3 from __future__ import print_function
5 from datetime import datetime, timedelta
7 from sfa.util.xml import XML, XpathFilter
8 from sfa.util.faults import InvalidRSpecElement, InvalidRSpec
9 from sfa.util.sfatime import SFATIME_FORMAT
11 from sfa.rspecs.rspec_elements import RSpecElement, RSpecElements
12 from sfa.rspecs.version_manager import VersionManager
17 def __init__(self, rspec="", version=None, user_options=None, ttl=None, expires=None):
18 if user_options is None:
20 self.header = '<?xml version="1.0"?>\n'
21 self.template = """<RSpec></RSpec>"""
24 self.version_manager = VersionManager()
25 self.user_options = user_options
27 self.expires = expires
31 self.version = self.version_manager.get_version(version)
32 self.parse_xml(rspec, version)
36 self.create(version, ttl, expires)
39 "No RSpec or version specified. Must specify a valid rspec string or a valid version")
41 def create(self, version=None, ttl=None, expires=None):
44 ttl: time to live in minutes, this will determine the expires tag of the RSpec
46 self.version = self.version_manager.get_version(version)
47 self.namespaces = self.version.namespaces
48 self.parse_xml(self.version.template, self.version)
49 now = datetime.utcnow()
50 generated_ts = now.strftime(SFATIME_FORMAT)
54 expires_ts = (now + timedelta(minutes=ttl)
55 ).strftime(SFATIME_FORMAT)
57 if isinstance(expires, int):
58 expires_date = datetime.fromtimestamp(expires)
60 expires_date = expires
61 expires_ts = expires_date.strftime(SFATIME_FORMAT)
62 self.xml.set('expires', expires_ts)
63 self.xml.set('generated', generated_ts)
65 def parse_xml(self, xml, version=None):
66 self.xml.parse_xml(xml)
69 self.version = self.version_manager.get_version_by_schema(
72 #raise InvalidRSpec('unknown rspec schema: {}'.format(schema))
73 # TODO: Should start raising an exception once SFA defines a schema.
74 # for now we just default to sfa
75 self.version = self.version_manager.get_version(
76 {'type': 'sfa', 'version': '1'})
77 self.version.xml = self.xml
78 self.namespaces = self.xml.namespaces
80 def load_rspec_elements(self, rspec_elements):
82 for rspec_element in rspec_elements:
83 if isinstance(rspec_element, RSpecElement):
84 self.elements[rspec_element.type] = rspec_element
86 def register_rspec_element(self, element_type, element_name, element_path):
87 if element_type not in RSpecElements:
88 raise InvalidRSpecElement(element_type,
89 extra="no such element type: {}. Must specify a valid RSpecElement".format(element_type))
90 self.elements[element_type] = RSpecElement(
91 element_type, element_name, element_path)
93 def get_rspec_element(self, element_type):
94 if element_type not in self.elements:
95 msg = "ElementType {} not registered for this rspec".format(
97 raise InvalidRSpecElement(element_type, extra=msg)
98 return self.elements[element_type]
100 def get(self, element_type, filter=None, depth=0):
103 elements = self.get_elements(element_type, filter)
104 elements = [self.xml.get_element_attributes(
105 elem, depth=depth) for elem in elements]
108 def get_elements(self, element_type, filter=None):
110 search for a registered element
114 if element_type not in self.elements:
115 msg = "Unable to search for element {} in rspec, expath expression not found."\
116 .format(element_type)
117 raise InvalidRSpecElement(element_type, extra=msg)
118 rspec_element = self.get_rspec_element(element_type)
119 xpath = rspec_element.path + XpathFilter.xpath(filter)
120 return self.xml.xpath(xpath)
122 def merge(self, in_rspec):
123 self.version.merge(in_rspec)
125 def filter(self, filter):
126 if 'component_manager_id' in filter:
127 nodes = self.version.get_nodes()
129 if 'component_manager_id' not in node.attrib or \
130 node.attrib['component_manager_id'] != filter['component_manager_id']:
131 parent = node.getparent()
132 parent.remove(node.element)
134 def toxml(self, header=True):
136 return self.header + self.xml.toxml()
138 return self.xml.toxml()
140 def save(self, filename):
141 return self.xml.save(filename)
143 if __name__ == '__main__':
146 with open(input) as f:
147 rspec = RSpec(f.read())
149 # rspec.register_rspec_element(RSpecElements.NETWORK, 'network', '//network')
150 # rspec.register_rspec_element(RSpecElements.NODE, 'node', '//node')
151 # print rspec.get(RSpecElements.NODE)[0]
152 # print rspec.get(RSpecElements.NODE, depth=1)[0]