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"""
Helper functions for framework build_application functions.
"""
from paste.util import import_string
from paste import lint
from paste import errormiddleware
from paste import configmiddleware
def apply_conf_middleware(app, conf, first_middleware=()):
"""
Applies any middleware that the configuration specifies,
returning the wrapped configuration.
If first_middleware is given, this middleware is applied most
closely to the application (before configuration middleware).
"""
all_middleware = list(first_middleware)
all_middleware.extend(conf.get('middleware', []))
for middleware in all_middleware:
# @@: Should this use plugins too?
if isinstance(middleware, (str, unicode)):
middleware = import_string.eval_import(middleware)
app = middleware(app)
if conf.get('lint', False):
app = lint.middleware(app)
return app
def apply_default_middleware(app, conf):
"""
Applies middleware that is generally always used.
"""
app = errormiddleware.ErrorMiddleware(app)
if conf.get('lint', False):
app = lint.middleware(app)
app = configmiddleware.ConfigMiddleware(app, conf)
return app
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