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| #!/usr/bin/env python | |
| """ | |
| Regex for URIs | |
| These regex are directly derived from the collected ABNF in RFC3986 | |
| (except for DIGIT, ALPHA and HEXDIG, defined by RFC2234). | |
| They should be processed with re.VERBOSE. | |
| """ | |
| __license__ = """ | |
| Copyright (c) 2009 Mark Nottingham (code portions) | |
| Permission is hereby granted, free of charge, to any person obtaining a copy | |
| of this software and associated documentation files (the "Software"), to deal | |
| in the Software without restriction, including without limitation the rights | |
| to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| copies of the Software, and to permit persons to whom the Software is | |
| furnished to do so, subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in | |
| all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
| THE SOFTWARE. | |
| """ | |
| ### basics | |
| DIGIT = r"[\x30-\x39]" | |
| ALPHA = r"[\x41-\x5A\x61-\x7A]" | |
| HEXDIG = r"[\x30-\x39ABCDEF]" | |
| # pct-encoded = "%" HEXDIG HEXDIG | |
| pct_encoded = r" %% %(HEXDIG)s %(HEXDIG)s" % locals() | |
| # unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~" | |
| unreserved = r"(?: %(ALPHA)s | %(DIGIT)s | \- | \. | _ | ~ )" % locals() | |
| # gen-delims = ":" / "/" / "?" / "#" / "[" / "]" / "@" | |
| gen_delims = r"(?: : | / | \? | \# | \[ | \] | @ )" | |
| # sub-delims = "!" / "$" / "&" / "'" / "(" / ")" | |
| # / "*" / "+" / "," / ";" / "=" | |
| sub_delims = r"""(?: ! | \$ | & | ' | \( | \) | | |
| \* | \+ | , | ; | = )""" | |
| # pchar = unreserved / pct-encoded / sub-delims / ":" / "@" | |
| pchar = r"(?: %(unreserved)s | %(pct_encoded)s | %(sub_delims)s | : | @ )" % locals() | |
| # reserved = gen-delims / sub-delims | |
| reserved = r"(?: %(gen_delims)s | %(sub_delims)s )" % locals() | |
| ### scheme | |
| # scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." ) | |
| scheme = r"%(ALPHA)s (?: %(ALPHA)s | %(DIGIT)s | \+ | \- | \. )*" % locals() | |
| ### authority | |
| # dec-octet = DIGIT ; 0-9 | |
| # / %x31-39 DIGIT ; 10-99 | |
| # / "1" 2DIGIT ; 100-199 | |
| # / "2" %x30-34 DIGIT ; 200-249 | |
| # / "25" %x30-35 ; 250-255 | |
| dec_octet = r"""(?: %(DIGIT)s | | |
| [\x31-\x39] %(DIGIT)s | | |
| 1 %(DIGIT)s{2} | | |
| 2 [\x30-\x34] %(DIGIT)s | | |
| 25 [\x30-\x35] | |
| ) | |
| """ % locals() | |
| # IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet | |
| IPv4address = r"%(dec_octet)s \. %(dec_octet)s \. %(dec_octet)s \. %(dec_octet)s" % locals() | |
| # h16 = 1*4HEXDIG | |
| h16 = r"(?: %(HEXDIG)s ){1,4}" % locals() | |
| # ls32 = ( h16 ":" h16 ) / IPv4address | |
| ls32 = r"(?: (?: %(h16)s : %(h16)s ) | %(IPv4address)s )" % locals() | |
| # IPv6address = 6( h16 ":" ) ls32 | |
| # / "::" 5( h16 ":" ) ls32 | |
| # / [ h16 ] "::" 4( h16 ":" ) ls32 | |
| # / [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32 | |
| # / [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32 | |
| # / [ *3( h16 ":" ) h16 ] "::" h16 ":" ls32 | |
| # / [ *4( h16 ":" ) h16 ] "::" ls32 | |
| # / [ *5( h16 ":" ) h16 ] "::" h16 | |
| # / [ *6( h16 ":" ) h16 ] "::" | |
| IPv6address = r"""(?: (?: %(h16)s : ){6} %(ls32)s | | |
| :: (?: %(h16)s : ){5} %(ls32)s | | |
| %(h16)s :: (?: %(h16)s : ){4} %(ls32)s | | |
| (?: %(h16)s : ) %(h16)s :: (?: %(h16)s : ){3} %(ls32)s | | |
| (?: %(h16)s : ){2} %(h16)s :: (?: %(h16)s : ){2} %(ls32)s | | |
| (?: %(h16)s : ){3} %(h16)s :: %(h16)s : %(ls32)s | | |
| (?: %(h16)s : ){4} %(h16)s :: %(ls32)s | | |
| (?: %(h16)s : ){5} %(h16)s :: %(h16)s | | |
| (?: %(h16)s : ){6} %(h16)s :: | |
| ) | |
| """ % locals() | |
| # IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" ) | |
| IPvFuture = r"v %(HEXDIG)s+ \. (?: %(unreserved)s | %(sub_delims)s | : )+" % locals() | |
| # IP-literal = "[" ( IPv6address / IPvFuture ) "]" | |
| IP_literal = r"\[ (?: %(IPv6address)s | %(IPvFuture)s ) \]" % locals() | |
| # reg-name = *( unreserved / pct-encoded / sub-delims ) | |
| reg_name = r"(?: %(unreserved)s | %(pct_encoded)s | %(sub_delims)s )*" % locals() | |
| # userinfo = *( unreserved / pct-encoded / sub-delims / ":" ) | |
| userinfo = r"(?: %(unreserved)s | %(pct_encoded)s | %(sub_delims)s | : )" % locals() | |
| # host = IP-literal / IPv4address / reg-name | |
| host = r"(?: %(IP_literal)s | %(IPv4address)s | %(reg_name)s )" % locals() | |
| # port = *DIGIT | |
| port = r"(?: %(DIGIT)s )*" % locals() | |
| # authority = [ userinfo "@" ] host [ ":" port ] | |
| authority = r"(?: %(userinfo)s @)? %(host)s (?: : %(port)s)?" % locals() | |
| ### Path | |
| # segment = *pchar | |
| segment = r"%(pchar)s*" % locals() | |
| # segment-nz = 1*pchar | |
| segment_nz = r"%(pchar)s+" % locals() | |
| # segment-nz-nc = 1*( unreserved / pct-encoded / sub-delims / "@" ) | |
| # ; non-zero-length segment without any colon ":" | |
| segment_nz_nc = r"(?: %(unreserved)s | %(pct_encoded)s | %(sub_delims)s | @ )+" % locals() | |
| # path-abempty = *( "/" segment ) | |
| path_abempty = r"(?: / %(segment)s )*" % locals() | |
| # path-absolute = "/" [ segment-nz *( "/" segment ) ] | |
| path_absolute = r"/ (?: %(segment_nz)s (?: / %(segment)s )* )?" % locals() | |
| # path-noscheme = segment-nz-nc *( "/" segment ) | |
| path_noscheme = r"%(segment_nz_nc)s (?: / %(segment)s )*" % locals() | |
| # path-rootless = segment-nz *( "/" segment ) | |
| path_rootless = r"%(segment_nz)s (?: / %(segment)s )*" % locals() | |
| # path-empty = 0<pchar> | |
| path_empty = r"" ### FIXME | |
| # path = path-abempty ; begins with "/" or is empty | |
| # / path-absolute ; begins with "/" but not "//" | |
| # / path-noscheme ; begins with a non-colon segment | |
| # / path-rootless ; begins with a segment | |
| # / path-empty ; zero characters | |
| path = r"""(?: %(path_abempty)s | | |
| %(path_absolute)s | | |
| %(path_noscheme)s | | |
| %(path_rootless)s | | |
| %(path_empty)s | |
| ) | |
| """ % locals() | |
| ### Query and Fragment | |
| # query = *( pchar / "/" / "?" ) | |
| query = r"(?: %(pchar)s | / | \? )*" % locals() | |
| # fragment = *( pchar / "/" / "?" ) | |
| fragment = r"(?: %(pchar)s | / | \? )*" % locals() | |
| ### URIs | |
| # hier-part = "//" authority path-abempty | |
| # / path-absolute | |
| # / path-rootless | |
| # / path-empty | |
| hier_part = r"""(?: (?: // %(authority)s %(path_abempty)s ) | | |
| %(path_absolute)s | | |
| %(path_rootless)s | | |
| %(path_empty)s | |
| ) | |
| """ % locals() | |
| # relative-part = "//" authority path-abempty | |
| # / path-absolute | |
| # / path-noscheme | |
| # / path-empty | |
| relative_part = r"""(?: (?: // %(authority)s %(path_abempty)s ) | | |
| %(path_absolute)s | | |
| %(path_noscheme)s | | |
| %(path_empty)s | |
| ) | |
| """ % locals() | |
| # relative-ref = relative-part [ "?" query ] [ "#" fragment ] | |
| relative_ref = r"%(relative_part)s (?: \? %(query)s)? (?: \# %(fragment)s)?" % locals() | |
| # URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ] | |
| URI = r"(?: %(scheme)s : %(hier_part)s (?: \? %(query)s )? (?: \# %(fragment)s )? )" % locals() | |
| # URI-reference = URI / relative-ref | |
| URI_reference = r"(?: %(URI)s | %(relative_ref)s )" % locals() | |
| # absolute-URI = scheme ":" hier-part [ "?" query ] | |
| absolute_URI = r"(?: %(scheme)s : %(hier_part)s (?: \? %(query)s )? )" % locals() | |
| if "__main__" == __name__: | |
| import re | |
| import sys | |
| try: | |
| instr = sys.argv[1] | |
| except IndexError: | |
| print "usage: %s test-string" % sys.argv[0] | |
| sys.exit(1) | |
| print 'testing: "%s"' % instr | |
| print "URI:", | |
| if re.match("^%s$" % URI, instr, re.VERBOSE): | |
| print "yes" | |
| else: | |
| print "no" | |
| print "URI reference:", | |
| if re.match("^%s$" % URI_reference, instr, re.VERBOSE): | |
| print "yes" | |
| else: | |
| print "no" | |
| print "Absolute URI:", | |
| if re.match("^%s$" % absolute_URI, instr, re.VERBOSE): | |
| print "yes" | |
| else: | |
| print "no" |
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