JavaScript-connect printer with WebSocket via JS for printing problems

Through JS with WebSocket to connect the printer to print, known that the printer port is open by default, through the PHP code

$s = fsockopen("192.168.1.122", 8081,$errno, $errstr, 30); fwrite($s,"abcjiuejseeeeeeeee2222222222ss");

This printing is possible, but through the JS WebSocket connection only print the header information, what is the situation?

The JS code is:

ws = new WebSocket("ws://192.168.1.122:8081/");console.log(ws);ws.onopen = function (e) {    console.log(e);    console.log("连接成功");    ws.send('2222222222222222222222222222');};ws.onclose = function(e) {    console.log("连接关闭");};ws.onerror = function(e) {    console.log("出现错误");};

JS here is not going to Ws.open

Reply content:

Through JS with WebSocket to connect the printer to print, known that the printer port is open by default, through the PHP code

$s = fsockopen("192.168.1.122", 8081,$errno, $errstr, 30); fwrite($s,"abcjiuejseeeeeeeee2222222222ss");

This printing is possible, but through the JS WebSocket connection only print the header information, what is the situation?

The JS code is:

ws = new WebSocket("ws://192.168.1.122:8081/");console.log(ws);ws.onopen = function (e) {    console.log(e);    console.log("连接成功");    ws.send('2222222222222222222222222222');};ws.onclose = function(e) {    console.log("连接关闭");};ws.onerror = function(e) {    console.log("出现错误");};

JS here is not going to Ws.open

$s = fsockopen("192.168.1.122", 8081,$errno, $errstr, 30);

ws = new WebSocket("ws://192.168.10.120:8081/");

Big Brother, have you found any subtle differences?
192.168.1.122
192.168.10.120

WebSocket is based on the need for handshake verification, you can take a look at the TCP protocol three times and WebSocket and PHP socket communication

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