[chromedriver]Implement command: title.

chrome/test/chromedriver/webserver.py

Index: chrome/test/chromedriver/webserver.py
diff --git a/chrome/test/chromedriver/webserver.py b/chrome/test/chromedriver/webserver.py
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+++ b/chrome/test/chromedriver/webserver.py
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+# Copyright (c) 2012 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import BaseHTTPServer
+import os
+import threading
+
+
+class _FileRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
+  """Sends back file resources relative to the server's |root_dir|."""
+
+  def do_GET(self):
+    if self.path.endswith('favicon.ico'):
+      self.send_error(404)
+      return
+    path = os.path.join(self.server.root_dir, *self.path.split('/'))
+    with open(path, 'r') as f:
+      data = f.read()
+    self.send_response(200)
+    self.send_header('Content-Length', len(data))
+    self.end_headers()
+    self.wfile.write(data)
+
+
+class WebServer(object):
+  """An HTTP or HTTPS server that serves files on its own thread."""
+
+  def __init__(self, root_dir, server_cert_and_key_path=None):
+    """Starts the web server on its own thread on an ephemeral port.
+    It is an HTTP server if parameter server_cert_and_key_path is not provided.
+    Otherwise, it is an HTTPS server.
+
+    After this function returns, it is safe to assume the server is ready
+    to receive requests.
+
+    Args:
+      root_dir: root path to serve files from. This parameter is required.
+      server_cert_and_key_path: path to a PEM file containing the cert and key.
+                                if it is None, start the server as an HTTP one.
+    """
+    self._server = BaseHTTPServer.HTTPServer(
+        ('127.0.0.1', 0), _FileRequestHandler)
+    self._server.root_dir = root_dir
+    if server_cert_and_key_path is not None:
+      self._is_https_enabled = True
+      self._server.socket = ssl.wrap_socket(
+          self._server.socket, certfile=server_cert_and_key_path,
+          server_side=True)
+    else:
+      self._is_https_enabled = False
+
+    self._thread = threading.Thread(target=self._server.serve_forever)
+    self._thread.start()
+
+  def GetUrl(self):
+    """Returns the base URL of the server."""
+    if self._is_https_enabled:
+      return 'https://127.0.0.1:%s' % self._server.server_port
+    return 'http://127.0.0.1:%s' % self._server.server_port
+
+  def Shutdown(self):
+    """Shuts down the server synchronously."""
+    self._server.shutdown()
+    self._thread.join()