func logError(ctx context.Context, err error, event string) {
var lines []string
lines = append(lines, fmt.Sprintf("event=%s %s", event, err))
for skip := 1; ; skip++ {
pc, file, linenum, ok := runtime.Caller(skip)
if !ok {
break
}
if file[len(file)-1] == 'c' || file == thisFile {
continue
}
f := runtime.FuncForPC(pc)
line := fmt.Sprintf("%s:%d %s()", file, linenum, f.Name())
lines = append(lines, line)
}
if len(lines) > 1 {
logMutex.Lock()
defer logMutex.Unlock()
}
for _, line := range lines {
reqlog.Print(ctx, line)
}
}
// Data returns a JSON response with the provided data and HTTP status
// code.
func Data(ctx context.Context, w http.ResponseWriter, status int, data interface{}) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(status)
if err := json.NewEncoder(w).Encode(data); isBrokenPipe(err) {
reqlog.Print(ctx, "unable to respond to client. event=respond_broken_pipe")
metrics.Increment("respond_broken_pipe")
} else if err != nil {
panic(err)
}
}