mirror of https://github.com/denoland/deno.git
137 lines
3.5 KiB
TypeScript
137 lines
3.5 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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interface ParseOptions {
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decodeURIComponent?: (string: string) => string;
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maxKeys?: number;
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}
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export const hexTable = new Array(256);
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for (let i = 0; i < 256; ++i) {
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hexTable[i] = "%" + ((i < 16 ? "0" : "") + i.toString(16)).toUpperCase();
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}
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export function parse(
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str: string,
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sep = "&",
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eq = "=",
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{ decodeURIComponent = unescape, maxKeys = 1000 }: ParseOptions = {},
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): { [key: string]: string[] | string } {
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const entries = str
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.split(sep)
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.map((entry) => entry.split(eq).map(decodeURIComponent));
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const final: { [key: string]: string[] | string } = {};
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let i = 0;
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while (true) {
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if ((Object.keys(final).length === maxKeys && !!maxKeys) || !entries[i]) {
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break;
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}
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const [key, val] = entries[i];
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if (final[key]) {
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if (Array.isArray(final[key])) {
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(final[key] as string[]).push(val);
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} else {
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final[key] = [final[key] as string, val];
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}
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} else {
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final[key] = val;
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}
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i++;
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}
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return final;
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}
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interface StringifyOptions {
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encodeURIComponent?: (string: string) => string;
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}
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export function encodeStr(
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str: string,
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noEscapeTable: number[],
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hexTable: string[],
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): string {
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const len = str.length;
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if (len === 0) return "";
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let out = "";
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let lastPos = 0;
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for (let i = 0; i < len; i++) {
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let c = str.charCodeAt(i);
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// ASCII
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if (c < 0x80) {
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if (noEscapeTable[c] === 1) continue;
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if (lastPos < i) out += str.slice(lastPos, i);
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lastPos = i + 1;
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out += hexTable[c];
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continue;
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}
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if (lastPos < i) out += str.slice(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)] + 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) throw new Deno.errors.InvalidData("invalid URI");
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const c2 = str.charCodeAt(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) return str;
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if (lastPos < len) return out + str.slice(lastPos);
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return out;
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}
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export function stringify(
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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obj: Record<string, any>,
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sep = "&",
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eq = "=",
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{ encodeURIComponent = escape }: StringifyOptions = {},
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): string {
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const final = [];
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for (const entry of Object.entries(obj)) {
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if (Array.isArray(entry[1])) {
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for (const val of entry[1]) {
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final.push(encodeURIComponent(entry[0]) + eq + encodeURIComponent(val));
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}
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} else if (typeof entry[1] !== "object" && entry[1] !== undefined) {
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final.push(entry.map(encodeURIComponent).join(eq));
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} else {
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final.push(encodeURIComponent(entry[0]) + eq);
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}
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}
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return final.join(sep);
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}
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export const decode = parse;
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export const encode = stringify;
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export const unescape = decodeURIComponent;
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export const escape = encodeURIComponent;
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