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Exception-catching middleware that allows interactive debugging.
This middleware catches all unexpected exceptions. A normal
traceback, like produced by
``paste.exceptions.errormiddleware.ErrorMiddleware`` is given, plus
controls to see local variables and evaluate expressions in a local
context.
This can only be used in single-process environments, because
subsequent requests must go back to the same process that the
exception originally occurred in. Threaded or non-concurrent
environments both work.
This shouldn't be used in production in any way. That would just be
silly.
If calling from an XMLHttpRequest call, if the GET variable ``_`` is
given then it will make the response more compact (and less
Javascripty), since if you use innerHTML it'll kill your browser. You
can look for the header X-Debug-URL in your 500 responses if you want
to see the full debuggable traceback. Also, this URL is printed to
``wsgi.errors``, so you can open it up in another browser window.
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Escape HTML characters, plus translate None to ''
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Quote a value for HTML, preserving whitespace (translating
newlines to ``
`` and multiple spaces to use `` ``).
If ``quote`` is true, then the value will be HTML quoted first.
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A simple middleware that catches errors and turns them into simple
tracebacks.
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Turns a function or method into a WSGI application.
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A decorator (meant to be used under ``wsgiapp()``) that resolves
the ``debugcount`` variable to a ``DebugInfo`` object (or gives an
error if it can't be found).
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