Citrix Application Streaming Communication Process

For those who are (still) using Citrix Application Streaming, this article from the CitrixKB describes the communication process that occurs when a user requests a streamed application from XenApp.

A user clicks a published application icon for an application configured for streaming. The application launch request is relayed to Web Interface.

Web Interface contacts the XenApp server to obtain the information required to run the application.

Web Interface creates a .RAD file based on the information obtained from the XenApp server and provides for the RadeRun utility, (RADERUN.EXE), which can be in either of two of the following locations.

Located on the client device, if the published application is being streamed to the desktop of the client device
Located on the XenApp server, if the published application is being streamed to a server

The RADERUN utility passes the .RAD file to the Citrix Streaming Service (RADESVC), which creates an isolation environment and downloads the application profile from the server.

The Citrix Streaming Service opens the application executable according to the instructions included in the application profile and runs the executable inside the isolation space

Additional application files are downloaded from the server as needed during normal application usage.

Source: CTX128917