I have the following (simplified) FBV:
def check_existing_contacts(request):
if request.is_ajax and request.method == "GET":
print('Function called')
return mailgun_validate_email(request)
return JsonResponse({"error": "Incorrect AJAX / GET request."}, status=400)
I want to test that the mailgun_validate_email function is called:
class TestCheckExistingContacts(TestCase):
#patch('myapp.mailgun_validate_email')
def test_new_contact(self, mock):
client = Client()
client.get('/check/', HTTP_X_REQUESTED_WITH='XMLHttpRequest')
self.assertTrue(mock.called)
I am certain the test calls mailgun_validate_email as the print('Function called') displays in the console. However I get an assertion error that the mock.called is False.
Where am I going wrong / how can I debug this?
************ UPDATE *******************
When patching the function in the same module as the view, I get the following error:
class TestCheckExistingContacts(TestCase):
#patch('[path to views.py with check_existing_contacts].mailgun_validate_email')
def test_new_contact(self, mock):
client = Client()
client.get('/check/', HTTP_X_REQUESTED_WITH='XMLHttpRequest')
self.assertTrue(mock.called)
Results in:
Failure
Traceback (most recent call last):
File "\tests\test_utils.py", line 123, in test_new_contact
response = self.client.get('/validate/',
File "\.venv\lib\site-packages\django\test\client.py", line 518, in get
response = super().get(path, data=data, secure=secure, **extra)
File "\.venv\lib\site-packages\django\test\client.py", line 344, in get
return self.generic('GET', path, secure=secure, **{
File "\.venv\lib\site-packages\django\test\client.py", line 421, in generic
return self.request(**r)
File "\.venv\lib\site-packages\django\test\client.py", line 496, in request
raise exc_value
File "\.venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "\.venv\lib\site-packages\django\utils\deprecation.py", line 96, in __call__
response = self.process_response(request, response)
File "\.venv\lib\site-packages\django\contrib\sessions\middleware.py", line 45, in process_response
patch_vary_headers(response, ('Cookie',))
File "\.venv\lib\site-packages\django\utils\cache.py", line 267, in patch_vary_headers
vary_headers = cc_delim_re.split(response['Vary'])
TypeError: expected string or bytes-like object
If you did from myapp import mailgun_validate_email for check_existing_contacts, then you need to patch the reference in that module instead of myapp.
E.g. if the import is in myapp/views.py, then patch myapp.views.mailgun_validate_email.
The view needs to return an instance of HttpResponse or one of its subclasses, same for mailgun_validate_email since you directly return mailgun_validate_email(...).
# #patch('myapp.mailgun_validate_email') # Change this
#patch('myapp.views.mailgun_validate_email', return_value=JsonResponse({})) # to this
Related
I'm trying to use Authlib library to access new eBay REST API (as Authorization code grant)
Here is my code;
import json
import os
import webbrowser
from time import time
from authlib.integrations.requests_client import OAuth2Session
from rpi_order_data_sync import settings
def auth(seller):
def token_updater(token, seller=seller):
if not os.path.exists(seller):
open(seller, "w").close()
with open(seller, "w") as token_file:
json.dump(token, token_file)
scope = ["https://api.ebay.com/oauth/api_scope/sell.fulfillment.readonly"]
if not os.path.exists(seller):
ebay = OAuth2Session(
settings.E_APP_ID,
settings.E_CERT_ID,
redirect_uri=settings.E_RU_NAME,
scope=scope,
)
uri, state = ebay.create_authorization_url(
"https://auth.sandbox.ebay.com/oauth2/authorize",
)
print("Please go to {} and authorize access.".format(uri))
try:
webbrowser.open_new_tab(uri)
except webbrowser.Error:
pass
authorization_response = input("Please enter callback URL: ") # nosec
token = ebay.fetch_token(
"https://api.sandbox.ebay.com/identity/v1/oauth2/token",
authorization_response=authorization_response,
)
print(token)
token_updater(token)
return ebay
The problem is eBay's token response has an unconventional token type named "User Access Token" instead of "Bearer". Therefore I get this error;
Traceback (most recent call last):
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/authlib/integrations/requests_client/oauth2_session.py", line 37, in __call__
req.url, req.headers, req.body = self.prepare(
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/authlib/oauth2/auth.py", line 91, in prepare
sign = self.SIGN_METHODS[token_type.lower()]
KeyError: 'user access token'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/bin/rods", line 11, in <module>
load_entry_point('rpi-order-data-sync', 'console_scripts', 'rods')()
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/click/core.py", line 829, in __call__
return self.main(*args, **kwargs)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/click/core.py", line 782, in main
rv = self.invoke(ctx)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/click/core.py", line 1259, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/click/core.py", line 1066, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/click/core.py", line 610, in invoke
return callback(*args, **kwargs)
File "/home/thiras/HDD/freelancer/contentassasin/rpi-order-data-sync/rpi_order_data_sync/main.py", line 132, in sync_ebay_orders
orders = ebay.get(
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/requests/sessions.py", line 543, in get
return self.request('GET', url, **kwargs)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/authlib/integrations/requests_client/oauth2_session.py", line 113, in request
return super(OAuth2Session, self).request(
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/requests/sessions.py", line 516, in request
prep = self.prepare_request(req)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/requests/sessions.py", line 449, in prepare_request
p.prepare(
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/requests/models.py", line 318, in prepare
self.prepare_auth(auth, url)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/requests/models.py", line 549, in prepare_auth
r = auth(self)
File "/home/thiras/.local/share/virtualenvs/rpi-order-data-sync-tA0i1rrc/lib/python3.8/site-packages/authlib/integrations/requests_client/oauth2_session.py", line 41, in __call__
raise UnsupportedTokenTypeError(description=description)
authlib.integrations.base_client.errors.UnsupportedTokenTypeError: unsupported_token_type: Unsupported token_type: 'user access token'
I've noticed Compliance fix for non-standard section at Authlib documentation but couldn't figure out how to do this fix or even possible in this way.
I've found a solution and it also works with requests-oauthlib package. It seems working flawlessly so far. The main struggle was to create a fake request.Response model since request.Response has no setter for .text or .content attributes so modifying them was impossible.
So I've created a FakeResponse class that only mimics .json() method since it was the only method used by Authlib.
class FakeResponse:
""" Fake Class for Request Response class. """
def __init__(self, data):
self.data = data
def json(self):
""" Mocks requests.Response.json(). """
return self.data
After that I've created an access_token_response hook;
def non_compliant_token_type(resp):
data = resp.json()
data["token_type"] = "Bearer"
fake_resp = FakeResponse(data=data)
return fake_resp
Please let me know if you have a better answer or any recommendations to improve it.
Context
AWS Elastic Beanstalk Worker tiers can be configured to accept a single AWS SQS queue automatically. Incoming messages on this queue can be routed to a single endpoint which some instance in the worker tier will respond to; they show up to the workers as POST events.
The software my workers are running is based on Django/DRF.
Goal
I want my worker tier instances to be able to handle more than one type of incoming event. Ideally, SQS could be configured to deliver the requests to more than one endpoint, but that appears to be impossible.
My implementation
class DispatchSerializer(serializers.Serializer):
"`to` is the name of the destination endpoint; `payload` is the data I want delivered"
to = serializers.CharField(
max_length=80,
)
payload = serializers.JSONField()
#api_view(http_method_names=['POST'])
#permission_classes([AllowAny])
def dispatch(request):
"""
Dispatch a request to a sibling endpoint.
"""
routing_table = {
... # this is specific to my application;
# it's just a dict of names to views
}
serializer = DispatchSerializer(data=request.data)
if serializer.is_valid(raise_exception=True):
to = serializer.validated_data['to']
try:
view = routing_table[to]
except KeyError:
raise Http404()
# https://github.com/encode/django-rest-framework/blob/master/rest_framework/request.py#L183-L187
request._full_data = serializer.validated_data['payload']
return view(request)
# If this returns other than 200, SQS simply re-attempts the request later.
# No returned data is preserved, so we might as well not return any.
return Response()
As you can see, I attempt to simply replace _full_data attribute of the request with the payload, so that the inner view sees only the data intended for it (which to the dispatch view is the payload).
The problem
This implementation doesn't actually work. I get errors of this form:
Traceback (most recent call last):
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 378, in __getattribute__
return super(Request, self).__getattribute__(attr)
AttributeError: 'Request' object has no attribute 'body'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 378, in __getattribute__
return super(Request, self).__getattribute__(attr)
AttributeError: 'Request' object has no attribute 'body'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/core/handlers/exception.py", line 39, in inner
response = get_response(request)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
return view_func(*args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/views.py", line 483, in dispatch
response = self.handle_exception(exc)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/views.py", line 443, in handle_exception
self.raise_uncaught_exception(exc)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/views.py", line 480, in dispatch
response = handler(request, *args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/decorators.py", line 52, in handler
return func(*args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/project/django-backend/cardamom/worker/views.py", line 196, in dispatch
return view(request)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/views/decorators/csrf.py", line 58, in wrapped_view
return view_func(*args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/views/generic/base.py", line 68, in view
return self.dispatch(request, *args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/views.py", line 483, in dispatch
response = self.handle_exception(exc)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/views.py", line 443, in handle_exception
self.raise_uncaught_exception(exc)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/views.py", line 480, in dispatch
response = handler(request, *args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/decorators.py", line 52, in handler
return func(*args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/project/django-backend/cardamom/core/views/mailchimp.py", line 229, in wrapper
return func(*args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/project/django-backend/cardamom/worker/views.py", line 52, in wrapper
result = f(log_entry, *args, **kwargs)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/project/django-backend/cardamom/worker/views.py", line 106, in match_one
user_id = int(request.data['user_id'])
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 378, in __getattribute__
return super(Request, self).__getattribute__(attr)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 186, in data
self._load_data_and_files()
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 246, in _load_data_and_files
self._data, self._files = self._parse()
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 290, in _parse
stream = self.stream
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 378, in __getattribute__
return super(Request, self).__getattribute__(attr)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 173, in stream
self._load_stream()
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 270, in _load_stream
self._stream = six.BytesIO(self.body)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 382, in __getattribute__
return getattr(self._request, attr)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/rest_framework/request.py", line 382, in __getattribute__
return getattr(self._request, attr)
File "/mnt/d/Users/coriolinus/Documents/Toptal/cardamom/.venv/lib/python3.4/site-packages/django/http/request.py", line 264, in body
raise RawPostDataException("You cannot access body after reading from request's data stream")
django.http.request.RawPostDataException: You cannot access body after reading from request's data stream
Problem restatement
The request object is complicated; generating a new one is implausible. At the same time, we need to modify the data of this one in order to properly pass it along to the next view, so that view only sees the data in its expected format.
How can I accomplish this?
[edit] Passing an un-modified request doesn't work either
I tried editing the above example to remove any modification of the request object, and instead created the following serializer mixin:
class UndispatcherMixin:
"""
Adjust a serializer such that it can accept its normal serialization,
or alternately the payload of a DispatchSerializer.
"""
def is_valid(self, raise_exception=False):
if not hasattr(self, '_validated_data'):
assert hasattr(self, 'initial_data'), (
'Cannot call `.is_valid()` as no `data=` keyword argument was '
'passed when instantiating the serializer instance.'
)
ds = DispatchSerializer(data=self.initial_data)
if ds.is_valid(raise_exception=False):
self.initial_data = ds.validated_data['payload']
return super().is_valid(raise_exception=raise_exception)
This mixin was then added to the relevant serializers used by the downstream views. Interestingly, it failed with the same django.http.RawPostDataException as before.
It's received wisdom all over SO that you can just call your views as normal functions, so long as you pass in a proper request object. This may not actually be true, at least for the case where the view was created by the DRF #api_view decorator.
Still working on a way to actually solve this.
For whatever reason--this may be an error in DRF, but I'm not sure--you can't just call an #api_view function from within another one and pass along the request object. It just doesn't work.
What does work is to factor out the code which does the actual work, and call it separately from the #api_view function and also the dispatch view. That is, something like this:
def perform_action(request, data):
"""
Do something
`request` is included for completeness in case it's necessary,
but the data normally read from `request.data` should be read instead
from the `data` argument.
"""
serializer = ActionSerializer(data=data)
if serializer.is_valid():
... # Whatever your action should be, goes here
#api_view(http_method_names=['POST'])
#permission_classes([AllowAny])
def action(request)
perform_action(request, request.data)
return Response() # 200, no content
#api_view(http_method_names=['POST'])
#permission_classes([AllowAny])
def dispatch(request):
"""
Dispatch a request to a sibling endpoint.
"""
routing_table = {
'action': perform_action, # etc...
}
serializer = DispatchSerializer(data=request.data)
if serializer.is_valid(raise_exception=True):
to = serializer.validated_data['to']
try:
view = routing_table[to]
except KeyError:
raise Http404()
view(request, serializer.validated_data['payload'])
return Response()
The Documentation for python requests module says for hooks that "If the callback function returns a value, it is assumed that it is to replace the data that was passed in. If the function doesn’t return anything, nothing else is effected"
Now i am trying to return a value(int in my case) from my hook function and it throws an exception. This will be valid in all the cases when the return value is an object that DOESNOT have the raw() method defined for it.
Here is some code
def hook(resp,**kwargs):
print resp.url
return 1
def main()
s = requests.Session()
s.hooks = {"response":hook}
r = s.get("http://localhost/index.html")
And here is the exception:
http://localhost/index.html
Traceback (most recent call last):
File "/home/talha/ws/test.py", line 85, in <module>
main()
File "/home/talha/ws/test.py", line 72, in main
r = s.get("http://localhost/index.html")
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 347, in get
return self.request('GET', url, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 335, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 446, in send
extract_cookies_to_jar(self.cookies, request, r.raw)
AttributeError: 'int' object has no attribute 'raw'
The code in sessions.py #line 446 is trying to extract cookies after the dispatch_hook..From source
# Response manipulation hooks
r = dispatch_hook('response', hooks, r, **kwargs)
# Persist cookies
extract_cookies_to_jar(self.cookies, request, r.raw)
Either the documentation needs to change or the handling needs to be re-worked. What is the best way to handle this ?
[update]
Based on the comments I tried to return the base response object. Turns out it cannot be used in that manner also since some of its fields are initialized to None.
Newer code:
def hook(resp, **kwargs):
obj = requests.Response()
return obj
Exception thrown now:
Traceback (most recent call last):
File "/home/talha/ws/test.py", line 88, in <module>
main()
File "/home/talha/ws/test.py", line 75, in main
r = s.get("http://localhost/index.html")
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 347, in get
return self.request('GET', url, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 335, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 446, in send
extract_cookies_to_jar(self.cookies, request, r.raw)
File "/usr/lib/python2.7/site-packages/requests/cookies.py", line 108, in extract_cookies_to_jar
res = MockResponse(response._original_response.msg)
AttributeError: 'NoneType' object has no attribute '_original_response'
What seems is that i will have to implement a full pseudo response?
If the callback function returns a value, it is assumed that it is to replace the data that was passed in. If the function doesn’t return anything, nothing else is effected.
This means that whatever you return is expected to take the place of the response object you were passed.
Nothing in the documentation states that you can return just anything. What did you expect to happen instead?
If you wanted to return a response that has different data, return something that acts like a response still. This means that either you need to subclass the requests response object, or implement something that provides the same API:
from requests.models import Response
class MyIntResponse(Response):
def __init__(self, integer):
super(MyIntResponse, self).__init__()
self._content_consumed = True
self._content = integer
def hook(resp,**kwargs):
print resp.url
newresp = MyIntResponse(1)
newresp.raw = resp.raw # copy across original HTTP response object
You may want to copy over some of the other attributes from the original response; check the documentation on what attributes Response objects have.
I'm trying to write a Google-Appengine app that will fail nicely when datastore writes are disabled
Currently my main() looks like this:
def main():
make_datastore_readonly()
try:
run_wsgi_app(application)
except CapabilityDisabledError:
run_wsgi_app(NoWrite)
If I set main to:
def main():
run_wsgi_app(application)
My app displays a traceback when the exception is raised.
If I set main to:
def main():
run_wsgi_app(NoWrite)
It will properly show my error message (although for every request).
Getting back to my modified version of main, this one:
def main():
make_datastore_readonly()
try:
run_wsgi_app(application)
except CapabilityDisabledError:
run_wsgi_app(NoWrite)
Instead of getting my error message, I still get a traceback that looks like this:
Traceback (most recent call last):
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/webapp/_webapp25.py", line 703, in __call__
handler.post(*groups)
File "/Users/kevin/Sche/main.py", line 232, in post
me.put();
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/ext/db/__init__.py", line 1074, in put
return datastore.Put(self._entity, **kwargs)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/datastore.py", line 579, in Put
return PutAsync(entities, **kwargs).get_result()
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/datastore.py", line 556, in PutAsync
return _GetConnection().async_put(config, entities, local_extra_hook)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/datastore/datastore_rpc.py", line 1553, in async_put
return make_put_call(base_req, pbs, extra_hook)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/datastore/datastore_rpc.py", line 1543, in make_put_call
self.__put_hook, user_data)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/datastore/datastore_rpc.py", line 1188, in make_rpc_call
rpc.make_call(method, request, response, get_result_hook, user_data)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 519, in make_call
self.__service, method, request, response, self.__rpc)
File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/google/appengine/api/apiproxy_stub_map.py", line 207, in Call
function(service, call, request, response)
File "/Users/kevin/Sche/main.py", line 18, in hook
raise CapabilityDisabledError('Datastore is in read-only mode')
CapabilityDisabledError: Datastore is in read-only mode
So, my question is, why isn't the exception caught?
Edit:
This function is from this StackOverflow answer
def make_datastore_readonly():
"""Throw ReadOnlyError on put and delete operations."""
def hook(service, call, request, response):
assert(service == 'datastore_v3')
if call in ('Put', 'Delete'):
raise CapabilityDisabledError('Datastore is in read-only mode') //Line 18
apiproxy_stub_map.apiproxy.GetPreCallHooks().Push('readonly_datastore', hook, 'datastore_v3')
the main function only register this application. Therefore, the exception will not raise in the main function. Therefore the try ... catch statement won't work.
The way to handle this exception is defining a new RequestHandler. Then, all requests which want to have this feature should inherent from the new RequestHandler.
for example:
Class MyRequestHandler(RequestHandler):
def get(self):
try:
self.get_handler()
except CapabilityDisabledError:
pass
class MyRequest(MyRequestHandler):
def get_handler(self):
# ....
pass
While inside a callback function, I lose the ability to access flask.session, flask.g, or functions such as url_for(). They all throw an error saying that I'm "working outside of request context".
Debugging middleware caught exception in streamed response at a point where response headers were already sent.
Traceback (most recent call last):
File "C:\Python27\site-packages\sijax\response\streaming.py", line 136, in _process_call_chain
for string in generator:
File "C:\Python27\site-packages\sijax\response\streaming.py", line 109, in _process_callback
response = self._perform_handler_call(callback, args)
File "C:\Python27\site-packages\sijax\response\base.py", line 258, in _perform_handler_call
return callback(self, *args)
File "C:\Dropbox\Code\Python 2.7\FlaskTesting\testpage.py", line 18, in myformhandler
sql_session = flask.g.sql_session
File "C:\Python27\lib\site-packages\werkzeug\local.py", line 336, in __getattr__
return getattr(self._get_current_object(), name)
File "C:\Python27\lib\site-packages\werkzeug\local.py", line 295, in _get_current_object
return self.__local()
File "C:\Python27\lib\site-packages\flask\globals.py", line 19, in _lookup_object
raise RuntimeError('working outside of request context')
RuntimeError: working outside of request context
192.168.1.141 - - [20/Jun/2012 16:33:04] "POST /testpage HTTP/1.1" 200 -
I've been unable to find out how to get around this problem. Any help would be appreciated.
Python v2.7
Flask v0.8
Flask-Sijax v0.3
You may have a try with stream_with_context. The code example copied from http://flask.pocoo.org/docs/0.12/patterns/streaming/#streaming-with-context
from flask import stream_with_context, request, Response
#app.route('/stream')
def streamed_response():
def generate():
yield 'Hello '
yield request.args['name']
yield '!'
return Response(stream_with_context(generate()))
It would be helpful if you posted your code, but try wrapping your code like this:
with app.app_context():
# do stuff...
or maybe this:
with app.test_request_context():
# do stuff...