问题
So far the solution I found requires a crossdomain.xml to work,but this is not available on an IP camera:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" applicationComplete="init()">
<mx:Script>
<![CDATA[
import utils.video.mjpeg.MJPEG;
public function init():void{
Security.loadPolicyFile("xmlsocket:http://10.8.0.54/crossdomain.xml");
trace("xmlsocket:http://10.8.0.54/crossdomain.xml")
var vid:MJPEG = new MJPEG("10.8.0.54", "", 8081);
video.rawChildren.addChild(vid);
}
]]>
</mx:Script>
<mx:VBox id="video"></mx:VBox>
</mx:Application>
//////////////////////////
package utils.video.mjpeg
{
import flash.display.Loader;
import flash.events.Event;
import flash.events.ProgressEvent;
import flash.net.Socket;
import flash.utils.ByteArray;
import mx.utils.Base64Encoder;
/**
* This is a class used to view a MJPEG
* @author Josh Chernoff | GFX Complex
*
*/
public class MJPEG extends Loader
{
private var _user:String; //Auth user name
private var _pass:String; //Auth user password
private var _host:String; //host server of stream
private var _port:int; //port of stream
private var _file:String; //Location of MJPEG
private var _start:int = 0; //marker for start of jpg
private var webcamSocket:Socket = new Socket(); //socket connection
private var imageBuffer:ByteArray = new ByteArray(); //image holder
/**
* Create's a new instance of the MJPEG class. Note that due a sandbox security problem, unless you can place a crossdomain.xml
* on the host server you will only be able to use this class in your AIR applications.
*
* @example import MJPEG;
* var cam:MJPEG = new MJPEG("192.168.0.100", "/img/video.mjpeg", 80);
* addChild(cam);
*
* @param host:String | Host of the server. Do not include protocol
* @param file:String | Path to the file on the server. Start with a forward slash
* @param port:int | Port of the host server;
* @param user:String | User name for Auth
* @param pass:String | User password for Auth
*/
public function MJPEG (host:String, file:String, port:int = 80, user:String = null, pass:String = null )
{
_host = host;
_file = file;
_port = port;
_user = user;
_pass = pass;
webcamSocket.addEventListener(Event.CONNECT, handleConnect);
webcamSocket.addEventListener(ProgressEvent.SOCKET_DATA, handleData);
webcamSocket.connect(host, port);
}
private function handleConnect(e:Event):void
{
// we're connected send a request
var httpRequest:String = "GET "+_file+" HTTP/1.1\r\n";
httpRequest+= "Host: localhost:80\r\n";
/*
if(_user != null && _pass != null){
var source:String = String(_user + ":" + _pass);
var auth:String = Base64.encode(source);
httpRequest += "Authorization: Basic " + auth.toString()+ "\r\n"; //NOTE THIS MAY NEEED TO BE EDITED TO WORK WITH YOUR CAM
}
*/
httpRequest+="Connection: keep-alive\r\n\r\n";
webcamSocket.writeMultiByte(httpRequest, "us-ascii");
}
private function handleData(e:ProgressEvent):void {
//trace("Got Data!" + e);
// get the data that we received.
// append the data to our imageBuffer
webcamSocket.readBytes(imageBuffer, imageBuffer.length);
//trace(imageBuffer.length);
while(findImages()){
//donothing
}
}
private function findImages():Boolean
{
var x:int = _start;
var startMarker:ByteArray = new ByteArray();
var end:int = 0;
var image:ByteArray;
if (imageBuffer.length > 1) {
if(_start == 0){
//Check for start of JPG
for (x; x < imageBuffer.length - 1; x++) {
// get the first two bytes.
imageBuffer.position = x;
imageBuffer.readBytes(startMarker, 0, 2);
//Check for end of JPG
if (startMarker[0] == 255 && startMarker[1] == 216) {
_start = x;
break;
}
}
}
for (x; x < imageBuffer.length - 1; x++) {
// get the first two bytes.
imageBuffer.position = x;
imageBuffer.readBytes(startMarker, 0, 2);
if (startMarker[0] == 255 && startMarker[1] == 217){
end = x;
image = new ByteArray();
imageBuffer.position = _start;
imageBuffer.readBytes(image, 0, end - _start);
displayImage(image);
// truncate the imageBuffer
var newImageBuffer:ByteArray = new ByteArray();
imageBuffer.position = end;
imageBuffer.readBytes(newImageBuffer, 0);
imageBuffer = newImageBuffer;
_start = 0;
x = 0;
return true;
}
}
}
return false;
}
private function displayImage(image:ByteArray):void
{
this.loadBytes(image);
}
}
}
回答1:
Maybe I'm not understanding your question, but if we're talking about the same thing...
In my flash (which was written in AS2 so you may need to look up how it's different in AS3, I notice you're not using the security class of System... they may have removed that), I have this line...
System.security.loadPolicyFile("xml_root.socket://" + _root.HOST + ":" +_root.GAME_PORT );
I'm pretty sure this simply goes and fetches the static crossdomain.xml from the docroot of my server.
On the server side of things your socket code (what is that written in?) can deliver the crossdomain policy directly.
Here's the piece from my Perl socket that responds to the flash socket's initial request. I wrote this a long time ago but it would appear that the socket sends this tiny xml fragment as its initial communication to the socket "<policy-file-request/>" in response to which you want to do the following...
if($input eq "<policy-file-request/>"){ #if the string arriving on the socket == <policy-file-request>"
#assemble the printed response to look just like a crossdomain policy file. Set permissions as you normally would.
#if you don't know perl, the qq~ is just a way to provide a chunk of multiline code in one fragment. But note the \0 at the end. All socket messages have to be null terminated manually by you.
$MESSAGE = qq~<?xml version="1.0"?>
<cross-domain-policy>
<allow-access-from domain="*" to-ports="*"/>
</cross-domain-policy>\0~;
}
print "$MESSAGE"; #send the string back on the socket
Make sure this is actually what you need. Sometimes all you need is for the server to just have the crossdomain.xml policy file sitting at the docroot.
来源：https://stackoverflow.com/questions/3848855/how-to-render-ip-camera-video-with-socket-by-actionscript