Added Response object.

2011-12-20 15:07:36 -06:00
parent 9be63922b8
commit 29e1ed27b6
1 changed files with 127 additions and 0 deletions
--- a/src/HPCloud/Transport/Response.php
+++ b/src/HPCloud/Transport/Response.php
@@ -0,0 +1,127 @@
+<?php
+/**
+ * @file
+ *
+ * A response from a transport.
+ */
+namespace HPCloud\Transport;
+
+/**
+ * A Transport response.
+ *
+ * When one of the transporters makes a request, it will
+ * return one of these as a response. The response is simplified
+ * to the needs of the HP Cloud services and isn't a
+ * general purpose HTTP response object.
+ *
+ * The transport wraps three pieces of information:
+ *   - The response body.
+ *   - The HTTP headers.
+ *   - Other metadata about the request.
+ *
+ * There are two different "modes" for working with a response
+ * object. Either you can work with the raw file data directly
+ * or you can work with the string content of the file.
+ *
+ * You should work with the raw file directly (using getFile())
+ * if you are working with large objects, such as those returned
+ * from Object Storage.
+ *
+ * You may prefer to work with string data when you are working
+ * with the JSON data returned by the vast majority of requests.
+ */
+class Response {
+
+  protected $handle;
+  protected $metadata;
+  protected $headers;
+
+  /**
+   * Construct a new Response.
+   *
+   * The Transporter implementations use this to
+   * construct a response.
+   */
+  public function __construct($handle, $metadata) {
+    $this->handle = $handle;
+    $this->metadata = $metadata;
+    $this->headers = &$metadata['wrapper_data'];
+  }
+
+  /**
+   * Destroy the object.
+   */
+  public function __destruct() {
+    fclose($this->handle);
+  }
+
+  /**
+   * Get the file handle.
+   * This provides raw access to the IO stream. Users
+   * are responsible for all IO management.
+   *
+   * Note that if the handle is closed through this object,
+   * the handle returned by getFile() will also be closed
+   * (they are one and the same).
+   *
+   * @return resource
+   *   A file handle.
+   */
+  public function getFile() {
+    return $this->handle;
+  }
+
+  /**
+   * Get the contents of this response as a string.
+   *
+   * This returns the body of the response (no HTTP headers)
+   * as a single string.
+   *
+   * @return string
+   *   The contents of the response body.
+   */
+  public function getContents() {
+    $out = fread($this->handle, $this->metadata['unread_bytes']);
+
+    // Should we close or rewind?
+    // fclose($this->handle);
+
+    return $out;
+  }
+
+  /**
+   * Get metadata.
+   *
+   * This returns any available metadata on the file. Not
+   * all Transporters will have any associated metadata.
+   * Some return extra information on the processing of the
+   * data.
+   *
+   * @return array
+   *   An associative array of metadata about the
+   *   transaction resulting in this response.
+   */
+  public function getMetadata() {
+    return $this->metadata;
+  }
+
+  /**
+   * Get the HTTP headers.
+   *
+   * This returns an associative array of all of the
+   * headers returned by the remote server.
+   *
+   * These are available even if the stream has been closed.
+   */
+  public function getHeaders() {
+    return $this->headers;
+  }
+
+  public function __toString() {
+    $out = fread($this->handle, $this->metadata['unread_bytes']);
+    fclose($this->handle);
+
+    return $out;
+  }
+
+}