package s3api import ( "crypto/md5" "encoding/json" "fmt" "io" "io/ioutil" "net/http" "strings" "github.com/gorilla/mux" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/server" ) var ( client *http.Client ) func init() { client = &http.Client{Transport: &http.Transport{ MaxIdleConnsPerHost: 1024, }} } func (s3a *S3ApiServer) PutObjectHandler(w http.ResponseWriter, r *http.Request) { // http://docs.aws.amazon.com/AmazonS3/latest/dev/UploadingObjects.html vars := mux.Vars(r) bucket := vars["bucket"] object := getObject(vars) _, err := validateContentMd5(r.Header) if err != nil { writeErrorResponse(w, ErrInvalidDigest, r.URL) return } rAuthType := getRequestAuthType(r) dataReader := r.Body if rAuthType == authTypeStreamingSigned { dataReader = newSignV4ChunkedReader(r) } uploadUrl := fmt.Sprintf("http://%s%s/%s%s?collection=%s", s3a.option.Filer, s3a.option.BucketsPath, bucket, object, bucket) etag, errCode := s3a.putToFiler(r, uploadUrl, dataReader) if errCode != ErrNone { writeErrorResponse(w, errCode, r.URL) return } setEtag(w, etag) writeSuccessResponseEmpty(w) } func (s3a *S3ApiServer) GetObjectHandler(w http.ResponseWriter, r *http.Request) { vars := mux.Vars(r) bucket := vars["bucket"] object := getObject(vars) if strings.HasSuffix(r.URL.Path, "/") { writeErrorResponse(w, ErrNotImplemented, r.URL) return } destUrl := fmt.Sprintf("http://%s%s/%s%s", s3a.option.Filer, s3a.option.BucketsPath, bucket, object) s3a.proxyToFiler(w, r, destUrl, passThroughResponse) } func (s3a *S3ApiServer) HeadObjectHandler(w http.ResponseWriter, r *http.Request) { vars := mux.Vars(r) bucket := vars["bucket"] object := getObject(vars) destUrl := fmt.Sprintf("http://%s%s/%s%s", s3a.option.Filer, s3a.option.BucketsPath, bucket, object) s3a.proxyToFiler(w, r, destUrl, passThroughResponse) } func (s3a *S3ApiServer) DeleteObjectHandler(w http.ResponseWriter, r *http.Request) { vars := mux.Vars(r) bucket := vars["bucket"] object := getObject(vars) destUrl := fmt.Sprintf("http://%s%s/%s%s", s3a.option.Filer, s3a.option.BucketsPath, bucket, object) s3a.proxyToFiler(w, r, destUrl, func(proxyResonse *http.Response, w http.ResponseWriter) { for k, v := range proxyResonse.Header { w.Header()[k] = v } w.WriteHeader(http.StatusNoContent) }) } // DeleteMultipleObjectsHandler - Delete multiple objects func (s3a *S3ApiServer) DeleteMultipleObjectsHandler(w http.ResponseWriter, r *http.Request) { // TODO writeErrorResponse(w, ErrNotImplemented, r.URL) } func (s3a *S3ApiServer) proxyToFiler(w http.ResponseWriter, r *http.Request, destUrl string, responseFn func(proxyResonse *http.Response, w http.ResponseWriter)) { glog.V(2).Infof("s3 proxying %s to %s", r.Method, destUrl) proxyReq, err := http.NewRequest(r.Method, destUrl, r.Body) if err != nil { glog.Errorf("NewRequest %s: %v", destUrl, err) writeErrorResponse(w, ErrInternalError, r.URL) return } proxyReq.Header.Set("Host", s3a.option.Filer) proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr) proxyReq.Header.Set("Etag-MD5", "True") for header, values := range r.Header { for _, value := range values { proxyReq.Header.Add(header, value) } } resp, postErr := client.Do(proxyReq) if postErr != nil { glog.Errorf("post to filer: %v", postErr) writeErrorResponse(w, ErrInternalError, r.URL) return } defer resp.Body.Close() responseFn(resp, w) } func passThroughResponse(proxyResonse *http.Response, w http.ResponseWriter) { for k, v := range proxyResonse.Header { w.Header()[k] = v } w.WriteHeader(proxyResonse.StatusCode) io.Copy(w, proxyResonse.Body) } func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader io.ReadCloser) (etag string, code ErrorCode) { hash := md5.New() var body io.Reader = io.TeeReader(dataReader, hash) proxyReq, err := http.NewRequest("PUT", uploadUrl, body) if err != nil { glog.Errorf("NewRequest %s: %v", uploadUrl, err) return "", ErrInternalError } proxyReq.Header.Set("Host", s3a.option.Filer) proxyReq.Header.Set("X-Forwarded-For", r.RemoteAddr) for header, values := range r.Header { for _, value := range values { proxyReq.Header.Add(header, value) } } resp, postErr := client.Do(proxyReq) dataReader.Close() if postErr != nil { glog.Errorf("post to filer: %v", postErr) return "", ErrInternalError } defer resp.Body.Close() etag = fmt.Sprintf("%x", hash.Sum(nil)) resp_body, ra_err := ioutil.ReadAll(resp.Body) if ra_err != nil { glog.Errorf("upload to filer response read: %v", ra_err) return etag, ErrInternalError } var ret weed_server.FilerPostResult unmarshal_err := json.Unmarshal(resp_body, &ret) if unmarshal_err != nil { glog.Errorf("failing to read upload to %s : %v", uploadUrl, string(resp_body)) return "", ErrInternalError } if ret.Error != "" { glog.Errorf("upload to filer error: %v", ret.Error) return "", ErrInternalError } return etag, ErrNone } func setEtag(w http.ResponseWriter, etag string) { if etag != "" { if strings.HasPrefix(etag, "\"") { w.Header().Set("ETag", etag) } else { w.Header().Set("ETag", "\""+etag+"\"") } } } func getObject(vars map[string]string) string { object := vars["object"] if !strings.HasPrefix(object, "/") { object = "/" + object } return object }