package iamapi import ( "bytes" "encoding/xml" "fmt" "strconv" "net/http" "net/url" "time" "github.com/chrislusf/seaweedfs/weed/glog" "github.com/chrislusf/seaweedfs/weed/s3api/s3err" "github.com/aws/aws-sdk-go/service/iam" ) type mimeType string const ( mimeNone mimeType = "" mimeXML mimeType = "application/xml" ) func setCommonHeaders(w http.ResponseWriter) { w.Header().Set("x-amz-request-id", fmt.Sprintf("%d", time.Now().UnixNano())) w.Header().Set("Accept-Ranges", "bytes") } // Encodes the response headers into XML format. func encodeResponse(response interface{}) []byte { var bytesBuffer bytes.Buffer bytesBuffer.WriteString(xml.Header) e := xml.NewEncoder(&bytesBuffer) e.Encode(response) return bytesBuffer.Bytes() } // If none of the http routes match respond with MethodNotAllowed func notFoundHandler(w http.ResponseWriter, r *http.Request) { glog.V(0).Infof("unsupported %s %s", r.Method, r.RequestURI) writeErrorResponse(w, s3err.ErrMethodNotAllowed, r.URL) } func writeErrorResponse(w http.ResponseWriter, errorCode s3err.ErrorCode, reqURL *url.URL) { apiError := s3err.GetAPIError(errorCode) errorResponse := getRESTErrorResponse(apiError, reqURL.Path) encodedErrorResponse := encodeResponse(errorResponse) writeResponse(w, apiError.HTTPStatusCode, encodedErrorResponse, mimeXML) } func writeIamErrorResponse(w http.ResponseWriter, err error, object string, value string) { errCode := err.Error() errorResp := ErrorResponse{} errorResp.Error.Type = "Sender" errorResp.Error.Code = &errCode glog.Errorf("Response %+v", err) switch errCode { case iam.ErrCodeNoSuchEntityException: msg := fmt.Sprintf("The %s with name %s cannot be found.", object, value) errorResp.Error.Message = &msg writeResponse(w, http.StatusNotFound, encodeResponse(errorResp), mimeXML) default: writeResponse(w, http.StatusInternalServerError, encodeResponse(errorResp), mimeXML) } } func getRESTErrorResponse(err s3err.APIError, resource string) s3err.RESTErrorResponse { return s3err.RESTErrorResponse{ Code: err.Code, Message: err.Description, Resource: resource, RequestID: fmt.Sprintf("%d", time.Now().UnixNano()), } } func writeResponse(w http.ResponseWriter, statusCode int, response []byte, mType mimeType) { setCommonHeaders(w) if response != nil { w.Header().Set("Content-Length", strconv.Itoa(len(response))) } if mType != mimeNone { w.Header().Set("Content-Type", string(mType)) } w.WriteHeader(statusCode) if response != nil { glog.V(4).Infof("status %d %s: %s", statusCode, mType, string(response)) _, err := w.Write(response) if err != nil { glog.V(0).Infof("write err: %v", err) } w.(http.Flusher).Flush() } } func writeSuccessResponseXML(w http.ResponseWriter, response []byte) { writeResponse(w, http.StatusOK, response, mimeXML) }