"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var regex_lib_1 = require("../regex-lib");
/**
* @private
* @class Autolinker.matcher.UrlMatchValidator
* @singleton
*
* Used by Autolinker to filter out false URL positives from the
* {@link Autolinker.matcher.Url UrlMatcher}.
*
* Due to the limitations of regular expressions (including the missing feature
* of look-behinds in JS regular expressions), we cannot always determine the
* validity of a given match. This class applies a bit of additional logic to
* filter out any false positives that have been matched by the
* {@link Autolinker.matcher.Url UrlMatcher}.
*/
var UrlMatchValidator = (function () {
function UrlMatchValidator() {
}
/**
* Determines if a given URL match found by the {@link Autolinker.matcher.Url UrlMatcher}
* is valid. Will return `false` for:
*
* 1) URL matches which do not have at least have one period ('.') in the
* domain name (effectively skipping over matches like "abc:def").
* However, URL matches with a protocol will be allowed (ex: 'http://localhost')
* 2) URL matches which do not have at least one word character in the
* domain name (effectively skipping over matches like "git:1.0").
* 3) A protocol-relative url match (a URL beginning with '//') whose
* previous character is a word character (effectively skipping over
* strings like "abc//google.com")
*
* Otherwise, returns `true`.
*
* @param {String} urlMatch The matched URL, if there was one. Will be an
* empty string if the match is not a URL match.
* @param {String} protocolUrlMatch The match URL string for a protocol
* match. Ex: 'http://yahoo.com'. This is used to match something like
* 'http://localhost', where we won't double check that the domain name
* has at least one '.' in it.
* @return {Boolean} `true` if the match given is valid and should be
* processed, or `false` if the match is invalid and/or should just not be
* processed.
*/
UrlMatchValidator.isValid = function (urlMatch, protocolUrlMatch) {
if ((protocolUrlMatch && !this.isValidUriScheme(protocolUrlMatch)) ||
this.urlMatchDoesNotHaveProtocolOrDot(urlMatch, protocolUrlMatch) || // At least one period ('.') must exist in the URL match for us to consider it an actual URL, *unless* it was a full protocol match (like 'http://localhost')
(this.urlMatchDoesNotHaveAtLeastOneWordChar(urlMatch, protocolUrlMatch) && // At least one letter character must exist in the domain name after a protocol match. Ex: skip over something like "git:1.0"
!this.isValidIpAddress(urlMatch)) || // Except if it's an IP address
this.containsMultipleDots(urlMatch)) {
return false;
}
return true;
};
UrlMatchValidator.isValidIpAddress = function (uriSchemeMatch) {
var newRegex = new RegExp(this.hasFullProtocolRegex.source + this.ipRegex.source);
var uriScheme = uriSchemeMatch.match(newRegex);
return uriScheme !== null;
};
UrlMatchValidator.containsMultipleDots = function (urlMatch) {
var stringBeforeSlash = urlMatch;
if (this.hasFullProtocolRegex.test(urlMatch)) {
stringBeforeSlash = urlMatch.split('://')[1];
}
return stringBeforeSlash.split('/')[0].indexOf("..") > -1;
};
/**
* Determines if the URI scheme is a valid scheme to be autolinked. Returns
* `false` if the scheme is 'javascript:' or 'vbscript:'
*
* @private
* @param {String} uriSchemeMatch The match URL string for a full URI scheme
* match. Ex: 'http://yahoo.com' or 'mailto:a@a.com'.
* @return {Boolean} `true` if the scheme is a valid one, `false` otherwise.
*/
UrlMatchValidator.isValidUriScheme = function (uriSchemeMatch) {
var uriSchemeMatchArr = uriSchemeMatch.match(this.uriSchemeRegex), uriScheme = uriSchemeMatchArr && uriSchemeMatchArr[0].toLowerCase();
return (uriScheme !== 'javascript:' && uriScheme !== 'vbscript:');
};
/**
* Determines if a URL match does not have either:
*
* a) a full protocol (i.e. 'http://'), or
* b) at least one dot ('.') in the domain name (for a non-full-protocol
* match).
*
* Either situation is considered an invalid URL (ex: 'git:d' does not have
* either the '://' part, or at least one dot in the domain name. If the
* match was 'git:abc.com', we would consider this valid.)
*
* @private
* @param {String} urlMatch The matched URL, if there was one. Will be an
* empty string if the match is not a URL match.
* @param {String} protocolUrlMatch The match URL string for a protocol
* match. Ex: 'http://yahoo.com'. This is used to match something like
* 'http://localhost', where we won't double check that the domain name
* has at least one '.' in it.
* @return {Boolean} `true` if the URL match does not have a full protocol,
* or at least one dot ('.') in a non-full-protocol match.
*/
UrlMatchValidator.urlMatchDoesNotHaveProtocolOrDot = function (urlMatch, protocolUrlMatch) {
return (!!urlMatch && (!protocolUrlMatch || !this.hasFullProtocolRegex.test(protocolUrlMatch)) && urlMatch.indexOf('.') === -1);
};
/**
* Determines if a URL match does not have at least one word character after
* the protocol (i.e. in the domain name).
*
* At least one letter character must exist in the domain name after a
* protocol match. Ex: skip over something like "git:1.0"
*
* @private
* @param {String} urlMatch The matched URL, if there was one. Will be an
* empty string if the match is not a URL match.
* @param {String} protocolUrlMatch The match URL string for a protocol
* match. Ex: 'http://yahoo.com'. This is used to know whether or not we
* have a protocol in the URL string, in order to check for a word
* character after the protocol separator (':').
* @return {Boolean} `true` if the URL match does not have at least one word
* character in it after the protocol, `false` otherwise.
*/
UrlMatchValidator.urlMatchDoesNotHaveAtLeastOneWordChar = function (urlMatch, protocolUrlMatch) {
if (urlMatch && protocolUrlMatch) {
return !this.hasWordCharAfterProtocolRegex.test(urlMatch);
}
else {
return false;
}
};
/**
* Regex to test for a full protocol, with the two trailing slashes. Ex: 'http://'
*
* @private
* @property {RegExp} hasFullProtocolRegex
*/
UrlMatchValidator.hasFullProtocolRegex = /^[A-Za-z][-.+A-Za-z0-9]*:\/\//;
/**
* Regex to find the URI scheme, such as 'mailto:'.
*
* This is used to filter out 'javascript:' and 'vbscript:' schemes.
*
* @private
* @property {RegExp} uriSchemeRegex
*/
UrlMatchValidator.uriSchemeRegex = /^[A-Za-z][-.+A-Za-z0-9]*:/;
/**
* Regex to determine if at least one word char exists after the protocol (i.e. after the ':')
*
* @private
* @property {RegExp} hasWordCharAfterProtocolRegex
*/
UrlMatchValidator.hasWordCharAfterProtocolRegex = new RegExp(":[^\\s]*?[" + regex_lib_1.alphaCharsStr + "]");
/**
* Regex to determine if the string is a valid IP address
*
* @private
* @property {RegExp} ipRegex
*/
UrlMatchValidator.ipRegex = /[0-9][0-9]?[0-9]?\.[0-9][0-9]?[0-9]?\.[0-9][0-9]?[0-9]?\.[0-9][0-9]?[0-9]?(:[0-9]*)?\/?$/;
return UrlMatchValidator;
}());
exports.UrlMatchValidator = UrlMatchValidator;
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