67 lines
2.7 KiB
JavaScript
67 lines
2.7 KiB
JavaScript
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.canonicalize = exports.canonicalize_quoted_string = exports.normalize = exports.normalize_dot_string = exports.parse = void 0;
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// const punycode = require('punycode');
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const nearley = require("nearley");
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const grammar_1 = __importDefault(require("./grammar"));
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grammar_1.default.ParserStart = "Mailbox";
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const grammar = nearley.Grammar.fromCompiled(grammar_1.default);
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// <https://tools.ietf.org/html/rfc5321#section-4.1.2>
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function parse(address) {
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const parser = new nearley.Parser(grammar);
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parser.feed(address);
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if (parser.results.length !== 1) {
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throw new Error("address parsing failed: ambiguous grammar");
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}
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return parser.results[0];
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}
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exports.parse = parse;
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/** Strip +something, strip '.'s, and map to lower case.
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*/
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function normalize_dot_string(dot_string) {
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const tagless = (function () {
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const plus_loc = dot_string.indexOf("+");
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if (plus_loc === -1) {
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return dot_string;
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}
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return dot_string.substr(0, plus_loc);
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})();
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const dotless = tagless.replace(/\./g, "");
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return dotless.toLowerCase();
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}
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exports.normalize_dot_string = normalize_dot_string;
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/** The G style address normalization.
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*/
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function normalize(address) {
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var _a, _b;
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const a = parse(address);
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const domain = (_a = a.domainPart.AddressLiteral) !== null && _a !== void 0 ? _a : a.domainPart.DomainName.toLowerCase();
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const local = (_b = a.localPart.QuotedString) !== null && _b !== void 0 ? _b : normalize_dot_string(a.localPart.DotString);
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return `${local}@${domain}`;
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}
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exports.normalize = normalize;
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function canonicalize_quoted_string(quoted_string) {
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const unquoted = quoted_string.substr(1).substr(0, quoted_string.length - 2);
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const unescaped = unquoted.replace(/(?:\\(.))/g, "$1");
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const reescaped = unescaped.replace(/(?:(["\\]))/g, "\\$1");
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return `"${reescaped}"`; // re-quote
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}
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exports.canonicalize_quoted_string = canonicalize_quoted_string;
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/**
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* Apply a canonicalization consistent with standards to support
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* comparison as a string.
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*/
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function canonicalize(address) {
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var _a;
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const a = parse(address);
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const domain = (_a = a.domainPart.AddressLiteral) !== null && _a !== void 0 ? _a : a.domainPart.DomainName.toLowerCase();
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const local = a.localPart.QuotedString
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? canonicalize_quoted_string(a.localPart.QuotedString)
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: a.localPart.DotString;
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return `${local}@${domain}`;
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}
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exports.canonicalize = canonicalize;
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//# sourceMappingURL=index.js.map
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