Non-async get() is broken on AppEngine

[ayust]

  File "/base/data/home/apps/s~evecerts/1.381400983092398120/evelink/api.py", line 510, in wrapper
    kw['api_result'] = client.api.get(self.path, params=params)
  File "/base/data/home/apps/s~evecerts/1.381400983092398120/evelink/api.py", line 265, in get
    response, robj = self.send_request(full_path, params)
  File "/base/data/home/apps/s~evecerts/1.381400983092398120/evelink/appengine/api.py", line 87, in send_request
    return self.send_request_async(url, params).get_result()
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 325, in get_result
    self.check_success()
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 368, in _help_tasklet_along
    value = gen.throw(exc.__class__, exc, tb)
  File "/base/data/home/apps/s~evecerts/1.381400983092398120/evelink/appengine/api.py", line 99, in send_request_async
    headers=headers,
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/tasklets.py", line 371, in _help_tasklet_along
    value = gen.send(val)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/ext/ndb/context.py", line 1275, in urlfetch
    validate_certificate=validate_certificate)
  File "/base/data/home/runtimes/python27/python27_lib/versions/1/google/appengine/api/urlfetch.py", line 326, in make_fetch_call
    request.set_payload(payload)
  File "cpp_message.pyx", line 124, in cpp_message.SetScalarAccessors.Setter (third_party/apphosting/python/protobuf/proto1/cpp_message.cc:2229)
TypeError: <type 'dict'> has type <type 'dict'>, but expected one of: str, unicode

[ericroberts]

Hello! How was this issue resolved? We are having a similar issue on appengine with httplib. We have looked at your commit that closed this issue, which indicated the body of a request must be str, but after double-checking that we still get this same type-dict exception. Any thoughts you remember?

[ayust]

@ericroberts Check the types of the arguments you're passing to urlfetch, e.g. the params argument or other position/keyword arguments. It may be useful to dump their types to a log immediately before you make the call to urlfetch to double-check. The failure case here was because we weren't urlencodeing our params value (since the requests library expects a dictionary instead).

[ericroberts]

@ayust thanks! We actually had solved our problem but were accidentally not serving the fixed code. Thank you for your fast response though!

[Manoj-nathwani]

Was just having the same issue with my own appengine project and solved it by json encoding my payload & setting the content type in headers.

import json
from google.appengine.api import urlfetch

urlfetch.fetch(
    method=urlfetch.POST,
    url=url,
    payload=json.dumps(data),
    headers={'Content-Type': 'application/json'}
)