func (r *registry) Push(job, instance, pushURL, method string) error {
if !strings.Contains(pushURL, "://") {
pushURL = "http://" + pushURL
}
if strings.HasSuffix(pushURL, "/") {
pushURL = pushURL[:len(pushURL)-1]
}
pushURL = fmt.Sprintf("%s/metrics/jobs/%s", pushURL, url.QueryEscape(job))
if instance != "" {
pushURL += "/instances/" + url.QueryEscape(instance)
}
buf := r.getBuf()
defer r.giveBuf(buf)
if err := r.writePB(expfmt.NewEncoder(buf, expfmt.FmtProtoDelim)); err != nil {
if r.panicOnCollectError {
panic(err)
}
return err
}
req, err := http.NewRequest(method, pushURL, buf)
if err != nil {
return err
}
req.Header.Set(contentTypeHeader, DelimitedTelemetryContentType)
resp, err := http.DefaultClient.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()
if resp.StatusCode != 202 {
return fmt.Errorf("unexpected status code %d while pushing to %s", resp.StatusCode, pushURL)
}
return nil
}
func (r *registry) ServeHTTP(w http.ResponseWriter, req *http.Request) {
contentType := expfmt.Negotiate(req.Header)
buf := r.getBuf()
defer r.giveBuf(buf)
writer, encoding := decorateWriter(req, buf)
if err := r.writePB(expfmt.NewEncoder(writer, contentType)); err != nil {
if r.panicOnCollectError {
panic(err)
}
http.Error(w, "An error has occurred:\n\n"+err.Error(), http.StatusInternalServerError)
return
}
if closer, ok := writer.(io.Closer); ok {
closer.Close()
}
header := w.Header()
header.Set(contentTypeHeader, string(contentType))
header.Set(contentLengthHeader, fmt.Sprint(buf.Len()))
if encoding != "" {
header.Set(contentEncodingHeader, encoding)
}
w.Write(buf.Bytes())
}