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[英]Javascript/NodeJS equivalent code for the Java code Cipher.doFinal(byte[])?
[英]equivalent nodejs code for this java code
我遇到了这个Java代码,链接: java套接字发送和接收字节数组
Socket socket = ...
DataInputStream dIn = new DataInputStream(socket.getInputStream());
int length = dIn.readInt(); // read length of incoming message
if(length>0) {
byte[] message = new byte[length];
dIn.readFully(message, 0, message.length); // read the message
}
我只是想知道他们是否在node.js中是等效的代码?
只需从套接字读取 4个字节,然后将其转换为32位带符号的big endian整数 ,然后再读取更多字节:
function readLength(cb) {
var length = socket.read(4);
if (length === null)
socket.once('readable', function() { readLength(cb); });
else
cb(length.readInt32BE(0, true));
}
function readMessage(cb) {
readLength(function retry(len) {
var message = socket.read(len);
if (message === null)
socket.once('readable', function() { retry(len); });
else
cb(message);
});
}
// ...
readMessage(function(msg) {
// `msg` is a Buffer containing your message
});
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