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72 lines
1.7 KiB
TypeScript
72 lines
1.7 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 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 stringify(
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obj: object,
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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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