refactor

radicale/app/delete.py

@@ -0,0 +1,70 @@
+# This file is part of Radicale Server - Calendar Server
+# Copyright © 2008 Nicolas Kandel
+# Copyright © 2008 Pascal Halter
+# Copyright © 2008-2017 Guillaume Ayoub
+# Copyright © 2017-2018 Unrud <unrud@outlook.com>
+#
+# This library is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Radicale.  If not, see <http://www.gnu.org/licenses/>.
+
+from http import client
+from xml.etree import ElementTree as ET
+
+from radicale import httputils, storage, xmlutils
+
+
+def xml_delete(base_prefix, path, collection, href=None):
+    """Read and answer DELETE requests.
+
+    Read rfc4918-9.6 for info.
+
+    """
+    collection.delete(href)
+
+    multistatus = ET.Element(xmlutils.make_tag("D", "multistatus"))
+    response = ET.Element(xmlutils.make_tag("D", "response"))
+    multistatus.append(response)
+
+    href = ET.Element(xmlutils.make_tag("D", "href"))
+    href.text = xmlutils.make_href(base_prefix, path)
+    response.append(href)
+
+    status = ET.Element(xmlutils.make_tag("D", "status"))
+    status.text = xmlutils.make_response(200)
+    response.append(status)
+
+    return multistatus
+
+
+class ApplicationDeleteMixin:
+    def do_DELETE(self, environ, base_prefix, path, user):
+        """Manage DELETE request."""
+        if not self.access(user, path, "w"):
+            return httputils.NOT_ALLOWED
+        with self.Collection.acquire_lock("w", user):
+            item = next(self.Collection.discover(path), None)
+            if not item:
+                return httputils.NOT_FOUND
+            if not self.access(user, path, "w", item):
+                return httputils.NOT_ALLOWED
+            if_match = environ.get("HTTP_IF_MATCH", "*")
+            if if_match not in ("*", item.etag):
+                # ETag precondition not verified, do not delete item
+                return httputils.PRECONDITION_FAILED
+            if isinstance(item, storage.BaseCollection):
+                xml_answer = xml_delete(base_prefix, path, item)
+            else:
+                xml_answer = xml_delete(
+                    base_prefix, path, item.collection, item.href)
+            headers = {"Content-Type": "text/xml; charset=%s" % self.encoding}
+            return client.OK, headers, self.write_xml_content(xml_answer)