hsp-0.4.5: Haskell Server Pages is a library for writing dynamic server-side web pages. Source code Contents Index

HSP.Env.Request Portability Haskell 98 Stability experimental Maintainer Niklas Broberg, nibro@cs.chalmers.se

Description

An interface to a request object as held in the HSP environment.

Synopsis

data Request = Request { getParameterL :: String -> [String] getHeaders :: [(String, String)] } getParameter :: Request -> String -> Maybe String getParameter_ :: Request -> String -> String readParameter :: Read a => Request -> String -> Maybe a readParameterL :: Read a => Request -> String -> [a] readParameter_ :: Read a => Request -> String -> a

Documentation

data Request Source

A record representing an interface to an HTTP request. This allows us to use many different underlying types for these requests, all we need is to supply conversions to this interface. This is useful for when we run as CGI, or when we run inside a server app. Constructors Request getParameterL :: String -> [String] getHeaders :: [(String, String)]

getParameter :: Request -> String -> Maybe String Source

Get a parameter from the request query string (GET) or body (POST). | Returns Nothing if the parameter is not set.

getParameter_ :: Request -> String -> String Source

Unsafe version of getParameter, essentially fromJust.(getParameter r) but throws a ParameterLookupFailed exception if the parameter is not set.

readParameter :: Read a => Request -> String -> Maybe a Source

Return a value instead of a string.

readParameterL :: Read a => Request -> String -> [a] Source

Return a list of values read from their string representations.

readParameter_ :: Read a => Request -> String -> a Source

Unsafe version of readParameter

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