structured-headers/dist/util.js

Implementation of Structured Field Values for HTTP (RFC9651, RFC8941)

const asciiRe = /^[\x20-\x7E]*$/;
const tokenRe = /^[a-zA-Z*][:/!#$%&'*+\-.^_`|~A-Za-z0-9]*$/;
const keyRe = /^[a-z*][*\-_.a-z0-9]*$/;
export function isAscii(str) {
    return asciiRe.test(str);
}
export function isValidTokenStr(str) {
    return tokenRe.test(str);
}
export function isValidKeyStr(str) {
    return keyRe.test(str);
}
export function isInnerList(input) {
    return Array.isArray(input[0]);
}
export function arrayBufferToBase64(ab) {
    // Create a Uint8Array to read the ArrayBuffer as bytes
    const bytes = new Uint8Array(ab);
    let binary = '';
    // Convert each byte to a character
    for (const byte of bytes) {
        binary += String.fromCharCode(byte);
    }
    // Encode the binary string as Base64
    return btoa(binary);
}
export function base64ToArrayBuffer(b64) {
    // Decode the base64 string into a binary string
    const binaryString = atob(b64);
    // Create a new ArrayBuffer with the same length as the binary string
    const len = binaryString.length;
    const bytes = new Uint8Array(len);
    // Convert each character to its corresponding byte
    for (let i = 0; i < len; i++) {
        bytes[i] = binaryString.charCodeAt(i);
    }
    // Return the ArrayBuffer
    return bytes.buffer;
}
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