You can think of file transfers, also known as handouts, as another type of slide set. Handouts can be considered slide sets that contain only one slide of a single type: a transferred file.

The Web Conferencing Server follows the same process to save and update handout slides that it uses for other slide sets. First, the server saves two encrypted XML files for each handout. The content of the two files is the same. The second file is provided for backup purposes.

The update procedure for a handout is called every five minutes. If an update operation fails, the changes made to a handout in the past five minutes are not saved. If the Web Conferencing Server stops running during this period, changes to the handout can be lost. However, the Web Conferencing Server continually tries to update the XML files every five minutes. As a result, if one attempt fails, the Web Conferencing Server can attempt to save the content later.

The only differences in the save and update process for handouts are the location where the files are saved and updated, the naming convention used to name the files, and the file that keeps track of the IDs for the slide set for handouts.

The files are saved under a separate subfolder (named ft) in the conference folder for the organizer. The FTMaxID files contain the last used ID. The names of the files in which the slide set information is saved take the following form: fileset-<id>.exml. The files are encrypted using the master encryption key.

The file content represents the XML serialization of handout information. Because handout slides are shared over HTTPS in the XML, there is an encryption key and the randomly generated name for the file that is saved in the content folder.

Metadata File for a Handout (File Transfer)

The following is an example of the XML content for a handout (file transfer).

Copy Code 
<fileset 
   name="a8f5689f4866.blb" 
   size="37" 
   key="48d9dd6ebe2ca367478da698493edc21" 
   UploadedOnDate="8/25/2007 12:20 PM" 
   UploadedOn="1188069617459" 
   UploadedBy="sip:vw01@rtcdev.contoso.microsoft.com" 
   file_deleted="false" 
   original_filename="test.txt" 
   creation_date="128325431784134388" 
   CreatedOnDate="1/18/8441 5:22 PM" 
   modification_date="128325431917125620" 
   ModifiedOnDate="1/20/8441 6:18 AM">
</fileset>