尝试将 Websocket 提供的 json 数据中的值打印到控制台日志
下面的代码将所有 json 数据从 websocket 打印到控制台日志。
// require ws
const WebSocket = require('ws');
//messsage sent to ws server
var msg =
{"jsonrpc": "2.0",
"method": "public/subscribe",
"id": 42,
"params": {
"channels": ["price_index.btc_usd"]}
};
// WS connection url
var ws = new WebSocket('wss://website.com/ws/api/v2');
//ws response
ws.onmessage = function (e) {
// do something with the notifications...
console.log('server : ', e.data);
};
//stringify json data
ws.onopen = function () {
ws.send(JSON.stringify(msg));
};
预期结果:
server : 5457.21
server : 5457.19
server : 5457.15
实际结果:
server : {"jsonrpc":"2.0","method":"subscription","params":{"channel":"deribit_price_index.btc_usd","data":{"timestamp":1556209117657,"price":5457.21,"index_name":"btc_usd"}}}
server : {"jsonrpc":"2.0","method":"subscription","params":{"channel":"deribit_price_index.btc_usd","data":{"timestamp":1556209117657,"price":5457.19,"index_name":"btc_usd"}}}
最佳答案
JSON.parse()
这是你如何使用它:
//This will turn it into an object you can navigate with '.params.data.price'
try {
console.log('server: ', JSON.parse(e.data).params.data.price);
} catch {}
关于javascript - 从 websocket 过滤 json 对象/值并打印到控制台日志,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55854147/