forked from Fediversity/fediversity.eu
208 lines
9.7 KiB
JavaScript
208 lines
9.7 KiB
JavaScript
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'use strict';
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const Assert = require('@hapi/hoek/lib/assert');
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const EscapeRegex = require('@hapi/hoek/lib/escapeRegex');
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const internals = {};
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internals.generate = function () {
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const rfc3986 = {};
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const hexDigit = '\\dA-Fa-f'; // HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
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const hexDigitOnly = '[' + hexDigit + ']';
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const unreserved = '\\w-\\.~'; // unreserved = ALPHA / DIGIT / "-" / "." / "_" / "~"
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const subDelims = '!\\$&\'\\(\\)\\*\\+,;='; // sub-delims = "!" / "$" / "&" / "'" / "(" / ")" / "*" / "+" / "," / ";" / "="
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const pctEncoded = '%' + hexDigit; // pct-encoded = "%" HEXDIG HEXDIG
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const pchar = unreserved + pctEncoded + subDelims + ':@'; // pchar = unreserved / pct-encoded / sub-delims / ":" / "@"
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const pcharOnly = '[' + pchar + ']';
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const decOctect = '(?:0{0,2}\\d|0?[1-9]\\d|1\\d\\d|2[0-4]\\d|25[0-5])'; // dec-octet = DIGIT / %x31-39 DIGIT / "1" 2DIGIT / "2" %x30-34 DIGIT / "25" %x30-35 ; 0-9 / 10-99 / 100-199 / 200-249 / 250-255
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rfc3986.ipv4address = '(?:' + decOctect + '\\.){3}' + decOctect; // IPv4address = dec-octet "." dec-octet "." dec-octet "." dec-octet
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/*
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h16 = 1*4HEXDIG ; 16 bits of address represented in hexadecimal
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ls32 = ( h16 ":" h16 ) / IPv4address ; least-significant 32 bits of address
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IPv6address = 6( h16 ":" ) ls32
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/ "::" 5( h16 ":" ) ls32
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/ [ h16 ] "::" 4( h16 ":" ) ls32
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/ [ *1( h16 ":" ) h16 ] "::" 3( h16 ":" ) ls32
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/ [ *2( h16 ":" ) h16 ] "::" 2( h16 ":" ) ls32
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/ [ *3( h16 ":" ) h16 ] "::" h16 ":" ls32
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/ [ *4( h16 ":" ) h16 ] "::" ls32
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/ [ *5( h16 ":" ) h16 ] "::" h16
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/ [ *6( h16 ":" ) h16 ] "::"
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*/
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const h16 = hexDigitOnly + '{1,4}';
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const ls32 = '(?:' + h16 + ':' + h16 + '|' + rfc3986.ipv4address + ')';
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const IPv6SixHex = '(?:' + h16 + ':){6}' + ls32;
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const IPv6FiveHex = '::(?:' + h16 + ':){5}' + ls32;
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const IPv6FourHex = '(?:' + h16 + ')?::(?:' + h16 + ':){4}' + ls32;
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const IPv6ThreeHex = '(?:(?:' + h16 + ':){0,1}' + h16 + ')?::(?:' + h16 + ':){3}' + ls32;
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const IPv6TwoHex = '(?:(?:' + h16 + ':){0,2}' + h16 + ')?::(?:' + h16 + ':){2}' + ls32;
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const IPv6OneHex = '(?:(?:' + h16 + ':){0,3}' + h16 + ')?::' + h16 + ':' + ls32;
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const IPv6NoneHex = '(?:(?:' + h16 + ':){0,4}' + h16 + ')?::' + ls32;
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const IPv6NoneHex2 = '(?:(?:' + h16 + ':){0,5}' + h16 + ')?::' + h16;
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const IPv6NoneHex3 = '(?:(?:' + h16 + ':){0,6}' + h16 + ')?::';
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rfc3986.ipv4Cidr = '(?:\\d|[1-2]\\d|3[0-2])'; // IPv4 cidr = DIGIT / %x31-32 DIGIT / "3" %x30-32 ; 0-9 / 10-29 / 30-32
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rfc3986.ipv6Cidr = '(?:0{0,2}\\d|0?[1-9]\\d|1[01]\\d|12[0-8])'; // IPv6 cidr = DIGIT / %x31-39 DIGIT / "1" %x0-1 DIGIT / "12" %x0-8; 0-9 / 10-99 / 100-119 / 120-128
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rfc3986.ipv6address = '(?:' + IPv6SixHex + '|' + IPv6FiveHex + '|' + IPv6FourHex + '|' + IPv6ThreeHex + '|' + IPv6TwoHex + '|' + IPv6OneHex + '|' + IPv6NoneHex + '|' + IPv6NoneHex2 + '|' + IPv6NoneHex3 + ')';
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rfc3986.ipvFuture = 'v' + hexDigitOnly + '+\\.[' + unreserved + subDelims + ':]+'; // IPvFuture = "v" 1*HEXDIG "." 1*( unreserved / sub-delims / ":" )
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rfc3986.scheme = '[a-zA-Z][a-zA-Z\\d+-\\.]*'; // scheme = ALPHA *( ALPHA / DIGIT / "+" / "-" / "." )
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rfc3986.schemeRegex = new RegExp(rfc3986.scheme);
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const userinfo = '[' + unreserved + pctEncoded + subDelims + ':]*'; // userinfo = *( unreserved / pct-encoded / sub-delims / ":" )
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const IPLiteral = '\\[(?:' + rfc3986.ipv6address + '|' + rfc3986.ipvFuture + ')\\]'; // IP-literal = "[" ( IPv6address / IPvFuture ) "]"
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const regName = '[' + unreserved + pctEncoded + subDelims + ']{1,255}'; // reg-name = *( unreserved / pct-encoded / sub-delims )
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const host = '(?:' + IPLiteral + '|' + rfc3986.ipv4address + '|' + regName + ')'; // host = IP-literal / IPv4address / reg-name
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const port = '\\d*'; // port = *DIGIT
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const authority = '(?:' + userinfo + '@)?' + host + '(?::' + port + ')?'; // authority = [ userinfo "@" ] host [ ":" port ]
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const authorityCapture = '(?:' + userinfo + '@)?(' + host + ')(?::' + port + ')?';
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/*
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segment = *pchar
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segment-nz = 1*pchar
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path = path-abempty ; begins with "/" '|' is empty
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/ path-absolute ; begins with "/" but not "//"
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/ path-noscheme ; begins with a non-colon segment
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/ path-rootless ; begins with a segment
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/ path-empty ; zero characters
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path-abempty = *( "/" segment )
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path-absolute = "/" [ segment-nz *( "/" segment ) ]
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path-rootless = segment-nz *( "/" segment )
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*/
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const segment = pcharOnly + '*';
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const segmentNz = pcharOnly + '+';
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const segmentNzNc = '[' + unreserved + pctEncoded + subDelims + '@' + ']+';
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const pathEmpty = '';
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const pathAbEmpty = '(?:\\/' + segment + ')*';
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const pathAbsolute = '\\/(?:' + segmentNz + pathAbEmpty + ')?';
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const pathRootless = segmentNz + pathAbEmpty;
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const pathNoScheme = segmentNzNc + pathAbEmpty;
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const pathAbNoAuthority = '(?:\\/\\/\\/' + segment + pathAbEmpty + ')'; // Used by file:///
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// hier-part = "//" authority path
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rfc3986.hierPart = '(?:' + '(?:\\/\\/' + authority + pathAbEmpty + ')' + '|' + pathAbsolute + '|' + pathRootless + '|' + pathAbNoAuthority + ')';
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rfc3986.hierPartCapture = '(?:' + '(?:\\/\\/' + authorityCapture + pathAbEmpty + ')' + '|' + pathAbsolute + '|' + pathRootless + ')';
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// relative-part = "//" authority path-abempty / path-absolute / path-noscheme / path-empty
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rfc3986.relativeRef = '(?:' + '(?:\\/\\/' + authority + pathAbEmpty + ')' + '|' + pathAbsolute + '|' + pathNoScheme + '|' + pathEmpty + ')';
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rfc3986.relativeRefCapture = '(?:' + '(?:\\/\\/' + authorityCapture + pathAbEmpty + ')' + '|' + pathAbsolute + '|' + pathNoScheme + '|' + pathEmpty + ')';
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// query = *( pchar / "/" / "?" )
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// query = *( pchar / "[" / "]" / "/" / "?" )
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rfc3986.query = '[' + pchar + '\\/\\?]*(?=#|$)'; //Finish matching either at the fragment part '|' end of the line.
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rfc3986.queryWithSquareBrackets = '[' + pchar + '\\[\\]\\/\\?]*(?=#|$)';
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// fragment = *( pchar / "/" / "?" )
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rfc3986.fragment = '[' + pchar + '\\/\\?]*';
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return rfc3986;
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};
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internals.rfc3986 = internals.generate();
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exports.ip = {
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v4Cidr: internals.rfc3986.ipv4Cidr,
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v6Cidr: internals.rfc3986.ipv6Cidr,
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ipv4: internals.rfc3986.ipv4address,
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ipv6: internals.rfc3986.ipv6address,
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ipvfuture: internals.rfc3986.ipvFuture
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};
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internals.createRegex = function (options) {
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const rfc = internals.rfc3986;
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// Construct expression
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const query = options.allowQuerySquareBrackets ? rfc.queryWithSquareBrackets : rfc.query;
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const suffix = '(?:\\?' + query + ')?' + '(?:#' + rfc.fragment + ')?';
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// relative-ref = relative-part [ "?" query ] [ "#" fragment ]
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const relative = options.domain ? rfc.relativeRefCapture : rfc.relativeRef;
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if (options.relativeOnly) {
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return internals.wrap(relative + suffix);
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}
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// Custom schemes
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let customScheme = '';
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if (options.scheme) {
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Assert(options.scheme instanceof RegExp || typeof options.scheme === 'string' || Array.isArray(options.scheme), 'scheme must be a RegExp, String, or Array');
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const schemes = [].concat(options.scheme);
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Assert(schemes.length >= 1, 'scheme must have at least 1 scheme specified');
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// Flatten the array into a string to be used to match the schemes
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const selections = [];
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for (let i = 0; i < schemes.length; ++i) {
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const scheme = schemes[i];
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Assert(scheme instanceof RegExp || typeof scheme === 'string', 'scheme at position ' + i + ' must be a RegExp or String');
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if (scheme instanceof RegExp) {
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selections.push(scheme.source.toString());
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}
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else {
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Assert(rfc.schemeRegex.test(scheme), 'scheme at position ' + i + ' must be a valid scheme');
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selections.push(EscapeRegex(scheme));
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}
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}
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customScheme = selections.join('|');
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}
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// URI = scheme ":" hier-part [ "?" query ] [ "#" fragment ]
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const scheme = customScheme ? '(?:' + customScheme + ')' : rfc.scheme;
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const absolute = '(?:' + scheme + ':' + (options.domain ? rfc.hierPartCapture : rfc.hierPart) + ')';
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const prefix = options.allowRelative ? '(?:' + absolute + '|' + relative + ')' : absolute;
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return internals.wrap(prefix + suffix, customScheme);
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};
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internals.wrap = function (raw, scheme) {
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raw = `(?=.)(?!https?\:/(?:$|[^/]))(?!https?\:///)(?!https?\:[^/])${raw}`; // Require at least one character and explicitly forbid 'http:/' or HTTP with empty domain
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return {
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raw,
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regex: new RegExp(`^${raw}$`),
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scheme
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};
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};
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internals.uriRegex = internals.createRegex({});
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exports.regex = function (options = {}) {
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if (options.scheme ||
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options.allowRelative ||
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options.relativeOnly ||
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options.allowQuerySquareBrackets ||
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options.domain) {
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return internals.createRegex(options);
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}
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return internals.uriRegex;
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};
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