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Side by Side Diff: gm/rebaseline_server/server.py

Issue 24274003: Create HTTP-based GM results viewer. (Closed) Base URL: http://skia.googlecode.com/svn/trunk/
Patch Set: linewrap Created 7 years, 2 months ago
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1 #!/usr/bin/python
2
3 '''
4 Copyright 2013 Google Inc.
5
6 Use of this source code is governed by a BSD-style license that can be
7 found in the LICENSE file.
8 '''
9
10 '''
11 HTTP server for our HTML rebaseline viewer.
12 '''
13
14 # System-level imports
15 import argparse
16 import BaseHTTPServer
17 import json
18 import os
19 import posixpath
20 import re
21 import shutil
22 import sys
23
24 # Imports from within Skia
25 #
26 # We need to add the 'tools' directory, so that we can import svn.py within
27 # that directory.
28 # Make sure that the 'tools' dir is in the PYTHONPATH, but add it at the *end*
29 # so any dirs that are already in the PYTHONPATH will be preferred.
30 TRUNK_DIRECTORY = os.path.dirname(os.path.dirname(os.path.dirname(
31 os.path.realpath(__file__))))
32 TOOLS_DIRECTORY = os.path.join(TRUNK_DIRECTORY, 'tools')
33 if TOOLS_DIRECTORY not in sys.path:
34 sys.path.append(TOOLS_DIRECTORY)
35 import svn
36
37 # Imports from local dir
38 import results
39
40 ACTUALS_SVN_REPO = 'http://skia-autogen.googlecode.com/svn/gm-actual'
41 PATHSPLIT_RE = re.compile('/([^/]+)/(.+)')
42 TRUNK_DIRECTORY = os.path.dirname(os.path.dirname(os.path.dirname(
43 os.path.realpath(__file__))))
44
45 # A simple dictionary of file name extensions to MIME types. The empty string
46 # entry is used as the default when no extension was given or if the extension
47 # has no entry in this dictionary.
48 MIME_TYPE_MAP = {'': 'application/octet-stream',
49 'html': 'text/html',
50 'css': 'text/css',
51 'png': 'image/png',
52 'js': 'application/javascript',
53 'json': 'application/json'
54 }
55
56 DEFAULT_ACTUALS_DIR = '.gm-actuals'
57 DEFAULT_EXPECTATIONS_DIR = os.path.join(TRUNK_DIRECTORY, 'expectations', 'gm')
58 DEFAULT_PORT = 8888
59
60 _SERVER = None # This gets filled in by main()
61
62 class Server(object):
63 """ HTTP server for our HTML rebaseline viewer.
64
65 params:
66 actuals_dir: directory under which we will check out the latest actual
67 GM results
68 expectations_dir: directory under which to find GM expectations (they
69 must already be in that directory)
70 port: which TCP port to listen on for HTTP requests
71 export: whether to allow HTTP clients on other hosts to access this server
72 """
73 def __init__(self,
74 actuals_dir=DEFAULT_ACTUALS_DIR,
75 expectations_dir=DEFAULT_EXPECTATIONS_DIR,
76 port=DEFAULT_PORT, export=False):
77 self._actuals_dir = actuals_dir
78 self._expectations_dir = expectations_dir
79 self._port = port
80 self._export = export
81
82 def fetch_results(self):
83 """ Create self.results, based on the expectations in
84 self._expectations_dir and the latest actuals from skia-autogen.
85
86 TODO(epoger): Add a new --browseonly mode setting. In that mode,
87 the gm-actuals and expectations will automatically be updated every few
88 minutes. See discussion in https://codereview.chromium.org/24274003/ .
89 """
90 print 'Checking out latest actual GM results from %s into %s ...' % (
91 ACTUALS_SVN_REPO, self._actuals_dir)
92 actuals_repo = svn.Svn(self._actuals_dir)
93 if not os.path.isdir(self._actuals_dir):
94 os.makedirs(self._actuals_dir)
95 actuals_repo.Checkout(ACTUALS_SVN_REPO, '.')
96 else:
97 actuals_repo.Update('.')
98 print 'Parsing results from actuals in %s and expectations in %s ...' % (
99 self._actuals_dir, self._expectations_dir)
100 self.results = results.Results(
101 actuals_root=self._actuals_dir,
102 expected_root=self._expectations_dir)
103
104 def run(self):
105 self.fetch_results()
106 if self._export:
107 server_address = ('', self._port)
108 print ('WARNING: Running in "export" mode. Users on other machines will '
109 'be able to modify your GM expectations!')
110 else:
111 server_address = ('127.0.0.1', self._port)
112 http_server = BaseHTTPServer.HTTPServer(server_address, HTTPRequestHandler)
113 print 'Ready for requests on http://%s:%d' % (
114 http_server.server_name, http_server.server_port)
115 http_server.serve_forever()
116
117
118 class HTTPRequestHandler(BaseHTTPServer.BaseHTTPRequestHandler):
119 """ HTTP request handlers for various types of queries this server knows
120 how to handle (static HTML and Javascript, expected/actual results, etc.)
121 """
122 def do_GET(self):
123 """ Handles all GET requests, forwarding them to the appropriate
124 do_GET_* dispatcher. """
125 if self.path == '' or self.path == '/' or self.path == '/index.html' :
126 self.redirect_to('/static/view.html')
127 return
128 if self.path == '/favicon.ico' :
129 self.redirect_to('/static/favicon.ico')
130 return
131
132 # All requests must be of this form:
133 # /dispatcher/remainder
134 # where "dispatcher" indicates which do_GET_* dispatcher to run
135 # and "remainder" is the remaining path sent to that dispatcher.
136 normpath = posixpath.normpath(self.path)
137 (dispatcher_name, remainder) = PATHSPLIT_RE.match(normpath).groups()
138 dispatchers = {
139 'results': self.do_GET_results,
140 'static': self.do_GET_static,
141 }
142 dispatcher = dispatchers[dispatcher_name]
143 dispatcher(remainder)
144
145 def do_GET_results(self, result_type):
146 """ Handle a GET request for GM results.
147 For now, we ignore the remaining path info, because we only know how to
148 return all results.
149
150 TODO(epoger): Unless we start making use of result_type, remove that
151 parameter."""
152 print 'do_GET_results: sending results of type "%s"' % result_type
153 response_dict = _SERVER.results.GetAll()
154 if response_dict:
155 self.send_json_dict(response_dict)
156 else:
157 self.send_error(404)
158
159 def do_GET_static(self, path):
160 """ Handle a GET request for a file under the 'static' directory. """
161 print 'do_GET_static: sending file "%s"' % path
162 self.send_file(posixpath.join('static', path))
163
164 def redirect_to(self, url):
165 """ Redirect the HTTP client to a different url. """
166 self.send_response(301)
167 self.send_header('Location', url)
168 self.end_headers()
169
170 def send_file(self, path):
171 """ Send the contents of the file at this path, with a mimetype based
172 on the filename extension. """
173 # Grab the extension if there is one
174 extension = os.path.splitext(path)[1]
175 if len(extension) >= 1:
176 extension = extension[1:]
177
178 # Determine the MIME type of the file from its extension
179 mime_type = MIME_TYPE_MAP.get(extension, MIME_TYPE_MAP[''])
180
181 # Open the file and send it over HTTP
182 if os.path.isfile(path):
183 with open(path, 'rb') as sending_file:
184 self.send_response(200)
185 self.send_header('Content-type', mime_type)
186 self.end_headers()
187 self.wfile.write(sending_file.read())
188 else:
189 self.send_error(404)
190
191 def send_json_dict(self, json_dict):
192 """ Send the contents of this dictionary in JSON format, with a JSON
193 mimetype. """
194 self.send_response(200)
195 self.send_header('Content-type', 'application/json')
196 self.end_headers()
197 json.dump(json_dict, self.wfile)
198
199
200 def main():
201 parser = argparse.ArgumentParser()
202 parser.add_argument('--actuals-dir',
203 help=('Directory into which we will check out the latest '
204 'actual GM results. If this directory does not '
205 'exist, it will be created. Defaults to %(default)s'),
206 default=DEFAULT_ACTUALS_DIR)
207 parser.add_argument('--expectations-dir',
208 help=('Directory under which to find GM expectations; '
209 'defaults to %(default)s'),
210 default=DEFAULT_EXPECTATIONS_DIR)
211 parser.add_argument('--export', action='store_true',
212 help=('Instead of only allowing access from HTTP clients '
213 'on localhost, allow HTTP clients on other hosts '
214 'to access this server. WARNING: doing so will '
215 'allow users on other hosts to modify your '
216 'GM expectations!'))
217 parser.add_argument('--port',
218 help=('Which TCP port to listen on for HTTP requests; '
219 'defaults to %(default)s'),
220 default=DEFAULT_PORT)
221 args = parser.parse_args()
222 global _SERVER
223 _SERVER = Server(expectations_dir=args.expectations_dir,
224 port=args.port, export=args.export)
225 _SERVER.run()
226
227 if __name__ == '__main__':
228 main()
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