50 lines
1.3 KiB
JavaScript
50 lines
1.3 KiB
JavaScript
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'use strict';
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const { browser } = require('./util/Constants');
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let erlpack;
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try {
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erlpack = require('erlpack');
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if (!erlpack.pack) erlpack = null;
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} catch {} // eslint-disable-line no-empty
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let TextDecoder;
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if (browser) {
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TextDecoder = window.TextDecoder; // eslint-disable-line no-undef
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exports.WebSocket = window.WebSocket; // eslint-disable-line no-undef
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} else {
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TextDecoder = require('util').TextDecoder;
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exports.WebSocket = require('ws');
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}
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const ab = new TextDecoder();
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exports.encoding = erlpack ? 'etf' : 'json';
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exports.pack = erlpack ? erlpack.pack : JSON.stringify;
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exports.unpack = (data, type) => {
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if (exports.encoding === 'json' || type === 'json') {
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if (typeof data !== 'string') {
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data = ab.decode(data);
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}
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return JSON.parse(data);
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}
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if (!Buffer.isBuffer(data)) data = Buffer.from(new Uint8Array(data));
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return erlpack.unpack(data);
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};
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exports.create = (gateway, query = {}, ...args) => {
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const [g, q] = gateway.split('?');
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query.encoding = exports.encoding;
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query = new URLSearchParams(query);
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if (q) new URLSearchParams(q).forEach((v, k) => query.set(k, v));
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const ws = new exports.WebSocket(`${g}?${query}`, ...args);
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if (browser) ws.binaryType = 'arraybuffer';
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return ws;
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};
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for (const state of ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED']) exports[state] = exports.WebSocket[state];
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