--- /dev/null
+"""
+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.
+
+Thanks Mark Nottingham for this code - https://gist.github.com/138549
+"""
+from __future__ import unicode_literals
+import re
+
+# basics
+
+DIGIT = r"[\x30-\x39]"
+
+ALPHA = r"[\x41-\x5A\x61-\x7A]"
+
+HEXDIG = r"[\x30-\x39A-Fa-f]"
+
+# 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(
+)
+
+
+def is_uri(uri):
+ return re.match(URI, uri, re.VERBOSE)
+
+
+def is_uri_reference(uri):
+ return re.match(URI_reference, uri, re.VERBOSE)
+
+
+def is_absolute_uri(uri):
+ return re.match(absolute_URI, uri, re.VERBOSE)
projects / twitter-api-cdsw / blobdiff