Takes a monadic value that constructs a HTML page and delivers this page to the browser. This page may contain forms and input widgets.

Terminates script by sending its argument to the browser.

Safe embedding of an IO action into the CGI monad. Intentionally not parameterized ver its monad to avoid its use inside of transactions.

Turns a CGI action into an IO action. Used to turn the main CGI action into the main function of the program. Typical use:

 main = run mainCGI

Turns a CGI action into an IO action. Used to turn the main CGI action into the main function of the program. Takes additional low-level options. Typical use:

 main = runWithOptions [] mainCGI

Brackets a CGI action so that only its result is visible. Improves efficiency by not executing the bracketed action after it has been performed once. Use this for avoiding the inefficient buildup of long interaction logs.

Repeats a CGI action without saving its state so that the size of the interaction log remains constant.

Control operator for the CGI monad. Its specification is

 callWithCurrentHistory (\backto x -> action x >>= backto) x
 ==
 action x >>= callWithCurrentHistory (\backto x -> action x >>= backto)

However, callWithCurrentHistory is more efficient because it avoids the buildup of long interaction logs by cutting back every time just before action gets executed.

Terminate script by sending a HTML page constructed by monadic argument.

Like ask, but passes the constructed HTML page to the elementAction parameter. This function may send the page via Email or store it into a file. Anyone loading this page in a browser can resume the interaction.

Reference to internal image.

Reference to image by URL.

Create an inline image.

Create a hyperlink to internal entity.

Create a popup hyperlink to internal entity.

Create hyperlink to internal entity /path?name.

Link to previous page in browser's history. Uses JavaScript.

Plain Hyperlink from an URL string.

Hyperlink that creates a named popup window from an URL string.

restart application.

create a standard XHTML page from a title string and body elements

create a standard XHTML page without heading from a title string and body elements

create a bare XHTML root tag with proper namespace attribute

create a standard XHTML page from a title string, a stylesheet URL and body elements

create an XHTML page with CSS reference but without heading from a title string, the URL of the stylesheet and body elements

Every input widget maps the content generator for the widget (which may produce HTML elements or attributes) to the content generator of the widget.

Wraps an HTML form around its arguments. All standard attributes are computed and need not be supplied explicitly.

Convenient workhorse. Takes the title of a page and a monadic HTML value for the contents of the page. Wraps the contents in a form so that input fields and buttons may be used inside.

Create a submission button with attached action.

Create a continuation button that takes no parameters.

Create a submission button whose attached action is fired whenever the form is submitted without explicitly clicking any submit button. This can happen if an input field has an attached onclick=submit() action.

Creates a reset button that clears all fields of a form.

Creates an input field that submits the field to the browser when data is entered into this field.

Attach a CGI action to the value returned by the input field. Activation means that data is submitted as soon as it is entered.

Create an ordinary link serving as a submission button.

Create a continuation link.

Create a submission button whose validation proceeds according to a decision tree. Trees are built using dtleaf and dtnode.

Abstract type of decisions trees. These trees provide structured validation.

Create a leaf in a decision tree from a CGI action.

Create a node in a decision tree. Takes an invalid input field and a continuation. Validates the input field and passes it to the continuation if the validation was successful. The continuation can dispatch on the value of the input field and produces a new decision tree.

Create a textual input field. Return type can be *anything* in class Reason and Read.

Create a textual input field that returns the string entered. (Avoids having to put quotes around a string.)

Creates a textual input field that takes a custom validation function.

Like inputField but the characters are not echoed on the screen.

Create a text area with a preset string.

Creates a checkbox. Returns True if box was checked.

Create a single button.

Create a handle for a new radio group. This handle is invisible on the screen!

Create a new radio button and attach it to an existing RadioGroup.

Create and place the error indicator for an existing RadioGroup. Becomes visible only if no button of a radio group is pressed.

Create an input field from an image. Returns (x,y) position clicked in the image.

Create a selection box where multiple entries can be selected.

Create a selection box where exactly one entry can be selected.

Selection box for elements of a Bounded type. Argument is the optional preselected value.

Creates a file input field. Returns a temporary FileReference. The fileReferenceName of the result is *not* guaranteed to be persistent. The application is responsible for filing it away at a safe place.

Creates a file input field. Like fileInputField but has an additional parameter for additional validation of the input.

Transform an IO action that produces a table in list form into a CGI action that returns an abstract table.

Access abstract table by row and column. Produces a test node in the document monad.

Create a selection group for a table. Selects one row.

Create a selection button for an abstract table

Create a labelled selection display for an abstract table. The display function takes the button element and a list of text nodes corresponding to the selected row and is expected to perform the layout.

Create a choice group for a table (0-*).

Create one choice button for an abstract table

Create a labelled choice display for an abstract table. The display function takes the button element and a list of text nodes corresponding to the selected row and is expected to perform the layout.

FL is required to pass an unknown number of handles of the same type need to the callback function in a form submission. The handles need to be collected in a list and then wrapped in the FL data constructor

FA comes handy when you want to tag an input handle with some extra information, which is not itsefl an input handle and which is not validated by a form submission. The tag is the first argument and the handle is the second argument of the data constructor.

create a virtual input field from the concatenation of two input fields

Create a virtual input field from the result of applying a function to two input fields. Parsing is applied to the result of the function call.

Create a SIZE attribute from an Int.

Create a MAXLENGTH attribute from an Int.

Create a VALUE attribute from any Showable.

Variant of run where an additional argument cgigen specifies an action taken when the script is invoked with a non-empty query string as in script-name?query-string

A translator is a function [String] -> CGI (). It takes the query string of the URL (of type [String]) and translates it into a CGI action. docTranslator docs next takes a list of FreeForm documents and a next translator. It tries to select a document by its ffName and falls through to the next translator if no document matches.

Terminates a sequence of translators.

Arbitrary string data. No quotes required.

Non-empty strings.

Non-empty strings of digits.

Phone numbers.

Reads an email address according to RFC 2822

Reads a credit card number and performs Luhn check on it.

Reads credit card expiration dates in format /.

A Password is a string of length >= 8 with characters taken from at least three of the four sets: lower case characters, upper case characters, digits, and special characters.

Data type for transforming a field into an optional one. The Read syntax of Absent is the empty string, whereas the Read syntax of Present a is just the Read syntax of a. Analogously for Show.

Transform a CGI action into a servlet suitable for running from Marlow's web server.

Like makeServlet with additional CGI generator as in runWithHook.

Abstract data type of frame set generators.

Overall layout of a frame set: row-wise or column-wise.

Division of space between elements of a frameset. See http://wp.netscape.com/assist/net_sites/frame_syntax.html

Create a single frame. Returns the assigned name of the frame.

Create a frameset, given a layout, its spacing, and its subframe(set)s.

Required wrapper for pages with frames. Takes a title and a FrameSet generator and displays the page.