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client.go
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client.go
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// Copyright (c) 2014 Salsita Software
// Use of this source code is governed by the MIT License.
// The license can be found in the LICENSE file.
package pivotal
import (
"bytes"
"encoding/json"
"errors"
"net/http"
"net/url"
)
const (
LibraryVersion = "0.0.1"
defaultBaseURL = "https://www.pivotaltracker.com/services/v5/"
defaultUserAgent = "go-pivotaltracker/" + LibraryVersion
)
var ErrNoTrailingSlash = errors.New("trailing slash missing")
type Client struct {
// Pivotal Tracker access token to be used to authenticate API requests.
token string
// HTTP client to be used for communication with the Pivotal Tracker API.
client *http.Client
// Base URL of the Pivotal Tracker API that is to be used to form API requests.
baseURL *url.URL
// User-Agent header to use when connecting to the Pivotal Tracker API.
userAgent string
// Me service
Me *MeService
// Project service
Projects *ProjectService
// Story service
Stories *StoryService
}
func NewClient(apiToken string) *Client {
baseURL, _ := url.Parse(defaultBaseURL)
client := &Client{
token: apiToken,
client: http.DefaultClient,
baseURL: baseURL,
userAgent: defaultUserAgent,
}
client.Me = newMeService(client)
client.Projects = newProjectService(client)
client.Stories = newStoryService(client)
return client
}
func (c *Client) SetBaseURL(baseURL string) error {
u, err := url.Parse(baseURL)
if err != nil {
return err
}
if u.Path != "" && u.Path[len(u.Path)-1] != '/' {
return ErrNoTrailingSlash
}
c.baseURL = u
return nil
}
func (c *Client) SetUserAgent(agent string) {
c.userAgent = agent
}
func (c *Client) NewRequest(method, urlPath string, body interface{}) (*http.Request, error) {
path, err := url.Parse(urlPath)
if err != nil {
return nil, err
}
u := c.baseURL.ResolveReference(path)
buf := new(bytes.Buffer)
if body != nil {
if err := json.NewEncoder(buf).Encode(body); err != nil {
return nil, err
}
}
req, err := http.NewRequest(method, u.String(), buf)
if err != nil {
return nil, err
}
req.Header.Set("Content-Type", "application/json")
req.Header.Set("User-Agent", c.userAgent)
req.Header.Set("X-TrackerToken", c.token)
return req, nil
}
func (c *Client) Do(req *http.Request, v interface{}) (*http.Response, error) {
resp, err := c.client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode > 299 {
var errObject Error
if err := json.NewDecoder(resp.Body).Decode(&errObject); err != nil {
return resp, &ErrAPI{Response: resp}
}
return resp, &ErrAPI{
Response: resp,
Err: &errObject,
}
}
if v != nil {
err = json.NewDecoder(resp.Body).Decode(v)
}
return resp, err
}