Update: Here's a small wsgi test script, tested with a fresh apache mod_wsgi installation (through pip).
The same issue can be easily replicated, and it seems that the only way to improve it is with the request timeout values (header and body), which sadly needs to be high when using AWS due to how the load balancer works (keeping open connections to the apache server to improve loading time). The same issue happens with another server like gunicorn, which they clearly state on their docs it's an issue that WILL happen unless the reverse proxy (nginx) is properly set up. Now for Apache + mod_wsgi, I would expect that apache is the reverse proxy (even if there's a load balancer before it) and it should help with the issue just like nginx and gunicorn, or even IIS + asp.net from flask import Flask, request, jsonify # pip install Flask # Testing flask # export FLASK_APP=app.py # flask run # Testing mod_wsgi # pip install mod_wsgi (and apache2 + apache2-dev before this if it's not installed) # Create user wsgi or change user # sudo -u wsgi mod_wsgi-express start-server app.py --port 8080 --body-timeout 62 # Set --body-timeout to simulate AWS setup # Interesting settings # --connect-timeout defaults to 15s # --queue-timeout defaults to 30s # --body-timeout defaults to 15s # Test slowloris: # apt-get install slowhttptest # 6 or a value > configured worked threads*processes # slowhttptest -c 6 -B -i 10 -r 200 -s 8192 -t POST -u "https://localhost:8080/test"; -x 10 -p 3 # Note that GET also works in which case the request should be pretty much ignored since it's an unsupported method app = Flask(__name__) application = app # For mod_wsgi @app.route('/test', methods=['POST']) def test(): data = request.get_json(silent=True) or request.form if not data: r = jsonify({ 'out': '', 'err': 'No data provided' }) r.status_code = 400 else: r = jsonify({ 'out': data, 'err': None }) r.status_code = 200 return r -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/modwsgi. For more options, visit https://groups.google.com/d/optout.
