Module "HtmlCgi.curry"

Library to support CGI programming in the HTML library. It is only intended as an auxiliary library to implement dynamic web pages according to the HTML library. It contains a simple script that is installed for a dynamic web page and which sends the user input to the real application server implementing the application.

Author: Michael Hanus

Version: November 2007

Datatypes:
CgiServerMsg

Constructors:
CgiSubmit | CleanServer | GetLoad | ShowStatus | SketchHandlers | SketchStatus | StopCgiServer

Functions:
cgiServerRegistry | noHandlerPage | readCgiServerMsg | registerCgiServer | runCgiServerCmd | unregisterCgiServer

readCgiServerMsg  :: Handle -> IO (Maybe CgiServerMsg)              Reads a line from a handle and check whether it is a syntactically correct cgi server message.

runCgiServerCmd  :: String -> CgiServerMsg -> IO ()              Executes a specific command for a cgi server.

noHandlerPage  :: String -> String -> String

cgiServerRegistry  :: String              The name of the file to register all cgi servers.

registerCgiServer  :: String -> String -> IO ()

unregisterCgiServer  :: String -> IO ()

CgiServerMsg

The messages to comunicate between the cgi script and the server program. CgiSubmit env cgienv nextpage - pass the environment and show next page, where env are the values of the environment variables of the web script (e.g., QUERY_STRING, REMOTE_HOST, REMOTE_ADDR), cgienv are the values in the current form submitted by the client, and nextpage is the answer text to be shown in the next web page

Constructors:

CgiSubmit :: [(String,String)] -> [(String,String)] -> CgiServerMsg

GetLoad :: CgiServerMsg

GetLoad - get info about the current load of the server process

SketchStatus :: CgiServerMsg

SketchStatus - get a sketch of the status of the server

SketchHandlers :: CgiServerMsg

SketchHandlers - get a sketch of all event handlers of the server

ShowStatus :: CgiServerMsg

ShowStatus - show the status of the server with all event handlers

CleanServer :: CgiServerMsg

CleanServer - clean up the server (with possible termination)

StopCgiServer :: CgiServerMsg

StopCgiServer - stop the server

Reads a line from a handle and check whether it is a syntactically correct cgi server message.

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runCgiServerCmd :: String -> CgiServerMsg -> IO ()   

Executes a specific command for a cgi server.

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noHandlerPage :: String -> String -> String   

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cgiServerRegistry :: String   

The name of the file to register all cgi servers.

Further infos:

• solution complete, i.e., able to compute all solutions

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registerCgiServer :: String -> String -> IO ()   

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unregisterCgiServer :: String -> IO ()   

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