Fix Chunked Transfer Encoding on WSGI — AWS Lightsail

In this article we will discuss on how to resolve the issue the issue regarding Chunked Transfer Encoding or Status Code: 411 Length Required

Note:

Status Code: 411 Length Required error appeared on my web-app

Received Request requiring chunked transfer encoding, but optional support for the chunked transfer encoding, but optional support for the chunked transfer encoding has not been enabled: /var/www/html/{projectname}/{projectname.wsgi} error appeared on the WSGI error logs. To print the WSGI logs on Ubuntu.

Added the following on the WSGI file. WSGI file is located at the yourProjectDirectory/projectName

def chunked_reader():
    stream = flask.request.environ["wsgi.input"]
    try:
        while True:
            yield stream.next()
    except:
        return

Note: Do not forget to restart your apache using sudo service apache2 restart or sudo service apache2 reload