我正在与Mozilla欧洲的一个项目工作。在这个项目中,我使用websocket by Worlize (服务器端)和Mozilla (客户端),Node.js尝试将文件从客户端上传到服务器。
我目前的目标是将文件的arraybuffer
发送到服务器。创建arraybuffer并发送它就可以了。
但是我的服务器告诉我arraybuffer
是一条utf8消息,而不是二进制消息。
我是不是误解了什么?如果不是,我该如何纠正呢?
客户端:
reader = new FileReader();
reader.readAsArrayBuffer(file);
reader.onload = function(e) {
connection.send(e.target.result);
};
服务器端:
ws.on('message', function(message,flags) {
if (!flags.binary) {
//some code
}
else {
console.log('It\'s a binary');
}
我也尝试了Blob
,同样的结果。二进制部分是不可见的。
发布于 2012-07-11 13:24:59
已经实现了对binary
data
的Gecko11.0 ArrayBuffer
发送和接收支持。
connection = new WebSocket( 'ws://localhost:1740' );
connection.binaryType = "arraybuffer";
connection.onopen = onopen;
connection.onmessage = onmessage;
connection.onclose = onclose;
connection.onerror = onerror;
发送Binary data
function sendphoto() {
imagedata = context.getImageData( 0, 0, imagewidth, imageheight );
var canvaspixelarray = imagedata.data;
var canvaspixellen = canvaspixelarray.length;
var bytearray = new Uint8Array( canvaspixellen );
for ( var i = 0; i < canvaspixellen; ++i ) {
bytearray[i] = canvaspixelarray[i];
}
connection.send( bytearray.buffer );
context.fillStyle = '#ffffff';
context.fillRect( 0, 0, imagewidth, imageheight );
}
接收Binary Data
if ( event.data instanceof ArrayBuffer ) {
var bytearray = new Uint8Array( event.data );
var tempcanvas = document.createElement( 'canvas' );
tempcanvas.height = imageheight;
tempcanvas.width = imagewidth;
var tempcontext = tempcanvas.getContext( '2d' );
var imgdata = tempcontext.getImageData( 0, 0, imagewidth, imageheight );
var imgdatalen = imgdata.data.length;
for ( var i = 8; i < imgdatalen; i++ ) {
imgdata.data[i] = bytearray[i];
}
tempcontext.putImageData( imgdata, 0, 0 );
var img = document.createElement( 'img' );
img.height = imageheight;
img.width = imagewidth;
img.src = tempcanvas.toDataURL();
chatdiv.appendChild( img );
chatdiv.innerHTML = chatdiv.innerHTML + "<br />";
}
发布于 2012-04-06 01:12:42
Note: Prior to version 11, Firefox only supported sending data as a string.
来源:https://developer.mozilla.org/en/WebSockets/Writing_WebSocket_client_applications
https://stackoverflow.com/questions/9546437
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