view roundup/cgi/exceptions.py @ 5356:91954be46a66

A real fix for the problem where: import random would result in every call to random() returning the same value in the web interface. While cgi/client.py:Client::__init.py__ was calling random.seed(), on most systems random was SystemRandom and not the default random. As a result the random as you would get from: import random was never being seeded. I added a function to access and seed the random bound instance of random.Random that is called during init. This fixes all three places where I saw the broken randomness. It should also fix: http://psf.upfronthosting.co.za/roundup/meta/issue644 I also removed the prior code that would bail if systemRandom was not available.
author John Rouillard <rouilj@ieee.org>
date Sun, 08 Jul 2018 11:34:42 -0400
parents 32f95ec6bd8e
children 07abc8d36940
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"""Exceptions for use in Roundup's web interface.
"""

__docformat__ = 'restructuredtext'

from roundup.exceptions import LoginError, Unauthorised
import cgi

class HTTPException(BaseException):
    pass

class Redirect(HTTPException):
    pass

class NotFound(HTTPException):
    pass

class NotModified(HTTPException):
    pass

class DetectorError(BaseException):
    """Raised when a detector throws an exception.
Contains details of the exception."""
    def __init__(self, subject, html, txt):
        self.subject = subject
        self.html = html
        self.txt = txt

class FormError(ValueError):
    """An 'expected' exception occurred during form parsing.

    That is, something we know can go wrong, and don't want to alarm the user
    with.

    We trap this at the user interface level and feed back a nice error to the
    user.

    """
    pass

class SendFile(BaseException):
    """Send a file from the database."""

class SendStaticFile(BaseException):
    """Send a static file from the instance html directory."""

class SeriousError(BaseException):
    """Raised when we can't reasonably display an error message on a
    templated page.

    The exception value will be displayed in the error page, HTML
    escaped.
    """
    def __str__(self):
        return """
<html><head><title>Roundup issue tracker: An error has occurred</title>
 <link rel="stylesheet" type="text/css" href="@@file/style.css">
</head>
<body class="body" marginwidth="0" marginheight="0">
 <p class="error-message">%s</p>
</body></html>
"""%cgi.escape(self.args[0])

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Roundup Issue Tracker: http://roundup-tracker.org/