forked from zhurui/management
69 lines
2.3 KiB
JavaScript
69 lines
2.3 KiB
JavaScript
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'use strict';
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const internals = {};
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/*
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From RFC 5321:
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Mailbox = Local-part "@" ( Domain / address-literal )
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Local-part = Dot-string / Quoted-string
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Dot-string = Atom *("." Atom)
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Atom = 1*atext
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atext = ALPHA / DIGIT / "!" / "#" / "$" / "%" / "&" / "'" / "*" / "+" / "-" / "/" / "=" / "?" / "^" / "_" / "`" / "{" / "|" / "}" / "~"
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Domain = sub-domain *("." sub-domain)
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sub-domain = Let-dig [Ldh-str]
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Let-dig = ALPHA / DIGIT
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Ldh-str = *( ALPHA / DIGIT / "-" ) Let-dig
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ALPHA = %x41-5A / %x61-7A ; a-z, A-Z
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DIGIT = %x30-39 ; 0-9
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From RFC 6531:
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sub-domain =/ U-label
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atext =/ UTF8-non-ascii
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UTF8-non-ascii = UTF8-2 / UTF8-3 / UTF8-4
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UTF8-2 = %xC2-DF UTF8-tail
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UTF8-3 = %xE0 %xA0-BF UTF8-tail /
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%xE1-EC 2( UTF8-tail ) /
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%xED %x80-9F UTF8-tail /
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%xEE-EF 2( UTF8-tail )
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UTF8-4 = %xF0 %x90-BF 2( UTF8-tail ) /
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%xF1-F3 3( UTF8-tail ) /
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%xF4 %x80-8F 2( UTF8-tail )
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UTF8-tail = %x80-BF
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Note: The following are not supported:
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RFC 5321: address-literal, Quoted-string
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RFC 5322: obs-*, CFWS
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*/
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internals.atext = '[\\w!#\\$%&\'\\*\\+\\-/=\\?\\^`\\{\\|\\}~]'; // _ included in \w
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exports.atextRx = new RegExp(`^${internals.atext}+$`);
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exports.atomRx = new RegExp([
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internals.atext,
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// %xC2-DF UTF8-tail
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'(?:[\\xc2-\\xdf][\\x80-\\xbf])',
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// %xE0 %xA0-BF UTF8-tail %xE1-EC 2( UTF8-tail ) %xED %x80-9F UTF8-tail %xEE-EF 2( UTF8-tail )
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'(?:\\xe0[\\xa0-\\xbf][\\x80-\\xbf])|(?:[\\xe1-\\xec][\\x80-\\xbf]{2})|(?:\\xed[\\x80-\\x9f][\\x80-\\xbf])|(?:[\\xee-\\xef][\\x80-\\xbf]{2})',
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// %xF0 %x90-BF 2( UTF8-tail ) %xF1-F3 3( UTF8-tail ) %xF4 %x80-8F 2( UTF8-tail )
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'(?:\\xf0[\\x90-\\xbf][\\x80-\\xbf]{2})|(?:[\\xf1-\\xf3][\\x80-\\xbf]{3})|(?:\\xf4[\\x80-\\x8f][\\x80-\\xbf]{2})'
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].join('|'));
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