2 files changed, 182 insertions, 0 deletions
diff --git a/openstackclient/common/command.py b/openstackclient/common/command.py
new file mode 100644
index 00000000..c57d7876
--- /dev/null
+++ b/openstackclient/common/command.py
@@ -0,0 +1,35 @@
+# Copyright 2011 OpenStack LLC.
+# 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.
+#
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+"""
+OpenStack base command
+"""
+
+from cliff.command import Command
+
+
+class OpenStackCommand(Command):
+    """Base class for OpenStack commands
+    """
+
+    api = None
+
+    def run(self, parsed_args):
+        if not self.api:
+            return
+        else:
+            return super(OpenStackCommand, self).run(parsed_args)
diff --git a/openstackclient/common/exceptions.py b/openstackclient/common/exceptions.py
new file mode 100644
index 00000000..4b4a0fb4
--- /dev/null
+++ b/openstackclient/common/exceptions.py
@@ -0,0 +1,147 @@
+# Copyright 2012 OpenStack LLC.
+# 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.
+#
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+"""
+Exception definitions.
+"""
+
+
+class CommandError(Exception):
+    pass
+
+
+class AuthorizationFailure(Exception):
+    pass
+
+
+class NoTokenLookupException(Exception):
+    """This form of authentication does not support looking up
+       endpoints from an existing token."""
+    pass
+
+
+class EndpointNotFound(Exception):
+    """Could not find Service or Region in Service Catalog."""
+    pass
+
+
+class ClientException(Exception):
+    """
+    The base exception class for all exceptions this library raises.
+    """
+    def __init__(self, code, message=None, details=None):
+        self.code = code
+        self.message = message or self.__class__.message
+        self.details = details
+
+    def __str__(self):
+        return "%s (HTTP %s)" % (self.message, self.code)
+
+
+class BadRequest(ClientException):
+    """
+    HTTP 400 - Bad request: you sent some malformed data.
+    """
+    http_status = 400
+    message = "Bad request"
+
+
+class Unauthorized(ClientException):
+    """
+    HTTP 401 - Unauthorized: bad credentials.
+    """
+    http_status = 401
+    message = "Unauthorized"
+
+
+class Forbidden(ClientException):
+    """
+    HTTP 403 - Forbidden: your credentials don't give you access to this
+    resource.
+    """
+    http_status = 403
+    message = "Forbidden"
+
+
+class NotFound(ClientException):
+    """
+    HTTP 404 - Not found
+    """
+    http_status = 404
+    message = "Not found"
+
+
+class Conflict(ClientException):
+    """
+    HTTP 409 - Conflict
+    """
+    http_status = 409
+    message = "Conflict"
+
+
+class OverLimit(ClientException):
+    """
+    HTTP 413 - Over limit: you're over the API limits for this time period.
+    """
+    http_status = 413
+    message = "Over limit"
+
+
+# NotImplemented is a python keyword.
+class HTTPNotImplemented(ClientException):
+    """
+    HTTP 501 - Not Implemented: the server does not support this operation.
+    """
+    http_status = 501
+    message = "Not Implemented"
+
+
+# In Python 2.4 Exception is old-style and thus doesn't have a __subclasses__()
+# so we can do this:
+#     _code_map = dict((c.http_status, c)
+#                      for c in ClientException.__subclasses__())
+#
+# Instead, we have to hardcode it:
+_code_map = dict((c.http_status, c) for c in [BadRequest, Unauthorized,
+                   Forbidden, NotFound, OverLimit, HTTPNotImplemented])
+
+
+def from_response(response, body):
+    """
+    Return an instance of an ClientException or subclass
+    based on an httplib2 response.
+
+    Usage::
+
+        resp, body = http.request(...)
+        if resp.status != 200:
+            raise exception_from_response(resp, body)
+    """
+    cls = _code_map.get(response.status, ClientException)
+    if body:
+        if hasattr(body, 'keys'):
+            error = body[body.keys()[0]]
+            message = error.get('message', None)
+            details = error.get('details', None)
+        else:
+            # If we didn't get back a properly formed error message we
+            # probably couldn't communicate with Keystone at all.
+            message = "Unable to communicate with image service: %s." % body
+            details = None
+        return cls(code=response.status, message=message, details=details)
+    else:
+        return cls(code=response.status)