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Convert Javascript code to an XML document
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dangra Merge pull request #30 from immerrr/fix-unicode-surrogate-pairs
Fix unicode surrogate pair handling
Latest commit d01b79e Dec 22, 2017


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Convert Javascript code to an XML document.

This makes it easy to extract data embedded in JavaScript code using XPath in a way more robust than just using regular expressions.


You can install js2xml via PyPI:

pip install js2xml


>>> import js2xml
>>> jscode = """function factorial(n) {
...     if (n === 0) {
...         return 1;
...     }
...     return n * factorial(n - 1);
... }"""
>>> parsed = js2xml.parse(jscode)
>>> parsed.xpath("//funcdecl/@name")  # extracts function name
>>> print js2xml.pretty_print(parsed)  # pretty-print generated XML
  <funcdecl name="factorial">
      <identifier name="n"/>
          <binaryoperation operation="===">
              <identifier name="n"/>
              <number value="0"/>
              <number value="1"/>
        <binaryoperation operation="*">
            <identifier name="n"/>
                <identifier name="factorial"/>
                <binaryoperation operation="-">
                    <identifier name="n"/>
                    <number value="1"/>



v0.3.1 (2017-08-03)

  • Fix packaging

v0.3.0 (2017-08-03)

  • Add Python 3.6 support

  • Deprecate js2xml.jsonlike

  • Introduce js2xml.utils.objects module:

    • js2xml.utils.objects.make(node): takes a node in the js2xml-parsed tree and converts to a suitable Python object
    • js2xml.utils.objects.findall(tree, types): used to find the top-most nodes in the js2xml-parsed tree that can be converted to a dict, list, str, bool, int or float
    • js2xml.utils.objects.getall(tree, types): same as .findall() except that it converts what was found to the corresponding Python object, using js2xml.utils.objects.make()
  • Introduce js2xml.utils.vars module:

    • js2xml.utils.vars.get_vars(tree) can be used to turn a JS snippet into a python object where you can access JavaScript variables by name and get the parsed values

v0.2.3 (2017-05-30)

  • Regenerate and files with PLY 3.10
  • Properly set logger level to ERROR

v0.2.2 (2016-12-01)

  • Include and files to (hopefully) remove write permission warnings (see issue #16)
  • Run tests with tox (locally and on Travis CI)
  • Add code coverage reports (+ for Travis CI builds)
  • Run tests with Python 3.6
  • Automatic PyPI deploys from Travis CI

v0.2.1 (2016-06-10)

  • Distribute as universal wheel

v0.2.0 (2016-06-10)

  • Python 3 support (tested with 3.4 and 3.5)
  • Use logger to suppress Yacc warnings
  • require PLY > 3.6
  • Use bumpversion for versioning
  • Pretty-print output is now a Unicode string

v0.1.2 (2015-05-11)

  • Profiling scripts added
  • Updated notes with use-case, installing via pip
  • Force PLY 3.4 (3.6 has issues with slimit)

v0.1.1 (2014-08-13)

  • Fix parsing of objects with integer keys
  • Fix try/catch/finally and named function expressions
  • Add download URL in setup file (for PyPI)

v0.1 (2014-08-12)

Initial release

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