我在我的服务器中实现了 nexmo 提供的示例代码(如下)。然而,我遇到了一个问题,如果两个调用者 ping 我的服务器,第二个调用者的二进制数据也会流入同一个 websocket 端点;从而导致两个二进制流进入同一个 websocket 端点。我如何实现 nexmo,以便每个调用者都有自己的 websocket 来连接到代理?我相信 socket.io 是解决方案,但我对它不熟悉。
const express = require('express')
const app = express()
var bodyParser = require('body-parser');
app.use(bodyParser.json());
var expressWs = require('express-ws')(app);
var isBuffer = require('is-buffer')
var header = require("waveheader");
var fs = require('fs');
var file;
//Serve a Main Page
app.get('/', function(req, res) {
res.send("Node Websocket");
});
//Serve the NCCO on the /ncco answer URL
app.get('/ncco', function(req, res) {
var ncco = require('./ncco.json');
res.writeHead(200, { 'Content-Type': 'application/json' });
res.end(JSON.stringify(ncco), 'utf-8');
});
//Log the Events
app.post('/event', function(req, res) {
console.log(req.body);
res.send("ok");
});
// Handle the Websocket
app.ws('/socket', function(ws, req) {
var rawarray = [];
console.log("Websocket Connected")
ws.on('message', function(msg) {
if (isBuffer(msg)) {
rawarray.push(msg);
}
else {
console.log(msg);
}
});
ws.on('close', function(){
console.log("Websocket Closed")
file = fs.createWriteStream('./output.wav');
file.write(header(16000 * rawarray.length/50 * 2,{
sampleRate: 16000,
channels: 1,
bitDepth: 16}));
rawarray.forEach(function(data){
file.write(data);
});
})
});
app.listen(8000, () => console.log('App listening on port 8000!'))
最佳答案
它应该适用于您当前的实现,您需要做一些更改。因此,您需要在单独的路由上流式传输每个 WebSocket,并将每个输出保存到不同的文件,而不是每个 WebSocket 都进入同一端点并写入同一输出文件。将套接字路由更改为如下所示:
app.ws('/socket/:identifier', function(ws, req) {
var rawarray = [];
console.log("Websocket Connected")
ws.on('message', function(msg) {
if (isBuffer(msg)) {
rawarray.push(msg);
}
else {
console.log(msg);
}
});
ws.on('close', function(){
console.log("Websocket Closed")
file = fs.createWriteStream('./' + req.params.identifier + '.wav');
file.write(header(16000 * rawarray.length/50 * 2,{
sampleRate: 16000,
channels: 1,
bitDepth: 16}));
rawarray.forEach(function(data){
file.write(data);
});
})
});
要实现此功能,您还需要更改 NCCO,而不是从磁盘读取静态文件,而是在 route 生成它。我不知道文件中到底有什么,但您可以按原样使用它并将套接字连接位更改为类似以下内容:
app.get('/ncco', function(req, res) {
var ncco = [
{
"action": "talk",
"text": "Please wait while we connect you"
},
{
"action": "connect",
"eventUrl": [
"https://yourserver.com/event"
],
"from": "YOUR_NEXMO_NUMBER",
"endpoint": [
{
"type": "websocket",
"uri": "ws://yourserver.com/socket/" + req.query.from,
"content-type": "audio/l16;rate=16000"
}
]
}
]
res.writeHead(200, { 'Content-Type': 'application/json' });
res.end(JSON.stringify(ncco), 'utf-8');
});
关于javascript - 如何使用 Nexmo 建立多个 WebSocket 连接,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59638768/