@versatiles/server/dist/lib/response.js

A server for VersaTiles

import { brotli, gzip, unbrotli, ungzip } from './compressors.js';
import { logImportant } from './log.js';
export class Response {
    #response;
    constructor(response) {
        this.#response = response;
    }
    sendJSONString(json, config) {
        return this.sendContent({
            buffer: Buffer.from(json),
            compression: 'raw',
            mime: 'application/json; charset=utf-8'
        }, config);
    }
    async sendContent(response, config) {
        const mime = response.mime ?? 'application/octet-stream';
        let compression = response.compression ?? 'raw';
        const { acceptGzip, acceptBr, optimalCompression } = config;
        let data = response.buffer;
        switch (compression) {
            case 'br':
                if (acceptBr)
                    break;
                if (optimalCompression && acceptGzip) {
                    data = await gzip(await unbrotli(data));
                    compression = 'gzip';
                    break;
                }
                data = await unbrotli(data);
                compression = 'raw';
                break;
            case 'gzip':
                if (acceptGzip)
                    break;
                if (optimalCompression && acceptBr) {
                    data = await brotli(await ungzip(data));
                    compression = 'br';
                    break;
                }
                data = await ungzip(data);
                compression = 'raw';
                break;
            default: // raw
                if (optimalCompression && acceptBr) {
                    data = await brotli(data);
                    compression = 'br';
                    break;
                }
                if (optimalCompression && acceptGzip) {
                    data = await gzip(data);
                    compression = 'gzip';
                    break;
                }
                compression = 'raw';
                break;
        }
        if (compression !== 'raw')
            this.#response.setHeader('content-encoding', compression);
        this.#response.statusCode = 200;
        this.#response.setHeader('content-type', mime);
        this.#response.end(data);
    }
    sendError(err, code = 500) {
        logImportant(String(err));
        this.#response.statusCode = code;
        this.#response.setHeader('content-type', 'text/plain');
        this.#response.end((typeof err == 'string') ? err : 'internal error');
    }
}