I am using Flask and blueprints on IIS. My issue is that when the 500 error is triggered it loads the default IIS 500 template and not what I want.
I've tried several things and this is where I am. I have the following code
from flask import render_template,Blueprint
errorbp = Blueprint("errorbp",__name__)
#errorbp.app_errorhandler(404)
def page_not_found(e):
return "404", 404
#errorbp.app_errorhandler(500)
def internal_server_error(e):
return "500", 500
If I visit a page that does not exist, I get "404" back as intended. If I create an error on purpose, I get the following
Any suggestions as to what to do? I presume I may need to do something with IIS at this point but what? I've edited/remove the 5xx status codes/page and still nothing
What you need to do is, open the error pages module, double-click the 500 status code, set the path of your template in the file path, and IIS will send the content of the file as a custom error response.
In addition, IIS has two other ways to respond to an error: by executing an URL or by redirecting the request.
Hi this is a bit of a strange issue. It doesn't occur on my local server when running with flask run but when using gunicorn and nginx the flask send_file() method or send_from_directory() which I use to allow users to download a .pdf file I crash with this error:
/home/ben/newvenv/lib/python3.7/site-packages/werkzeug/wrappers/base_response.py:479: UserWarning: The "b'session'" cookie is too large: the value was 10004 bytes but the header required 26 extra bytes. The final size was 10030 bytes but the limit is 4093 bytes. Browsers may silently ignore cookies larger than this.
samesite=samesite,
Here is the code where I call this method:
return send_from_directory(directory= directory,filename=filename, as_attachment=True)
I tried updating my nginx config to allow for larger cookies but this didn't work and also is not an ideal solution. What am I missing? Is this an issue with nginx or with the way I call the flask method? The .pdf file is not too big only ten pages long.
I fixed this by clearing the session before sending the file. Here is the code I used to clear the session variables:
def clear_session_variables(exclude=[]):
"""deletes all session variables. Useful to reset before starting new task."""
print(list(session.keys()))
for key in list(session.keys()):
if(key != '_flashes' and key != 'csrf_token' and key not in exclude):
print(key)
session.pop(key)
print(list(session.keys()))
Here is where I call the method:
clear_session_variables(exclude=['db','historical'])
return send_from_directory(directory= directory,filename=filename, as_attachment=True, mimetype='application/pdf')
I start web service on azure, deploy the python project(3), it is successfully started, and some routes like:
#app.route('/')
def OK():
return 'OK!'
working ok.
But when requesting this code:
#app.route('/predict_states/<userRequests>')
def CreatePrediction(userRequests):
predict = Predict([userRequests], model)
return jsonify(predict)
the model is:
with open("model.pkl", 'rb') as f:
model = dill.load(f)
azure return an error 500:
IIS received the request; however, an internal error occurred during the processing of the request. The root cause of this error depends on which module handles the request and what was happening in the worker process when this error occurred.
IIS was not able to access the web.config file for the Web site or application. This can occur if the NTFS permissions are set incorrectly.
IIS was not able to process configuration for the Web site or application.
The authenticated user does not have permission to use this DLL.
The request is mapped to a managed handler but the .NET Extensibility Feature is not installed.
What could be the problem?
I generate Image with Celery task in this code. this is the part of an ajax view function.
task_result = generate_result_image.apply((answer, combi.id, lang))
if task_result.state == "SUCCESS":
response['ok'] = 'yes'
return HttpResponse(json.dumps(response), content_type='application/json')
this is working locally perfectly, but in prod server, i am getting 502 bad gateway. this is the browser console msg:
what am I doing wrong? this is really mysterious..
this is the uwsgi log, the line where the cursor stands is the call I am doing. I seems, the worker is dying right after my call... no idea why..
problem solved - the bit was not my code, nor my settings but the remote server I was sending files to, to generate image. Many thanks to Alex for showing the right direction..
Github offers to send Post-receive hooks to an URL of your choice when there's activity on your repo.
I want to write a small Python command-line/background (i.e. no GUI or webapp) application running on my computer (later on a NAS), which continually listens for those incoming POST requests, and once a POST is received from Github, it processes the JSON information contained within. Processing the json as soon as I have it is no problem.
The POST can come from a small number of IPs given by github; I plan/hope to specify a port on my computer where it should get sent.
The problem is, I don't know enough about web technologies to deal with the vast number of options you find when searching.. do I use Django, Requests, sockets,Flask, microframeworks...? I don't know what most of the terms involved mean, and most sound like they offer too much/are too big to solve my problem - I'm simply overwhelmed and don't know where to start.
Most tutorials about POST/GET I could find seem to be concerned with either sending or directly requesting data from a website, but not with continually listening for it.
I feel the problem is not really a difficult one, and will boil down to a couple of lines, once I know where to go/how to do it. Can anybody offer pointers/tutorials/examples/sample code?
First thing is, web is request-response based. So something will request your link, and you will respond accordingly. Your server application will be continuously listening on a port; that you don't have to worry about.
Here is the similar version in Flask (my micro framework of choice):
from flask import Flask, request
import json
app = Flask(__name__)
#app.route('/',methods=['POST'])
def foo():
data = json.loads(request.data)
print "New commit by: {}".format(data['commits'][0]['author']['name'])
return "OK"
if __name__ == '__main__':
app.run()
Here is a sample run, using the example from github:
Running the server (the above code is saved in sample.py):
burhan#lenux:~$ python sample.py
* Running on http://127.0.0.1:5000/
Here is a request to the server, basically what github will do:
burhan#lenux:~$ http POST http://127.0.0.1:5000 < sample.json
HTTP/1.0 200 OK
Content-Length: 2
Content-Type: text/html; charset=utf-8
Date: Sun, 27 Jan 2013 19:07:56 GMT
Server: Werkzeug/0.8.3 Python/2.7.3
OK # <-- this is the response the client gets
Here is the output at the server:
New commit by: Chris Wanstrath
127.0.0.1 - - [27/Jan/2013 22:07:56] "POST / HTTP/1.1" 200 -
Here's a basic web.py example for receiving data via POST and doing something with it (in this case, just printing it to stdout):
import web
urls = ('/.*', 'hooks')
app = web.application(urls, globals())
class hooks:
def POST(self):
data = web.data()
print
print 'DATA RECEIVED:'
print data
print
return 'OK'
if __name__ == '__main__':
app.run()
I POSTed some data to it using hurl.it (after forwarding 8080 on my router), and saw the following output:
$ python hooks.py
http://0.0.0.0:8080/
DATA RECEIVED:
test=thisisatest&test2=25
50.19.170.198:33407 - - [27/Jan/2013 10:18:37] "HTTP/1.1 POST /hooks" - 200 OK
You should be able to swap out the print statements for your JSON processing.
To specify the port number, call the script with an extra argument:
$ python hooks.py 1234
I would use:
https://github.com/carlos-jenkins/python-github-webhooks
You can configure a web server to use it, or if you just need a process running there without a web server you can launch the integrated server:
python webhooks.py
This will allow you to do everything you said you need. It, nevertheless, requires a bit of setup in your repository and in your hooks.
Late to the party and shameless autopromotion, sorry.
If you are using Flask, here's a very minimal code to listen for webhooks:
from flask import Flask, request, Response
app = Flask(__name__)
#app.route('/webhook', methods=['POST'])
def respond():
print(request.json) # Handle webhook request here
return Response(status=200)
And the same example using Django:
from django.http import HttpResponse
from django.views.decorators.http import require_POST
#require_POST
def example(request):
print(request.json) # Handle webhook request here
return HttpResponse('Hello, world. This is the webhook response.')
If you need more information, here's a great tutorial on how to listen for webhooks with Python.
If you're looking to watch for changes in any repo...
1. If you own the repo that you want to watch
In your repo page, Go to settings
click webhooks, new webhook (top right)
give it your ip/endpoint and setup everything to your liking
use any server to get notified
2. Not your Repo
take the url you want i.e https://github.com/fire17/gd-xo/
add /commits/master.atom to the end such as:
https://github.com/fire17/gd-xo/commits/master.atom
Use any library you want to get that page's content, like:
filter out the keys you want, for example the element
response = requests.get("https://github.com/fire17/gd-xo/commits/master.atom").text
response.split("<updated>")[1].split("</updated>")[0]
'2021-08-06T19:01:53Z'
make a loop that checks this every so often and if this string has changed, then you can initiate a clone/pull request or do whatever you like