == 0 || lastPos == len(r.URL.Path)-1 {
glog.V(0).Infoln("URL Path [%s] is invalid, could not retrieve file name", r.URL.Path)
err = fmt.Errorf("URL Path is invalid")
writeJsonError(w, r, http.StatusInternalServerError, err)
return
}
if err = checkContentMD5(w, r); err != nil {
return
}
fileName := r.URL.Path[lastPos+1:]
if err = multipartHttpBodyBuilder(w, r, fileName); err != nil {
return
}
secondPos := strings.Index(r.URL.Path[1:], "/") + 1
collection = r.URL.Path[1:secondPos]
path := r.URL.Path
if fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path); err == nil && fileId == "" {
fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
}
return
}
func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
query := r.URL.Query()
replication := query.Get("replication")
if replication == "" {
replication = fs.defaultReplication
}
collection := query.Get("collection")
if collection == "" {
collection = fs.collection
}
var fileId, urlLocation string
var err error
if strings.HasPrefix(r.Header.Get("Content-Type"), "multipart/form-data; boundary=") {
fileId, urlLocation, err = fs.multipartUploadAnalyzer(w, r, replication, collection)
if err != nil {
return
}
} else {
fileId, urlLocation, err = fs.monolithicUploadAnalyzer(w, r, replication, collection)
if err != nil {
return
}
}
u, _ := url.Parse(urlLocation)
glog.V(4).Infoln("post to", u)
request := &http.Request{
Method: r.Method,
URL: u,
Proto: r.Proto,
ProtoMajor: r.ProtoMajor,
ProtoMinor: r.ProtoMinor,
Header: r.Header,
Body: r.Body,
Host: r.Host,
ContentLength: r.ContentLength,
}
resp, do_err := util.Do(request)
if do_err != nil {
glog.V(0).Infoln("failing to connect to volume server", r.RequestURI, do_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, do_err)
return
}
defer resp.Body.Close()
resp_body, ra_err := ioutil.ReadAll(resp.Body)
if ra_err != nil {
glog.V(0).Infoln("failing to upload to volume server", r.RequestURI, ra_err.Error())
writeJsonError(w, r, http.StatusInternalServerError, ra_err)
return
}
glog.V(4).Infoln("post result", string(resp_body))
var ret operation.UploadResult
unmarshal_err := json.Unmarshal(resp_body, &ret)
if unmarshal_err != nil {
glog.V(0).Infoln("failing to read upload resonse", r.RequestURI, string(resp_body))
writeJsonError(w, r, http.StatusInternalServerError, unmarshal_err)
return
}
if ret.Error != "" {
glog.V(0).Infoln("failing to post to volume server", r.RequestURI, ret.Error)
writeJsonError(w, r, http.StatusInternalServerError, errors.New(ret.Error))
return
}
path := r.URL.Path
if strings.HasSuffix(path, "/") {
if ret.Name != "" {
path += ret.Name
} else {
operation.DeleteFile(fs.getMasterNode(), fileId, fs.jwt(fileId)) //clean up
glog.V(0).Infoln("Can not to write to folder", path, "without a file name!")
writeJsonError(w, r, http.StatusInternalServerError,
errors.New("Can not to write to folder "+path+" without a file name"))
return
}
}
// also delete the old fid unless PUT operation
if r.Method != "PUT" {
if oldFid, err := fs.filer.FindFile(path); err == nil {
operation.DeleteFile(fs.getMasterNode(), oldFid, fs.jwt(oldFid))
}
}
glog.V(4).Infoln("saving", path, "=>", fileId)
if db_err := fs.filer.CreateFile(path, fileId); db_err != nil {
operation.DeleteFile(fs.getMasterNode(), fileId, fs.jwt(fileId)) //clean up
glog.V(0).Infof("failing to write %s to filer server : %v", path, db_err)
writeJsonError(w, r, http.StatusInternalServerError, db_err)
return
}
reply := FilerPostResult{
Name: ret.Name,
Size: ret.Size,
Error: ret.Error,
Fid: fileId,
Url: urlLocation,
}
writeJsonQuiet(w, r, http.StatusCreated, reply)
}
// curl -X DELETE http://localhost:8888/path/to
// curl -X DELETE http://localhost:8888/path/to?recursive=true
func (fs *FilerServer) DeleteHandler(w http.ResponseWriter, r *http.Request) {
var err error
var fid string
if strings.HasSuffix(r.URL.Path, "/") {
isRecursive := r.FormValue("recursive") == "true"
err = fs.filer.DeleteDirectory(r.URL.Path, isRecursive)
} else {
fid, err = fs.filer.DeleteFile(r.URL.Path)
if err == nil && fid != "" {
err = operation.DeleteFile(fs.getMasterNode(), fid, fs.jwt(fid))
}
}
if err == nil {
writeJsonQuiet(w, r, http.StatusAccepted, map[string]string{"error": ""})
} else {
glog.V(4).Infoln("deleting", r.URL.Path, ":", err.Error())
writeJsonError(w, r, http.StatusInternalServerError, err)
}
}