Bug: PyWPS does not escape properly ExceptionText

test_pywps_bug.py

import unittest
import sys
sys.path.append("./pywps-svn")
import pywps
import pywps.config
pywps.config.loadConfiguration('tests/pywps-no-logging.cfg')

class TestWps(unittest.TestCase):
    def test_what_happen_on_process_errors(self):
        wps = pywps.Pywps(pywps.METHOD_GET)
        wps.parseRequest(execute_of('proc_name'))

        response = wps.performRequest(
                processes=a_failing_process(
                    name='proc_name', 
                    exception_message='<<to-be-escaped>>'))

        exception_text = extract_exception_text(response)
        self.assertEquals(
            'Failed to execute WPS process [proc_name]: <<to-be-escaped>>', 
            exception_text)
        self.assertNotEquals(
            'Failed to execute WPS process [proc_name]: &lt;&lt;to-be-escaped&gt;&gt;',
            exception_text)

def extract_exception_text(response):
    import re
    pattern=re.compile('<ows:ExceptionText>(.*)</ows:ExceptionText>')
    if pattern.search(response):
        exception_text = pattern.search(response).group(1)
        return exception_text
    else:
        assert False, "ExceptionText not found in response:\n%s" % response

def execute_of(process):
    return ('service=WPS'
            '&version=1.0.0'
            '&request=Execute'
            '&identifier=%s' % process)

from pywps.Process import WPSProcess
def a_failing_process(name,exception_message):
    class Process(WPSProcess):
        def execute(self):
            raise RuntimeError(exception_message)
    return [Process(name)]