158 lines
4.6 KiB
PHP
158 lines
4.6 KiB
PHP
<?php
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/**
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* Slim Framework (http://slimframework.com)
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*
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* @link https://github.com/slimphp/Slim
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* @copyright Copyright (c) 2011-2015 Josh Lockhart
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* @license https://github.com/slimphp/Slim/blob/3.x/LICENSE.md (MIT License)
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*/
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namespace Slim\Handlers;
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use Psr\Http\Message\ServerRequestInterface;
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use Psr\Http\Message\ResponseInterface;
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use Slim\Http\Body;
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/**
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* Default Slim application not found handler.
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*
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* It outputs a simple message in either JSON, XML or HTML based on the
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* Accept header.
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*/
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class NotFound
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{
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/**
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* Known handled content types
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*
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* @var array
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*/
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protected $knownContentTypes = [
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'application/json',
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'application/xml',
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'text/xml',
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'text/html',
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];
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/**
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* Invoke not found handler
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*
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* @param ServerRequestInterface $request The most recent Request object
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* @param ResponseInterface $response The most recent Response object
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*
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* @return ResponseInterface
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*/
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public function __invoke(ServerRequestInterface $request, ResponseInterface $response)
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{
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$contentType = $this->determineContentType($request);
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switch ($contentType) {
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case 'application/json':
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$output = $this->renderJsonNotFoundOutput($request, $response);
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break;
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case 'text/xml':
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case 'application/xml':
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$output = $this->renderXmlNotFoundOutput($request, $response);
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break;
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case 'text/html':
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$output = $this->renderHtmlNotFoundOutput($request, $response);
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}
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$body = new Body(fopen('php://temp', 'r+'));
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$body->write($output);
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return $response->withStatus(404)
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->withHeader('Content-Type', $contentType)
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->withBody($body);
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}
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/**
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* Determine which content type we know about is wanted using Accept header
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*
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* @param ServerRequestInterface $request
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* @return string
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*/
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private function determineContentType(ServerRequestInterface $request)
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{
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$acceptHeader = $request->getHeaderLine('Accept');
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$selectedContentTypes = array_intersect(explode(',', $acceptHeader), $this->knownContentTypes);
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if (count($selectedContentTypes)) {
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return $selectedContentTypes[0];
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}
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return 'text/html';
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}
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/**
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* Return a response for application/json content not found
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*
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* @param ServerRequestInterface $request The most recent Request object
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* @param ResponseInterface $response The most recent Response object
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*
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* @return ResponseInterface
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*/
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protected function renderJsonNotFoundOutput(ServerRequestInterface $request, ResponseInterface $response)
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{
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return '{"message":"Not found"}';
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}
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/**
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* Return a response for xml content not found
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*
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* @param ServerRequestInterface $request The most recent Request object
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* @param ResponseInterface $response The most recent Response object
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*
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* @return ResponseInterface
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*/
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protected function renderXmlNotFoundOutput(ServerRequestInterface $request, ResponseInterface $response)
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{
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return '<root><message>Not found</message></root>';
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}
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/**
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* Return a response for text/html content not found
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*
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* @param ServerRequestInterface $request The most recent Request object
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* @param ResponseInterface $response The most recent Response object
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*
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* @return ResponseInterface
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*/
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protected function renderHtmlNotFoundOutput(ServerRequestInterface $request, ResponseInterface $response)
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{
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$homeUrl = (string)($request->getUri()->withPath('')->withQuery('')->withFragment(''));
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return <<<END
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<html>
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<head>
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<title>Page Not Found</title>
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<style>
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body{
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margin:0;
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padding:30px;
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font:12px/1.5 Helvetica,Arial,Verdana,sans-serif;
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}
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h1{
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margin:0;
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font-size:48px;
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font-weight:normal;
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line-height:48px;
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}
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strong{
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display:inline-block;
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width:65px;
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}
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</style>
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</head>
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<body>
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<h1>Page Not Found</h1>
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<p>
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The page you are looking for could not be found. Check the address bar
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to ensure your URL is spelled correctly. If all else fails, you can
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visit our home page at the link below.
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</p>
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<a href='$homeUrl'>Visit the Home Page</a>
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</body>
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</html>
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END;
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}
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}
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