Passing parameters between local request handlers

In Gliimly, there are no "functions" or "methods" as you may be used to in other languages. Any encapsulation is a request handler - you can think of it as a simple function that executes to handle a request - it can be called from an outside caller (such as web browser, web API, or from a command-line), or from another handler.

By the same token, there are no formal parameters in a way that you may be used to. Instead, there are named parameters, basically name/value pairs, which you can set or get anywhere during the request execution. In addition, your request handler can handle the request body, environment variables, the specific request method etc. (see request). Here though, we'll focus on parameters only.

You'll use set-param to set a parameter, which can then be obtained anywhere in the current request, including in the current handler's caller or callee. Use get-param to obtain a parameter that's set with set-param.

Parameters are very fast - they are static creatures implemented at compile time, meaning only fixed memory locations are used to store them (making for great CPU caching), and any name-based resolution is used only when necessary, and always with fast hash tables and static caching.

Calling one handler from another

In this article, we'll talk about call-handler which is used to call a handler from within another handler.