Scriptable Form Editor 1 (Default branch)

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html::form

HTML::Form(3)						User Contributed Perl Documentation					     HTML::Form(3)

NAME

       HTML::Form - Class that represents HTML forms

SYNOPSIS

	use HTML::Form;
	$form = HTML::Form->parse($html, $base_uri);
	$form->value(query => "Perl");

	use LWP;
	LWP::UserAgent->new->request($form->click);

DESCRIPTION

       Objects of the "HTML::Form" class represents a single HTML <form> ... </form> instance.	A form consist of a sequence of inputs that usu-
       ally have names, and which can take on various values.

       The following methods are available:

       $form = HTML::Form->new($method, $action_uri, [[$enctype], $input,...])
	   The constructor takes a $method and a $uri as argument.  The $enctype and and initial inputs are optional.  You will normally use
	   HTML::Form->parse() to create new HTML::Form objects.

       @forms = HTML::Form->parse($html_document, $base_uri)
	   The parse() class method will parse an HTML document and build up "HTML::Form" objects for each <form> found.  If called in scalar con-
	   text only returns the first <form>.	Returns an empty list if there are no forms to be found.

	   The $base_uri is (usually) the URI used to access the $html_document.  It is needed to resolve relative action URIs.  For LWP this
	   parameter is obtained from the $response->base() method.

       $form->push_input($type, \%attr)
	   Adds a new input to the form.

       $form->method( [$new] )
       $form->action( [$new] )
       $form->enctype( [$new] )
	   These method can be used to get/set the corresponding attribute of the form.

       $form->inputs
	   This method returns the list of inputs in the form.

       $form->find_input($name, $type, $no)
	   This method is used to locate some specific input within the form.  At least one of the arguments must be defined.  If no matching
	   input is found, "undef" is returned.

	   If $name is specified, then the input must have the indicated name.	If $type is specified then the input must have the specified type.
	   In addition to the types possible for <input> HTML tags, we also have "textarea" and "option".  The $no is the sequence number of the
	   input with the indicated $name and/or $type (where 1 is the first).

       $form->value($name, [$value])
	   The value() method can be used to get/set the value of some input.  If no input have the indicated name, then this method will croak.

       $form->try_others(&callback)
	   This method will iterate over all permutations of unvisited enumerated values (<select>, <radio>, <checkbox>) and invoke the callback
	   for each.  The callback is passed the $form as argument.

       $form->make_request
	   Will return a HTTP::Request object that reflects the current setting of the form.  You might want to use the click method instead.

       $form->click([$name], [$x, $y])
	   Will click on the first clickable input ("input/submit" or "input/image"), with the indicated $name, if specified.  You can optinally
	   specify a coordinate clicked, which only makes a difference if you clicked on an image.  The default coordinate is (1,1).

       $form->form
	   Returns the current setting as a sequence of key/value pairs.

       $form->dump
	   Returns a textual representation of the form.  Mainly useful for debugging.	If called in void context, then the dump is printed on
	   STDERR.

INPUTS

       An "HTML::Form" contains a sequence of inputs.  References to the inputs can be obtained with the $form->inputs or $form->find_input meth-
       ods.  Once you have such a reference, then one of the following methods can be used on it:

       $input->type
	   Returns the type of this input.  Types are stuff like "text", "password", "hidden", "textarea", "image", "submit", "radio", "checkbox",
	   "option"...

       $input->name([$new])
       $input->value([$new])
	   These methods can be used to set/get the current name or value of an input.	If the input only can take an enumerated list of values,
	   then it is an error to try to set it to something else and the method will croak if you try.

       $input->possible_values
	   Returns a list of all values that and input can take.  For inputs that does not have discrete values this returns an empty list.

       $input->other_possible_values
	   Returns a list of all values not tried yet.

       $input->form_name_value
	   Returns a (possible empty) list of key/value pairs that should be incorporated in the form value from this input.

       $input->click($form, $x, $y)
	   Some input types (currently "sumbit" buttons and "images") can be clicked to submit the form.  The click() method returns the
	   corrsponding "HTTP::Request" object.

SEE ALSO

       LWP, HTML::Parser, webchatpp

COPYRIGHT

       Copyright 1998-2000 Gisle Aas.

       This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

libwww-perl-5.65						    2001-08-01							     HTML::Form(3)

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