UCE Docs / Request Context Params

UCE populates several convenience request parameters before invoking page, component, CLI, custom HTTP, or WebSocket handlers:

• context.params["SCRIPT_URL"]: canonical script URL, with /index.uce collapsed to the containing directory URL

• context.params["BASE_URL"]: canonical directory URL for the script

• context.params["ROUTE_PATH"]: sanitized first keyless query-string segment, defaulting to index when no route was supplied

• context.params["ROUTE_PAGE"]: first segment of ROUTE_PATH

• context.params["ROUTE_PATH_RAW"]: normalized but not trusted route input, for diagnostics only

• context.params["ROUTE_VALID"]: 1 when the supplied/defaulted route is safe, 0 when the supplied route was rejected

• context.params["UCE_BIN_DIRECTORY"]: writable runtime cache directory from BIN_DIRECTORY, useful for generated helper units or other request-local artifacts that must not be written into the source tree

ROUTE_PATH is safe to compose under an application-controlled route root. Unsafe route input such as .., ., empty interior segments, backslashes, dots in filenames, or other non route-segment characters is rejected by the runtime and yields an empty ROUTE_PATH with ROUTE_VALID=0.

These are useful for front-controller apps that use URLs like /?dashboard or /?workspace/projects while still accepting ordinary named query parameters.