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add parser for immutable directory caps: DIR2-CHK, DIR2-LIT, DIR2-CHK-Verifier

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This commit is contained in:
Brian Warner 2009-11-04 09:24:53 -08:00
parent 9733201c0b
commit f47672d12a
2 changed files with 112 additions and 0 deletions
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61
src/allmydata/test/test_uri.py
View File

@ -331,3 +331,64 @@ class NewDirnode(unittest.TestCase):
self.failUnless(IVerifierURI.providedBy(v))
self.failUnlessEqual(v._filenode_uri,
u1.get_verify_cap()._filenode_uri)
def test_immutable(self):
readkey = "\x01" * 16
uri_extension_hash = hashutil.uri_extension_hash("stuff")
needed_shares = 3
total_shares = 10
size = 1234
fnuri = uri.CHKFileURI(key=readkey,
uri_extension_hash=uri_extension_hash,
needed_shares=needed_shares,
total_shares=total_shares,
size=size)
fncap = fnuri.to_string()
self.failUnlessEqual(fncap, "URI:CHK:aeaqcaibaeaqcaibaeaqcaibae:nf3nimquen7aeqm36ekgxomalstenpkvsdmf6fplj7swdatbv5oa:3:10:1234")
u1 = uri.ImmutableDirectoryURI(fnuri)
self.failUnless(u1.is_readonly())
self.failIf(u1.is_mutable())
self.failUnless(IURI.providedBy(u1))
self.failIf(IFileURI.providedBy(u1))
self.failUnless(IDirnodeURI.providedBy(u1))
self.failUnless("DirectoryURI" in str(u1))
u1_filenode = u1.get_filenode_uri()
self.failIf(u1_filenode.is_mutable())
self.failUnless(u1_filenode.is_readonly())
self.failUnlessEqual(u1_filenode.to_string(), fncap)
self.failUnless(str(u1))
u2 = uri.from_string(u1.to_string())
self.failUnlessEqual(u1.to_string(), u2.to_string())
self.failUnless(u2.is_readonly())
self.failIf(u2.is_mutable())
self.failUnless(IURI.providedBy(u2))
self.failIf(IFileURI.providedBy(u2))
self.failUnless(IDirnodeURI.providedBy(u2))
u3 = u2.get_readonly()
self.failUnlessEqual(u3.to_string(), u2.to_string())
self.failUnless(str(u3))
u2_verifier = u2.get_verify_cap()
self.failUnless(isinstance(u2_verifier,
uri.ImmutableDirectoryURIVerifier), u2_verifier)
self.failUnless(IVerifierURI.providedBy(u2_verifier))
u2_verifier_fileuri = u2_verifier.get_filenode_uri()
self.failUnless(IVerifierURI.providedBy(u2_verifier_fileuri))
self.failUnlessEqual(u2_verifier_fileuri.to_string(),
fnuri.get_verify_cap().to_string())
self.failUnless(str(u2_verifier))
def test_literal(self):
u1 = uri.LiteralDirectoryURI("data")
self.failUnless(str(u1))
u1s = u1.to_string()
self.failUnlessEqual(u1.to_string(), "URI:DIR2-LIT:mrqxiyi")
self.failUnless(u1.is_readonly())
self.failIf(u1.is_mutable())
self.failUnless(IURI.providedBy(u1))
self.failIf(IFileURI.providedBy(u1))
self.failUnless(IDirnodeURI.providedBy(u1))
self.failUnlessEqual(u1.get_verify_cap(), None)

51
src/allmydata/uri.py
View File

@ -48,6 +48,7 @@ class _BaseURI:
class CHKFileURI(_BaseURI):
implements(IURI, IImmutableFileURI)
BASE_STRING='URI:CHK:'
STRING_RE=re.compile('^URI:CHK:'+BASE32STR_128bits+':'+
BASE32STR_256bits+':'+NUMBER+':'+NUMBER+':'+NUMBER+
'$')
@ -159,6 +160,7 @@ class CHKFileVerifierURI(_BaseURI):
class LiteralFileURI(_BaseURI):
implements(IURI, IImmutableFileURI)
BASE_STRING='URI:LIT:'
STRING_RE=re.compile('^URI:LIT:'+base32.BASE32STR_anybytes+'$')
HUMAN_RE=re.compile('^'+OPTIONALHTTPLEAD+'URI'+SEP+'LIT'+SEP+base32.BASE32STR_anybytes+'$')
@ -422,6 +424,44 @@ class ReadonlyDirectoryURI(_DirectoryBaseURI):
def get_readonly(self):
return self
class _ImmutableDirectoryBaseURI(_DirectoryBaseURI):
def __init__(self, filenode_uri=None):
if filenode_uri:
assert isinstance(filenode_uri, self.INNER_URI_CLASS), filenode_uri
_DirectoryBaseURI.__init__(self, filenode_uri)
def is_mutable(self):
return False
def is_readonly(self):
return True
def get_readonly(self):
return self
class ImmutableDirectoryURI(_ImmutableDirectoryBaseURI):
BASE_STRING='URI:DIR2-CHK:'
BASE_STRING_RE=re.compile('^'+BASE_STRING)
BASE_HUMAN_RE=re.compile('^'+OPTIONALHTTPLEAD+'URI'+SEP+'DIR2-CHK'+SEP)
INNER_URI_CLASS=CHKFileURI
def get_verify_cap(self):
vcap = self._filenode_uri.get_verify_cap()
return ImmutableDirectoryURIVerifier(vcap)
class LiteralDirectoryURI(_ImmutableDirectoryBaseURI):
BASE_STRING='URI:DIR2-LIT:'
BASE_STRING_RE=re.compile('^'+BASE_STRING)
BASE_HUMAN_RE=re.compile('^'+OPTIONALHTTPLEAD+'URI'+SEP+'DIR2-LIT'+SEP)
INNER_URI_CLASS=LiteralFileURI
def __init__(self, data=None):
filenode_uri = LiteralFileURI(data)
_ImmutableDirectoryBaseURI.__init__(self, filenode_uri)
def get_verify_cap(self):
# LIT caps have no verifier, since they aren't distributed
return None
class DirectoryURIVerifier(_DirectoryBaseURI):
implements(IVerifierURI)
@ -438,6 +478,13 @@ class DirectoryURIVerifier(_DirectoryBaseURI):
def get_filenode_uri(self):
return self._filenode_uri
class ImmutableDirectoryURIVerifier(DirectoryURIVerifier):
implements(IVerifierURI)
BASE_STRING='URI:DIR2-CHK-Verifier:'
BASE_STRING_RE=re.compile('^'+BASE_STRING)
BASE_HUMAN_RE=re.compile('^'+OPTIONALHTTPLEAD+'URI'+SEP+'DIR2-CHK-VERIFIER'+SEP)
INNER_URI_CLASS=CHKFileVerifierURI
class UnknownURI:
def __init__(self, uri):
self._uri = uri
@ -465,6 +512,10 @@ def from_string(s):
return ReadonlyDirectoryURI.init_from_string(s)
elif s.startswith('URI:DIR2-Verifier:'):
return DirectoryURIVerifier.init_from_string(s)
elif s.startswith('URI:DIR2-CHK:'):
return ImmutableDirectoryURI.init_from_string(s)
elif s.startswith('URI:DIR2-LIT:'):
return LiteralDirectoryURI.init_from_string(s)
return UnknownURI(s)
def is_uri(s):