1 files changed, 89 insertions, 0 deletions
diff --git a/mediagoblin/tools/processing.py b/mediagoblin/tools/processing.py
new file mode 100644
index 00000000..cff4cb9d
--- /dev/null
+++ b/mediagoblin/tools/processing.py
@@ -0,0 +1,89 @@
+# GNU MediaGoblin -- federated, autonomous media hosting
+# Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import logging
+import json
+import traceback
+
+from urllib2 import urlopen, Request, HTTPError
+from urllib import urlencode
+
+from mediagoblin.tools.common import TESTS_ENABLED
+
+_log = logging.getLogger(__name__)
+
+TESTS_CALLBACKS = {}
+
+
+def create_post_request(url, data, **kw):
+    '''
+    Issue a HTTP POST request.
+
+    Args:
+        url: The URL to which the POST request should be issued
+        data: The data to be send in the body of the request
+        **kw:
+        data_parser: The parser function that is used to parse the `data`
+            argument
+    '''
+    data_parser = kw.get('data_parser', urlencode)
+    headers = kw.get('headers', {})
+
+    return Request(url, data_parser(data), headers=headers)
+
+
+def json_processing_callback(entry):
+    '''
+    Send an HTTP post to the registered callback url, if any.
+    '''
+    if not entry.processing_metadata:
+        _log.debug('No processing callback for {0}'.format(entry))
+        return
+
+    url = entry.processing_metadata[0].callback_url
+
+    _log.debug('Sending processing callback for {0} ({1})'.format(
+        entry,
+        url))
+
+    headers = {
+            'Content-Type': 'application/json'}
+
+    data = {
+            'id': entry.id,
+            'state': entry.state}
+
+    # Trigger testing mode, no callback will be sent
+    if url.endswith('secrettestmediagoblinparam'):
+        TESTS_CALLBACKS.update({url: data})
+        return True
+
+    request = create_post_request(
+            url,
+            data,
+            headers=headers,
+            data_parser=json.dumps)
+
+    try:
+        urlopen(request)
+        _log.debug('Processing callback for {0} sent'.format(entry))
+
+        return True
+    except HTTPError:
+        _log.error('Failed to send callback: {0}'.format(
+            traceback.format_exc()))
+
+        return False