Web Server: PLT HTTP Server

1`` | Running the Web Server
2`` | Scheme Servlets
3`` | Web Language Servlets
4`` | Configuration
5`` | Dispatchers
6`` | Web Config Unit
7`` | Web Server Unit
8`` | Continuation Managers
9`` | Internal
10`` | Troubleshooting
11`` | Acknowledgements
| Index

On this page:

make-web-parameter
web-parameter?
web-parameterize

Version: 4.0.2
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#### 3.8`` Web Parameters

(require web-server/lang/web-param)

As mentioned earlier, it is not easy to use parameterize in the Web Language. "lang/web-param.ss" provides (roughly) the same functionality in a way that is serializable. Like other serializable things in the Web Language, they are sensitive to source code modification.

(make-web-parameter default)

Expands to the definition of a web-parameter with default as the default value. A web-parameter is a procedure that, when called with zero arguments, returns default or the last value web-parameterized in the dynamic context of the call.

(web-parameter? v) → boolean?
v : any/c

Checks if v appears to be a web-parameter.

(web-parameterize ([web-parameter-expr value-expr] ...) expr ...)

Runs (begin expr ...) such that the web-parameters that the web-parameter-exprs evaluate to are bound to the value-exprs. From the perspective of the value-exprs, this is like let.

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