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Last active February 25, 2021 17:22
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#!/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
str_type = unicode
list_things = {
def xml_to_dict(element):
if element.tag in list_things:
return [xml_to_dict(e) for e in element.getchildren()]
if element.getchildren():
return {e.tag: xml_to_dict(e) for e in element.getchildren()}
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__':
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YES, thanks alot! The other alternatives where getting Fiddler to work on linux or get a windows VM....

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fbender commented Aug 18, 2017

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.

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Coming from php; had to do this to the json in order for it to be validated in 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();
file_put_contents('NetworkData2.har', $output);

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

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Thanks a lot for this handy tool, much appreciated!

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mohitt commented May 9, 2019

No Bob is not my uncle :P

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giriva commented Sep 25, 2019

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

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nimiiy commented Nov 13, 2020

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

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