Function handleHTTP

modules/frontend/mcp_tools.go:331–359

(ctx context.Context, handler http.Handler, req *http.Request)

}

func handleHTTP(ctx context.Context, handler http.Handler, req *http.Request) (string, error) {
	rw := newResponseBuffer()
	req = req.WithContext(ctx)

	if req.Body == nil {
		req.Body = io.NopCloser(bytes.NewReader([]byte{})) // prevents panic
	}

	if req.Header == nil {
		req.Header = make(http.Header)
	}

	// tell the query frontend we want content formatted for an LLM
	req.Header.Set(api.HeaderAccept, api.HeaderAcceptLLM)

	if req.RequestURI == "" {
		req.RequestURI = req.URL.RequestURI()
	}

	handler.ServeHTTP(rw, req)

	body := rw.body.String()

	if rw.status != http.StatusOK {
		return "", fmt.Errorf("tool failed with http status code %d and reason %s", rw.status, body)
	}

	return body, nil
}

// injectMuxVars uses the mux.SetVars method to add vars into the context that can be used by downstream handlers.
// a few Tempo endpoints rely on the mux routing package extracting vars from the request path. this method allows