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32 lines
1.3 KiB
CoffeeScript
32 lines
1.3 KiB
CoffeeScript
RegExpUtils =
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# It's important that the regex be wrapped in parens, otherwise
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# javascript's RegExp::exec method won't find anything even when the
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# regex matches!
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#
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# It's also imporant we return a fresh copy of the RegExp every time. A
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# javascript regex is stateful and multiple functions using this method
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# will cause unexpected behavior!
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#
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# See http://tools.ietf.org/html/rfc5322#section-3.4 and
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# https://tools.ietf.org/html/rfc6531 and
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# https://en.wikipedia.org/wiki/Email_address#Local_part
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emailRegex: -> new RegExp(/([a-z.A-Z0-9%#_~$&*+;=:-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,63})/g)
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# https://regex101.com/r/zG7aW4/3
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imageTagRegex: -> /<img\s+[^>]*src="([^"]*)"[^>]*>/g
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# This tests for valid schemes as per RFC 3986
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# We need both http: https: and mailto: and a variety of other schemes.
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# This does not check for invalid usage of the http: scheme. For
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# example, http:bad.com would pass. We do not check for
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# protocol-relative uri's.
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#
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# Regex explanation here: https://regex101.com/r/nR2yL6/2
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# See RFC here: https://tools.ietf.org/html/rfc3986#section-3.1
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# SO discussion: http://stackoverflow.com/questions/10687099/how-to-test-if-a-url-string-is-absolute-or-relative/31991870#31991870
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hasValidSchemeRegex: -> new RegExp('^[a-z][a-z0-9+.-]*:', 'i')
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looseStyleTag: -> /<style/gim
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module.exports = RegExpUtils
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