


PHP and flash as3 socket communication transfer file implementation code,
Some time ago, I saw someone mention on flashseer: SWF files can be transmitted through sockets, so that users cannot obtain the SWF files... At that time, AS3 decompilation had not yet been released, so I did not care about the protection of the program. With the decompilation As the program becomes more accessible to the masses, friends who don’t want others to see the source code will be more anxious...
The idea of transmitting swf files through socket to avoid leaking source code (only applicable to as3): Let the loader of the main program (front-end swf) connect to the background program through the socket, and then request the required main program file. Read the main program in the background The program data is sent to the loader of the main program through the socket. The front-end swf applies the Loader.loadBytes method to display the main program file.
The following is the source program for the test:
package { import flash.display.Sprite; import flash.net.Socket; import flash.events.*; import flash.errors.IOError; import flash.display.Loader; public class SocketTest extends Sprite { public function SocketTest() { var socket = new Socket(); socket.connect("localhost", 5277); socket.addEventListener(Event.CLOSE, closeHandler); socket.addEventListener(Event.CONNECT, connectHandler); socket.addEventListener(IOErrorEvent.IO_ERROR, ioErrorHandler); socket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler); socket.addEventListener(ProgressEvent.SOCKET_DATA, socketDataHandler); var response:String; function writeln(str:String):void { str+=""; try { socket.writeUTFBytes(str); } catch (e:IOError) { trace(e); } } function sendRequest():void { trace("sendRequest"); response=""; writeln('bin'); socket.flush(); } function readResponse():void { //接受数据 var str:String=socket.readUTFBytes(socket.bytesAvailable); response+=str; //当数据以end结束的时候,数据传输结束 if (StringUtil.endsWith(str,'end')) { response=response.substr(0,response.length-3); //把字符串转换为ByteArray var ba=Base64.decodeToByteArray(response); //trace('bytearray=====',ba); var l:Loader = new Loader(); //从 ByteArray 对象中所存储的二进制数据中加载。 l.loadBytes(ba); //trace(l.content); addChild(l); } } function closeHandler(e:Event):void { trace("Socket closed! "); } function connectHandler(e:Event):void { trace("Socket connected!"); sendRequest(); } function ioErrorHandler(e:IOErrorEvent):void { trace("IOError!"); } function securityErrorHandler(e:SecurityErrorEvent):void { trace("SecurityError!"); } function socketDataHandler(e:ProgressEvent):void { trace("Socket have data!"); readResponse(); } } } }
PHP:
//后台scoket程序,由于适用php写比较简单,就用php写了. //error_reporting(E_ALL); error_reporting(0); set_time_limit(0); ob_implicit_flush(); $address = 'localhost'; $port = 5277; if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) < 0) { echo 'socket_create() failed: reason: ' . socket_strerror($sock) . '\n'; } if (($ret = socket_bind($sock, $address, $port)) < 0) { echo 'socket_bind() failed: reason: ' . socket_strerror($ret) . '\n'; } if (($ret = socket_listen($sock, 5)) < 0) { echo 'socket_listen() failed: reason: ' . socket_strerror($ret) . '\n'; } echo 'connect…………….'; do { if (($msgsock = socket_accept($sock)) < 0) { echo 'socket_accept() failed: reason: ' . socket_strerror($msgsock) . '\n'; break; } do { socket_recv($msgsock, $buf, 2048, 0); if ($buf == "") { socket_close($msgsock); echo "some one quit"; break; } else if ($buf == "bin") { //读取主程序数据 $f = fopen('main.swf','r'); $data = fread($f,filesize('main.swf')); fclose($f); //转换为字符串 //echo base64_encode($data); $talkback = base64_encode($data).'end'; } //发送 socket_send($msgsock, $talkback, strlen($talkback),0); } while (true); socket_close($msgsock); } while (true); socket_close($sock);

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。


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