Ta-Ching ChenandGitHub
bfbb80efcf
This PR adds an interface for controller API client, it allows us to implement mock API client for unit testing with ease and we are able to generate spec file without accessing the real Fission server.
127 lines
3.5 KiB
Go
127 lines
3.5 KiB
Go
/*
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Copyright 2019 The Fission Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package rest
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import (
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"bytes"
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"context"
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"io"
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"io/ioutil"
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"net/http"
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"strings"
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"github.com/pkg/errors"
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"golang.org/x/net/context/ctxhttp"
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)
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type (
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Interface interface {
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Create(relativeUrl string, contentType string, payload []byte) (*http.Response, error)
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Put(relativeUrl string, contentType string, payload []byte) (*http.Response, error)
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Get(relativeUrl string) (*http.Response, error)
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Delete(relativeUrl string) error
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Proxy(method string, relativeUrl string, payload []byte) (*http.Response, error)
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ServerInfo() (*http.Response, error)
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ServerURL() string
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}
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RESTClient struct {
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url string
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}
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)
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func NewRESTClient(serverUrl string) Interface {
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return &RESTClient{
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url: strings.TrimSuffix(serverUrl, "/"),
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}
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}
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func (c *RESTClient) Create(relativeUrl string, contentType string, payload []byte) (*http.Response, error) {
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var reader io.Reader
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if len(payload) > 0 {
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reader = bytes.NewReader(payload)
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}
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return c.sendRequest(http.MethodPost, c.v2CrdUrl(relativeUrl), map[string]string{"Content-type": contentType}, reader)
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}
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func (c *RESTClient) Put(relativeUrl string, contentType string, payload []byte) (*http.Response, error) {
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var reader io.Reader
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if len(payload) > 0 {
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reader = bytes.NewReader(payload)
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}
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return c.sendRequest(http.MethodPut, c.v2CrdUrl(relativeUrl), map[string]string{"Content-type": contentType}, reader)
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}
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func (c *RESTClient) Get(relativeUrl string) (*http.Response, error) {
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return c.sendRequest(http.MethodGet, c.v2CrdUrl(relativeUrl), nil, nil)
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}
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func (c *RESTClient) Delete(relativeUrl string) error {
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resp, err := c.sendRequest(http.MethodDelete, c.v2CrdUrl(relativeUrl), nil, nil)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != 200 {
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body, err := ioutil.ReadAll(resp.Body)
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if err != nil {
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return errors.Wrap(err, "error deleting")
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} else {
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return errors.Errorf("failed to delete: %v", string(body))
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}
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}
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return nil
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}
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func (c *RESTClient) Proxy(method string, relativeUrl string, payload []byte) (*http.Response, error) {
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var reader io.Reader
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if len(payload) > 0 {
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reader = bytes.NewReader(payload)
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}
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return c.sendRequest(method, c.proxyUrl(relativeUrl), nil, reader)
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}
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func (c *RESTClient) ServerInfo() (*http.Response, error) {
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return c.sendRequest(http.MethodGet, c.url, nil, nil)
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}
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func (c *RESTClient) ServerURL() string {
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return c.url
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}
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func (c *RESTClient) sendRequest(method string, relativeUrl string, headers map[string]string, reader io.Reader) (*http.Response, error) {
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req, err := http.NewRequest(method, relativeUrl, reader)
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if err != nil {
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return nil, err
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}
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for k, v := range headers {
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req.Header.Set(k, v)
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}
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// TODO: accept context
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return ctxhttp.Do(context.Background(), &http.Client{}, req)
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}
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func (c *RESTClient) v2CrdUrl(relativeUrl string) string {
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return c.url + "/v2/" + strings.TrimPrefix(relativeUrl, "/")
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}
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func (c *RESTClient) proxyUrl(relativeUrl string) string {
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return c.url + "/proxy/" + strings.TrimPrefix(relativeUrl, "/")
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}
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