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..fc672cf609d698e6a6d56536a67edf1bef57bab4 |
--- /dev/null |
+++ b/chrome/common/extensions/docs/server2/chrome_version_utility.py |
@@ -0,0 +1,51 @@ |
+# 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 |
+import os |
+ |
+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): |
+ self._base_path = base_path |
+ self._fetcher = fetcher |
+ self._object_store = object_store_creator.Create(ChromeVersionUtility, |
+ channel=None) |
+ |
+ def GetBranchNumberForVersion(self, version): |
+ '''Returns the most recent branch number for a given chrome version number |
+ using data stored on omahaproxy (see url_constants) |
+ ''' |
+ if version == 'trunk': |
+ return 'trunk' |
+ |
+ branch = self._object_store.Get(str(version)).Get() |
+ if branch is not None: |
+ return branch |
+ version_json = json.loads(self._fetcher.Fetch(self._base_path).content) |
+ for entry in version_json['events']: |
+ # Here, entry['title'] looks like: 'title - version#.#.branch#.#' |
+ version_title = entry['title'].split(' - ')[1].split('.') |
+ if version_title[0] == str(version): |
+ self._object_store.Set(str(version), version_title[2]) |
+ return int(version_title[2]) |
+ raise ValueError( |
+ 'A branch number for the given version could not be determined') |
+ |
+ def GetLatestVersionNumber(self): |
+ version_json = json.loads(self._fetcher.Fetch(self._base_path).content) |
+ 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 |