2 """Loading of configuration files and parameters.
4 @type version: L{twisted.python.versions.Version}
5 @var version: the version of this program
6 @type DEFAULT_CONFIG_FILES: C{list} of C{string}
7 @var DEFAULT_CONFIG_FILES: the default config files to load (in order)
8 @var DEFAULTS: the default config parameter values for the main program
9 @var DHT_DEFAULTS: the default config parameter values for the default DHT
14 from ConfigParser import SafeConfigParser
16 from twisted.python import log, versions
17 from twisted.trial import unittest
19 class ConfigError(Exception):
20 """Errors that occur in the loading of configuration variables."""
21 def __init__(self, message):
22 self.message = message
24 return repr(self.message)
26 version = versions.Version('apt-p2p', 0, 0, 0)
28 # Set the home parameter
29 home = os.path.expandvars('${HOME}')
30 if home == '${HOME}' or not os.path.isdir(home):
31 home = os.path.expanduser('~')
32 if not os.path.isdir(home):
33 home = os.path.abspath(os.path.dirname(sys.argv[0]))
35 DEFAULT_CONFIG_FILES=['/etc/apt-p2p/apt-p2p.conf',
36 home + '/.apt-p2p/apt-p2p.conf']
40 # Port to listen on for all requests (TCP and UDP)
43 # The rate to limit sending data to peers to, in KBytes/sec.
44 # Set this to 0 to not limit the upload bandwidth.
47 # Directory to store the downloaded files in
48 'CACHE_DIR': home + '/.apt-p2p/cache',
50 # Other directories containing packages to share with others
51 # WARNING: all files in these directories will be hashed and available
52 # for everybody to download
55 # User name to try and run as
58 # Whether it's OK to use an IP address from a known local/private range
61 # Unload the packages cache after an interval of inactivity this long.
62 # The packages cache uses a lot of memory, and only takes a few seconds
63 # to reload when a new request arrives.
64 'UNLOAD_PACKAGES_CACHE': '5m',
66 # Refresh the DHT keys after this much time has passed.
67 # This should be a time slightly less than the DHT's KEY_EXPIRE value.
70 # Which DHT implementation to use.
71 # It must be possible to do "from <DHT>.DHT import DHT" to get a class that
72 # implements the IDHT interface.
73 'DHT': 'apt_p2p_Khashmir',
75 # Whether to only run the DHT (for providing only a bootstrap node)
80 # bootstrap nodes to contact to join the DHT
81 'BOOTSTRAP': """www.camrdale.org:9977""",
83 # whether this node is a bootstrap node
84 'BOOTSTRAP_NODE': "no",
86 # Kademlia "K" constant, this should be an even number
89 # SHA1 is 160 bits long
92 # checkpoint every this many seconds
93 'CHECKPOINT_INTERVAL': '5m', # five minutes
96 # concurrent xmlrpc calls per find node/value request!
97 'CONCURRENT_REQS': '4',
99 # how many hosts to post to
100 'STORE_REDUNDANCY': '3',
102 # How many values to attempt to retrieve from the DHT.
103 # Setting this to 0 will try and get all values (which could take a while if
104 # a lot of nodes have values). Setting it negative will try to get that
105 # number of results from only the closest STORE_REDUNDANCY nodes to the hash.
106 # The default is a large negative number so all values from the closest
107 # STORE_REDUNDANCY nodes will be retrieved.
108 'RETRIEVE_VALUES': '-10000',
110 ### ROUTING TABLE STUFF
111 # how many times in a row a node can fail to respond before it's booted from the routing table
114 # never ping a node more often than this
115 'MIN_PING_INTERVAL': '15m', # fifteen minutes
117 # refresh buckets that haven't been touched in this long
118 'BUCKET_STALENESS': '1h', # one hour
120 # expire entries older than this
121 'KEY_EXPIRE': '1h', # 60 minutes
123 # whether to spew info about the requests/responses in the protocol
127 class AptP2PConfigParser(SafeConfigParser):
128 """Adds 'gettime' and 'getstringlist' to ConfigParser objects.
130 @ivar time_multipliers: the 'gettime' suffixes and the multipliers needed
131 to convert them to seconds
141 def gettime(self, section, option):
142 """Read the config parameter as a time value."""
144 value = self.get(section, option)
146 raise ConfigError("Configuration parse error: [%s] %s" % (section, option))
147 suffix = value[-1].lower()
148 if suffix in self.time_multipliers.keys():
149 mult = self.time_multipliers[suffix]
151 return int(value)*mult
153 def getstring(self, section, option):
154 """Read the config parameter as a string."""
155 return self.get(section,option)
157 def getstringlist(self, section, option):
158 """Read the multi-line config parameter as a list of strings."""
159 return self.get(section,option).split()
161 def optionxform(self, option):
162 """Use all uppercase in the config parameters names."""
163 return option.upper()
165 # Initialize the default config parameters
166 config = AptP2PConfigParser(DEFAULTS)
167 config.add_section(config.get('DEFAULT', 'DHT'))
168 for k in DHT_DEFAULTS:
169 config.set(config.get('DEFAULT', 'DHT'), k, DHT_DEFAULTS[k])
171 class TestConfigParser(unittest.TestCase):
172 """Unit tests for the config parser."""
174 def test_uppercase(self):
175 config.set('DEFAULT', 'case_tester', 'foo')
176 self.failUnless(config.get('DEFAULT', 'CASE_TESTER') == 'foo')
177 self.failUnless(config.get('DEFAULT', 'case_tester') == 'foo')
178 config.set('DEFAULT', 'TEST_CASE', 'bar')
179 self.failUnless(config.get('DEFAULT', 'TEST_CASE') == 'bar')
180 self.failUnless(config.get('DEFAULT', 'test_case') == 'bar')
181 config.set('DEFAULT', 'FINAL_test_CASE', 'foobar')
182 self.failUnless(config.get('DEFAULT', 'FINAL_TEST_CASE') == 'foobar')
183 self.failUnless(config.get('DEFAULT', 'final_test_case') == 'foobar')
184 self.failUnless(config.get('DEFAULT', 'FINAL_test_CASE') == 'foobar')
185 self.failUnless(config.get('DEFAULT', 'final_TEST_case') == 'foobar')
188 config.set('DEFAULT', 'time_tester_1', '2d')
189 self.failUnless(config.gettime('DEFAULT', 'time_tester_1') == 2*86400)
190 config.set('DEFAULT', 'time_tester_2', '3h')
191 self.failUnless(config.gettime('DEFAULT', 'time_tester_2') == 3*3600)
192 config.set('DEFAULT', 'time_tester_3', '4m')
193 self.failUnless(config.gettime('DEFAULT', 'time_tester_3') == 4*60)
194 config.set('DEFAULT', 'time_tester_4', '37s')
195 self.failUnless(config.gettime('DEFAULT', 'time_tester_4') == 37)
197 def test_string(self):
198 config.set('DEFAULT', 'string_test', 'foobar')
199 self.failUnless(type(config.getstring('DEFAULT', 'string_test')) == str)
200 self.failUnless(config.getstring('DEFAULT', 'string_test') == 'foobar')
202 def test_stringlist(self):
203 config.set('DEFAULT', 'stringlist_test', """foo
206 l = config.getstringlist('DEFAULT', 'stringlist_test')
207 self.failUnless(type(l) == list)
208 self.failUnless(len(l) == 3)
209 self.failUnless(l[0] == 'foo')
210 self.failUnless(l[1] == 'bar')
211 self.failUnless(l[2] == 'foobar')