@fastly/esi/build/util.js

ESI implementation for JavaScript, using the modern fetch and streaming APIs.

/*
 * Copyright Fastly, Inc.
 * Licensed under the MIT license. See LICENSE file for details.
 */
export function quoteString(input) {
    return "'" + input.replaceAll("'", "\\'") + "'";
}
export function unquoteString(input) {
    if (!input.startsWith("'") || !input.endsWith("'")) {
        throw new Error('unquoteString input should start and end with single quote');
    }
    let str = input.slice(1, input.length - 1);
    let p = -1;
    while (true) {
        p = str.indexOf("'", p + 1);
        if (p === -1) {
            break;
        }
        if (str.charAt(p - 1) !== '\\') {
            throw new Error('unquoteString input should not contain unescaped single quotes');
        }
    }
    return input.slice(1, -1).replaceAll("\\'", "'");
}