Introduce WPTServe for running W3C Blink Layout tests

Tools/Scripts/webkitpy/layout_tests/servers/wptserve_http.py

Index: Tools/Scripts/webkitpy/layout_tests/servers/wptserve_http.py
diff --git a/Tools/Scripts/webkitpy/layout_tests/servers/wptserve_http.py b/Tools/Scripts/webkitpy/layout_tests/servers/wptserve_http.py
new file mode 100644
index 0000000000000000000000000000000000000000..95bf1e5f139d0c6151d1e0c1ad33fbe816dcae61
--- /dev/null
+++ b/Tools/Scripts/webkitpy/layout_tests/servers/wptserve_http.py
@@ -0,0 +1,78 @@
+# 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.
+
+"""Start and stop the WPTserve servers as they're used by the layout tests."""
+
+import logging
+import os
+import socket
+
+from webkitpy.layout_tests.servers import server_base
+
+
+_log = logging.getLogger(__name__)
+
+
+class WPTServeHTTP(server_base.ServerBase):
+    def __init__(self, port_obj, output_dir):
+        super(WPTServeHTTP, self).__init__(port_obj, output_dir)
+        # TODO(burnik): This should be the only place where we set up the ports.
+        secure_port, insecure_port = (8001, 8444)
+        self._name = 'wptserve'
+        self._log_prefixes = ('access_log', 'error_log')
+        self._mappings = [{'port': secure_port},
+                          {'port': insecure_port, 'sslcert': True}]
+
+        # TODO(burnik): We can probably avoid PID files for WPT in the future.
+        self._pid_file = self._filesystem.join(self._runtime_path, '%s.pid' % self._name)
+
+        script_path = os.path.dirname(os.path.abspath(__file__))
+        self._path_to_wpt = os.path.abspath(os.path.join(script_path, "wpt_support", "wpt"))
+        self._executable = os.path.join(self._path_to_wpt, "serve")
+        self._path_to_wpt_config = os.path.join(self._path_to_wpt, "config.json")
+        self._path_to_wpt_tests = os.path.abspath(os.path.join(self._port_obj.layout_tests_dir(),
+                                                               "imported", "web-platform-tests"))
+        self._wpt_config = {"host": "web-platform.test",
+                            "doc_root": self._path_to_wpt_tests,
+                            "insecure_port": secure_port,
+                            "secure_port": insecure_port}
+        self._start_cmd = [self._executable, "--config", self._path_to_wpt_config]
+
+    def _spawn_process(self):
+        _log.debug('Starting %s server, cmd="%s"' % (self._name, str(self._start_cmd)))
+
+        # TODO(burnik): This config should probably be available in advance.
+        config = ('{'
+                  '"host": "%(host)s",'
+                  '"doc_root": "%(doc_root)s",'
+                  '"ports":{'
+                  '"http":[%(insecure_port)d, "auto"],'
+                  '"https":[%(secure_port)d],'
+                  '"ws":["auto"],'
+                  '"wss":["auto"]}'
+                  '}') % self._wpt_config
+        fs = self._port_obj.host.filesystem
+        fs.write_text_file(self._path_to_wpt_config, config)
+
+        self._process = self._executive.popen(self._start_cmd,
+                                              cwd=self._path_to_wpt,
+                                              shell=True,
+                                              stdout=self._executive.DEVNULL,
+                                              stderr=self._executive.DEVNULL,
+                                              preexec_fn=os.setsid)
+
+        # We probably won't need a PID file, but server_base needs it.
+        fs.write_text_file(self._pid_file, str(self._process.pid))
+        return self._process.pid
+
+    def stop(self):
+        self._stop_running_server()
+
+    def _stop_running_server(self):
+        # Clean up the pid file.
+        if self._pid and not self._executive.check_running_pid(self._pid):
+            self._filesystem.remove(self._pid_file)
+            return
+
+        self._executive.kill_process(self._pid)