sfa/util/config.py

   1 #!/usr/bin/python
   2 import sys
   3 import os
   4 import time
   5 import ConfigParser
   6 import tempfile
   7 import codecs
   8 from StringIO import StringIO
   9 from sfa.util.xml import XML
  10
  11 default_config = \
  12 """
  13 """
  14
  15 def isbool(v):
  16     return v.lower() in ("true", "false")
  17
  18 def str2bool(v):
  19     return v.lower() in ("true", "1")
  20
  21 class Config:
  22
  23     def __init__(self, config_file='/etc/sfa/sfa_config'):
  24         self._files = []
  25         self.config_path = os.path.dirname(config_file)
  26         self.config = ConfigParser.ConfigParser()
  27         self.filename = config_file
  28         if not os.path.isfile(self.filename):
  29             self.create(self.filename)
  30         self.load(self.filename)
  31
  32
  33     def _header(self):
  34         header = """
  35 DO NOT EDIT. This file was automatically generated at
  36 %s from:
  37
  38 %s
  39 """ % (time.asctime(), os.linesep.join(self._files))
  40
  41         # Get rid of the surrounding newlines
  42         return header.strip().split(os.linesep)
  43
  44     def create(self, filename):
  45         if not os.path.exists(os.path.dirname(filename)):
  46             os.makedirs(os.path.dirname(filename))
  47         configfile = open(filename, 'w')
  48         configfile.write(default_config)
  49         configfile.close()
  50
  51
  52     def load(self, filename):
  53         if filename:
  54             try:
  55                 self.config.read(filename)
  56             except ConfigParser.MissingSectionHeaderError:
  57                 if filename.endswith('.xml'):
  58                     self.load_xml(filename)
  59                 else:
  60                     self.load_shell(filename)
  61             self._files.append(filename)
  62             self.set_attributes()
  63
  64     def load_xml(self, filename):
  65         xml = XML(filename)
  66         categories = xml.xpath('//configuration/variables/category')
  67         for category in categories:
  68             section_name = category.get('id')
  69             if not self.config.has_section(section_name):
  70                 self.config.add_section(section_name)
  71             options = category.xpath('./variablelist/variable')
  72             for option in options:
  73                 option_name = option.get('id')
  74                 value = option.xpath('./value')[0].text
  75                 if not value:
  76                     value = ""
  77                 self.config.set(section_name, option_name, value)
  78
  79     def load_shell(self, filename):
  80         f = open(filename, 'r')
  81         for line in f:
  82             try:
  83                 if line.startswith('#'):
  84                     continue
  85                 parts = line.strip().split("=")
  86                 if len(parts) < 2:
  87                     continue
  88                 option = parts[0]
  89                 value = parts[1].replace('"', '').replace("'","")
  90                 section, var = self.locate_varname(option, strict=False)
  91                 if section and var:
  92                     self.set(section, var, value)
  93             except:
  94                 pass
  95         f.close()
  96
  97     def locate_varname(self, varname, strict=True):
  98         varname = varname.lower()
  99         sections = self.config.sections()
 100         section_name = ""
 101         var_name = ""
 102         for section in sections:
 103             if varname.startswith(section.lower()) and len(section) > len(section_name):
 104                 section_name = section.lower()
 105                 var_name = varname.replace(section_name, "")[1:]
 106         if strict and not self.config.has_option(section_name, var_name):
 107             raise ConfigParser.NoOptionError(var_name, section_name)
 108         return (section_name, var_name)
 109
 110     def set_attributes(self):
 111         sections = self.config.sections()
 112         for section in sections:
 113             for item in self.config.items(section):
 114                 name = "%s_%s" % (section, item[0])
 115                 value = item[1]
 116                 if isbool(value):
 117                     value = str2bool(value)
 118                 elif value.isdigit():
 119                     value = int(value)
 120                 setattr(self, name, value)
 121                 setattr(self, name.upper(), value)
 122
 123
 124     def verify(self, config1, config2, validate_method):
 125         return True
 126
 127     def validate_type(self, var_type, value):
 128         return True
 129
 130     @staticmethod
 131     def is_xml(config_file):
 132         try:
 133             x = Xml(config_file)
 134             return True
 135         except:
 136             return False
 137
 138     @staticmethod
 139     def is_ini(config_file):
 140         try:
 141             c = ConfigParser.ConfigParser()
 142             c.read(config_file)
 143             return True
 144         except ConfigParser.MissingSectionHeaderError:
 145             return False
 146
 147
 148     def dump(self, sections = []):
 149         sys.stdout.write(output_python())
 150
 151     def output_python(self, encoding = "utf-8"):
 152         buf = codecs.lookup(encoding)[3](StringIO())
 153         buf.writelines(["# " + line + os.linesep for line in self._header()])
 154
 155         for section in self.sections():
 156             buf.write("[%s]%s" % (section, os.linesep))
 157             for (name,value) in self.items(section):
 158                 buf.write("%s=%s%s" % (name,value,os.linesep))
 159             buf.write(os.linesep)
 160         return buf.getvalue()
 161
 162     def output_shell(self, show_comments = True, encoding = "utf-8"):
 163         """
 164         Return variables as a shell script.
 165         """
 166
 167         buf = codecs.lookup(encoding)[3](StringIO())
 168         buf.writelines(["# " + line + os.linesep for line in self._header()])
 169
 170         for section in self.sections():
 171             for (name,value) in self.items(section):
 172                 # bash does not have the concept of NULL
 173                 if value:
 174                     option = "%s_%s" % (section.upper(), name.upper())
 175                     if isbool(value):
 176                         value = str(str2bool(value))
 177                     elif not value.isdigit():
 178                         value = '"%s"' % value
 179                     buf.write(option + "=" + value + os.linesep)
 180         return buf.getvalue()
 181
 182     def output_php(selfi, encoding = "utf-8"):
 183         """
 184         Return variables as a PHP script.
 185         """
 186
 187         buf = codecs.lookup(encoding)[3](StringIO())
 188         buf.write("<?php" + os.linesep)
 189         buf.writelines(["// " + line + os.linesep for line in self._header()])
 190
 191         for section in self.sections():
 192             for (name,value) in self.items(section):
 193                 option = "%s_%s" % (section, name)
 194                 buf.write(os.linesep)
 195                 buf.write("// " + option + os.linesep)
 196                 if value is None:
 197                     value = 'NULL'
 198                 buf.write("define('%s', %s);" % (option, value) + os.linesep)
 199
 200         buf.write("?>" + os.linesep)
 201
 202         return buf.getvalue()
 203
 204     def output_xml(self, encoding = "utf-8"):
 205         pass
 206
 207     def output_variables(self, encoding="utf-8"):
 208         """
 209         Return list of all variable names.
 210         """
 211
 212         buf = codecs.lookup(encoding)[3](StringIO())
 213         for section in self.sections():
 214             for (name,value) in self.items(section):
 215                 option = "%s_%s" % (section,name)
 216                 buf.write(option + os.linesep)
 217
 218         return buf.getvalue()
 219         pass
 220
 221     def write(self, filename=None):
 222         if not filename:
 223             filename = self.filename
 224         configfile = open(filename, 'w')
 225         self.config.write(configfile)
 226
 227     def save(self, filename=None):
 228         self.write(filename)
 229
 230
 231     def get_trustedroots_dir(self):
 232         return self.config_path + os.sep + 'trusted_roots'
 233
 234     def get_openflow_aggrMgr_info(self):
 235         aggr_mgr_ip = 'localhost'
 236         if (hasattr(self,'openflow_aggregate_manager_ip')):
 237             aggr_mgr_ip = self.OPENFLOW_AGGREGATE_MANAGER_IP
 238
 239         aggr_mgr_port = 2603
 240         if (hasattr(self,'openflow_aggregate_manager_port')):
 241             aggr_mgr_port = self.OPENFLOW_AGGREGATE_MANAGER_PORT
 242
 243         return (aggr_mgr_ip,aggr_mgr_port)
 244
 245     def get_interface_hrn(self):
 246         if (hasattr(self,'sfa_interface_hrn')):
 247             return self.SFA_INTERFACE_HRN
 248         else:
 249             return "plc"
 250
 251     def __getattr__(self, attr):
 252         return getattr(self.config, attr)
 253
 254 if __name__ == '__main__':
 255     filename = None
 256     if len(sys.argv) > 1:
 257         filename = sys.argv[1]
 258         config = Config(filename)
 259     else:
 260         config = Config()
 261     config.dump()
 262