1 files changed, 108 insertions, 0 deletions
diff --git a/extensions/cpsection/updater/backends/aslo.py b/extensions/cpsection/updater/backends/aslo.py
new file mode 100644
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+++ b/extensions/cpsection/updater/backends/aslo.py
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+#!/usr/bin/python
+# Copyright (C) 2009, Sugar Labs
+#
+# This program 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 2 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 General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+"""Activity information microformat parser.
+
+Activity information is embedded in HTML/XHTML/XML pages using a
+Resource Description Framework (RDF) http://www.w3.org/RDF/ .
+ 
+An example::
+
+<?xml version="1.0" encoding="UTF-8"?>
+<RDF:RDF xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#"><RDF:Description about="urn:mozilla:extension:bounce">
+    <em:updates>
+        <RDF:Seq>
+            <RDF:li resource="urn:mozilla:extension:bounce:7"/>
+        </RDF:Seq>
+    </em:updates>
+</RDF:Description>
+
+<RDF:Description about="urn:mozilla:extension:bounce:7">
+    <em:version>7</em:version>
+    <em:targetApplication>
+        <RDF:Description>
+            <em:id>{3ca105e0-2280-4897-99a0-c277d1b733d2}</em:id>
+            <em:minVersion>0.82</em:minVersion>
+            <em:maxVersion>0.84</em:maxVersion>
+            <em:updateLink>http://activities.sugarlabs.org/downloads/file/25986/bounce-7.xo</em:updateLink>
+            
+            <em:updateHash>sha256:816a7c43b4f1ea4769c61c03fea24842ec5fa566b7d41626ffc52ec37b37b6c5</em:updateHash>
+        </RDF:Description>
+    </em:targetApplication>
+</RDF:Description></RDF:RDF>
+"""
+
+import urllib2
+from urllib2 import HTTPError
+
+import socket
+
+from  xml.etree.ElementTree import ElementTree, XML
+
+from jarabe import config
+
+class ASLOParser():
+    """XML parser to pull out data expressed in our aslo format."""
+    
+    def __init__(self, xml_data):
+        self.elem = XML(xml_data)
+
+    def parse(self):
+        try:
+            self.version = self.elem.find(".//{http://www.mozilla.org/2004/em-rdf#}version").text
+            self.link = self.elem.find(".//{http://www.mozilla.org/2004/em-rdf#}updateLink").text
+            self.size = self.elem.find(".//{http://www.mozilla.org/2004/em-rdf#}updateSize").text
+            self.size = long(self.size) * 1024
+        except:
+            self.version = 0
+            self.link = None
+            self.size = 0
+
+def parse_aslo(xml_data):
+    """Parse the activity information embedded in the given string
+    containing XML data.  Returns a list containing the activity version and url.
+    """
+    ap = ASLOParser(xml_data)
+    ap.parse()
+    return ap.version, ap.link, ap.size
+
+def parse_url(url):
+    """Parse the activity information at the given URL. Returns the same
+    information as `parse_xml` does, and raises the same exceptions.
+    The `urlopen_args` can be any keyword arguments accepted by
+    `bitfrost.util.urlrange.urlopen`."""
+
+    response = urllib2.urlopen(url)
+    return parse_aslo(response.read())
+
+def fetch_update_info(bundle):
+    """Return a tuple of new version, url for new version.
+
+    All the information about the new version is `None` if no newer
+    update can be found.
+    """
+
+    url = 'http://activities.sugarlabs.org/services/update.php?id=' + bundle.get_bundle_id() + '&appVersion=' + config.version
+
+    return parse_url(url)
+
+#########################################################################
+# Self-test code.
+def _main():
+    """Self-test."""
+    print parse_url('http://activities.sugarlabs.org/services/update.php?id=bounce')
+
+if __name__ == '__main__': _main ()