A wrapper for WordPress's wp_remote_request() that retries after common cURL errors with exponential backoff

retry-wp_remote_request.php

<?php

/**
 * Wrapper for wp_remote_request() with retry logic.
 *
 * @param string $url The URL to make the request to.
 * @param array $args Optional. An array of HTTP request arguments.
 * @param array $retry_curl_codes Optional. An array of cURL error codes to trigger a retry.
 * @param int $max_retries Optional. The maximum number of retries.
 * @return array|\WP_Error The response or WP_Error on failure.
 */
function retry_wp_remote_request( $url, $args = array(), $retry_curl_codes = array(6, 28), $max_retries = 3 ) {
	$retry_count = 0;
	$wait_time = 2; // Initial wait time in seconds.

	while ( $retry_count < $max_retries ) {
		$response = wp_remote_request( $url, $args );

		if ( ! is_wp_error( $response ) ) {
			return $response;
		}

		$error_message = $response->get_error_message();
		$should_retry = false;

		foreach ( $retry_curl_codes as $code ) {
			if ( false !== strpos( $error_message, "cURL error $code:" ) ) {
				$should_retry = true;
				break;
			}
		}

		if ( ! $should_retry ) {
			return new \WP_Error( 'http_request_failed', $error_message );
		}

		$retry_count++;
		sleep( $wait_time );
		$wait_time *= 2; // Exponential backoff
	}

	return new \WP_Error( 'http_request_failed', 'Max retries reached' );
}