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Websocket and arraybuffer

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dennis_uniwin:
Hello,

I started with the websocket demo and I am trying to make a websocket connection to our own software.
So I have made sure that the websocket is created in the following way:

--- Code: Pascal  [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---        URL:='ws://'+aHost+':5001/ws/';    end;  try    WS:=TJSWebsocket.New(url,'csr');    ws.binaryType:='arraybuffer';    WS.onopen:=@DoOpen;    WS.onmessage:=@DoIncomingMessage;    WS.onclose:=@DoClosed;  
The connection is made and I receive a message from out software. In the DoIncomingMessage event I try to handle the received data.
This should be an ArrayBuffer. And I try to handle this in the following way. Only myarray remains an array with a length of 0. So obviously I am doing something wrong. Does someone know what it is I am doing wrong? And the next question how do I cast the byte array to a string?


--- Code: Pascal  [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---var  mystring: string;  myarray:TJSUint8Array;     begin     myarray := TJSUint8Array.new(TJSUint8Array.from(Msg.Data));    mystring := myarray.toLocaleString;    Writeln(mystring);   end;   

Thaddy:
Since UTF8, UTF8 and UTF32 can at some point contain 4 bytes per character, your buffer needs to assume SizeOf(Byte) * 4 in all cases.... Basic...

dennis_uniwin:
I got it! I first had to make it an TJSObject and then a TJSUint8Array and then I can create a readable string finally.

--- Code: Pascal  [+][-]window.onload = function(){var x1 = document.getElementById("main_content_section"); if (x1) { var x = document.getElementsByClassName("geshi");for (var i = 0; i < x.length; i++) { x[i].style.maxHeight='none'; x[i].style.height = Math.min(x[i].clientHeight+15,306)+'px'; x[i].style.resize = "vertical";}};} ---     myObject := toObject(Msg.Data);     myarray  := TJSUint8Array.new(myObject);         for i := 0 to myarray.byteLength - 1 do begin       mystring:= mystring + Char(myarray.values[i]);     end;      Writeln('myString ' + mystring);      

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