I have my backend developed in java which does all kind of processing. And my frontend is developed using python's flask framework. I am using requests to send a request and get a response from the apis present in java.
Following is the line in my code which does that:
req = requests.post(buildApiUrl.getUrl('user') + "/login", data=payload) My problem is, sometimes when the tomcat instance is not running or there is some issue with java apis, I always get an error from requests as follows:
ERROR:root:HTTPConnectionPool(host='localhost', port=8080): Max retries exceeded with url: /MYAPP/V1.0/user/login (Caused by <class 'socket.error'>: [Errno 111] Connection refused) Traceback (most recent call last): File "/home/rahul/git/myapp/webapp/views/utils.py", line 31, in decorated_view return_value = func(*args, **kwargs) File "/home/rahul/git/myapp/webapp/views/public.py", line 37, in login req = requests.post(buildApiUrl.getUrl('user') + "/login", data=payload) File "/home/rahul/git/myapp/venv/local/lib/python2.7/site-packages/requests/api.py", line 88, in post return request('post', url, data=data, **kwargs) File "/home/rahul/git/myapp/venv/local/lib/python2.7/site-packages/requests/api.py", line 44, in request return session.request(method=method, url=url, **kwargs) File "/home/rahul/git/myapp/venv/local/lib/python2.7/site-packages/requests/sessions.py", line 335, in request resp = self.send(prep, **send_kwargs) File "/home/rahul/git/myapp/venv/local/lib/python2.7/site-packages/requests/sessions.py", line 438, in send r = adapter.send(request, **kwargs) File "/home/rahul/git/myapp/venv/local/lib/python2.7/site-packages/requests/adapters.py", line 327, in send raise ConnectionError(e) ConnectionError: HTTPConnectionPool(host='localhost', port=8080): Max retries exceeded with url: /MYAPP/V1.0/user/login (Caused by <class 'socket.error'>: [Errno 111] Connection refused) I want to handle any such errors that I receive in my flask app so that I can give the necessary response on the web page instead of showing blank screen. So how can I achieve this?
