Version 1

[yaffs-website] / web / core / lib / Drupal / Core / StackMiddleware / NegotiationMiddleware.php

diff --git a/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php b/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php
new file mode 100644 (file)
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+++ b/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php
@@ -0,0 +1,95 @@
+<?php
+
+namespace Drupal\Core\StackMiddleware;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\HttpKernelInterface;
+
+/**
+ * Provides a middleware to determine the content type upon the accept header.
+ *
+ * @todo This is a temporary solution, remove this in https://www.drupal.org/node/2364011
+ */
+class NegotiationMiddleware implements HttpKernelInterface {
+
+  /**
+   * The wrapped HTTP kernel.
+   *
+   * @var \Symfony\Component\HttpKernel\HttpKernelInterface
+   */
+  protected $app;
+
+  /**
+   * Contains a hashmap of format as key and mimetype as value.
+   *
+   * @var array
+   */
+  protected $formats = [];
+
+  /**
+   * Constructs a new NegotiationMiddleware.
+   *
+   * @param \Symfony\Component\HttpKernel\HttpKernelInterface $app
+   *   The wrapper HTTP kernel
+   */
+  public function __construct(HttpKernelInterface $app) {
+    $this->app = $app;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = TRUE) {
+    // Register available mime types.
+    foreach ($this->formats as $format => $mime_type) {
+      $request->setFormat($format, $mime_type);
+    }
+
+    // Determine the request format using the negotiator.
+    $request->setRequestFormat($this->getContentType($request));
+    return $this->app->handle($request, $type, $catch);
+  }
+
+  /**
+   * Registers a format for a given MIME type.
+   *
+   * @param string $format
+   *   The format.
+   * @param string $mime_type
+   *   The MIME type.
+   *
+   * @return $this
+   */
+  public function registerFormat($format, $mime_type) {
+    $this->formats[$format] = $mime_type;
+    return $this;
+  }
+
+  /**
+   * Gets the normalized type of a request.
+   *
+   * The normalized type is a short, lowercase version of the format, such as
+   * 'html', 'json' or 'atom'.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $request
+   *   The request object from which to extract the content type.
+   *
+   * @return string
+   *   The normalized type of a given request.
+   */
+  protected function getContentType(Request $request) {
+    // AJAX iframe uploads need special handling, because they contain a JSON
+    // response wrapped in <textarea>.
+    if ($request->request->get('ajax_iframe_upload', FALSE)) {
+      return 'iframeupload';
+    }
+
+    if ($request->query->has('_format')) {
+      return $request->query->get('_format');
+    }
+
+    // Do HTML last so that it always wins.
+    return 'html';
+  }
+
+}