Http Client duplucate effort when attaching "beforeSending" closure callback

[hubseven]

• Laravel Version: 8.38.0
• PHP Version: 8.0.2
• Database Driver & Version: mysql 5.7

Description:

When making HTTP requests using Http Client its possible to add a closure to the PendingRequest object using the beforeSending method. This adds a closure callback that is run after the http request has been made.

The closure is executed twice causing unintended side effects.

Steps To Reproduce:

Run the following code

Http::beforeSending(function($request, $options) {
    \Log::info('Preprocessing');
})->get('example.org');

Inspect the log to see 2 entries for "Preprocessing"

A workaround

Http::beforeSending(function($request, $options) {
    static $isProcessed = false;
    $isProcessed && \Log::info('Preprocessing');
    $isProcessed = true;
})->get('example.org');