mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
Merge pull request #314 from hxiaodon/master
made a little change for Amazon S3 API's compatibility(v2)
This commit is contained in:
Chris Lu
commit
e416679cea
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@ -2,10 +2,16 @@ package weed_server
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import (
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"bytes"
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"crypto/md5"
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"encoding/base64"
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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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"io/ioutil"
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"mime/multipart"
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"net/http"
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"net/textproto"
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"net/url"
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"strings"
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@ -16,13 +22,6 @@ import (
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"github.com/syndtr/goleveldb/leveldb"
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)
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type analogueReader struct {
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*bytes.Buffer
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}
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// So that it implements the io.ReadCloser interface
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func (m analogueReader) Close() error { return nil }
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type FilerPostResult struct {
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Name string `json:"name,omitempty"`
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Size uint32 `json:"size,omitempty"`
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@ -31,6 +30,186 @@ type FilerPostResult struct {
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Url string `json:"url,omitempty"`
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}
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var quoteEscaper = strings.NewReplacer("\\", "\\\\", `"`, "\\\"")
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func escapeQuotes(s string) string {
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return quoteEscaper.Replace(s)
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}
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func createFormFile(writer *multipart.Writer, fieldname, filename, mime string) (io.Writer, error) {
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h := make(textproto.MIMEHeader)
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h.Set("Content-Disposition",
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fmt.Sprintf(`form-data; name="%s"; filename="%s"`,
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escapeQuotes(fieldname), escapeQuotes(filename)))
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if len(mime) == 0 {
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mime = "application/octet-stream"
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}
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h.Set("Content-Type", mime)
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return writer.CreatePart(h)
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}
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func makeFormData(filename, mimeType string, content io.Reader) (formData io.Reader, contentType string, err error) {
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buf := new(bytes.Buffer)
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writer := multipart.NewWriter(buf)
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defer writer.Close()
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part, err := createFormFile(writer, "file", filename, mimeType)
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if err != nil {
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glog.V(0).Infoln(err)
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return
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}
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_, err = io.Copy(part, content)
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if err != nil {
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glog.V(0).Infoln(err)
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return
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}
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formData = buf
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contentType = writer.FormDataContentType()
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return
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}
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func (fs *FilerServer) queryFileInfoByPath(w http.ResponseWriter, r *http.Request, path string) (fileId, urlLocation string, err error) {
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if fileId, err = fs.filer.FindFile(path); err != nil && err != leveldb.ErrNotFound {
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glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, err)
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return
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} else if fileId != "" && err == nil {
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urlLocation, err = operation.LookupFileId(fs.getMasterNode(), fileId)
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if err != nil {
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glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, err.Error())
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w.WriteHeader(http.StatusNotFound)
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return
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}
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}
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return
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}
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func (fs *FilerServer) assignNewFileInfo(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
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assignResult, ae := operation.Assign(fs.getMasterNode(), 1, replication, collection, r.URL.Query().Get("ttl"))
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if ae != nil {
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glog.V(0).Infoln("failing to assign a file id", ae.Error())
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writeJsonError(w, r, http.StatusInternalServerError, ae)
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err = ae
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return
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}
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fileId = assignResult.Fid
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urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
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return
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}
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func (fs *FilerServer) multipartUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
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//Default handle way for http multipart
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if r.Method == "PUT" {
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buf, _ := ioutil.ReadAll(r.Body)
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r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
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fileName, _, _, _, _, _, _, pe := storage.ParseUpload(r)
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if pe != nil {
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glog.V(0).Infoln("failing to parse post body", pe.Error())
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writeJsonError(w, r, http.StatusInternalServerError, pe)
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err = pe
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return
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}
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//reconstruct http request body for following new request to volume server
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r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
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path := r.URL.Path
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if strings.HasSuffix(path, "/") {
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if fileName != "" {
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path += fileName
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}
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}
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fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path)
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} else {
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fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
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}
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return
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}
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func multipartHttpBodyBuilder(w http.ResponseWriter, r *http.Request, fileName string) (err error) {
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body, contentType, te := makeFormData(fileName, r.Header.Get("Content-Type"), r.Body)
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if te != nil {
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glog.V(0).Infoln("S3 protocol to raw seaweed protocol failed", te.Error())
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writeJsonError(w, r, http.StatusInternalServerError, te)
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err = te
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return
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}
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if body != nil {
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switch v := body.(type) {
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case *bytes.Buffer:
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r.ContentLength = int64(v.Len())
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case *bytes.Reader:
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r.ContentLength = int64(v.Len())
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case *strings.Reader:
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r.ContentLength = int64(v.Len())
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}
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}
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r.Header.Set("Content-Type", contentType)
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rc, ok := body.(io.ReadCloser)
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if !ok && body != nil {
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rc = ioutil.NopCloser(body)
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}
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r.Body = rc
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return
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}
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func checkContentMD5(w http.ResponseWriter, r *http.Request) (err error) {
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if contentMD5 := r.Header.Get("Content-MD5"); contentMD5 != "" {
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buf, _ := ioutil.ReadAll(r.Body)
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//checkMD5
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sum := md5.Sum(buf)
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fileDataMD5 := base64.StdEncoding.EncodeToString(sum[0:len(sum)])
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if strings.ToLower(fileDataMD5) != strings.ToLower(contentMD5) {
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glog.V(0).Infof("fileDataMD5 [%s] is not equal to Content-MD5 [%s]", fileDataMD5, contentMD5)
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err = fmt.Errorf("MD5 check failed")
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writeJsonError(w, r, http.StatusNotAcceptable, err)
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return
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}
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//reconstruct http request body for following new request to volume server
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r.Body = ioutil.NopCloser(bytes.NewBuffer(buf))
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}
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return
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}
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func (fs *FilerServer) monolithicUploadAnalyzer(w http.ResponseWriter, r *http.Request, replication, collection string) (fileId, urlLocation string, err error) {
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/*
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Amazon S3 ref link:[http://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html]
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There is a long way to provide a completely compatibility against all Amazon S3 API, I just made
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a simple data stream adapter between S3 PUT API and seaweedfs's volume storage Write API
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1. The request url format should be http://$host:$port/$bucketName/$objectName
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2. bucketName will be mapped to seaweedfs's collection name
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3. You could customize and make your enhancement.
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*/
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lastPos := strings.LastIndex(r.URL.Path, "/")
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if lastPos == -1 || lastPos == 0 || lastPos == len(r.URL.Path)-1 {
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glog.V(0).Infoln("URL Path [%s] is invalid, could not retrieve file name", r.URL.Path)
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err = fmt.Errorf("URL Path is invalid")
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writeJsonError(w, r, http.StatusInternalServerError, err)
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return
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}
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if err = checkContentMD5(w, r); err != nil {
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return
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}
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fileName := r.URL.Path[lastPos+1:]
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if err = multipartHttpBodyBuilder(w, r, fileName); err != nil {
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return
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}
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secondPos := strings.Index(r.URL.Path[1:], "/") + 1
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collection = r.URL.Path[1:secondPos]
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path := r.URL.Path
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if fileId, urlLocation, err = fs.queryFileInfoByPath(w, r, path); err == nil && fileId == "" {
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fileId, urlLocation, err = fs.assignNewFileInfo(w, r, replication, collection)
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}
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return
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}
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func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
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query := r.URL.Query()
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replication := query.Get("replication")
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@ -42,50 +221,19 @@ func (fs *FilerServer) PostHandler(w http.ResponseWriter, r *http.Request) {
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collection = fs.collection
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}
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var fileId string
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var fileId, urlLocation string
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var err error
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var urlLocation string
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if r.Method == "PUT" {
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buf, _ := ioutil.ReadAll(r.Body)
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r.Body = analogueReader{bytes.NewBuffer(buf)}
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fileName, _, _, _, _, _, _, pe := storage.ParseUpload(r)
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if pe != nil {
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glog.V(0).Infoln("failing to parse post body", pe.Error())
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writeJsonError(w, r, http.StatusInternalServerError, pe)
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return
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}
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//reconstruct http request body for following new request to volume server
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r.Body = analogueReader{bytes.NewBuffer(buf)}
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path := r.URL.Path
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if strings.HasSuffix(path, "/") {
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if fileName != "" {
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path += fileName
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}
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}
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if fileId, err = fs.filer.FindFile(path); err != nil && err != leveldb.ErrNotFound {
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glog.V(0).Infoln("failing to find path in filer store", path, err.Error())
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writeJsonError(w, r, http.StatusInternalServerError, err)
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if strings.HasPrefix(r.Header.Get("Content-Type"), "multipart/form-data; boundary=") {
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fileId, urlLocation, err = fs.multipartUploadAnalyzer(w, r, replication, collection)
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if err != nil {
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return
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} else if fileId != "" && err == nil {
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var le error
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urlLocation, le = operation.LookupFileId(fs.getMasterNode(), fileId)
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if le != nil {
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glog.V(1).Infoln("operation LookupFileId %s failed, err is %s", fileId, le.Error())
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w.WriteHeader(http.StatusNotFound)
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return
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}
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}
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} else {
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assignResult, ae := operation.Assign(fs.getMasterNode(), 1, replication, collection, query.Get("ttl"))
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if ae != nil {
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glog.V(0).Infoln("failing to assign a file id", ae.Error())
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writeJsonError(w, r, http.StatusInternalServerError, ae)
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fileId, urlLocation, err = fs.monolithicUploadAnalyzer(w, r, replication, collection)
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if err != nil {
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return
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}
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fileId = assignResult.Fid
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urlLocation = "http://" + assignResult.Url + "/" + assignResult.Fid
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}
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u, _ := url.Parse(urlLocation)
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