xml-to-har.py

#!/usr/bin/env python
"""
Converts Internet Explorer 'capture network traffic' XML to a HAR file.

Turns out that XML is just a HAR file anyways, but in XML form. So this
just converts it to JSON, and Bob's your uncle.

Requires Python 2.7+ and LXML.
"""
from __future__ import unicode_literals

import argparse
import json
from lxml import objectify
import sys


if sys.version_info > (3,):
    str_type = str
else:
    str_type = unicode


list_things = {
    'pages',
    'entries',
    'cookies',
    'queryString',
    'headers',
}


def xml_to_dict(element):
    if element.tag in list_things:
        return [xml_to_dict(e) for e in element.getchildren()]
    else:
        if element.getchildren():
            return {e.tag: xml_to_dict(e) for e in element.getchildren()}
        else:
            return str_type(element.pyval)


def main():
    parser = argparse.ArgumentParser(description="Convert IE's crazy XML-HAR into a real HAR file")
    parser.add_argument('infile', type=argparse.FileType('r'), default=sys.stdin)
    parser.add_argument('outfile', type=argparse.FileType('w'), default=sys.stdout)
    args = parser.parse_args()

    tree = objectify.parse(args.infile)
    root = tree.getroot()
    d = {root.tag: xml_to_dict(root)}
    json.dump(d, args.outfile, indent=2, sort_keys=True)


if __name__ == '__main__':
    main()

Thanks for this. As Internet Explorer 11 does not export to .har, this script was very useful

This is fantastic, thank you very much.

This just saved my bacon. Thanks!

YES, thanks alot! The other alternatives where getting Fiddler to work on linux or get a windows VM....

For anyone struggling with file encodings on the Windows (MSYSGIT) command line like me, I created a fork that forces UTF-8 when reading and writing the files. This small fix cost me almost three hours today since I was puzzled why lxml or an extra open() would ignore my encoding (unless I specify 'ascii'). Turns out argparse has a bit more magic in it than I thought.

Coming from php; had to do this to the json in order for it to be validated in http://www.softwareishard.com/har/viewer/ Source xml came from IE11.

$contents = file_get_contents('NetworkData.har');
$json = json_decode($contents, TRUE);
foreach ($json['log']['entries'] as $key => &$values) {
  $values['time'] = (int) $values['time'];
  $values['timings']['receive'] = (int) $values['timings']['receive'];
  $values['timings']['send'] = (int) $values['timings']['send'];
  $values['timings']['wait'] = (int) $values['timings']['wait'];
  if (!isset($values['response']['redirectURL'])) {
    $values['response']['redirectURL'] = '';
  }
  if (!isset($values['cache'])) {
    $values['cache'] = array();
  }
}
$output = json_encode($json, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_AMP | JSON_HEX_QUOT | JSON_PRETTY_PRINT);
file_put_contents('NetworkData2.har', $output);

Does it work in Python 3, or only in 2.7?

Thanks a lot for this handy tool, much appreciated!

No Bob is not my uncle :P

I want to record chrome session in HAR and playback it in IE. Is there an option?

So glad I landed here, it's very useful :D Thank you so much!