Set up different namespaces for match and target arguments.

[sfa.git] / sfatables / runtime.py

diff --git a/sfatables/runtime.py b/sfatables/runtime.py
index 235c67f..e948d05 100644 (file)
--- a/sfatables/runtime.py
+++ b/sfatables/runtime.py
@@ -13,34 +13,84 @@ from sfatables.xmlrule import *
 
 class SFATablesRules:
     def __init__(self, chain_name):
+        self.active_context = {}
         self.contexts = None # placeholder for rspec_manger
         self.sorted_rule_list = []
+        self.final_processor = '__sfatables_wrap_up__.xsl'
         chain_dir_path = os.path.join(sfatables_config,chain_name)
         rule_list = List().get_rule_list(chain_dir_path)
         for rule_number in rule_list:
-            self.sorted_rule_list.append(XMLRule(chain_name, rule_number))
+            self.sorted_rule_list = self.sorted_rule_list + [XMLRule(chain_name, rule_number)]
         return
 
+    def wrap_up(self, doc):
+        filepath = os.path.join(sfatables_config, 'processors', self.final_processor)
+
+        if not os.path.exists(filepath):
+            raise Exception('Could not find final rule filter')
+
+        styledoc = libxml2.parseFile(filepath)
+        style = libxslt.parseStylesheetDoc(styledoc)
+        result = style.applyStylesheet(doc, None)
+        stylesheet_result = style.saveResultToString(result)
+        style.freeStylesheet()
+        doc.freeDoc()
+        result.freeDoc()
+
+        return stylesheet_result
 
     def set_context(self, request_context):
+        self.active_context = request_context
         return
 
+    def create_xml_node(self, name, context_dict):
+        node = libxml2.newNode(name)
+        for k in context_dict.keys():
+            if (type(context_dict[k])==dict):
+                childNode = self.create_xml_node(k, context_dict[k])
+                node.addChild(childNode)
+            else:
+                node.addContent(context_dict[k])
+        return node
+                
+    def add_request_context_to_rspec(self, doc):
+        p = doc.xpathNewContext()
+        context = p.xpathEval("//rspec")
+        if (not context):
+            raise Exception('Request is not an rspec')
+        else:
+            # Add the request context
+            requestNode = self.create_xml_node('request-context',self.active_context)
+            context[0].addChild(requestNode)
+        p.xpathFreeContext()
+        return doc
+
+    
     def apply(self, rspec):
-        intermediate_rspec = rspec
+        doc = libxml2.parseDoc(rspec)
+        doc = self.add_request_context_to_rspec(doc)
+
+        intermediate_rspec = doc
+
         for rule in self.sorted_rule_list:
             intermediate_rspec  = rule.apply_interpreted(intermediate_rspec)
+            intermediate_rspec = XMLRule().wrap_up(intermediate_rspec) 
             if (rule.terminal):
                 break
 
-        final_rspec = XMLRule().wrap_up(intermediate_rspec) 
+        final_rspec = self.wrap_up(intermediate_rspec) 
         return final_rspec
 
 def main():
     incoming = SFATablesRules('INCOMING')
-    outgoing = SFATablesRules('OUTGOING')
+    incoming.set_context({'sfa':{'user':{'hrn':'plc.princeton.sapanb'}}})
 
+    outgoing = SFATablesRules('OUTGOING')
     print "%d rules loaded for INCOMING chain"%len(incoming.sorted_rule_list)
+    print incoming.sorted_rule_list[0].processors
+
     print "%d rules loaded for OUTGOING chain"%len(outgoing.sorted_rule_list)
+    print outgoing.sorted_rule_list[0].processors
 
     rspec = open(sys.argv[1]).read()
     newrspec = incoming.apply(rspec)