我正在尝试将图像数据从我的 TCP 客户端发送到我的 TCP 服务器,这两个都是用 node.js 编写的
我已经试过了
客户:
function onData(socket, data) {
var data = Buffer.from(data).toString()
var arg = data.split(',')
var event = arg[0]
console.log(event)
if (event == 'screenshot') {
console.log(hostname)
console.log('control client uid ' + arg[1] + 'then we screenshot')
screenshot()
.then(img => {
console.log(img)
socket.write('screenshotData,' + ',' + hostname + ',' + img)
socket.write('stdout,' + arg[2] + ',Screenshot')
})
.catch(err => {
console.log(err)
socket.write('error', err)
})
}
}
服务器:
sock.on('data', function(data) {
//right here i need to parse the first 'EVENT' part of the text so i can get cusotom tcp events and
var data = Buffer.from(data).toString()
var arg = data.split(',')
var event = arg[0]
if (event == 'screenshotData') {
agentName = arg[1]
img = arg[2]
console.log('agent-name ' + agentName)
console.log('screnshotdata' + img)
var dt = dateTime.create()
var formattedTime = dt.format('Y-m-d-H-M-S')
var folder = 'adminPanel/screenshots/'
var filename = formattedTime + '-' + agentName + '.png'
console.log(filename)
fs.writeFile(folder + filename, img, function(err) {
console.log(err)
})
}
})
我必须在 TCP 中构建一些基本的事件系统。如果您知道更好的方法,请告诉我。无论如何,客户端截取屏幕截图,然后执行 socket.write('screenshotData', + ',' + hostname + ',' img)
。
但它会以多个 block 的形式发送数据,因为我的控制台多次将随机乱码显示为新事件,所以我什至不知道该怎么做。任何帮助都会很棒。
最佳答案
除了混合编码(您的图像 Buffer
只是连接到字符串中)之外,您还将 TCP 流视为面向消息的协议(protocol)。
我建议您使用 websockets 切换 TCP 流.界面基本保持不变(read
替换为 message
事件,诸如此类),但它的实际行为与您预期的一样。
工作服务器:
const WebSocket = require('ws');
const fs = require('fs');
const PORT = 3000;
const handleMessage = (data) => {
const [action, payload] = data.split(',');
const imageData = Buffer.from(payload, 'base64');
const imageHandle = fs.createWriteStream('screenshot.jpg');
imageHandle.write(imageData);
imageHandle.end();
console.log(`Saved screenshot (${imageData.length} bytes)`);
};
const wss = new WebSocket.Server({port: PORT});
wss.on('connection', (ws) => {
console.log('Opened client');
ws.on('message', (data)=>handleMessage(data));
});
console.log('Server started');
客户:
const WebSocket = require('ws');
const screenshot = require('screenshot-desktop');
const PORT = 3000;
const sendImage = ( client, image ) => {
const payload = image.toString('base64');
const message = ["screenshot", payload].join(',');
console.log(`Sending ${image.length} bytes in message ${message.length} bytes`);
client.send(
message,
() => {
console.log('Done');
process.exit(0);
}
);
};
const client = new WebSocket('ws://localhost:'+PORT+'/');
client.on('open', () => {
console.log('Connected');
screenshot().then( image => sendImage(client, image) );
});
关于javascript - 将图像缓冲区发送到 node.js tcp 服务器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/57516018/