WithURL.php
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WithURL.php
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	<?php

	namespace Keruald\OmniTools\HTTP\Requests;

	use Keruald\OmniTools\Strings\Multibyte\StringUtilities;

	trait WithURL {

	///
	/// Main methods
	///

	public static function getServerURL () : string {
	$scheme = self::getScheme();
	$name = self::getServerName();
	$port = self::getPort();

	// If we forward for a proxy, trust the scheme instead of standard :80
	$fixToHTTPS = $port === 80 && $scheme === "https";

	if ($port === 443 \|\| $fixToHTTPS) {
	return "https://$name";
	}

	if ($port === 80) {
	return "http://$name";
	}

	return "$scheme://$name:$port";
	}

	///
	/// Helper methods
	///

	public static function getPort () : int {
	return (int)($_SERVER['SERVER_PORT'] ?? 80);
	}

	public static function getServerName () : string {
	return $_SERVER['SERVER_NAME'] ?? "localhost";
	}

	public static function getScheme () : string {
	return $_SERVER['REQUEST_SCHEME']
	?? $_SERVER['HTTP_X_FORWARDED_PROTO']
	?? $_SERVER['HTTP_X_FORWARDED_PROTOCOL']
	?? $_SERVER['HTTP_X_URL_SCHEME']
	?? self::guessScheme();
	}

	private static function guessScheme () : string {
	return self::isHTTPS() ? "https" : "http";
	}

	public static function isHTTPS () : bool {
	// Legacy headers have been documented at MDN:
	// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Forwarded-Proto

	$headers = self::getHTTPSHeadersTable();
	foreach ($headers as $header => $value) {
	if (isset($_SERVER[$header]) && $_SERVER[$header] === $value) {
	return true;
	}
	}

	if (isset($_SERVER['HTTP_FORWARDED'])) {
	return StringUtilities::contains($_SERVER['HTTP_FORWARDED'], "proto=https");
	}

	return false;
	}

	private static function getHTTPSHeadersTable () : array {
	return [
	"HTTPS" => "on",
	"REQUEST_SCHEME" => "https",
	"SERVER_PORT" => "443",
	"HTTP_X_FORWARDED_PROTO" => "https",
	"HTTP_FRONT_END_HTTPS" => "on",
	"HTTP_X_FORWARDED_PROTOCOL" => "https",
	"HTTP_X_FORWARDED_SSL" => "on",
	"HTTP_X_URL_SCHEME" => "https",
	];
	}

	}

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