convert integer http status codes in WriteHeader to http.Status* constants

int_to_constants.php

<?php
// w.WriteHeader(200) -> w.WriteHeader(http.StatusOK) // 200
array_map(function($a) {

	$data = file_get_contents($a);
	$data = preg_replace_callback("/\.WriteHeader\((\d+)\)/", function($d) {

		static $constants = array(
			100 => 'http.StatusContinue',
			101 => 'http.StatusSwitchingProtocols',
			200 => 'http.StatusOK',
			201 => 'http.StatusCreated',
			202 => 'http.StatusAccepted',
			203 => 'http.StatusNonAuthoritativeInfo',
			204 => 'http.StatusNoContent',
			205 => 'http.StatusResetContent',
			206 => 'http.StatusPartialContent',
			300 => 'http.StatusMultipleChoices',
			301 => 'http.StatusMovedPermanently',
			302 => 'http.StatusFound',
			303 => 'http.StatusSeeOther',
			304 => 'http.StatusNotModified',
			305 => 'http.StatusUseProxy',
			307 => 'http.StatusTemporaryRedirect',
			400 => 'http.StatusBadRequest',
			401 => 'http.StatusUnauthorized',
			402 => 'http.StatusPaymentRequired',
			403 => 'http.StatusForbidden',
			404 => 'http.StatusNotFound',
			405 => 'http.StatusMethodNotAllowed',
			406 => 'http.StatusNotAcceptable',
			407 => 'http.StatusProxyAuthRequired',
			408 => 'http.StatusRequestTimeout',
			409 => 'http.StatusConflict',
			410 => 'http.StatusGone',
			411 => 'http.StatusLengthRequired',
			412 => 'http.StatusPreconditionFailed',
			413 => 'http.StatusRequestEntityTooLarge',
			414 => 'http.StatusRequestURITooLong',
			415 => 'http.StatusUnsupportedMediaType',
			416 => 'http.StatusRequestedRangeNotSatisfiable',
			417 => 'http.StatusExpectationFailed',
			418 => 'http.StatusTeapot',
			500 => 'http.StatusInternalServerError',
			501 => 'http.StatusNotImplemented',
			502 => 'http.StatusBadGateway',
			503 => 'http.StatusServiceUnavailable',
			504 => 'http.StatusGatewayTimeout',
			505 => 'http.StatusHTTPVersionNotSupported',
		);

		return ".WriteHeader(".$constants[$d[1]].") // ".$d[1];

	}, $data);

	file_put_contents($a, $data);

}, glob("*.go"));