tools/perf/profile_creators/extensions_profile_creator.py

   1 # Copyright 2014 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import json
   6 import logging
   7 import os
   8 import platform
   9 import shutil
  10 import socket
  11 import sys
  12 import tempfile
  13 import time
  14 import urllib2
  15 import zipfile
  16
  17 from telemetry.page import profile_creator
  18
  19 import page_sets
  20
  21
  22 def _ExternalExtensionsPath():
  23   """Returns the OS-dependent path at which to install the extension deployment
  24    files"""
  25   if platform.system() == 'Darwin':
  26     return os.path.join('/Library', 'Application Support', 'Google', 'Chrome',
  27         'External Extensions')
  28   elif platform.system() == 'Linux':
  29     return os.path.join('/opt', 'google', 'chrome', 'extensions' )
  30   else:
  31     raise NotImplementedError('Extension install on %s is not yet supported' %
  32         platform.system())
  33
  34 def _DownloadExtension(extension_id, output_dir):
  35   """Download an extension to disk.
  36
  37   Args:
  38     extension_id: the extension id.
  39     output_dir: Directory to download into.
  40
  41   Returns:
  42     Extension file downloaded."""
  43   extension_download_path = os.path.join(output_dir, "%s.crx" % extension_id)
  44   extension_url = (
  45       "https://clients2.google.com/service/update2/crx?response=redirect"
  46       "&x=id%%3D%s%%26lang%%3Den-US%%26uc" % extension_id)
  47   response = urllib2.urlopen(extension_url)
  48   assert(response.getcode() == 200)
  49
  50   with open(extension_download_path, "w") as f:
  51     f.write(response.read())
  52
  53   return extension_download_path
  54
  55 def _GetExtensionInfoFromCRX(crx_path):
  56   """Parse an extension archive and return information.
  57
  58   Note:
  59     The extension name returned by this function may not be valid
  60   (e.g. in the case of a localized extension name).  It's use is just
  61   meant to be informational.
  62
  63   Args:
  64     crx_path: path to crx archive to look at.
  65
  66   Returns:
  67     Tuple consisting of:
  68     (crx_version, extension_name)"""
  69   crx_zip = zipfile.ZipFile(crx_path)
  70   manifest_contents = crx_zip.read('manifest.json')
  71   decoded_manifest = json.loads(manifest_contents)
  72   crx_version = decoded_manifest['version']
  73   extension_name = decoded_manifest['name']
  74
  75   return (crx_version, extension_name)
  76
  77 class ExtensionsProfileCreator(profile_creator.ProfileCreator):
  78   """Virtual base class for profile creators that install extensions.
  79
  80   Extensions are installed using the mechanism described in
  81   https://developer.chrome.com/extensions/external_extensions.html .
  82
  83   Subclasses are meant to be run interactively.
  84   """
  85
  86   def __init__(self):
  87     super(ExtensionsProfileCreator, self).__init__()
  88     self._page_set = page_sets.Typical25()
  89
  90     # Directory into which the output profile is written.
  91     self._output_profile_path = None
  92
  93     # List of extensions to install.
  94     self._extensions_to_install = []
  95
  96     # Theme to install (if any).
  97     self._theme_to_install = None
  98
  99     # Directory to download extension files into.
 100     self._extension_download_dir = None
 101
 102     # Have the extensions been installed yet?
 103     self._extensions_installed = False
 104
 105     # List of files to delete after run.
 106     self._files_to_cleanup = []
 107
 108   def _PrepareExtensionInstallFiles(self):
 109     """Download extension archives and create extension install files."""
 110     extensions_to_install = self._extensions_to_install
 111     if self._theme_to_install:
 112       extensions_to_install = extensions_to_install + [self._theme_to_install]
 113     num_extensions = len(extensions_to_install)
 114     if not num_extensions:
 115       raise ValueError("No extensions or themes to install:",
 116           extensions_to_install)
 117
 118     # Create external extensions path if it doesn't exist already.
 119     external_extensions_dir = _ExternalExtensionsPath()
 120     if not os.path.isdir(external_extensions_dir):
 121       os.makedirs(external_extensions_dir)
 122
 123     self._extension_download_dir = tempfile.mkdtemp()
 124
 125     for i in xrange(num_extensions):
 126       extension_id = extensions_to_install[i]
 127       logging.info("Downloading %s - %d/%d" % (
 128           extension_id, (i + 1), num_extensions))
 129       extension_path = _DownloadExtension(extension_id,
 130           self._extension_download_dir)
 131       (version, name) = _GetExtensionInfoFromCRX(extension_path)
 132       extension_info = {'external_crx' : extension_path,
 133           'external_version' : version,
 134           '_comment' : name}
 135       extension_json_path = os.path.join(external_extensions_dir,
 136           "%s.json" % extension_id)
 137       with open(extension_json_path, 'w') as f:
 138         f.write(json.dumps(extension_info))
 139         self._files_to_cleanup.append(extension_json_path)
 140
 141   def _CleanupExtensionInstallFiles(self):
 142     """Cleanup stray files before exiting."""
 143     logging.info("Cleaning up stray files")
 144     for filename in self._files_to_cleanup:
 145       os.remove(filename)
 146
 147     if self._extension_download_dir:
 148       # Simple sanity check to lessen the impact of a stray rmtree().
 149       if len(self._extension_download_dir.split(os.sep)) < 3:
 150         raise Exception("Path too shallow: %s" % self._extension_download_dir)
 151       shutil.rmtree(self._extension_download_dir)
 152       self._extension_download_dir = None
 153
 154   def CustomizeBrowserOptions(self, options):
 155     self._output_profile_path = options.output_profile_path
 156
 157   def WillRunTest(self, options):
 158     """Run before browser starts.
 159
 160     Download extensions and write installation files."""
 161     super(ExtensionsProfileCreator, self).WillRunTest(options)
 162
 163     # Running this script on a corporate network or other managed environment
 164     # could potentially alter the profile contents.
 165     hostname = socket.gethostname()
 166     if hostname.endswith('corp.google.com'):
 167       raise Exception("It appears you are connected to a corporate network "
 168           "(hostname=%s).  This script needs to be run off the corp "
 169           "network." % hostname)
 170
 171     prompt = ("\n!!!This script must be run on a fresh OS installation, "
 172         "disconnected from any corporate network. Are you sure you want to "
 173         "continue? (y/N) ")
 174     if (raw_input(prompt).lower() != 'y'):
 175       sys.exit(-1)
 176     self._PrepareExtensionInstallFiles()
 177
 178   def DidRunTest(self, browser, results):
 179     """Run before exit."""
 180     super(ExtensionsProfileCreator, self).DidRunTest()
 181     # Do some basic sanity checks to make sure the profile is complete.
 182     installed_extensions = browser.extensions.keys()
 183     if not len(installed_extensions) == len(self._extensions_to_install):
 184       # Diagnosing errors:
 185       # Too many extensions: Managed environment may be installing additional
 186       # extensions.
 187       raise Exception("Unexpected number of extensions installed in browser",
 188           installed_extensions)
 189
 190     # Check that files on this list exist and have content.
 191     expected_files = [
 192         os.path.join('Default', 'Network Action Predictor')]
 193     for filename in expected_files:
 194       filename = os.path.join(self._output_profile_path, filename)
 195       if not os.path.getsize(filename) > 0:
 196         raise Exception("Profile not complete: %s is zero length." % filename)
 197
 198     self._CleanupExtensionInstallFiles()
 199
 200   def CanRunForPage(self, page):
 201     # No matter how many pages in the pageset, just perform two test iterations.
 202     return page.page_set.pages.index(page) < 2
 203
 204   def MeasurePage(self, _, tab, results):
 205     # Profile setup works in 2 phases:
 206     # Phase 1: When the first page is loaded: we wait for a timeout to allow
 207     #     all extensions to install and to prime safe browsing and other
 208     #     caches.  Extensions may open tabs as part of the install process.
 209     # Phase 2: When the second page loads, page_runner closes all tabs -
 210     #     we are left with one open tab, wait for that to finish loading.
 211
 212     # Sleep for a bit to allow safe browsing and other data to load +
 213     # extensions to install.
 214     if not self._extensions_installed:
 215       sleep_seconds = 5 * 60
 216       logging.info("Sleeping for %d seconds." % sleep_seconds)
 217       time.sleep(sleep_seconds)
 218       self._extensions_installed = True
 219     else:
 220       # Phase 2: Wait for tab to finish loading.
 221       for i in xrange(len(tab.browser.tabs)):
 222         t = tab.browser.tabs[i]
 223         t.WaitForDocumentReadyStateToBeComplete()