Пример #1
0
// transformResponse converts an API response into a structured API object
func (r *Request) transformResponse(resp *http.Response, req *http.Request) Result {
	var body []byte
	if resp.Body != nil {
		if data, err := ioutil.ReadAll(resp.Body); err == nil {
			body = data
		}
	}

	glogBody("Response Body", body)

	// verify the content type is accurate
	contentType := resp.Header.Get("Content-Type")
	decoder := r.serializers.Decoder
	if len(contentType) > 0 && (decoder == nil || (len(r.content.ContentType) > 0 && contentType != r.content.ContentType)) {
		mediaType, params, err := mime.ParseMediaType(contentType)
		if err != nil {
			return Result{err: errors.NewInternalError(err)}
		}
		decoder, err = r.serializers.RenegotiatedDecoder(mediaType, params)
		if err != nil {
			// if we fail to negotiate a decoder, treat this as an unstructured error
			switch {
			case resp.StatusCode == http.StatusSwitchingProtocols:
				// no-op, we've been upgraded
			case resp.StatusCode < http.StatusOK || resp.StatusCode > http.StatusPartialContent:
				return Result{err: r.transformUnstructuredResponseError(resp, req, body)}
			}
			return Result{
				body:        body,
				contentType: contentType,
				statusCode:  resp.StatusCode,
			}
		}
	}

	switch {
	case resp.StatusCode == http.StatusSwitchingProtocols:
		// no-op, we've been upgraded
	case resp.StatusCode < http.StatusOK || resp.StatusCode > http.StatusPartialContent:
		// calculate an unstructured error from the response which the Result object may use if the caller
		// did not return a structured error.
		retryAfter, _ := retryAfterSeconds(resp)
		err := r.newUnstructuredResponseError(body, isTextResponse(resp), resp.StatusCode, req.Method, retryAfter)
		return Result{
			body:        body,
			contentType: contentType,
			statusCode:  resp.StatusCode,
			decoder:     decoder,
			err:         err,
		}
	}

	return Result{
		body:        body,
		contentType: contentType,
		statusCode:  resp.StatusCode,
		decoder:     decoder,
	}
}
Пример #2
0
// transformResponse converts an API response into a structured API object
func (r *Request) transformResponse(resp *http.Response, req *http.Request) Result {
	var body []byte
	if resp.Body != nil {
		if data, err := ioutil.ReadAll(resp.Body); err == nil {
			body = data
		}
	}

	if glog.V(8) {
		if bytes.IndexFunc(body, func(r rune) bool {
			return r < 0x0a
		}) != -1 {
			glog.Infof("Response Body:\n%s", hex.Dump(body))
		} else {
			glog.Infof("Response Body: %s", string(body))
		}
	}

	// verify the content type is accurate
	contentType := resp.Header.Get("Content-Type")
	decoder := r.serializers.Decoder
	if len(contentType) > 0 && (decoder == nil || (len(r.content.ContentType) > 0 && contentType != r.content.ContentType)) {
		mediaType, params, err := mime.ParseMediaType(contentType)
		if err != nil {
			return Result{err: errors.NewInternalError(err)}
		}
		decoder, err = r.serializers.RenegotiatedDecoder(mediaType, params)
		if err != nil {
			// if we fail to negotiate a decoder, treat this as an unstructured error
			switch {
			case resp.StatusCode == http.StatusSwitchingProtocols:
				// no-op, we've been upgraded
			case resp.StatusCode < http.StatusOK || resp.StatusCode > http.StatusPartialContent:
				return Result{err: r.transformUnstructuredResponseError(resp, req, body)}
			}
			return Result{
				body:        body,
				contentType: contentType,
				statusCode:  resp.StatusCode,
			}
		}
	}

	// Did the server give us a status response?
	isStatusResponse := false
	status := &unversioned.Status{}
	// Because release-1.1 server returns Status with empty APIVersion at paths
	// to the Extensions resources, we need to use DecodeInto here to provide
	// default groupVersion, otherwise a status response won't be correctly
	// decoded.
	err := runtime.DecodeInto(decoder, body, status)
	if err == nil && len(status.Status) > 0 {
		isStatusResponse = true
	}

	switch {
	case resp.StatusCode == http.StatusSwitchingProtocols:
		// no-op, we've been upgraded
	case resp.StatusCode < http.StatusOK || resp.StatusCode > http.StatusPartialContent:
		if !isStatusResponse {
			return Result{err: r.transformUnstructuredResponseError(resp, req, body)}
		}
		return Result{err: errors.FromObject(status)}
	}

	// If the server gave us a status back, look at what it was.
	success := resp.StatusCode >= http.StatusOK && resp.StatusCode <= http.StatusPartialContent
	if isStatusResponse && (status.Status != unversioned.StatusSuccess && !success) {
		// "Failed" requests are clearly just an error and it makes sense to return them as such.
		return Result{err: errors.FromObject(status)}
	}

	return Result{
		body:        body,
		contentType: contentType,
		statusCode:  resp.StatusCode,
		decoder:     decoder,
	}
}