MACROMEDIA FLASH MEDIA SERVER 2-SERVER-SIDE ACTIONSCRIPT LANGUAGE Manuale Utente Scaricare il pdf (Pagina 227)

Access DLL 227

Access DLL is the libconnect.dll file (this module is named the libconnect.so file in

Linux installations) stored within the modules/access subdirectory of the root Flash Media

Server installation.

When a connection is attempted, Flash Media Server first determines whether or not Access

DLL exists.

■ If the Access module is available, the module is initialized on server startup with a context

pointer. The module also provides an adaptor interface to the server. Together, the context

pointer and adaptor pointer provide for two-way communications between the access

module and the main server. This context pointer can be used to gather server statistics.

■ If the Access module is not available, all connection requests proceed as usual. The

connection is accepted pending resources and valid application name.

Configuring Access DLL

The Flash Media Server administrator can configure how the Access DLL module handles

connection requests for the server’s resources. When the connection request from a client is

first attempted, the Access module intercepts the request before sending it to the server. The

Access DLL module calls upon its APIs to examine the information contained within the

connection request and authorizes or rejects the connection request.

The Access module uses the following APIs to examine the request:

■ The connection request activates the onAccess callback function within the Access

module.

■ The setValue function determines which field to examine and authenticate.

■ You select this field when you configure the setValue API.

■ The Access DLL module makes the value defined by the setValue function available to

the

getValue API.

■ The getValue function returns the value found in the predefined field of the connection

message.

■ The OnAccess function accepts or rejects the connection.

■ The getStats function collects server statistics from the context pointer.

When you configure this module, you can use the sample DLL authentication supplied by

Macromedia or apply your own authentication mechanism to intercept and examine

connection attempts to Flash Media Server.

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MACROMEDIA FLASH MEDIA SERVER 2-SERVER-SIDE ACTIONSCRIPT LANGUAGE Manuale Utente Pagina 227