ActionScript 3.0 :: Binary Socket Policy File On Server
Jan 15, 2009
I am attempting to setup a binary socket connection between flash running on my desktop and a Rabbit RCM3800 Microcontroller providing the server on my home network, which has no file system and has a very basic http server on it. Due to limitations of the microC I cannot run Java/Perl/Python or any other server on it other than setting up a server using its own native Dynamic C language (essentially manually opening and controlling sockets in C). I am able to successfully connect to a socket on port 3333 of the server and transfer information between the server and the .swf file when it is the sandbox type "local-trusted" (while I'm debugging in Flash).
Because of this I'm fairly certain the code to setup the socket between the server and flash works fine. My problem occurs when I try to run the .swf file as "local-with-network" (such as running it after publishing on my desktop) or "remote" (accessing the .swf file when it is located on the server) and it then requires a socket policy server to host a socket policy file on the server. On my server I have code setup such that whenever a socket opens on port 843 or port 3333 (my data port) and sends a stream of raw data containing the request <policy-file-request/>, the server writes back in ASCII the below code and closes the socket.
So for some reason flash times out while waiting for the socket policy file. I have tested sending the <policy-request-file/> over telnet, and have received the above policy file. I have also sniffed using wireshark and saw that my desktop sent the policy request and received the policy file. I am guessing that Flash times out because it is waiting for some kind of terminating character that states the end of the policy file, and to that end I have tried sending. Interestingly, instead of sending the policy file I have tried sending random data from the server to flash, and flash displayed the Warning: Ignoring policy file at (URL) due to incorrect syntax. Because I don't receive this warning when I send my policy file I don't think it is formatted incorrectly.
I have also tried using the below flash code to hold the socket request open indefinitely, but it also errors after 20seconds.
Code: Select allSecurity.loadPolicyFile("xmlsocket://192.168.1.59:843");
The .swf file will eventually reside on the server itself at 192.168.1.59/myProg.html. I have only tested the flash file remotely on the server a couple times, and in addition to the previous warnings/errors, I received the warning: SWF from (URL) may not connect to a socket in its own domain without a policy file.
I'm trying to evaluate whether Flex can access binary sockets. Seems that there's a class calles Socket (flex.net package). The requirement is that Flex will connect to a server serving binary data. It will then subscribe to data and receive the feed which it will interpret and display as a chart. I've never worked with Flex, my experience lies with Java, so everything is new to me. So I'm trying to quickly set something simple up. The Java server expects the following:
DataInputStream in = ..... byte cmd = in.readByte(); int size = in.readByte(); byte[] buf = new byte[size]; in.readFully(buf); [Code] .....
After that - EOFException happens on the server and that's it. So the question is, am I approaching whole streaming data issue wrong when it comes to Flex? Am I sending the policy file wrong? Unfortunately, I can't seem to find a good solid example of how to do it. It seems to me that Flex can do binary Client-Server application, but I personally lack some basic knowledge when doing it. I'm using Flex 3.5 in IntelliJ IDEA IDE.
Has anyone been able to successfully implement a service to serve the required socket policy file to FlashPlayer?I am running the Python implementation of the service provided by Adobe at
Actionscript Socket Policy File Server Problems Has anyone been able to successfully implement a service to serve the required socket policy file to FlashPlayer?
I'm trying to get my Flash application to connect via socket to my server, so I need to set up a socket policy file server. It seems like there are various roll-your-own implementations floating around out there, but is there any kind of standard or best practice with what to use?
As an aside, it seems strange that Adobe imposes this restriction but doesn't make something readily available to support it.
I am working on the web base flash application I am trying to communicate with server through binary socket to the server through IP Address and Port using Action script 3.0 at the server side we are using java. I will like to send binary data string to the server in a clubbed single packet. I dont know the Action Script 3.0 as much.for this We will have to communicate through IP and Port only
I'm trying to make a little ftp upload app - not a full FTP client, just something to enable image upload with decent performance. I basically took the approach Lee used in his POP3 socket tutorial. The problem I'm having is that I can connect to the FTP server and I can authenticate and log in but as soon as I try to enter passive mode for data transfer I get nothing- not even an error. From looking at the FTP RFCs, FTP requires two TCP connections - a command connection and a data connection - does this mean that I need to open a second socket for the data transfer? Another possible issue is the Flash Player security policy not allowing conection to ports under 1024 - I have not placed a policy file or policy server on the host running the FTP server but as I can successfully login, I appear to be able to connect to port 21 (standard FTP port) anyway. The code I'm using is:
Code: Select allvar s:Socket = new Socket("ftp.actechnology.co.uk",21); var ftp_response:String; s.addEventListener(ProgressEvent.SOCKET_DATA, receiveReply); s.addEventListener(IOErrorEvent.IO_ERROR, showError);
[Code].....
why passive mode kills it or has successfully connected to a FTP server with the socket class
I have 2 applications which I wrote in ActionScript 3.0 as client and C#.net as server. These are basic chat applications. Also I have a test website which is running under the same machine with chat server application.
Server application is listening 289 port, flash application connecting to server with domain and 289 port, it can talk with server during working on Flash. But when I put the flash in a html page, the socket connection is breaking after a while because of security reasons.
I know that is necessary to put a crossdomain.xml file on target website's root folder. The problem is here: Yes, there is a crossdomain.xml file like this:[URL]...
Basically I'm using Flash to connect to a Java server.Despite my Java application replying to the <policy-file-request/>, in the Flash debug log it lists (not sure about the order as there are lots):
Security Sandbox Violation * Connection to 192.168.1.86:4049 halted Warning: Timeout on
I have created a flex app that uses sockets. I published the flex app in a web application that runs on glassfish server. Now from that flex app i create a socket connection to a C# server and start sending/receiving data.The problem is that after i create the socket connection to C# server the flex app first checks the policy file, and after it get's it, it closes the socket, without keep the connection alive.[code] Now after i create the connection and it gets the policy from server it closes this socket, so to be able to use this connection i have to call again [code]After i do this, i can use normally the connection
Running my Flash app from localhost (in debug) I can connect/contact the socket server just fine. Note: It doesn't seem as though the server detects any 843 connection (e.g. the policy file port) this way. However, when I move the app to the server itself and run it from there (i.e. from the website), it will send the policy file, get a disconnect (as it should), and then try to execute the regular port stuff but doesn't read anything from Flash. It seems like my Flash app isn't writing to the port as it should, or something else is going wrong. I did also notice that Flash seems to be trying to send the policy-file-request twice.My process right now is like this:
1) Flash tries to connect to port 843. The server responds to its <policy-file-request/> with the policy file.
2) Flash reads it, disconnects from 843
3) Server gets graceful disconnect, then gets another connection on 843.
4) Just after that, the server gets a connection on 2188, but reads another <policy-file-request/>, so sends the policy file again.
5) At this point, Flash SHOULD simply write the string "Test" to the socket (that's in my connect handler). However, my server doesn't seem to read anything on the socket after the second <policy-file-request/>.[code]
I have an application that connects to a binary socket server running on port 2234. I use the python policy file server, which I downloaded from [URL], which runs on port 843. If the client app is trying to connect to a socket I can see that the server is receivng the request for a policy file and that it sends it to the client. However, in the client, I get a security sandbox error. How is this possible? And is it possible to check whether the client really received the policy file? BTW, here is my policy file:
<?xml version="1.0"?><!DOCTYPE cross-domain-policy SYSTEM "/xml/dtds/cross-domain-policy.dtd"><cross-domain-policy><allow-access-from domain="*" to-ports="*" /></cross-domain-policy>
In my Flash app, I'm connecting to my server like this:
Security.loadPolicyFile("xmlsocket://example.com:12860"); socket = new Socket("example.com", 12869); socket.writeByte(...); socket.flush();
At port 12860 I'm running a socket policy server, which (according to this document) correctly serves up my policy like this:
[Code]...
I get no security warnings, which I used to get before the policy server was in place. Still, the connection to port 12869 doesn't work. It's made (I can see with Wireshark and on the server), but no data is sent by Flash. It might be worth knowing that the SWF itself is served from example.com as well.
So, this is a copy of another post I made, but I get a sneaking suspicion I put the post in the wrong forum:[URL]..The summary:
The Socket class in flash player sometimes, for some users (across all sorts of OS and Browsers) will not ask for the policy file from port 843 first, but instead will go straight to the port of the outgoing request, which in this case is our game server, who doesn't really understand the request.
In every case so far the user *is* using the latest version of flash too, so it's not an issue without outdated policy methods, which would have been my first guess.For most people it works just fine, but I posted a log in the thread for one of the non-working players. It's pretty mysterious, and I haven't found a fix yet... though I'm going to experiment with some work arounds.
I'm trying to talk to a fully RESTful api of my own creation. The api is up and running but flash does not support PUT and DELETE, and does not recieve http status codes properly, plus a whole load of other issues with flashes anaemic http support.
To get around this I am trying to use as3httpclientlib. A 3rd party as3 http library, that uses socket connections to access the whole http protocol properly. It's a great library, unfortunately because it uses sockets flash requires implementation of the socket policy file, even though the access is all via port 80, the standard http port.
[URL]
This has given me a real headache. I can't implement the port 843 policy server as the documentation suggests because it's out of my ability level i feel. Also when the client is running it may be behind a corporate firewall that doesn't allow 843 access, so serving the policy file via the standard port seems the way forward. This is where I am stuck.
The policy file documentation says this shouldn't matter as if you cant access 843 because of your firewall you'll be unable to access non standard ports anyway, but I am accessing standard ports, only via sockets instead of URLLoader.
In the root of my server I have placed the following policy file:
Code: <?xml version="1.0"?> <!DOCTYPE cross-domain-policy SYSTEM "/xml/dtds/cross-domain-policy.dtd"> <cross-domain-policy>
I have created a socket server on port 6666 because port 843 is in use on my mac.So when flash player request "policy-file-request" I return to it the cross domain xml, but I keep getting the security error that "cannot load data from".[code]As you see I receive the cross domain from the socket server.But I don't understand why flash player doesn't accept that?xmlsocket.connect("localhost", "6666");Does anybody have any idea why it throws that error "cannot load data from" ?
I have a custom socket class designed to connect to a server and talk with it. At one point, the server uses hex data for speed, however Flash seems to not get ANY of this data. In fact, it doesn't get ANY of the data from that point to the next packet.
I'm using a binary socket to talk to a server and it works fine the first time I send data. Then I receive data from the server and send a response but it's never received... like the connection closed or something. I have an event handler on the socket close event, but it doesn't fire. I can trace to the socket sending data, but if I trap the data received event on the server, nothing is received.. like it's closed the socket. Is there something I need to reset or have I missed a key concept in binary sockets?
for a long time I could easily make socket connections from my swf files tom simples java servers on various ports (swfs embeded from activex, for example). I used the simple python server policy file provided at this article to open the needed tcp ports to my flash applications.
Last time I worked with flash sockets I knew that a policy file is required only if the swf file is embedded in a different domain from the one where the socket connection is about to be made. Did newer version of flash player changed this, so now they'll alk for a policy file no matter what?
is it possible to load a swf into another swf using a binary socket instead of the traditional AS3 Loader class? Would you share some code or pointers?
I'm working on a Flash/Facebook game. My swf and socket server are on different domains, so I have to use a socket policy file. According to Adobe, they have "filed with IANA, the Internet Assigned Numbers Authority, to reserve port 843 for the purposes of serving socket policy files." Unfortunately, my server has port 843 closed. I asked my server guy to open the port. Here's his reply:
[quote]One of the points Matt mentioned is even if we open that particular port how would you ensure the scores of people accessing this game from their schools, libraries or even people internal to OurCompany will have connectivity on the port. Let me explain, in order for traffic to flow on port 843 from the browser to the smart fox server, the users ISP also has to allow for that traffic to pass outbound from the users browser. It is possible that several users would not be able to run it, is that risk acceptable ?[/quote]
How common is it for ISPs to block port 843? I assumed that, since this is an Adobe standard, that ISPs would now have it open by default. What's the scoop?
I am starting with a short introduction: I am currently working on a project, which involves a server application written in .NET (C#) and a flash gui app as client (standalone flash player 10 [code is written in Actionscript 3.0]). The server constantly sends bitmaps to the client (up to 30fps). The connection is established using binary sockets and data ist streamed to avoid socket open/close/reconnection problems.The bitmaps sent to the client are marked with begin- and end-tags. A length field was added as well, to optimise the following parsing process. The client buffers the received data up to the point where an end-tag is found. The client reassambles the bitmaps on the screen by parsing the current buffer. Parsing means looking for begin-tags and length fields and/or end-tags of pictures packages. The resulting bitmap data is copied into a byte array and will loaded into a movieclip using the flash.display.Loader class ( bytePictureLoader. loadBytes( byteArray ); ).[code]While testing, I found out that in some cases the data stream becomes currupted, i.e. data is lost and/or the transmittion is incomplete.
A good thing is that this error is reproducable.It seems that as soon as the Flash Application Window is dragged (moved on Windows Desktop) the stream lacks data. The same error occurs, if too much data is sent to the client. The results are performance problems, data loss and other strange effects. The more data is sent on the stream, the more data has to be parsed and the more data gets lost somehow. Sometimes this leads to a memory problem, because Begin- and End-Tags aren't transmitted correctly. In order to fix (counteract) that, I discard data as long as there is no Begin-tag found and the buffer is cleared when the size exceeds 1Mb.It works so far, but the application lacks performance and stability.I.e. If 20 bitmaps per second with 620x390px are sent to the client, the client only receives 16 to 17 bitmaps, if the application does nothing else.If 30 bitmaps per second with 620x390px are sent to the client, the client only receives about 20 to 21 bitmaps.I am guessing that using actuall video streams would be better, then sending one bitmap at a time in a byte stream.Is there a proper example on how to build a client app in flash to receive/parse a binary data stream?Does anyone else has recognized the lost-data problem or the interruption of streams?
I'm trying to play around using SmartFox Server in AS3. I've created a simple test swf that works from the Flash IDE, but when I publish and try to run the swf file I get the socket error that swfs with file-system can't use sockets. Is there a way to get a socket server going that will allow local swfs to use sockets?
I'm kinda noobish when it comes to getting information from XML information sent to my flash file from the socket server. OK so for example the server sends me this:
[Code]...
I want to get the name of the user and the X and Y position! Is there a way I can get this information without a load of fuss from functions and other junk remember im kinda noobish.
I'm trying to create a simple Flash chat application for educational purposes, but I'm stuck trying to send a policy file from my Java server to the Flash app (after several hours of googling with little luck). The policy file request reaches the server that sends a harcoded policy xml back to the app, but the Flash app doesn't seem to react to it at all until it gives me a security sandbox error.
I have project Business card design, my app have feature save their design with PNG extension after customer design their business card to server. I sent binary of PNG to server by urlRequest and urlLoader. But with files have file size more than 5mb, it can't upload.
