Use correct variable name for request body length

modules/adblockplus/files/mimeo.py

 #!/usr/bin/env python3
 
 import argparse
 import re
 import sys
 import threading
 import traceback
 
 from http.server import BaseHTTPRequestHandler, HTTPServer
 from string import Template
@@ skipping 23 matching lines @@
     def write_info(self, args):
         message = Template(self.format).safe_substitute(args) + '\n'
         with _lock:
             self.output.write(message)
             self.output.flush()
 
     def do_POST(self):
         status = 200
         content = bytes(self.response, 'UTF-8')
         request_body_len = int(self.headers.get('content-length', 0))
-        request_body = self.rfile.read(body_len).decode('UTF-8')
+        request_body = self.rfile.read(request_body_len).decode('UTF-8')
         values = {
             'remote_addr': self.address_string(),
             'time_local': self.log_date_time_string(),
             'request': self.requestline,
             'status': status,
             'bytes_sent': len(content),
             'request_body': request_body,
         }
         values.update(self.get_header_values())
         try:
@@ skipping 27 matching lines @@
         fh = open(sys.stdout.fileno(), 'w', closefd=False)
     try:
         Handler.output = fh
         Handler.format = args.format
         Handler.response = args.response
         server_address = ('', args.port)
         httpd = HTTPServer(server_address, Handler)
         httpd.serve_forever()
     finally:
         fh.close()