// Watch attempts to begin watching the requested location.
// Returns a watch.Interface, or an error.
func (r *Request) Watch() (watch.Interface, error) {
if r.err != nil {
return nil, r.err
}
url := r.URL().String()
req, err := http.NewRequest(r.verb, url, r.body)
if err != nil {
return nil, err
}
client := r.client
if client == nil {
client = http.DefaultClient
}
resp, err := client.Do(req)
if err != nil {
// The watch stream mechanism handles many common partial data errors, so closed
// connections can be retried in many cases.
if util.IsProbableEOF(err) {
return watch.NewEmptyWatch(), nil
}
return nil, err
}
if resp.StatusCode != http.StatusOK {
if result := r.transformResponse(resp, req); result.err != nil {
return nil, result.err
}
return nil, fmt.Errorf("for request '%+v', got status: %v", url, resp.StatusCode)
}
return watch.NewStreamWatcher(watchjson.NewDecoder(resp.Body, r.codec)), nil
}
// Watch attempts to begin watching the requested location.
// Returns a watch.Interface, or an error.
func (r *Request) Watch() (watch.Interface, error) {
// We specifically don't want to rate limit watches, so we
// don't use r.throttle here.
if r.err != nil {
return nil, r.err
}
url := r.URL().String()
req, err := http.NewRequest(r.verb, url, r.body)
if err != nil {
return nil, err
}
client := r.client
if client == nil {
client = http.DefaultClient
}
r.backoffMgr.Sleep(r.backoffMgr.CalculateBackoff(r.URL()))
resp, err := client.Do(req)
updateURLMetrics(r, resp, err)
if r.baseURL != nil {
if err != nil {
r.backoffMgr.UpdateBackoff(r.baseURL, err, 0)
} else {
r.backoffMgr.UpdateBackoff(r.baseURL, err, resp.StatusCode)
}
}
if err != nil {
// The watch stream mechanism handles many common partial data errors, so closed
// connections can be retried in many cases.
if net.IsProbableEOF(err) {
return watch.NewEmptyWatch(), nil
}
return nil, err
}
if resp.StatusCode != http.StatusOK {
defer resp.Body.Close()
if result := r.transformResponse(resp, req); result.err != nil {
return nil, result.err
}
return nil, fmt.Errorf("for request '%+v', got status: %v", url, resp.StatusCode)
}
return watch.NewStreamWatcher(watchjson.NewDecoder(resp.Body, r.content.Codec)), nil
}