mirror of https://github.com/nodejs/node.git
120 lines
3.2 KiB
JavaScript
120 lines
3.2 KiB
JavaScript
'use strict';
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const {
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Array,
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Int8Array,
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NumberPrototypeToString,
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StringPrototypeCharCodeAt,
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StringPrototypeSlice,
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StringPrototypeToUpperCase,
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} = primordials;
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const { ERR_INVALID_URI } = require('internal/errors').codes;
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const hexTable = new Array(256);
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for (let i = 0; i < 256; ++i)
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hexTable[i] = '%' +
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StringPrototypeToUpperCase((i < 16 ? '0' : '') +
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NumberPrototypeToString(i, 16));
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const isHexTable = new Int8Array([
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 32 - 47
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
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0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 64 - 79
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80 - 95
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0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 96 - 111
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 112 - 127
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 128 ...
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // ... 256
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]);
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/**
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* @param {string} str
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* @param {Int8Array} noEscapeTable
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* @param {string[]} hexTable
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* @returns {string}
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*/
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function encodeStr(str, noEscapeTable, hexTable) {
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const len = str.length;
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if (len === 0)
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return '';
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let out = '';
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let lastPos = 0;
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let i = 0;
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outer:
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for (; i < len; i++) {
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let c = StringPrototypeCharCodeAt(str, i);
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// ASCII
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while (c < 0x80) {
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if (noEscapeTable[c] !== 1) {
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if (lastPos < i)
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out += StringPrototypeSlice(str, lastPos, i);
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lastPos = i + 1;
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out += hexTable[c];
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}
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if (++i === len)
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break outer;
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c = StringPrototypeCharCodeAt(str, i);
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}
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if (lastPos < i)
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out += StringPrototypeSlice(str, lastPos, i);
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// Multi-byte characters ...
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if (c < 0x800) {
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lastPos = i + 1;
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out += hexTable[0xC0 | (c >> 6)] +
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hexTable[0x80 | (c & 0x3F)];
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continue;
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}
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if (c < 0xD800 || c >= 0xE000) {
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lastPos = i + 1;
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out += hexTable[0xE0 | (c >> 12)] +
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hexTable[0x80 | ((c >> 6) & 0x3F)] +
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hexTable[0x80 | (c & 0x3F)];
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continue;
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}
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// Surrogate pair
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++i;
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// This branch should never happen because all URLSearchParams entries
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// should already be converted to USVString. But, included for
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// completion's sake anyway.
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if (i >= len)
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throw new ERR_INVALID_URI();
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const c2 = StringPrototypeCharCodeAt(str, i) & 0x3FF;
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lastPos = i + 1;
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c = 0x10000 + (((c & 0x3FF) << 10) | c2);
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out += hexTable[0xF0 | (c >> 18)] +
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hexTable[0x80 | ((c >> 12) & 0x3F)] +
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hexTable[0x80 | ((c >> 6) & 0x3F)] +
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hexTable[0x80 | (c & 0x3F)];
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}
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if (lastPos === 0)
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return str;
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if (lastPos < len)
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return out + StringPrototypeSlice(str, lastPos);
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return out;
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}
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module.exports = {
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encodeStr,
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hexTable,
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isHexTable,
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};
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