// Do sends an HTTP request with the provided http.Client and returns an HTTP response.
// If the client is nil, http.DefaultClient is used.
// If the context is canceled or times out, ctx.Err() will be returned.
func Do(ctx context.Context, client *http.Client, req *http.Request) (*http.Response, error) {
if client == nil {
client = http.DefaultClient
}
// Request cancelation changed in Go 1.5, see cancelreq.go and cancelreq_go14.go.
cancel := canceler(client, req)
type responseAndError struct {
resp *http.Response
err error
}
result := make(chan responseAndError, 1)
go func() {
resp, err := client.Do(req)
result <- responseAndError{resp, err}
}()
var resp *http.Response
select {
case <-ctx.Done():
cancel()
return nil, ctx.Err()
case r := <-result:
var err error
resp, err = r.resp, r.err
if err != nil {
return resp, err
}
}
c := make(chan struct{})
go func() {
select {
case <-ctx.Done():
cancel()
case <-c:
// The response's Body is closed.
}
}()
resp.Body = ¬ifyingReader{resp.Body, c}
return resp, nil
}
func (c *Client) get(ctx context.Context, config *apiConfig, apiReq apiRequest) (*http.Response, error) {
select {
case <-ctx.Done():
return nil, ctx.Err()
case <-c.rateLimiter:
// Execute request.
}
host := config.host
if c.baseURL != "" {
host = c.baseURL
}
req, err := http.NewRequest("GET", host+config.path, nil)
if err != nil {
return nil, err
}
q, err := c.generateAuthQuery(config.path, apiReq.params(), config.acceptsClientID)
if err != nil {
return nil, err
}
req.URL.RawQuery = q
return ctxhttp.Do(ctx, c.httpClient, req)
}