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📁 auth
📄 cascade.py(4.4 KB)
📄 cascade.pyc(4.37 KB)
📄 cascade.pyo(4.37 KB)
📄 cgiapp.py(9.37 KB)
📄 cgiapp.pyc(8.35 KB)
📄 cgiapp.pyo(8.14 KB)
📄 cgitb_catcher.py(3.66 KB)
📄 cgitb_catcher.pyc(3.76 KB)
📄 cgitb_catcher.pyo(3.76 KB)
📄 config.py(4.21 KB)
📄 config.pyc(5.16 KB)
📄 config.pyo(5.16 KB)
📁 cowbell
📁 debug
📄 errordocument.py(13.45 KB)
📄 errordocument.pyc(12.77 KB)
📄 errordocument.pyo(12.77 KB)
📁 evalexception
📁 exceptions
📄 fileapp.py(13.29 KB)
📄 fileapp.pyc(13.04 KB)
📄 fileapp.pyo(12.91 KB)
📄 fixture.py(56.63 KB)
📄 fixture.py.stdlib(56.71 KB)
📄 fixture.pyc(59.3 KB)
📄 fixture.pyo(57.08 KB)
📄 flup_session.py(3.85 KB)
📄 flup_session.pyc(3.87 KB)
📄 flup_session.pyo(3.87 KB)
📄 gzipper.py(3.61 KB)
📄 gzipper.pyc(4.47 KB)
📄 gzipper.pyo(4.47 KB)
📄 httpexceptions.py(23.65 KB)
📄 httpexceptions.pyc(27.71 KB)
📄 httpexceptions.pyo(26.98 KB)
📄 httpheaders.py(42.08 KB)
📄 httpheaders.pyc(44.21 KB)
📄 httpheaders.pyo(42.94 KB)
📄 httpserver.py(54.36 KB)
📄 httpserver.pyc(47.52 KB)
📄 httpserver.pyo(46.87 KB)
📄 lint.py(14.65 KB)
📄 lint.pyc(17.47 KB)
📄 lint.pyo(13.45 KB)
📄 modpython.py(7.79 KB)
📄 modpython.pyc(8.74 KB)
📄 modpython.pyo(8.74 KB)
📄 pony.py(2.23 KB)
📄 pony.pyc(2.69 KB)
📄 pony.pyo(2.69 KB)
📄 progress.py(7.97 KB)
📄 progress.pyc(9.2 KB)
📄 progress.pyo(9.2 KB)
📄 proxy.py(9.94 KB)
📄 proxy.pyc(8.58 KB)
📄 proxy.pyo(8.58 KB)
📄 recursive.py(14.32 KB)
📄 recursive.pyc(17.72 KB)
📄 recursive.pyo(17.4 KB)
📄 registry.py(21.67 KB)
📄 registry.pyc(22.4 KB)
📄 registry.pyo(22.4 KB)
📄 reloader.py(5.87 KB)
📄 reloader.pyc(5.99 KB)
📄 reloader.pyo(5.99 KB)
📄 request.py(13.81 KB)
📄 request.pyc(13.74 KB)
📄 request.pyo(13.64 KB)
📄 response.py(7.48 KB)
📄 response.pyc(9.25 KB)
📄 response.pyo(9.16 KB)
📄 session.py(11.07 KB)
📄 session.pyc(11.77 KB)
📄 session.pyo(11.77 KB)
📄 transaction.py(4.26 KB)
📄 transaction.pyc(5.72 KB)
📄 transaction.pyo(5.72 KB)
📄 translogger.py(4.7 KB)
📄 translogger.pyc(4.27 KB)
📄 translogger.pyo(4.27 KB)
📄 url.py(14.28 KB)
📄 url.pyc(18.15 KB)
📄 url.pyo(18.15 KB)
📄 urlmap.py(8.82 KB)
📄 urlmap.pyc(9.54 KB)
📄 urlmap.pyo(9.4 KB)
📄 urlparser.py(25.8 KB)
📄 urlparser.pyc(22.14 KB)
📄 urlparser.pyo(21.97 KB)
📁 util
📄 wsgilib.py(19.66 KB)
📄 wsgilib.pyc(21.71 KB)
📄 wsgilib.pyo(21.66 KB)
📄 wsgiwrappers.py(21.65 KB)
📄 wsgiwrappers.pyc(23.88 KB)
📄 wsgiwrappers.pyo(23.88 KB)

Editing: transaction.py

# (c) 2005 Ian Bicking and contributors; written for Paste (http://pythonpaste.org)
# Licensed under the MIT license: http://www.opensource.org/licenses/mit-license.php
# (c) 2005 Clark C. Evans
# This module is part of the Python Paste Project and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
"""
Middleware related to transactions and database connections.

At this time it is very basic; but will eventually sprout all that
two-phase commit goodness that I don't need.

.. note::

This is experimental, and will change in the future.
"""
from paste.httpexceptions import HTTPException
from wsgilib import catch_errors

class TransactionManagerMiddleware(object):

def __init__(self, application):
        self.application = application

def __call__(self, environ, start_response):
        environ['paste.transaction_manager'] = manager = Manager()
        # This makes sure nothing else traps unexpected exceptions:
        environ['paste.throw_errors'] = True
        return catch_errors(self.application, environ, start_response,
                            error_callback=manager.error,
                            ok_callback=manager.finish)

class Manager(object):

def __init__(self):
        self.aborted = False
        self.transactions = []

def abort(self):
        self.aborted = True

def error(self, exc_info):
        self.aborted = True
        self.finish()

def finish(self):
        for trans in self.transactions:
            if self.aborted:
                trans.rollback()
            else:
                trans.commit()

class ConnectionFactory(object):
    """
    Provides a callable interface for connecting to ADBAPI databases in
    a WSGI style (using the environment).  More advanced connection
    factories might use the REMOTE_USER and/or other environment
    variables to make the connection returned depend upon the request.
    """
    def __init__(self, module, *args, **kwargs):
        #assert getattr(module,'threadsaftey',0) > 0
        self.module = module
        self.args = args
        self.kwargs = kwargs

# deal with database string quoting issues
        self.quote = lambda s: "'%s'" % s.replace("'","''")
        if hasattr(self.module,'PgQuoteString'):
            self.quote = self.module.PgQuoteString

def __call__(self, environ=None):
        conn = self.module.connect(*self.args, **self.kwargs)
        conn.__dict__['module'] = self.module
        conn.__dict__['quote'] = self.quote
        return conn

def BasicTransactionHandler(application, factory):
    """
    Provides a simple mechanism for starting a transaction based on the
    factory; and for either committing or rolling back the transaction
    depending on the result.  It checks for the response's current
    status code either through the latest call to start_response; or
    through a HTTPException's code.  If it is a 100, 200, or 300; the
    transaction is committed; otherwise it is rolled back.
    """
    def basic_transaction(environ, start_response):
        conn = factory(environ)
        environ['paste.connection'] = conn
        should_commit = [500]
        def finalizer(exc_info=None):
            if exc_info:
                if isinstance(exc_info[1], HTTPException):
                    should_commit.append(exc_info[1].code)
            if should_commit.pop() < 400:
                conn.commit()
            else:
                try:
                    conn.rollback()
                except:
                    # TODO: check if rollback has already happened
                    return
            conn.close()
        def basictrans_start_response(status, headers, exc_info = None):
            should_commit.append(int(status.split(" ")[0]))
            return start_response(status, headers, exc_info)
        return catch_errors(application, environ, basictrans_start_response,
                            finalizer, finalizer)
    return basic_transaction

__all__ = ['ConnectionFactory', 'BasicTransactionHandler']

if '__main__' == __name__ and False:
    from pyPgSQL import PgSQL
    factory = ConnectionFactory(PgSQL, database="testing")
    conn = factory()
    curr = conn.cursor()
    curr.execute("SELECT now(), %s" % conn.quote("B'n\\'gles"))
    (time, bing) = curr.fetchone()
    print bing, time

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Editing: transaction.py

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