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Diffstat (limited to 'oslo_middleware/debug.py')
-rw-r--r-- | oslo_middleware/debug.py | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/oslo_middleware/debug.py b/oslo_middleware/debug.py new file mode 100644 index 0000000..bdbf539 --- /dev/null +++ b/oslo_middleware/debug.py @@ -0,0 +1,60 @@ +# Copyright 2011 OpenStack Foundation. +# All Rights Reserved. +# +# Licensed under the Apache License, Version 2.0 (the "License"); you may +# not use this file except in compliance with the License. You may obtain +# a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT +# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the +# License for the specific language governing permissions and limitations +# under the License. + +"""Debug middleware""" + +from __future__ import print_function + +import sys + +import six +import webob.dec + +from oslo_middleware import base + + +class Debug(base.Middleware): + """Helper class that returns debug information. + + Can be inserted into any WSGI application chain to get information about + the request and response. + """ + + @webob.dec.wsgify + def __call__(self, req): + print(("*" * 40) + " REQUEST ENVIRON") + for key, value in req.environ.items(): + print(key, "=", value) + print() + resp = req.get_response(self.application) + + print(("*" * 40) + " RESPONSE HEADERS") + for (key, value) in six.iteritems(resp.headers): + print(key, "=", value) + print() + + resp.app_iter = self.print_generator(resp.app_iter) + + return resp + + @staticmethod + def print_generator(app_iter): + """Prints the contents of a wrapper string iterator when iterated.""" + print(("*" * 40) + " BODY") + for part in app_iter: + sys.stdout.write(part) + sys.stdout.flush() + yield part + print() |