8 from optparse import OptionParser
9 from sfatables import commands
10 from sfatables.globals import *
11 from sfatables.commands.List import *
12 from sfatables.xmlrule import *
15 def __init__(self, chain_name):
16 self.active_context = {}
17 self.contexts = None # placeholder for rspec_manger
18 self.sorted_rule_list = []
19 self.final_processor = '__sfatables_wrap_up__.xsl'
20 chain_dir_path = os.path.join(sfatables_config,chain_name)
21 rule_list = List().get_rule_list(chain_dir_path)
22 for rule_number in rule_list:
23 self.sorted_rule_list = self.sorted_rule_list + [XMLRule(chain_name, rule_number)]
26 def wrap_up(self, doc):
27 filepath = os.path.join(sfatables_config, 'processors', self.final_processor)
29 if not os.path.exists(filepath):
30 raise Exception('Could not find final rule filter')
32 styledoc = libxml2.parseFile(filepath)
33 style = libxslt.parseStylesheetDoc(styledoc)
34 result = style.applyStylesheet(doc, None)
35 stylesheet_result = style.saveResultToString(result)
36 style.freeStylesheet()
40 return stylesheet_result
42 def set_context(self, request_context):
43 self.active_context = request_context
46 def create_xml_node(self, name, context_dict):
47 node = libxml2.newNode(name)
48 for k in context_dict.keys():
49 if (type(context_dict[k])==dict):
50 childNode = self.create_xml_node(k, context_dict[k])
51 node.addChild(childNode)
53 childNode = libxml2.newNode(k)
54 childNode.addContent(context_dict[k])
55 node.addChild(childNode)
58 def add_request_context_to_rspec(self, doc):
59 p = doc.xpathNewContext()
60 context = p.xpathEval("//RSpec")
62 raise Exception('Request is not an rspec')
64 # Add the request context
65 requestNode = self.create_xml_node('request-context',self.active_context)
66 context[0].addChild(requestNode)
71 def apply(self, rspec):
72 if (self.sorted_rule_list):
73 doc = libxml2.parseDoc(rspec)
74 doc = self.add_request_context_to_rspec(doc)
76 intermediate_rspec = doc
78 for rule in self.sorted_rule_list:
79 (matched,intermediate_rspec) = rule.apply_interpreted(intermediate_rspec)
80 if (rule.terminal and matched):
83 final_rspec = self.wrap_up(intermediate_rspec)
89 def print_rules(self):
90 for rule in self.sorted_rule_list:
94 incoming = SFATablesRules('INCOMING')
95 incoming.set_context({'sfa':{'user':{'hrn':'plc.princeton.sapanb'}}})
97 outgoing = SFATablesRules('OUTGOING')
98 print "%d rules loaded for INCOMING chain"%len(incoming.sorted_rule_list)
99 incoming.print_rules()
101 print "%d rules loaded for OUTGOING chain"%len(outgoing.sorted_rule_list)
102 outgoing.print_rules()
104 rspec = open(sys.argv[1]).read()
105 newrspec = incoming.apply(rspec)
109 if __name__=="__main__":