:sig
Request* context;

:ServerState* server
Contains the current server state

:StringMap params
All FastCGI server parameters

:StringMap get
The current request's GET variables

:StringMap post
The current request's POST variables

:StringMap cookies
Cookies that have been transmitted by the browser

:StringMap session
The current session

:String session_id
ID of the session cookie

String session_name
Name of the session cookie

:DTree var
Variable user-defined data

:std::vector<UploadedFile> uploaded_files
Files that have been uploaded in the current request

:StringMap header
Headers to be sent back to the browser

:StringList set_cookies;
Cookies that should be sent back to the browser

:u64 random_seed
The current request's "random" noise generator seed

:u64 random_index
The current request's "random" noise generator index position

:MemoryArena* mem
Contains the current request's memory arena

:bool flags.log_request
Whether the request should be logged

:Stats
	u32 stats.bytes_written
	f64 stats.time_init
	f64 stats.time_start
	f64 stats.time_end

:invoke(String file_name, [DTree& call_param])
Invokes the UCE file 'file_name'