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|
//Package rest provides a RocketChat rest client.
package rest
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"io/ioutil"
"log"
"net/http"
"net/url"
)
var (
ResponseErr = fmt.Errorf("got false response")
)
type Response interface {
OK() error
}
type Client struct {
Protocol string
Host string
Path string
Port string
Version string
// Use this switch to see all network communication.
Debug bool
auth *authInfo
}
type Status struct {
Success bool `json:"success"`
Error string `json:"error"`
Status string `json:"status"`
Message string `json:"message"`
}
type authInfo struct {
token string
id string
}
func (s Status) OK() error {
if s.Success {
return nil
}
if len(s.Error) > 0 {
return fmt.Errorf(s.Error)
}
if s.Status == "success" {
return nil
}
if len(s.Message) > 0 {
return fmt.Errorf("status: %s, message: %s", s.Status, s.Message)
}
return ResponseErr
}
// StatusResponse The base for the most of the json responses
type StatusResponse struct {
Status
Channel string `json:"channel"`
}
func NewClient(serverUrl *url.URL, debug bool) *Client {
protocol := "http"
port := "80"
if serverUrl.Scheme == "https" {
protocol = "https"
port = "443"
}
if len(serverUrl.Port()) > 0 {
port = serverUrl.Port()
}
return &Client{Host: serverUrl.Hostname(), Path: serverUrl.Path, Port: port, Protocol: protocol, Version: "v1", Debug: debug}
}
func (c *Client) getUrl() string {
if len(c.Version) == 0 {
c.Version = "v1"
}
return fmt.Sprintf("%v://%v:%v%s/api/%s", c.Protocol, c.Host, c.Port, c.Path, c.Version)
}
// Get call Get
func (c *Client) Get(api string, params url.Values, response Response) error {
return c.doRequest(http.MethodGet, api, params, nil, response)
}
// Post call as JSON
func (c *Client) Post(api string, body io.Reader, response Response) error {
return c.doRequest(http.MethodPost, api, nil, body, response)
}
// PostForm call as Form Data
func (c *Client) PostForm(api string, params url.Values, response Response) error {
return c.doRequest(http.MethodPost, api, params, nil, response)
}
func (c *Client) doRequest(method, api string, params url.Values, body io.Reader, response Response) error {
contentType := "application/x-www-form-urlencoded"
if method == http.MethodPost {
if body != nil {
contentType = "application/json"
} else if len(params) > 0 {
body = bytes.NewBufferString(params.Encode())
}
}
request, err := http.NewRequest(method, c.getUrl()+"/"+api, body)
if err != nil {
return err
}
if method == http.MethodGet {
if len(params) > 0 {
request.URL.RawQuery = params.Encode()
}
} else {
request.Header.Set("Content-Type", contentType)
}
if c.auth != nil {
request.Header.Set("X-Auth-Token", c.auth.token)
request.Header.Set("X-User-Id", c.auth.id)
}
if c.Debug {
log.Println(request)
}
resp, err := http.DefaultClient.Do(request)
if err != nil {
return err
}
defer resp.Body.Close()
bodyBytes, err := ioutil.ReadAll(resp.Body)
if c.Debug {
log.Println(string(bodyBytes))
}
var parse bool
if err == nil {
if e := json.Unmarshal(bodyBytes, response); e == nil {
parse = true
}
}
if resp.StatusCode != http.StatusOK {
if parse {
return response.OK()
}
return errors.New("Request error: " + resp.Status)
}
if err != nil {
return err
}
return response.OK()
}
|
