Repository: urllib3/urllib3

Issue:
AppEngine tests failing on travis
```
Traceback (most recent call last):
  File ".tox/gae/bin/nosetests", line 11, in <module>
    sys.exit(run_exit())
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nose/core.py", line 121, in __init__
    **extra_args)
  File "/opt/python/2.7.9/lib/python2.7/unittest/main.py", line 94, in __init__
    self.parseArgs(argv)
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nose/core.py", line 145, in parseArgs
    self.config.configure(argv, doc=self.usage())
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nose/config.py", line 346, in configure
    self.plugins.configure(options, self)
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nose/plugins/manager.py", line 284, in configure
    cfg(options, config)
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nose/plugins/manager.py", line 99, in __call__
    return self.call(*arg, **kw)
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nose/plugins/manager.py", line 167, in simple
    result = meth(*arg, **kw)
  File "/home/travis/build/shazow/urllib3/.tox/gae/lib/python2.7/site-packages/nosegae.py", line 91, in configure
    import dev_appserver
ImportError: No module named dev_appserver
ERROR: InvocationError: '/home/travis/build/shazow/urllib3/.tox/gae/bin/nosetests -c /home/travis/build/shazow/urllib3/test/appengine/nose.cfg test/appengine'
```

https://travis-ci.org/shazow/urllib3/jobs/76562407

@jonparrott Could you take a look please?



Discussion:
The newest version of the cloud sdk no longer includes the app engine sdk. I have code to fix this in another repo, I'll try to fix this tomorrow evening (PST).


Resolving patch:
diff --git a/_travis/fetch_gae_sdk.py b/_travis/fetch_gae_sdk.py
new file mode 100644
--- /dev/null
+++ b/_travis/fetch_gae_sdk.py
@@ -0,0 +1,100 @@
+#!/usr/bin/env python
+
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Retrieved from https://github.com/Google/oauth2client
+
+"""Fetch the most recent GAE SDK and decompress it in the current directory.
+
+Usage:
+    fetch_gae_sdk.py [<dest_dir>]
+
+Current releases are listed here:
+    https://www.googleapis.com/storage/v1/b/appengine-sdks/o?prefix=featured
+"""
+
+import json
+import os
+import StringIO
+import sys
+import urllib2
+import zipfile
+
+_SDK_URL = (
+    'https://www.googleapis.com/storage/v1/b/appengine-sdks/o?prefix=featured')
+
+
+def get_gae_versions():
+    try:
+        version_info_json = urllib2.urlopen(_SDK_URL).read()
+    except:
+        return {}
+    try:
+        version_info = json.loads(version_info_json)
+    except:
+        return {}
+    return version_info.get('items', {})
+
+
+def _version_tuple(v):
+    version_string = os.path.splitext(v['name'])[0].rpartition('_')[2]
+    return tuple(int(x) for x in version_string.split('.'))
+
+
+def get_sdk_urls(sdk_versions):
+    python_releases = [
+        v for v in sdk_versions
+        if v['name'].startswith('featured/google_appengine')]
+    current_releases = sorted(python_releases, key=_version_tuple, reverse=True)
+    return [release['mediaLink'] for release in current_releases]
+
+
+def main(argv):
+    if len(argv) > 2:
+        print 'Usage: {} [<destination_dir>]'.format(argv[0])
+        return 1
+    dest_dir = argv[1] if len(argv) > 1 else '.'
+    if not os.path.exists(dest_dir):
+        os.makedirs(dest_dir)
+
+    if os.path.exists(os.path.join(dest_dir, 'google_appengine')):
+        print 'GAE SDK already installed at {}, exiting.'.format(dest_dir)
+        return 0
+
+    sdk_versions = get_gae_versions()
+    if not sdk_versions:
+        print 'Error fetching GAE SDK version info'
+        return 1
+    sdk_urls = get_sdk_urls(sdk_versions)
+    for sdk_url in sdk_urls:
+        try:
+            sdk_contents = StringIO.StringIO(urllib2.urlopen(sdk_url).read())
+            break
+        except:
+            pass
+    else:
+        print 'Could not read SDK from any of ', sdk_urls
+        return 1
+    sdk_contents.seek(0)
+    try:
+        zip_contents = zipfile.ZipFile(sdk_contents)
+        zip_contents.extractall(dest_dir)
+        print 'GAE SDK Installed to {}.'.format(dest_dir)
+    except:
+        print 'Error extracting SDK contents'
+        return 1
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv[:]))


Test patch: