Middleware to log Guzzle requests with Telescope

example.php

<?php

$stack = \GuzzleHttp\HandlerStack::create();
$stack->push(new \App\Http\Client\HttpClientEventsMiddleware());
$client = new \GuzzleHttp\Client(['handler' => $stack]);

$client->get('http://example.com');

HttpClientEventsMiddleware.php

<?php

namespace App\Http\Client;

use GuzzleHttp\Promise;
use Illuminate\Http\Client\Events\ConnectionFailed;
use Illuminate\Http\Client\Events\RequestSending;
use Illuminate\Http\Client\Events\ResponseReceived;
use Illuminate\Http\Client\Request;
use Illuminate\Http\Client\Response;

class HttpClientEventsMiddleware {

    public function __invoke(callable $handler)
    {
        return function ($request, array $options) use ($handler) {

            $laravelRequest = new Request($request);

            event(new RequestSending($laravelRequest));

            return $handler($request, $options)->then(
                $this->onSuccess($laravelRequest),
                $this->onFailure($laravelRequest)
            );
        };
    }

    protected function onSuccess(Request $request)
    {
        return function ($response) use ($request) {

            event(new ResponseReceived($request, new Response($response)));

            return $response;
        };
    }

    protected function onFailure(Request $request)
    {
        return function ($reason) use ($request) {

            event(new ConnectionFailed($request));

            return Promise\Create::rejectionFor($reason);
        };
    }


}

Exactly what I was looking for! Barry strikes again with a real gem 👍

We have to pass a Guzzle instance to an external library but we don't get tracking with the Laravel Sentry integration. This should fix that for us. Thanks.

Edit: There is a caveat to be aware of. If an event handler reads the body of the response then your actual code that was using the Guzzle client in the first place will get an empty response body. This is due to the body being a stream that can only be read once. I'm not sure of the best solution, but I ended up introducing this change:

protected function onSuccess(Request $request)
{
    return function ($response) use ($request) {

        event(new ResponseReceived($request, new Response($response)));

+       $response->getBody()->rewind(); // Rewind the body so that the caller can read it again

        return $response;
    };
}