import sys
import os
-import pdb
+
import libxml2
+import libxslt
-from optparse import OptionParser
-from sfatables import commands, matches, targets
-from sfatables.globals import *
-from sfatables.commands.List import *
-from sfatables.xmlrule import *
+from sfatables.globals import sfatables_config
+from sfatables.commands.List import List
+from sfatables.xmlrule import XMLRule
class SFATablesRules:
def __init__(self, chain_name):
+ self.active_context = {}
+ self.contexts = None # placeholder for rspec_manger
self.sorted_rule_list = []
- chain_dir_path = "%s/%s"%(sfatables_config,chain_name)
+ 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:
+ childNode = libxml2.newNode(k)
+ childNode.addContent(context_dict[k])
+ node.addChild(childNode)
+ return node
+
+ def add_request_context_to_rspec(self, doc):
+ p = doc.xpathNewContext()
+ context = p.xpathEval("//*")
+ if not context or context[0].name not in ['RSpec', 'rspec']:
+ 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
- for rule in self.sorted_rule_list:
- intermediate_rspec = rule.apply_interpreted(intermediate_rspec)
- if (rule.terminal):
- break
+ if (self.sorted_rule_list):
+ doc = libxml2.parseDoc(rspec)
+ doc = self.add_request_context_to_rspec(doc)
+
+ intermediate_rspec = doc
+
+ for rule in self.sorted_rule_list:
+ (matched,intermediate_rspec) = rule.apply_interpreted(intermediate_rspec)
+ if (rule.terminal and matched):
+ break
+
+ final_rspec = self.wrap_up(intermediate_rspec)
+ else:
+ final_rspec = rspec
- final_rspec = XMLRule().wrap_up(intermediate_rspec)
return final_rspec
+ def print_rules(self):
+ for rule in self.sorted_rule_list:
+ print rule.processors
+
def main():
incoming = SFATablesRules('INCOMING')
- outgoing = SFATablesRules('OUTGOING')
+ incoming.set_context({'sfa':{'user':{'hrn':'plc.princeton.sapanb'}}})
- rspec = open(sys.argv[1]).read()
+ outgoing = SFATablesRules('OUTGOING')
+ print "%d rules loaded for INCOMING chain"%len(incoming.sorted_rule_list)
+ incoming.print_rules()
- print "%d rules loaded for INCOMING chain\n"%len(incoming.sorted_rule_list)
- print "%d rules loaded for OUTGOING chain\n"%len(outgoing.sorted_rule_list)
+ print "%d rules loaded for OUTGOING chain"%len(outgoing.sorted_rule_list)
+ outgoing.print_rules()
+ rspec = open(sys.argv[1]).read()
newrspec = incoming.apply(rspec)
print newrspec
return