Content handler for python.

examples/python/__mojo__.py

Index: examples/python/__mojo__.py
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+# Copyright 2015 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.
+
+"""Example python application implementing the Echo service."""
+
+import logging
+
+import application_mojom
+import example_service_mojom
+import service_provider_mojom
+import shell_mojom
+
+import mojo_system
+
+class ApplicationImpl(application_mojom.Application):
+  def __init__(self):
+    self._providers = []
+
+  def Initialize(self, args):
+    pass
+
+  def AcceptConnection(self, requestor_url, services, exposed_services):
+    # We keep a reference to ServiceProviderImpl to ensure neither it nor
+    # provider gets garbage collected.
+    service_provider = ServiceProviderImpl(services)
+    service_provider.AddService(ExampleServiceImpl)
+    services.Bind(service_provider)
+    self._providers.append(services)
+
+
+class ServiceProviderImpl(service_provider_mojom.ServiceProvider):
+  def __init__(self, provider):
+    self._provider = provider
+    self._name_to_service_connector = {}
+
+  def AddService(self, service_class):
+    self._name_to_service_connector[service_class.manager.name] = service_class
+
+  def ConnectToService(self, interface_name, pipe):
+    if interface_name in self._name_to_service_connector:
+      service = self._name_to_service_connector[interface_name]
+      service.manager.Bind(service(), pipe)
+    else:
+      logging.error("Unable to find service " + interface_name)
+
+
+class ExampleServiceImpl(example_service_mojom.ExampleService):
+  def Ping(self, ping_value):
+    self.client.Pong(ping_value)
+
+  def RunCallback(self):
+    return {}
+
+def MojoMain(shell_handle):
+  """MojoMain is the entry point for a python Mojo module."""
+  loop = mojo_system.RunLoop()
+
+  shell = shell_mojom.Shell.manager.Proxy(mojo_system.Handle(shell_handle))
+  shell.client = ApplicationImpl()
+  shell.manager.AddOnErrorCallback(loop.Quit)
+
+  loop.Run()