| window.runtime property | window.runtime.flash.net.XMLSocket |
| Inheritance | XMLSocket EventDispatcher Object |
| Runtime Versions: | AIR 1.0, |
- XML messages are sent over a full-duplex TCP/IP stream socket connection.
- Each XML message is a complete XML document, terminated by a zero (0) byte.
- An unlimited number of XML messages can be sent and received over a single XMLSocket connection.
Setting up a server to communicate with the XMLSocket object can be challenging. If your application does not require real-time interactivity, use the URLLoader class instead of the XMLSocket class.
To use the methods of the XMLSocket class, first use the constructor, new XMLSocket,
to create an XMLSocket object.
SWF files in the local-with-filesystem sandbox may not use sockets.
Socket policy files on the target host specify the hosts from which SWF files can make socket connections, and the ports to which those connections can be made. The security requirements with regard to socket policy files have become more stringent in the last several releases of Flash Player. In all versions of Flash Player, Adobe recommends the use of a socket policy file; in some circumstances, a socket policy file is required. Therefore, if you are using XMLSocket objects, make sure that the target host provides a socket policy file if necessary.
The following list summarizes the requirements for socket policy files in different versions of Flash Player:
- In Flash Player 9.0.124.0 and later, a socket policy file is required for any XMLSocket connection. That is, a socket policy file on the target host is required no matter what port you are connecting to, and is required even if you are connecting to a port on the same host that is serving the SWF file.
- In Flash Player versions 9.0.115.0 and earlier, if you want to connect to a port number below 1024, or if you want to connect to a host other than the one serving the SWF file, a socket policy file on the target host is required.
- In Flash Player 9.0.115.0, even if a socket policy file isn't required, a warning is displayed when using the Flash Debug Player if the target host doesn't serve a socket policy file.
However, in Adobe AIR, content in the application security sandbox (content
installed with the AIR application) are not restricted by these security limitations.
For more information related to security, see the Flash Player Developer Center Topic: Security.
See also
| Property | Defined By | ||
|---|---|---|---|
| connected : Boolean [read-only]
Indicates whether this XMLSocket object is currently connected. | XMLSocket | ||
![]() | constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
![]() | prototype : Object [static]
A reference to the prototype object of a class or function object. | Object | |
| timeout : int
Indicates the number of milliseconds to wait for a connection. | XMLSocket | ||
| Method | Defined By | ||
|---|---|---|---|
XMLSocket(host:String = null, port:int = 0)
Creates a new XMLSocket object. | XMLSocket | ||
![]() | addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener
receives notification of an event. | EventDispatcher | |
close():void
Closes the connection specified by the XMLSocket object. | XMLSocket | ||
connect(host:String, port:int):void
Establishes a connection to the specified Internet host using the specified TCP port. | XMLSocket | ||
![]() | dispatchEvent(event:Event):Boolean
Dispatches an event into the event flow. | EventDispatcher | |
![]() | hasEventListener(type:String):Boolean
Checks whether the EventDispatcher object has any listeners registered for a specific type
of event. | EventDispatcher | |
![]() | hasOwnProperty(name:String):Boolean
Indicates whether an object has a specified property defined. | Object | |
![]() | isPrototypeOf(theClass:Object):Boolean
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
![]() | propertyIsEnumerable(name:String):Boolean
Indicates whether the specified property exists and is enumerable. | Object | |
![]() | removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object. | EventDispatcher | |
send(object:*):void
Converts the XML object or data specified in the object parameter
to a string and transmits it to the server, followed by a zero (0) byte. | XMLSocket | ||
![]() | setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void
Sets the availability of a dynamic property for loop operations. | Object | |
![]() | toLocaleString():String
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
![]() | toString():String
Returns the string representation of the specified object. | Object | |
![]() | valueOf():Object
Returns the primitive value of the specified object. | Object | |
![]() | willTrigger(type:String):Boolean
Checks whether an event listener is registered with this EventDispatcher object or any of
its ancestors for the specified event type. | EventDispatcher | |
| Event | Summary | Defined By | ||
|---|---|---|---|---|
![]() | [broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active. | EventDispatcher | ||
| Dispatched when the server closes the socket connection. | XMLSocket | |||
| Dispatched after a successful call to the XMLSocket.connect() method. | XMLSocket | |||
| Dispatched after raw data is sent or received. | XMLSocket | |||
![]() | [broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive. | EventDispatcher | ||
| Dispatched when an input/output error occurs that causes a send or receive operation to fail. | XMLSocket | |||
| Dispatched if a call to the XMLSocket.connect() method attempts to connect either to a server outside the caller's security sandbox or to a port lower than 1024. | XMLSocket | |||
connected | property |
timeout | property |
timeout:int| Runtime Versions: | 1.5 |
Indicates the number of milliseconds to wait for a connection.
If the connection doesn't succeed within the specified time, the connection fails. The default value is 20,000 (twenty seconds).
XMLSocket | () | Constructor |
public function XMLSocket(host:String = null, port:int = 0)| Runtime Versions: | AIR 1.0, |
Creates a new XMLSocket object. If no parameters are specified, an initially disconnected socket is created. If parameters are specified, a connection is attempted to the specified host and port.
Note: It is strongly advised to use the constructor form without parameters, then
add any event listeners, then call the connect method with host
and port parameters. This sequence guarantees that all event listeners will work
properly.
host:String (default = null) — A fully qualified DNS domain name or an IP address in the form
.222.333.444. In Flash Player 9.0.115.0 and AIR 1.0 and later,
you can specify IPv6 addresses, such as rtmp://[2001:db8:ccc3:ffff:0:444d:555e:666f].
You can also specify null to connect to the host server
on which the SWF file resides. If the SWF file issuing this call is running in a web browser,
host must be in the same domain as the SWF file.
| |
port:int (default = 0) — The TCP port number on the target host used to establish a connection.
In Flash Player 9.0.124.0 and later, the target host must serve a socket policy file
specifying that socket connections are permitted from the host serving the SWF file
to the specified port. In earlier versions of Flash Player, a socket policy file is required
only if you want to connect to a port number below 1024,
or if you want to connect to a host other than the one serving the SWF file.
|
See also
close | () | method |
public function close():void| Runtime Versions: | AIR 1.0, |
Closes the connection specified by the XMLSocket object.
The close event is dispatched only when the server
closes the connection; it is not dispatched when you call the close() method.
See also
connect | () | method |
public function connect(host:String, port:int):void| Runtime Versions: | AIR 1.0, |
Establishes a connection to the specified Internet host using the specified TCP port.
If you specify null for the host parameter, the host
contacted is the one where the file calling XMLSocket.connect() resides.
For example, if the calling file was downloaded from www.adobe.com, specifying null
for the host parameter means you are connecting to www.adobe.com.
For more information, see the Flash Player Developer Center Topic: Security.
Parameters
host:String — A fully qualified DNS domain name or an IP address in the form
111.222.333.444. You can also specify null to connect to the host server
on which the SWF file resides. If the calling file is a SWF file running in a web browser,
host must be in the same domain as the file.
| |
port:int — The TCP port number on the target host used to establish a connection.
In Flash Player 9.0.124.0 and later, the target host must serve a socket policy file
specifying that socket connections are permitted from the host serving the SWF file
to the specified port. In earlier versions of Flash Player, a socket policy file is required
only if you want to connect to a port number below 1024,
or if you want to connect to a host other than the one serving the SWF file.
|
Events
securityError: — A connect operation attempted
to connect to a host outside the caller's security sandbox, or
to a port that requires a socket policy file. Work around either problem by using
a socket policy file on the target host. | |
data: — Dispatched when raw data has been received. | |
connect: — Dispatched when network connection has been established. |
Throws
SecurityError — Local untrusted files may not communicate with
the Internet. Work around this limitation by reclassifying the file
as local-with-networking or trusted.
| |
SecurityError — You may not specify a socket port higher than
65535.
|
See also
send | () | method |
public function send(object:*):void| Runtime Versions: | AIR 1.0, |
Converts the XML object or data specified in the object parameter
to a string and transmits it to the server, followed by a zero (0) byte. If object
is an XML object, the string is the XML textual representation of the XML object. The
send operation is asynchronous; it returns immediately, but the data may be transmitted at a
later time. The XMLSocket.send() method does not return a value indicating whether
the data was successfully transmitted.
If you do not connect the XMLSocket object to the server using
XMLSocket.connect()), the XMLSocket.send()
operation fails.
Parameters
object:* — An XML object or other data to transmit to the server.
|
Throws
IOError — The XMLSocket object is not connected to the server.
|
See also
close | Event |
flash.events.Eventproperty Event.type =
flash.events.Event.CLOSE| Runtime Versions: | AIR 1.0, |
Dispatched when the server closes the socket connection.
The close event is dispatched only when the server
closes the connection; it is not dispatched when you call the XMLSocket.close() method.
Event.CLOSE constant defines the value of the type property of a close event object.
This event has the following properties:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
target | The object whose connection has been closed. |
connect | Event |
flash.events.Eventproperty Event.type =
flash.events.Event.CONNECT| Runtime Versions: | AIR 1.0, |
Dispatched after a successful call to the XMLSocket.connect() method.
Event.CONNECT constant defines the value of the type property of a connect event object.
This event has the following properties:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
target | The Socket or XMLSocket object that has established a network connection. |
data | Event |
flash.events.DataEventproperty DataEvent.type =
flash.events.DataEvent.DATA| Runtime Versions: | AIR 1.0, |
Dispatched after raw data is sent or received.
Defines the value of thetype property of a data event object.
This event has the following properties:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
data | The raw data loaded into Flash Player or Adobe AIR. |
target | The XMLSocket object receiving data. |
ioError | Event |
flash.events.IOErrorEventproperty IOErrorEvent.type =
flash.events.IOErrorEvent.IO_ERROR| Runtime Versions: | AIR 1.0, |
Dispatched when an input/output error occurs that causes a send or receive operation to fail.
Defines the value of thetype property of an ioError event object.
This event has the following properties:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
errorID | A reference number associated with the specific error (AIR only). |
target | The network object experiencing the input/output error. |
text | Text to be displayed as an error message. |
securityError | Event |
flash.events.SecurityErrorEventproperty SecurityErrorEvent.type =
flash.events.SecurityErrorEvent.SECURITY_ERROR| Runtime Versions: | AIR 1.0, |
Dispatched if a call to the XMLSocket.connect() method
attempts to connect either to a server outside the caller's security sandbox or to a port lower than 1024.
SecurityErrorEvent.SECURITY_ERROR constant defines the value of the type property of a securityError event object.
This event has the following properties:
| Property | Value |
|---|---|
bubbles | false |
cancelable | false; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
target | The network object reporting the security error. |
text | Text to be displayed as an error message. |
See also
- The
init()creates a XMLSocket instance namedsocketand passessockettoconfigureListeners()(described below) and then calls the XMLSocket object'sconnect()method using your domain as the host name and port number8080. - The
configureListeners()method adds listeners for each of the supported XMLSocket events:closeHandler(): listens for thecloseevent, which is dispatched after the network connection has been closed.connectHandler(): listens for theconnectevent, dispatched when the network connection has been established.dataHandler(): listens for thedataevents, dispatched every time the XMLSocket receives new data.progressHandler(): listens for theprogressevents, dispatched when a call tosend()has been made and while the send is ongoing.securityErrorHandler(): listens forsecurityErrorevents, which would be dispatched if an attempt was made to access the XMLSocket with the wrong local playback security setting or using a port lower than 1024.ioErrorHandler(): listens forioErrorevents, which would happen only if an operation to send or receive data failed.
Notes:
- You need a server running on your domain using port 8080 for this example to work.
- If you are running Flash Player 9.0.124.0 or later, you need to place a socket policy file on your server that permits socket connections from your domain to port 8080. For information on serving socket policy files, see the Flash Player Developer Center Topic: Setting up a socket policy file server.
<html>
<head>
<script src="AIRAliases.js" />
<script>
var hostName = "[yourDomain]"; // String
var port = 8080; // Number
var socket; // XMLSocket
function init() {
socket = new air.XMLSocket();
configureListeners(socket);
if (hostName && port) {
socket.connect(hostName, port);
}
}
function send(data) {
socket.send(data);
}
function configureListeners(dispatcher) {
dispatcher.addEventListener(air.Event.CLOSE, closeHandler);
dispatcher.addEventListener(air.Event.CONNECT, connectHandler);
dispatcher.addEventListener(air.DataEvent.DATA, dataHandler);
dispatcher.addEventListener(air.IOErrorEvent.IO_ERROR, ioErrorHandler);
dispatcher.addEventListener(air.ProgressEvent.PROGRESS, progressHandler);
dispatcher.addEventListener(air.SecurityErrorEvent.SECURITY_ERROR, securityErrorHandler);
}
function closeHandler(event) {
air.trace("closeHandler: " + event);
}
function connectHandler(event) {
air.trace("connectHandler: " + event);
}
function dataHandler(event) {
air.trace("dataHandler: " + event);
}
function ioErrorHandler(event) {
air.trace("ioErrorHandler: " + event);
}
function progressHandler(event) {
air.trace("progressHandler loaded:" + event.bytesLoaded + " total: " + event.bytesTotal);
}
function securityErrorHandler(event) {
air.trace("securityErrorHandler: " + event);
}
</script>
</head>
<body onload="init()">
</body>
</html>Thu Sep 29 2011, 02:34 AM -07:00

Hide Inherited Public Properties
Show Inherited Properties