MACROMEDIA FLASH MEDIA SERVER 2-SERVER MANAGEMENT ACTIONSCRIPT LANGUAGE Manuale Utente Scaricare il pdf (Pagina 112)

ADOBE FLASH MEDIA INTERACTIVE SERVER

Server-Side ActionScript Language Reference

109

</VirtualKeys>

Next, in the VirtualDirectory section of the Vhost.xml file, map the virtual keys to a virtual path and a physical

directory, which are separated by a semicolon (for example,

foo;c:\streams). To set up several virtual directories

for different Flash Player versions, use the same virtual path with different physical directories for each

Streams tag,

as shown in this example:

<Streams key="A">foo;c:\streams\on2</Streams>

<Streams key="B">foo;c:\streams\sorenson</Streams>

</VirtualDirectory>

Flash Media Interactive Server serves the client a stream from whichever virtual directory the virtual key is mapped

to. For example, if the client is Flash Player 8 and the call is

myNetStream.play("foo/familyVideo"), the

Streams element with key A would be used and the client would be served the higher-quality stream

c:\streams\on2\familyVideo.flv. If the client is Flash Player 7, the same URL maps to the sorenson stream directory

and the c:\streams\sorenson\familyVideo.flv file plays.

It is most common to change the values of the

VirtualKeys and VirtualDirectory elements in the Vhost.xml file.

However, you can call

Stream.setVirtualPath() to create Streams elements and you can use

Client.virtualKey to set a client’s Key value.

For more information about the Vhost.xml file, see Adobe Flash Media Server Configuration and Administration

Guide.

Availability

Flash Media Server 2

Parameters

virtualPath A string indicating the virtual directory path of a stream. If the stream is not located in the virtual

path, the default virtual directory path is searched.

directory A string indicating the physical directory in which to store streams.

virtualKey A string that sets or removes the key value for each Streams entry.

Note: To indicate a slash in the

virtualPath and directory parameters, you must use a forward slash (/) or a double

backslash (

\\). In strings, single backslashes are used to escape characters. A double backslash is the escape sequence for

a backslash character.

Example

The following code sets the virtual key to

B, the virtual path to foo, and the physical directory to c:\streams\on2:

Stream.setVirtualPath("foo", "c:/streams/on2", "B");

Stream.size()

Stream.size(name[, virtualKey])

Static; returns the size of a recorded stream in bytes.

Availability

Flash Media Server 2

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