Curl problem and a proposed solution

I have been having problems with curl requests from my server. The page would just hang on “validating” because admin-ajax.php would not give a response.

The issue was with curl configuration. It turned out that curl needed to be told how to resolve the ip by adding a line “curl_setopt( $curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);” to your alg-wc-eu-vat-functions-validation.php in function alg_wc_eu_vat_validate_vat_no_soap.

...
	function alg_wc_eu_vat_validate_vat_no_soap( $country_code, $vat_number, $billing_company, $method ) {
		$country_code = strtoupper( $country_code );
		$api_url = "https://ec.europa.eu/taxation_customs/vies/viesquer.do?ms=" . $country_code . "&vat=" . $vat_number;
		$api_url = "https://ec.europa.eu/taxation_customs/vies/rest-api/ms/" .  $country_code . "/vat/" . $vat_number;
		switch ( $method ) {
			case 'file_get_contents':
				if ( ini_get( 'allow_url_fopen' ) ) {
					$response = file_get_contents( $api_url );
				} else {
					alg_wc_eu_vat_maybe_log( $country_code, $vat_number, $billing_company, $method,
						sprintf( __( 'Error: %s is disabled', 'eu-vat-for-woocommerce' ), 'allow_url_fopen' ) );
					return null;
				}
				break;
			default: // 'curl'
				if ( function_exists( 'curl_version' ) ) {
					$curl = curl_init( $api_url );
					curl_setopt( $curl, CURLOPT_RETURNTRANSFER, 1 );
					curl_setopt( $curl, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4); //proposed change
...

Would you consider this change in a future version of the plugin so that I don’t need to change it with every update?

Thanks for the great work you are doing!

• This topic was modified 1 year ago by raimondsar.