Scripts to download files from google storage based on sha1 sums

third_party/gsutil/gslib/commands/getcors.py

+# Copyright 2012 Google Inc.
+#
+# 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.
+
+from gslib.command import Command
+from gslib.command import COMMAND_NAME
+from gslib.command import COMMAND_NAME_ALIASES
+from gslib.command import CONFIG_REQUIRED
+from gslib.command import FILE_URIS_OK
+from gslib.command import MAX_ARGS
+from gslib.command import MIN_ARGS
+from gslib.command import PROVIDER_URIS_OK
+from gslib.command import SUPPORTED_SUB_ARGS
+from gslib.command import URIS_START_ARG
+from gslib.exception import CommandException
+from gslib.help_provider import HELP_NAME
+from gslib.help_provider import HELP_NAME_ALIASES
+from gslib.help_provider import HELP_ONE_LINE_SUMMARY
+from gslib.help_provider import HELP_TEXT
+from gslib.help_provider import HelpType
+from gslib.help_provider import HELP_TYPE
+import xml
+
+_detailed_help_text = ("""
+<B>SYNOPSIS</B>
+  gsutil getcors uri
+
+
+<B>DESCRIPTION</B>
+  Gets the Cross-Origin Resource Sharing (CORS) configuration for a given
+  bucket. This command is supported for buckets only, not objects and you
+  can get the CORS settings for only one bucket at a time. The output from
+  getcors can be redirected into a file, edited and then updated via the
+  setcors sub-command. The CORS configuration is expressed by an XML document
+  with the following structure:
+
+  <?xml version="1.0" ?>
+  <CorsConfig>
+      <Cors>
+          <Origins>
+              <Origin>origin1.example.com</Origin>
+          </Origins>
+          <Methods>
+              <Method>GET</Method>
+          </Methods>
+          <ResponseHeaders>
+              <ResponseHeader>Content-Type</ResponseHeader>
+          </ResponseHeaders>
+      </Cors>
+  </CorsConfig>
+
+  For more info about CORS, see http://www.w3.org/TR/cors/.
+""")
+
+class GetCorsCommand(Command):
+  """Implementation of gsutil getcors command."""
+
+  # Command specification (processed by parent class).
+  command_spec = {
+    # Name of command.
+    COMMAND_NAME : 'getcors',
+    # List of command name aliases.
+    COMMAND_NAME_ALIASES : [],
+    # Min number of args required by this command.
+    MIN_ARGS : 1,
+    # Max number of args required by this command, or NO_MAX.
+    MAX_ARGS : 1,
+    # Getopt-style string specifying acceptable sub args.
+    SUPPORTED_SUB_ARGS : '',
+    # True if file URIs acceptable for this command.
+    FILE_URIS_OK : False,
+    # True if provider-only URIs acceptable for this command.
+    PROVIDER_URIS_OK : False,
+    # Index in args of first URI arg.
+    URIS_START_ARG : 0,
+    # True if must configure gsutil before running command.
+    CONFIG_REQUIRED : True,
+  }
+  help_spec = {
+    # Name of command or auxiliary help info for which this help applies.
+    HELP_NAME : 'getcors',
+    # List of help name aliases.
+    HELP_NAME_ALIASES : [],
+    # Type of help)
+    HELP_TYPE : HelpType.COMMAND_HELP,
+    # One line summary of this help.
+    HELP_ONE_LINE_SUMMARY : 'Get a bucket\'s CORS XML document',
+    # The full help text.
+    HELP_TEXT : _detailed_help_text,
+  }
+
+  # Command entry point.
+  def RunCommand(self):
+    # Wildcarding is allowed but must resolve to just one bucket.
+    uris = list(self.WildcardIterator(self.args[0]).IterUris())
+    if len(uris) == 0:
+      raise CommandException('No URIs matched')
+    if len(uris) != 1:
+      raise CommandException('%s matched more than one URI, which is not\n'
+          'allowed by the %s command' % (self.args[0], self.command_name))
+    uri = uris[0]
+    if not uri.names_bucket():
+      raise CommandException('"%s" command must specify a bucket' %
+                             self.command_name)
+    cors = uri.get_cors(False, self.headers)
+    # Pretty-print the XML to make it more easily human editable.
+    parsed_xml = xml.dom.minidom.parseString(cors.to_xml().encode('utf-8'))
+    print parsed_xml.toprettyxml(indent='    ')
+    return 0