Introduce WPTServe for running W3C Blink Layout tests

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

+# Copyright (C) 2015 Google Inc. All rights reserved.

[jsbell, 2015/06/04 17:43:25]

Don't copy/paste the header, use the latest from:

https://www.chromium.org/developers/coding-style#TOC-File-headers

(It's also much shorter!)

[burnik, 2015/06/05 12:59:29]

Done.

+#

[Dirk Pranke, 2015/06/04 20:51:53]

Put this file in layout_tests/servers; you do not need the "third_party" part;
after all wptserve is no more third-party than pywebsocket or apache :), and
this is all blink code, not third-party code.

[burnik, 2015/06/05 12:59:29]

Done.

+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Start and stop the Apache HTTP server as it is 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"))
+        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)