Problems using Go App Engine behind a proxy - google-app-engine

Question

I'm trying to run the example application hosted at: https://github.com/googlesamples/cloud-polymer-go, but when running it behind a proxy, I get the following errors:
$ goapp serve dispatch.yaml frontend/app.yaml backend/app.yaml
INFO 2015-10-13 13:04:19,461 devappserver2.py:763] Skipping SDK update check.
INFO 2015-10-13 13:04:19,526 api_server.py:205] Starting API server at: http://localhost:59441
INFO 2015-10-13 13:04:19,527 dispatcher.py:185] Starting dispatcher running at: http://localhost:8080
INFO 2015-10-13 13:04:19,529 dispatcher.py:197] Starting module "frontend" running at: http://localhost:8081
INFO 2015-10-13 13:04:19,534 dispatcher.py:197] Starting module "default" running at: http://localhost:8082
INFO 2015-10-13 13:04:19,534 admin_server.py:116] Starting admin server at: http://localhost:8000
INFO 2015-10-13 13:04:23,859 module.py:786] frontend: "GET / HTTP/1.1" 304 -
INFO 2015-10-13 13:04:23,870 module.py:786] frontend: "GET /elements/post-list.html HTTP/1.1" 304 -
INFO 2015-10-13 13:04:24,377 module.py:786] frontend: "GET /elements/post-service.html HTTP/1.1" 304 -
INFO 2015-10-13 13:04:24,377 module.py:786] frontend: "GET /elements/post-form.html HTTP/1.1" 304 -
INFO 2015-10-13 13:04:24,377 module.py:786] frontend: "GET /elements/post-card.html HTTP/1.1" 304 -
WARNING 2015-10-13 13:04:26,344 dispatcher.py:762] Skipping dispatch.yaml rules because /_ah/api/static/proxy.html is not a dispatchable path.
socket.error 101
Traceback (most recent call last):
File "/home/robert/applib/appEngine/go_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 1302, in communicate
req.respond()
File "/home/robert/applib/appEngine/go_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 831, in respond
self.server.gateway(self).respond()
File "/home/robert/applib/appEngine/go_appengine/lib/cherrypy/cherrypy/wsgiserver/wsgiserver2.py", line 2117, in respond
for chunk in response:
File "/home/robert/applib/appEngine/go_appengine/google/appengine/tools/devappserver2/endpoints/endpoints_server.py", line 121, in __call__
yield self.dispatch(request, start_response)
File "/home/robert/applib/appEngine/go_appengine/google/appengine/tools/devappserver2/endpoints/endpoints_server.py", line 138, in dispatch
start_response)
File "/home/robert/applib/appEngine/go_appengine/google/appengine/tools/devappserver2/endpoints/endpoints_server.py", line 172, in dispatch_non_api_requests
return dispatch_function(request, start_response)
File "/home/robert/applib/appEngine/go_appengine/google/appengine/tools/devappserver2/endpoints/endpoints_server.py", line 212, in handle_api_static_request
response, body = discovery_api.get_static_file(request.relative_url)
File "/home/robert/applib/appEngine/go_appengine/google/appengine/tools/devappserver2/endpoints/discovery_api_proxy.py", line 113, in get_static_file
connection.request('GET', path, None, {})
File "/usr/lib/python2.7/httplib.py", line 979, in request
self._send_request(method, url, body, headers)
File "/usr/lib/python2.7/httplib.py", line 1013, in _send_request
self.endheaders(body)
File "/usr/lib/python2.7/httplib.py", line 975, in endheaders
self._send_output(message_body)
File "/usr/lib/python2.7/httplib.py", line 835, in _send_output
self.send(msg)
File "/usr/lib/python2.7/httplib.py", line 797, in send
self.connect()
File "/usr/lib/python2.7/httplib.py", line 1178, in connect
self.timeout, self.source_address)
File "/usr/lib/python2.7/socket.py", line 571, in create_connection
raise err
error: [Errno 101] Network is unreachable
The variables:
$ echo $http_proxy
http://asusis-isa2.personal.com.py:8080/
$ echo $https_proxy
http://asusis-isa2.personal.com.py:8080/
Are correctly set.
I works with a direct Internet connection.
I'm under Ubuntu 14.04.

Answer 1

EDIT Looks like there is a defect in the SDK around using a proxy with URLFetch.
https://code.google.com/p/googleappengine/issues/detail?id=544
Try setting the uppercase versions of those environment variables, HTTP_PROXY and HTTPS_PROXY. The gcloud launcher requires them that way so I assume goapp does as well.
Using an HTTP proxy
If you are running gcloud preview app behind an HTTP proxy, you must
tell gcloud preview app the name of the proxy. To set an HTTP proxy
for gcloud preview app, set the http_proxy and https_proxy environment
variables. Note that you must specify the full path for the app.yaml
file.
Using Windows (in Command Prompt):
$ set HTTP_PROXY=http://cache.mycompany.com:3128
$ set HTTPS_PROXY=http://cache.mycompany.com:3128
$ gcloud preview app deploy DIRECTORY/app.yaml
Using the command line in Mac OS X (in Terminal) or Linux:
$ export HTTP_PROXY="http://cache.mycompany.com:3128"
$ export HTTPS_PROXY="http://cache.mycompany.com:3128"
$ gcloud preview app deploy DIRECTORY/app.yaml