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60 lines
1.5 KiB
60 lines
1.5 KiB
/*! |
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* encodeurl |
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* Copyright(c) 2016 Douglas Christopher Wilson |
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* MIT Licensed |
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*/ |
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'use strict' |
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/** |
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* Module exports. |
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* @public |
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*/ |
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module.exports = encodeUrl |
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/** |
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* RegExp to match non-URL code points, *after* encoding (i.e. not including "%") |
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* and including invalid escape sequences. |
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* @private |
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*/ |
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var ENCODE_CHARS_REGEXP = /(?:[^\x21\x25\x26-\x3B\x3D\x3F-\x5B\x5D\x5F\x61-\x7A\x7E]|%(?:[^0-9A-Fa-f]|[0-9A-Fa-f][^0-9A-Fa-f]|$))+/g |
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/** |
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* RegExp to match unmatched surrogate pair. |
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* @private |
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*/ |
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var UNMATCHED_SURROGATE_PAIR_REGEXP = /(^|[^\uD800-\uDBFF])[\uDC00-\uDFFF]|[\uD800-\uDBFF]([^\uDC00-\uDFFF]|$)/g |
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/** |
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* String to replace unmatched surrogate pair with. |
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* @private |
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*/ |
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var UNMATCHED_SURROGATE_PAIR_REPLACE = '$1\uFFFD$2' |
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/** |
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* Encode a URL to a percent-encoded form, excluding already-encoded sequences. |
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* |
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* This function will take an already-encoded URL and encode all the non-URL |
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* code points. This function will not encode the "%" character unless it is |
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* not part of a valid sequence (`%20` will be left as-is, but `%foo` will |
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* be encoded as `%25foo`). |
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* |
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* This encode is meant to be "safe" and does not throw errors. It will try as |
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* hard as it can to properly encode the given URL, including replacing any raw, |
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* unpaired surrogate pairs with the Unicode replacement character prior to |
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* encoding. |
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* |
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* @param {string} url |
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* @return {string} |
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* @public |
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*/ |
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function encodeUrl (url) { |
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return String(url) |
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.replace(UNMATCHED_SURROGATE_PAIR_REGEXP, UNMATCHED_SURROGATE_PAIR_REPLACE) |
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.replace(ENCODE_CHARS_REGEXP, encodeURI) |
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}
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