WordPress filter hook for logging WP HTTP requests

wp_log_http_requests.php

<?php

function wp_log_http_requests( $response, $args, $url ) {

	// set your log file location here
	$logfile = plugin_dir_path( __FILE__ ) . '/http_requests.log';

	// parse request and response body to a hash for human readable log output
	$log_response = $response;
	if ( isset( $args['body'] ) ) {
		parse_str( $args['body'], $args['body_parsed'] );
	}
	if ( isset( $log_response['body'] ) ) {
		parse_str( $log_response['body'], $log_response['body_parsed'] );
	}
	// write into logfile
	file_put_contents( $logfile, sprintf( "### %s, URL: %s\nREQUEST: %sRESPONSE: %s\n", date( 'c' ), $url, print_r( $args, true ), print_r( $log_response, true ) ), FILE_APPEND );

	return $response;
}

// hook into WP_Http::_dispatch_request()
add_filter( 'http_response', 'wp_log_http_requests', 10, 3 );

?>

Great helper, thanks.

I've modified it a bit to use the default WordPress debug log file.

function fn_log_http_request_response($wp_http_response, $request, $url)
{
    $request = [
        'method' => $request['method'],
        'url' => $url,
        'headers' => $request['headers'],
        'body' => $request['body'],
    ];

    if($wp_http_response instanceof WP_Error) {
        $response = [
            'errors' => $wp_http_response->errors,
            'error_data' => $wp_http_response->error_data,
        ];
    } else {
        $response = [
            'status' => [
                'code' => wp_remote_retrieve_response_code($wp_http_response),
                'message' => wp_remote_retrieve_response_message($wp_http_response),
            ],
            'headers' => wp_remote_retrieve_headers($wp_http_response)->getAll(),
            'body' => wp_remote_retrieve_body($wp_http_response),
        ];
    }

    error_log(print_r([
        'request' => $request,
        'response' => $response,
    ], true));

    return $wp_http_response;
}

add_filter('http_response', 'fn_log_http_request_response', 10, 3);

Thanks for that great patch!

add_filter('http_response', 'fn_help_log_http_requests', 10, 3 );

You might change the callback function name to 'fn_log_http_request_response'.

Is there a way to check which file execute the HTTP request?