#2687 - Include mimeo python module

modules/adblockplus/files/mimeo.py

+#!/usr/bin/env python3
+
+import argparse
+import logging
+import sys
+
+from http.server import BaseHTTPRequestHandler, HTTPServer
+from string import Template
+
+PUNCTUATION = """!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~ """
+PROXY_TOKEN = 'http_'
+
+
+class Handler(BaseHTTPRequestHandler):
+    def get_header_values(self):
+        values = {}
+        for var in self.log_format.split():
+            name = var.strip(PUNCTUATION)

[Vasily Kuznetsov, 2017/08/07 20:46:01]

You've added a space to PUNCTUATION above, but do you really need it? Since
`var` is coming out of `....split()` above, it should already have no spaces in
it, or am I missing something?

[f.lopez, 2017/08/08 02:48:17]

Done.

+            if name.startswith(PROXY_TOKEN):
+                new_var = name[len(PROXY_TOKEN):].title()
+                values[name] = self.headers.get(new_var, '-')
+        return values
+
+    def log_info(self, args):
+        message = Template(self.log_format)
+        logging.info(message.safe_substitute(args))
+
+    def do_POST(self):
+        status = 200
+        content = bytes(self.response, 'UTF-8')
+        values = {
+            'remote_addr': self.address_string(),
+            'time_local': self.log_date_time_string(),
+            'request': self.requestline,
+            'status': status,
+            'bytes_sent': len(content),
+            'content-type': 'text/plain',

[Vasily Kuznetsov, 2017/08/07 20:46:01]

Some other variables, like 'time_local' and 'bytes_sent' use underscores and
here you use dashes. It's a bit inconsistent and could be surprising for the
person who configures the log format. Not a deal-breaker for me, but perhaps you
would want them to be consistent.

[f.lopez, 2017/08/08 02:48:17]

Done.

+            'content-length': len(content),
+        }
+        values.update(self.get_header_values())
+        self.log_info(values)
+        self.send_response(status)
+        self.send_header('Content-Type', values['content-type'])
+        self.send_header('Content-Length', values['content-length'])
+        self.end_headers()
+        self.wfile.write(content)
+        self.log_request(200)
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--port', action='store',
+                        default=8000, type=int,
+                        nargs='?',
+                        help='Port to use [default: 8000]')
+    parser.add_argument('--response', action='store',
+                        type=str, nargs='?', default='OK',
+                        help='The response send to the client')
+    parser.add_argument('--log_format', action='store',
+                        type=str, nargs='?',
+                        default='$remote_addr - - [$time_local] "$request" $status $bytes_sent',

[Vasily Kuznetsov, 2017/08/07 20:46:01]

This line is too long now, PEP8 (and our style guide) says lines should be <80
characters. Perhaps you can make a constant for the default log format to avoid
wrapping lines too much here.

[f.lopez, 2017/08/08 02:48:17]

Done.

+                        help='Format of the log ouput')
+    parser.add_argument('log_file', action='store',
+                        type=str, nargs='?',
+                        help='The file where the logs will be written')
+    args = parser.parse_args()
+    handler_class = Handler
+    server_class = HTTPServer
+    setattr(handler_class, 'log_format', args.log_format)
+    setattr(handler_class, 'response', args.response)
+    server_address = ('', args.port)
+    httpd = server_class(server_address, handler_class)
+    if args.log_file == None:
+        logging.basicConfig(stream=sys.stdout, level=logging.INFO)
+    else:
+        logging.basicConfig(filename=args.log_file, level=logging.INFO)
+    httpd.serve_forever()