: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

:DTree cfg
Request-local configuration tree. Apps can keep structured configuration here and traverse it with `context.cfg.get_by_path("path/to/value")`.

:DTree call
Invocation or message-local structured data

:DTree connection
Broker-owned per-WebSocket-connection state. Inside `WS(Request& context)`, updates to this tree persist for the lifetime of that socket connection.

: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

:context.set_status(s32 code[, String reason])
Sets the HTTP status line and updates `context.flags.status`. When `reason` is omitted, UCE uses a built-in standard reason phrase for common status codes.

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

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

: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

:unit_render(String file_name, [Request& context])
Invokes another UCE file using the current or supplied request context

:see
>types

:related
**PHP:** `$_SERVER`, `$_GET`, `$_POST`, `$_COOKIE`, `$_SESSION`, `header()`, and `http_response_code()`
**JavaScript / Node.js:** Express `req` and `res`, Fetch `Request`, `Headers`, cookies or session middleware, and per-connection state in WebSocket handlers