javascript 处理 Node.js 套接字数据
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Handling Node.js socket data
提问by Cheruiyot Felix
I have server receiving data from a client [GPS Device]. I have problem presenting the data (i.e the results obtained from the client) in a readable format. Below are the things I have tried.
我有服务器从客户端 [GPS 设备] 接收数据。我在以可读格式呈现数据（即从客户端获得的结果）时遇到问题。以下是我尝试过的事情。
Doing:
正在做：
console.log(data)
I get
我得到
<Buffer d0 d7 3d 00 c4 56 7e 81>
Also tried
也试过
console.log(data.toString())
But I get unwanted results:See below:
但我得到了不需要的结果：见下文：
??A?V~?
Here is my full code:
这是我的完整代码：
var net = require('net');
var fs = require('fs');
var server = net.createServer(function (socket) {
console.log('Server started: Waiting for client connection ...');
console.log('Client connected:port,address: '+socket.remotePort, socket.remoteAddress);
socket.on('data', function (data) {
var date = new Date();
var today = date.getDate()+'_'+date.getMonth();
fs.appendFile(today+'_log.txt', data, function (err) {
if (err) throw err;
console.log(data.toString())
});
});
});
server.listen(my_port, my_ip);
Thanks for your input.
感谢您的输入。
回答by combefis
According to the documentation, you must specify an encoding to get a String instead of a Buffer:
根据文档，您必须指定编码才能获取字符串而不是缓冲区：
Event: 'data'#
Buffer object
Emitted when data is received. The argument data will be a Buffer or String. Encoding of data is set by socket.setEncoding().
You could configure the socket to get the data in UTF-8, for example, with:
您可以配置套接字以获取 UTF-8 格式的数据，例如：
socket.setEncoding('utf8');
回答by Cheruiyot Felix
Assuming the data in buffer is 7 bit ASCII,
假设缓冲区中的数据是 7 位 ASCII，
console.log(data.toString('ascii'))
would resolve the problem.
将解决问题。
