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sendbirdclient.go
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/
sendbirdclient.go
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package sendbird
import (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
)
const (
defaultBaseURL = "https://api.sendbird.com"
contentType = "application/json, charset=utf8"
)
// -----------------------
// Response is a Sendbird response. This wraps the standard http.Response returned from Sendbird.
type Response struct {
*http.Response
}
// An ErrorResponse reports the error caused by an API request
type ErrorResponse struct {
// HTTP response that caused this error
Response *http.Response
// Error message
Message string
}
func (r *ErrorResponse) Error() string {
return fmt.Sprintf("%v %v: %d %v",
r.Response.Request.Method, r.Response.Request.URL, r.Response.StatusCode, r.Message)
}
// RequestCompletionCallback defines the type of the request callback function
type RequestCompletionCallback func(*http.Request, *http.Response)
// Client manages communication with Sendbird
type SendbirdClient struct {
// HTTP client used to communicate with the DO API.
client *http.Client
// Base URL for API requests.
BaseURL *url.URL
AppId string
ApiToken string
ContentType string
// Services used for communicating with the API
Users UserService
Chat ChatChannelService
Messaging MessagingChannelService
Admin AdminService
Bot BotService
// Optional function called after every successful request made to the DO APIs
onRequestCompleted RequestCompletionCallback
}
// NewClient returns a new Sendbird API client.
func NewClient(appId string, apiToken string, httpClient *http.Client) *SendbirdClient {
if httpClient == nil {
httpClient = http.DefaultClient
}
baseURL, _ := url.Parse(defaultBaseURL)
c := &SendbirdClient{
client: httpClient,
BaseURL: baseURL,
AppId: appId,
ApiToken: apiToken,
ContentType: contentType,
}
c.Users = &UserServiceOp{client: c}
c.Chat = &ChatChannelServiceOp{client: c}
c.Messaging = &MessagingChannelServiceOp{client: c}
c.Admin = &AdminServiceOp{client: c}
c.Bot = &BotServiceOp{client: c}
return c
}
func (c *SendbirdClient) NormalizeId(Id string) string {
lastSlash := strings.LastIndex(Id, "/")
if lastSlash >= 0 {
return Id[lastSlash+1:]
} else {
return Id
}
}
// NewRequest creates an API request. A relative URL can be provided in urlStr, which will be resolved to the
// BaseURL of the Client. Relative URLS should always be specified without a preceding slash. If specified, the
// value pointed to by body is JSON encoded and included in as the request body.
func (c *SendbirdClient) NewRequest(method, urlStr string, body interface{}) (*http.Request, error) {
rel, err := url.Parse(urlStr)
if err != nil {
return nil, err
}
url := c.BaseURL.ResolveReference(rel)
buf := new(bytes.Buffer)
if body != nil {
err := json.NewEncoder(buf).Encode(body)
if err != nil {
return nil, err
}
}
req, err := http.NewRequest(method, url.String(), buf)
if err != nil {
return nil, err
}
req.Header.Add("Content-Type", c.ContentType)
return req, nil
}
// OnRequestCompleted sets the DO API request completion callback
func (c *SendbirdClient) OnRequestCompleted(rc RequestCompletionCallback) {
c.onRequestCompleted = rc
}
// newResponse creates a new Response for the provided http.Response
func newResponse(r *http.Response) *Response {
response := Response{Response: r}
// response.populateRate()
return &response
}
// CheckResponse checks the API response for errors, and returns them if present. A response is considered an
// error if it has a status code outside the 200 range. API error responses are expected to have either no response
// body, or a JSON response body that maps to ErrorResponse. Any other response body will be silently ignored.
func CheckResponse(r *http.Response) error {
if c := r.StatusCode; c >= 200 && c <= 299 {
return nil
}
if r.StatusCode == 404 {
return &ErrorResponse{Response: r, Message: "Resouce Not Found - please check the URL"}
}
errorResponse := &ErrorResponse{Response: r}
data, err := ioutil.ReadAll(r.Body)
if err == nil && len(data) > 0 {
err := json.Unmarshal(data, errorResponse)
if err != nil {
return err
}
}
return errorResponse
}
// Do sends an API request and returns the API response. The API response is JSON decoded and stored in the value
// pointed to by v, or returned as an error if an API error has occurred. If v implements the io.Writer interface,
// the raw response will be written to v, without attempting to decode it.
func (c *SendbirdClient) Do(req *http.Request, v interface{}) (*Response, error) {
resp, err := c.client.Do(req)
if err != nil {
return nil, err
}
if c.onRequestCompleted != nil {
c.onRequestCompleted(req, resp)
}
defer func() {
if rerr := resp.Body.Close(); err == nil {
err = rerr
}
}()
response := newResponse(resp)
err = CheckResponse(resp)
if err != nil {
return response, err
}
if v != nil {
if w, ok := v.(io.Writer); ok {
_, err := io.Copy(w, resp.Body)
if err != nil {
return nil, err
}
} else {
err := json.NewDecoder(resp.Body).Decode(v)
if err != nil {
return nil, err
}
}
}
return response, err
}