zoukankan      html  css  js  c++  java
  • Processing Binary Protocols with Client-Side JavaScript

    http://blog.mgechev.com/2015/02/06/parsing-binary-protocol-data-javascript-typedarrays-blobs/

    https://github.com/novnc/websockify

    ws.binaryType = "blob";
    // or
    ws.binaryType = "arraybuffer";

    var pixels=16,
    a=new Uint8Array(pixels*3),
    l=pixels*1;
    while(l--){
     a[l*3]=255;//red
     a[l*3+1]=0;//green
     a[l*3+2]=0;//blue
    }
    ws.send(a.buffer);


    // 使用ArrayBuffer发送canvas图像数据
     
    var img = canvas_context.getImageData(0, 0, 400, 320);
     
    var binary = new Uint8Array(img.data.length);
     
    for (var i = 0; i < img.data.length; i++) {
     
     binary[i] = img.data[i];
     
    }
     
    connection.send(binary.buffer);
    // 使用Blob发送文件
    var file = document.querySelector(‘input[type=”file”]').files[0];
    connection.send(file);
     
     

     function valueToByteArray(value, bytes_length) { var bytes_array = []; while (bytes_length > 0){ var byte = value & 0xFF; value >>= 8; bytes_length--; bytes_array.push(byte); } return bytes_array.reverse(); }

  • 相关阅读:
    HDU4126
    训练赛Day6-The 36th ACMICPC Asia Regional Beijing Site
    弦图
    HDU4821 字符串哈希+尺取
    HDU1854
    HDU1166
    输入输出挂
    LightOj 1027 数学期望
    HDU
    HDU
  • 原文地址:https://www.cnblogs.com/DotNet1010/p/7772058.html
Copyright © 2011-2022 走看看