@versatiles/google-cloud/dist/lib/response_headers.js

A server for VersaTiles in Google Cloud Run

import { parseContentEncoding } from './encoding.js';
import { readFileSync } from 'fs';
const { version } = JSON.parse(readFileSync(new URL('../../package.json', import.meta.url), 'utf8'));
export class ResponseHeaders {
    #locked = false;
    #headers = {
        'server': 'versatiles-google-cloud v' + version,
        'cache-control': 'max-age=86400', // Set default cache control header (1 day)
    };
    constructor(headers) {
        if (headers) {
            Object.entries(headers).forEach(([key, value]) => this.#headers[key] = value);
        }
    }
    get(key) {
        const value = this.#headers[key];
        return (value === undefined) ? undefined : String(value);
    }
    set(key, value) {
        if (this.#locked)
            throw Error('Headers are locked. Probably because they have already been sent.');
        this.#headers[key] = value;
        return this;
    }
    remove(key) {
        if (this.#locked)
            throw Error('Headers are locked. Probably because they have already been sent.');
        delete this.#headers[key];
        return this;
    }
    toString() {
        return JSON.stringify(this.#headers);
    }
    getHeaders() {
        return this.#headers;
    }
    getContentEncoding() {
        return parseContentEncoding(this.#headers['content-encoding']);
    }
    lock() {
        this.#locked = true;
        return this;
    }
    getMediaType() {
        return String(this.#headers['content-type'] ?? '').replace(/\/.*/, '').toLowerCase();
    }
}