6 from optparse import OptionParser
10 from sfatables import commands
11 from sfatables.globals import *
12 from sfatables.commands.List import *
13 from sfatables.xmlrule import *
16 def __init__(self, chain_name):
17 self.active_context = {}
18 self.contexts = None # placeholder for rspec_manger
19 self.sorted_rule_list = []
20 self.final_processor = '__sfatables_wrap_up__.xsl'
21 chain_dir_path = os.path.join(sfatables_config,chain_name)
22 rule_list = List().get_rule_list(chain_dir_path)
23 for rule_number in rule_list:
24 self.sorted_rule_list = self.sorted_rule_list + [XMLRule(chain_name, rule_number)]
27 def wrap_up(self, doc):
28 filepath = os.path.join(sfatables_config, 'processors', self.final_processor)
30 if not os.path.exists(filepath):
31 raise Exception('Could not find final rule filter')
33 styledoc = libxml2.parseFile(filepath)
34 style = libxslt.parseStylesheetDoc(styledoc)
35 result = style.applyStylesheet(doc, None)
36 stylesheet_result = style.saveResultToString(result)
37 style.freeStylesheet()
41 return stylesheet_result
43 def set_context(self, request_context):
44 self.active_context = request_context
47 def create_xml_node(self, name, context_dict):
48 node = libxml2.newNode(name)
49 for k in context_dict.keys():
50 if (type(context_dict[k])==dict):
51 childNode = self.create_xml_node(k, context_dict[k])
52 node.addChild(childNode)
54 childNode = libxml2.newNode(k)
55 childNode.addContent(context_dict[k])
56 node.addChild(childNode)
59 def add_request_context_to_rspec(self, doc):
60 p = doc.xpathNewContext()
61 context = p.xpathEval("//RSpec")
63 raise Exception('Request is not an rspec')
65 # Add the request context
66 requestNode = self.create_xml_node('request-context',self.active_context)
67 context[0].addChild(requestNode)
72 def apply(self, rspec):
73 if (self.sorted_rule_list):
74 doc = libxml2.parseDoc(rspec)
75 doc = self.add_request_context_to_rspec(doc)
77 intermediate_rspec = doc
79 for rule in self.sorted_rule_list:
80 (matched,intermediate_rspec) = rule.apply_interpreted(intermediate_rspec)
81 if (rule.terminal and matched):
84 final_rspec = self.wrap_up(intermediate_rspec)
90 def print_rules(self):
91 for rule in self.sorted_rule_list:
95 incoming = SFATablesRules('INCOMING')
96 incoming.set_context({'sfa':{'user':{'hrn':'plc.princeton.sapanb'}}})
98 outgoing = SFATablesRules('OUTGOING')
99 print "%d rules loaded for INCOMING chain"%len(incoming.sorted_rule_list)
100 incoming.print_rules()
102 print "%d rules loaded for OUTGOING chain"%len(outgoing.sorted_rule_list)
103 outgoing.print_rules()
105 rspec = open(sys.argv[1]).read()
106 newrspec = incoming.apply(rspec)
110 if __name__=="__main__":