Index: chrome/common/extensions/docs/server2/chrome_version_utility.py |
diff --git a/chrome/common/extensions/docs/server2/chrome_version_utility.py b/chrome/common/extensions/docs/server2/chrome_version_utility.py |
new file mode 100644 |
index 0000000000000000000000000000000000000000..0d9426c769e1fb053ac71c2b9e0d81fcfb0ea81f |
--- /dev/null |
+++ b/chrome/common/extensions/docs/server2/chrome_version_utility.py |
@@ -0,0 +1,66 @@ |
+# Copyright (c) 2013 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. |
+ |
+import json |
+import logging |
+ |
+class ChromeVersionUtility(object): |
+ '''Generates and stores API data sources corresponding to the latest branch |
+ number for a given version of Chrome. |
+ |
+ Accesses data found on omahaproxy in order to link branch numbers to version |
+ numbers. |
+ ''' |
+ |
+ def __init__(self, |
+ base_path, |
+ fetcher, |
+ object_store_creator_factory): |
+ self._base_path = base_path |
+ self._fetcher = fetcher |
+ object_store_creator = object_store_creator_factory.Create( |
+ ChromeVersionUtility) |
+ self._object_store = object_store_creator.Create() |
+ |
+ def GetBranchNumberForVersion(self, version_number): |
+ '''Returns the most recent branch number for a given chrome version number |
+ using data stored on omahaproxy (see url_constants) |
+ ''' |
+ if version_number == 'trunk': |
+ return 'trunk' |
+ |
+ branch = self._object_store.Get(version_number).Get() |
+ |
+ if branch is not None: |
+ return branch |
+ |
+ try: |
+ version_json = json.loads(self._fetcher.Fetch(self._base_path).content) |
+ except Exception as e: |
+ # If omahaproxy is having problems, report it. |
+ logging.error('Could not fetch data at Omaha Proxy: %s' % (e)) |
+ return None |
+ |
+ # Here, entry['title'] looks like: 'title - version#.#.branch#.#' |
+ for entry in version_json['events']: |
+ version_title = entry['title'].split(' - ')[1].split('.') |
+ if version_title[0] == version_number: |
+ self._object_store.Set(version_number, version_title[2]) |
+ return version_title[2] |
+ return None |
+ |
+ def GetLatestVersionNumber(self): |
+ try: |
+ version_json = json.loads(self._fetcher.Fetch(self._base_path).content) |
+ except Exception as e: |
+ logging.error('Could not fetch data at Omaha Proxy: %s' % (e)) |
+ return None |
+ |
+ latest_version = 0 |
+ for entry in version_json['events']: |
+ version_title = entry['title'].split(' - ')[1].split('.') |
+ version = int(version_title[0]) |
+ if version > latest_version: |
+ latest_version = version |
+ return latest_version |