From: Zooko O'Whielacronx Date: Thu, 3 Jan 2008 05:12:15 +0000 (-0700) Subject: refactor constructing URI objects from strings and add human-encoding of WriteableSSK... X-Git-Tag: allmydata-tahoe-0.7.0~47 X-Git-Url: https://git.rkrishnan.org/%5B/%5D%20/uri//%22%22?a=commitdiff_plain;h=eae499539d2058ebe8c8728eb507982412c9d606;p=tahoe-lafs%2Ftahoe-lafs.git refactor constructing URI objects from strings and add human-encoding of WriteableSSKFileURI --- diff --git a/src/allmydata/uri.py b/src/allmydata/uri.py index 46921cd2..0433d908 100644 --- a/src/allmydata/uri.py +++ b/src/allmydata/uri.py @@ -18,7 +18,7 @@ ZBASE32STR_256bits = "%s{51}%s" % (ZBASE32CHAR, ZBASE32CHAR_1bits) COLON="(:|%3A)" # Writeable SSK bits -WSSKBITS= "%s%s%s" % (ZBASE32STR_128bits, COLON, ZBASE32STR_256bits) +WSSKBITS= "(%s)%s(%s)" % (ZBASE32STR_128bits, COLON, ZBASE32STR_256bits) # URIs (soon to be renamed "caps") are always allowed to come with a leading # "http://127.0.0.1:8123/uri/" that will be ignored. @@ -59,7 +59,8 @@ class CHKFileURI(_BaseURI): % name) self.storage_index = hashutil.storage_index_chk_hash(self.key) - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:CHK:"), uri d = {} (header_uri, header_chk, @@ -68,22 +69,24 @@ class CHKFileURI(_BaseURI): assert header_uri == "URI" assert header_chk == "CHK" - self.key = idlib.a2b(key_s) - assert isinstance(self.key, str) - assert len(self.key) == 16 # AES-128 + key = idlib.a2b(key_s) + assert isinstance(key, str) + assert len(key) == 16 # AES-128 - self.storage_index = hashutil.storage_index_chk_hash(self.key) - assert isinstance(self.storage_index, str) - assert len(self.storage_index) == 16 # sha256 hash truncated to 128 + storage_index = hashutil.storage_index_chk_hash(key) + assert isinstance(storage_index, str) + assert len(storage_index) == 16 # sha256 hash truncated to 128 - self.uri_extension_hash = idlib.a2b(uri_extension_hash_s) - assert isinstance(self.uri_extension_hash, str) - assert len(self.uri_extension_hash) == 32 # sha56 hash + uri_extension_hash = idlib.a2b(uri_extension_hash_s) + assert isinstance(uri_extension_hash, str) + assert len(uri_extension_hash) == 32 # sha256 hash - self.needed_shares = int(needed_shares_s) - self.total_shares = int(total_shares_s) - self.size = int(size_s) - return self + needed_shares = int(needed_shares_s) + total_shares = int(total_shares_s) + size = int(size_s) + return cls(key=key, uri_extension_hash=uri_extension_hash, + needed_shares=needed_shares, total_shares=total_shares, + size=size) def to_string(self): assert isinstance(self.needed_shares, int) @@ -131,7 +134,8 @@ class CHKFileVerifierURI(_BaseURI): self.total_shares = total_shares self.size = size - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:CHK-Verifier:"), uri d = {} (header_uri, header_chk, @@ -140,18 +144,23 @@ class CHKFileVerifierURI(_BaseURI): assert header_uri == "URI" assert header_chk == "CHK-Verifier" - self.storage_index = idlib.a2b(storage_index_s) - assert isinstance(self.storage_index, str) - assert len(self.storage_index) == 16 # sha256 hash truncated to 128 + storage_index = idlib.a2b(storage_index_s) + assert isinstance(storage_index, str) + assert len(storage_index) == 16 # sha256 hash truncated to 128 - self.uri_extension_hash = idlib.a2b(uri_extension_hash_s) - assert isinstance(self.uri_extension_hash, str) - assert len(self.uri_extension_hash) == 32 # sha56 hash + uri_extension_hash = idlib.a2b(uri_extension_hash_s) + assert isinstance(uri_extension_hash, str) + assert len(uri_extension_hash) == 32 # sha256 hash - self.needed_shares = int(needed_shares_s) - self.total_shares = int(total_shares_s) - self.size = int(size_s) - return self + needed_shares = int(needed_shares_s) + total_shares = int(total_shares_s) + size = int(size_s) + + return cls(storage_index=storage_index, + uri_extension_hash=uri_extension_hash, + needed_shares=needed_shares, + total_shares=total_shares, + size=size) def to_string(self): assert isinstance(self.needed_shares, int) @@ -173,11 +182,11 @@ class LiteralFileURI(_BaseURI): if data is not None: self.data = data - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:LIT:") data_s = uri[len("URI:LIT:"):] - self.data = idlib.a2b(data_s) - return self + return cls(idlib.a2b(data_s)) def to_string(self): return "URI:LIT:%s" % idlib.b2a(self.data) @@ -199,22 +208,28 @@ class LiteralFileURI(_BaseURI): class WriteableSSKFileURI(_BaseURI): implements(IURI, IMutableFileURI) - def __init__(self, *args, **kwargs): - if not args and not kwargs: - return - self.populate(*args, **kwargs) - - def populate(self, writekey, fingerprint): + def __init__(self, writekey, fingerprint): self.writekey = writekey self.readkey = hashutil.ssk_readkey_hash(writekey) self.storage_index = hashutil.ssk_storage_index_hash(self.readkey) self.fingerprint = fingerprint - def init_from_string(self, uri): + @classmethod + def init_from_human_encoding(cls, uri): + mo = WriteableSSKFileURI_RE.search(uri) + assert mo + return cls(idlib.a2b(mo.group(5)), idlib.a2b(mo.group(7))) + + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:SSK:"), uri (header_uri, header_ssk, writekey_s, fingerprint_s) = uri.split(":") - self.populate(idlib.a2b(writekey_s), idlib.a2b(fingerprint_s)) - return self + return cls(idlib.a2b(writekey_s), idlib.a2b(fingerprint_s)) + + def to_human_encoding(self): + assert isinstance(self.writekey, str) + assert isinstance(self.fingerprint, str) + return "http://127.0.0.1:8123/uri/URI:SSK:%s:%s" % (idlib.b2a(self.writekey), idlib.b2a(self.fingerprint)) def to_string(self): assert isinstance(self.writekey, str) @@ -240,21 +255,16 @@ class WriteableSSKFileURI(_BaseURI): class ReadonlySSKFileURI(_BaseURI): implements(IURI, IMutableFileURI) - def __init__(self, *args, **kwargs): - if not args and not kwargs: - return - self.populate(*args, **kwargs) - - def populate(self, readkey, fingerprint): + def __init__(self, readkey, fingerprint): self.readkey = readkey self.storage_index = hashutil.ssk_storage_index_hash(self.readkey) self.fingerprint = fingerprint - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:SSK-RO:"), uri (header_uri, header_ssk, readkey_s, fingerprint_s) = uri.split(":") - self.populate(idlib.a2b(readkey_s), idlib.a2b(fingerprint_s)) - return self + return cls(idlib.a2b(readkey_s), idlib.a2b(fingerprint_s)) def to_string(self): assert isinstance(self.readkey, str) @@ -280,21 +290,16 @@ class ReadonlySSKFileURI(_BaseURI): class SSKVerifierURI(_BaseURI): implements(IVerifierURI) - def __init__(self, *args, **kwargs): - if not args and not kwargs: - return - self.populate(*args, **kwargs) - - def populate(self, storage_index, fingerprint): + def __init__(self, storage_index, fingerprint): self.storage_index = storage_index self.fingerprint = fingerprint - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:SSK-Verifier:"), uri (header_uri, header_ssk, storage_index_s, fingerprint_s) = uri.split(":") - self.populate(idlib.a2b(storage_index_s), idlib.a2b(fingerprint_s)) - return self + return cls(idlib.a2b(storage_index_s), idlib.a2b(fingerprint_s)) def to_string(self): assert isinstance(self.storage_index, str) @@ -329,13 +334,12 @@ class NewDirectoryURI(_NewDirectoryBaseURI): assert not filenode_uri.is_readonly() _NewDirectoryBaseURI.__init__(self, filenode_uri) - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:DIR2:") (header_uri, header_dir2, bits) = uri.split(":", 2) - fn = WriteableSSKFileURI() - fn.init_from_string("URI:SSK:" + bits) - self._filenode_uri = fn - return self + fn = WriteableSSKFileURI.init_from_string("URI:SSK:" + bits) + return cls(fn) def to_string(self): assert isinstance(self._filenode_uri, WriteableSSKFileURI) @@ -356,13 +360,12 @@ class ReadonlyNewDirectoryURI(_NewDirectoryBaseURI): assert filenode_uri.is_readonly() _NewDirectoryBaseURI.__init__(self, filenode_uri) - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:DIR2-RO:") (header_uri, header_dir2, bits) = uri.split(":", 2) - fn = ReadonlySSKFileURI() - fn.init_from_string("URI:SSK-RO:" + bits) - self._filenode_uri = fn - return self + fn = ReadonlySSKFileURI.init_from_string("URI:SSK-RO:" + bits) + return cls(fn) def to_string(self): assert isinstance(self._filenode_uri, ReadonlySSKFileURI) @@ -384,13 +387,12 @@ class NewDirectoryURIVerifier(_BaseURI): filenode_uri = IVerifierURI(filenode_uri) self._filenode_uri = filenode_uri - def init_from_string(self, uri): + @classmethod + def init_from_string(cls, uri): assert uri.startswith("URI:DIR2-Verifier:") (header_uri, header_dir2, bits) = uri.split(":", 2) - fn = SSKVerifierURI() - fn.init_from_string("URI:SSK-Verifier:" + bits) - self._filenode_uri = fn - return self + fv = SSKVerifierURI.init_from_string("URI:SSK-Verifier:" + bits) + return cls(fv) def to_string(self): assert isinstance(self._filenode_uri, SSKVerifierURI) @@ -403,27 +405,25 @@ class NewDirectoryURIVerifier(_BaseURI): - - def from_string(s): if s.startswith("URI:CHK:"): - return CHKFileURI().init_from_string(s) + return CHKFileURI.init_from_string(s) elif s.startswith("URI:CHK-Verifier:"): - return CHKFileVerifierURI().init_from_string(s) + return CHKFileVerifierURI.init_from_string(s) elif s.startswith("URI:LIT:"): - return LiteralFileURI().init_from_string(s) + return LiteralFileURI.init_from_string(s) elif s.startswith("URI:SSK:"): - return WriteableSSKFileURI().init_from_string(s) + return WriteableSSKFileURI.init_from_string(s) elif s.startswith("URI:SSK-RO:"): - return ReadonlySSKFileURI().init_from_string(s) + return ReadonlySSKFileURI.init_from_string(s) elif s.startswith("URI:SSK-Verifier:"): - return SSKVerifierURI().init_from_string(s) + return SSKVerifierURI.init_from_string(s) elif s.startswith("URI:DIR2:"): - return NewDirectoryURI().init_from_string(s) + return NewDirectoryURI.init_from_string(s) elif s.startswith("URI:DIR2-RO:"): - return ReadonlyNewDirectoryURI().init_from_string(s) + return ReadonlyNewDirectoryURI.init_from_string(s) elif s.startswith("URI:DIR2-Verifier:"): - return NewDirectoryURIVerifier().init_from_string(s) + return NewDirectoryURIVerifier.init_from_string(s) else: raise TypeError("unknown URI type: %s.." % s[:12])