<?php

namespace Amp\Http\Client\Connection\Internal;

use Amp\Http\Client\HttpException;
use Amp\Http\Client\Request;

/**
 * @internal
 */
final class RequestNormalizer
{
	/**
	 * @throws HttpException
	 */
	public static function normalizeRequest(Request $request): Request
	{
		if (!$request->hasHeader('host')) {
		    // Though servers are supposed to be able to handle standard port names on the end of the
		    // Host header some fail to do this correctly. Thankfully PSR-7 recommends to strip the port
		    // if it is the standard port for the given scheme.
		    $request->setHeader('host', $request->getUri()->withUserInfo('')->getAuthority());
		}

		self::normalizeRequestBodyHeaders($request);

		// Always normalize this as last item, because we need to strip sensitive headers
		self::normalizeTraceRequest($request);

		return $request;
	}


	/**
	 * @throws HttpException
	 */
	private static function normalizeRequestBodyHeaders(Request $request): void
	{
		$body = $request->getBody();

		$contentType = $body->getContentType();
		if ($contentType !== null) {
		    $previousContentType = $request->getHeaderArray('content-type');
		    if ($previousContentType !== [] && $previousContentType !== [$contentType]) {
		        throw new HttpException('Conflicting content type headers in request and request body: ' . \implode(', ', $previousContentType) . ' / ' . $contentType);
		    }

		    $request->setHeader('content-type', $contentType);
		}

		if ($request->hasHeader("transfer-encoding")) {
		    $request->removeHeader("content-length");

		    return;
		}

		$contentLength = $body->getContentLength();
		if ($contentLength === 0 && \in_array($request->getMethod(), ["CONNECT", "GET", "HEAD", "OPTIONS", "CONNECT", "TRACE"], true)) {
		    $request->removeHeader('content-length');
		    $request->removeHeader('transfer-encoding');
		} elseif ($contentLength !== null) {
		    $request->setHeader('content-length', (string) $contentLength);
		    $request->removeHeader('transfer-encoding');
		} else {
		    $request->removeHeader('content-length');
		    $request->setHeader("transfer-encoding", "chunked");
		}
	}


	private static function normalizeTraceRequest(Request $request): void
	{
		if ($request->getMethod() !== 'TRACE') {
		    return;
		}

		// https://tools.ietf.org/html/rfc7231#section-4.3.8
		$request->setBody('');

		// Remove all body and sensitive headers
		$request->replaceHeaders([
		    "transfer-encoding" => [],
		    "content-length" => [],
		    "authorization" => [],
		    "proxy-authorization" => [],
		    "cookie" => [],
		]);
	}
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----Mjk3Njk2MTkwNTMxMjgyOCA2MDI5MjM1MTA4MDgxNjA1IDg0MTgwOTQyMDY4OTc3MTA=