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URI Regular Expression
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| /** | |
| * Regex for validating a URI or URI Reference as defined in RFC3986. | |
| * | |
| * A URI Reference is a URI without the scheme part. They are otherwise the | |
| * same except that the first segment of a relative path of a URI reference | |
| * can't contain a ':'. | |
| * | |
| * This syntax does not have IPv6 address support and does not include the IPv4 | |
| * rule because IPv4 addresses happens to be a subset of registered names. | |
| * Although the final regex can be made a little bit more compact the intent is | |
| * to follow the rules as closely as possible for readability and not introduce | |
| * any new rules. | |
| */ | |
| #define URI SCHEME ":" HIER_PART "(\\?" QUERY ")?(#" FRAGMENT ")?" | |
| #define HIER_PART "(//" AUTHORITY PATH_ABEMPTY "|" PATH_ABSOLUTE "|" PATH_ROOTLESS "|" PATH_EMPTY ")" | |
| #define URI_REFERENCE URI "|" RELATIVE_REF | |
| #define RELATIVE_REF RELATIVE_PART "(\\?" QUERY ")?(#" FRAGMENT ")?" | |
| #define RELATIVE_PART "(//" AUTHORITY PATH_ABEMPTY "|" PATH_ABSOLUTE "|" PATH_NOSCHEME "|" PATH_EMPTY ")" | |
| #define SCHEME "[A-Za-z][A-Za-z0-9+.-]*" | |
| #define AUTHORITY "(" USERINFO "@)?" HOST "(:" PORT ")?" | |
| #define USERINFO "(" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS "|:)*" | |
| #define HOST "(" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS ")*" | |
| #define PORT "[0-9]*" | |
| #define PATH_ABEMPTY "(/" SEGMENT ")*" | |
| #define PATH_ABSOLUTE "/(" SEGMENT_NZ "(/" SEGMENT ")*)?" | |
| #define PATH_NOSCHEME SEGMENT_NZ_NC "(/" SEGMENT ")*" | |
| #define PATH_ROOTLESS SEGMENT_NZ "(/" SEGMENT ")*" | |
| #define PATH_EMPTY "()" | |
| #define SEGMENT PCHAR "*" | |
| #define SEGMENT_NZ PCHAR "+" | |
| #define SEGMENT_NZ_NC "(" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS "|@)+" | |
| #define PCHAR "(" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS "|[:@])" | |
| #define QUERY "(" PCHAR "|[/?])*" | |
| #define FRAGMENT "(" PCHAR "|[/?])*" | |
| #define PCT_ENCODED "%[0-9A-Fa-f]{2}" | |
| #define UNRESERVED "[A-Za-z0-9._~-]" | |
| #define SUB_DELIMS "[!$&'()*+,;=]" |
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| /** | |
| * Syntax for a URI as defined in RFC3986. | |
| * | |
| * This syntax does not have IPv6 address support and does not include the IPv4 | |
| * rule because IPv4 addresses happens to be a subset of registered names. | |
| */ | |
| #define URI SCHEME ":" HIER_PART "(?:\\?" QUERY ")?(?:#" FRAGMENT ")?" | |
| #define HIER_PART "(?://" AUTHORITY PATH_ABEMPTY "|" PATH_ABSOLUTE "|" PATH_ROOTLESS "|" PATH_EMPTY ")" | |
| #define SCHEME "(?<scheme>[[:alpha:]][[:alnum:]+.-]*)" | |
| #define AUTHORITY "(?<authority>(?:" USERINFO "@)?" HOST "(?::" PORT ")?)" | |
| #define USERINFO "(?<userinfo>(?:" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS "|:)*)" | |
| #define HOST "(?<host>(?:" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS ")*)" | |
| #define PORT "(?<port>[0-9]*)" | |
| #define PATH_ABEMPTY "(?<path>(?:/" SEGMENT ")*)" | |
| #define PATH_ABSOLUTE "(?<path>/(?:" SEGMENT_NZ "(?:/" SEGMENT ")*)?)" | |
| #define PATH_ROOTLESS "(?<path>" SEGMENT_NZ "(?:/" SEGMENT ")*)" | |
| #define PATH_EMPTY "(?<path>)" | |
| #define SEGMENT PCHAR "*" | |
| #define SEGMENT_NZ PCHAR "+" | |
| #define PCHAR "(?:" UNRESERVED "|" PCT_ENCODED "|" SUB_DELIMS "|[:@])" | |
| #define QUERY "(?<query>(?:" PCHAR "|[/?])*)" | |
| #define FRAGMENT "(?<fragment>(?:" PCHAR "|[/?])*)" | |
| #define PCT_ENCODED "%[[:xdigit:]]{2}" | |
| #define UNRESERVED "[[:alnum:]._~-]" | |
| #define SUB_DELIMS "[!$&'()*+,;=]" |
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Evaluated URI reference:
[A-Za-z][A-Za-z0-9+.-]*:(//(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|:)*@)?([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=])*(:[0-9]*)?(/([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])*)*|/(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])+(/([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])*)*)?|([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])+(/([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])*)*|())(\?(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])|[/?])*)?(#(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])|[/?])*)?|(//(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|:)*@)?([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=])*(:[0-9]*)?(/([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])*)*|/(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])+(/([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])*)*)?|([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|@)+(/([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])*)*|())(\?(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])|[/?])*)?(#(([A-Za-z0-9._~-]|%[0-9A-Fa-f]{2}|[!$&'()*+,;=]|[:@])|[/?])*)?Visualised:
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