Merge "vFW and vDNS support added to azure-plugin"

[multicloud/azure.git] / azure / aria / aria-extension-cloudify / src / aria / aria / parser / loading / request.py

diff --git a/azure/aria/aria-extension-cloudify/src/aria/aria/parser/loading/request.py b/azure/aria/aria-extension-cloudify/src/aria/aria/parser/loading/request.py
new file mode 100644 (file)
index 0000000..a809347
--- /dev/null
+++ b/azure/aria/aria-extension-cloudify/src/aria/aria/parser/loading/request.py
@@ -0,0 +1,88 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You 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.
+
+import os
+import tempfile
+
+from requests import Session
+from requests.exceptions import (ConnectionError, InvalidSchema)
+from cachecontrol import CacheControl
+from cachecontrol.caches import FileCache
+
+from .exceptions import LoaderException, DocumentNotFoundException
+from .loader import Loader
+
+SESSION = None
+SESSION_CACHE_PATH = os.path.join(tempfile.gettempdir(), 'aria_requests')
+
+
+class RequestLoader(Loader):
+    """
+    Base class for ARIA request-based loaders.
+
+    Extracts a document from a URI by performing a request.
+
+    Note that the "file:" schema is not supported: :class:`FileTextLoader` should
+    be used instead.
+    """
+
+    def __init__(self, context, uri, headers=None):
+        if headers is None:
+            headers = {}
+        self.context = context
+        self.uri = uri
+        self.headers = headers
+        self._response = None
+
+    def load(self):
+        pass
+
+    def open(self):
+        global SESSION
+        if SESSION is None:
+            SESSION = CacheControl(Session(), cache=FileCache(SESSION_CACHE_PATH))
+
+        try:
+            self._response = SESSION.get(self.uri, headers=self.headers)
+        except InvalidSchema as e:
+            raise DocumentNotFoundException('document not found: "%s"' % self.uri, cause=e)
+        except ConnectionError as e:
+            raise LoaderException('request connection error: "%s"' % self.uri, cause=e)
+        except Exception as e:
+            raise LoaderException('request error: "%s"' % self.uri, cause=e)
+
+        status = self._response.status_code
+        if status == 404:
+            self._response = None
+            raise DocumentNotFoundException('document not found: "%s"' % self.uri)
+        elif status != 200:
+            self._response = None
+            raise LoaderException('request error %d: "%s"' % (status, self.uri))
+
+
+class RequestTextLoader(RequestLoader):
+    """
+    ARIA request-based text loader.
+    """
+
+    def load(self):
+        if self._response is not None:
+            try:
+                if self._response.encoding is None:
+                    self._response.encoding = 'utf8'
+                return self._response.text
+            except Exception as e:
+                raise LoaderException('request error: %s' % self.uri, cause=e)
+        return None