--- /dev/null
+package CGI::Ajax;
+use strict;
+use Data::Dumper;
+use base qw(Class::Accessor);
+use overload '""' => 'show_javascript'; # for building web pages, so
+ # you can just say: print $pjx
+BEGIN {
+ use vars qw ($VERSION @ISA @METHODS);
+ @METHODS = qw(url_list coderef_list DEBUG JSDEBUG html
+ js_encode_function cgi_header_extra);
+
+ CGI::Ajax->mk_accessors( @METHODS );
+
+ $VERSION = .697;
+}
+
+########################################### main pod documentation begin ##
+
+=head1 NAME
+
+CGI::Ajax - a perl-specific system for writing Asynchronous web
+applications
+
+=head1 SYNOPSIS
+
+ use strict;
+ use CGI; # or any other CGI:: form handler/decoder
+ use CGI::Ajax;
+
+ my $cgi = new CGI;
+ my $pjx = new CGI::Ajax( 'exported_func' => \&perl_func );
+
+ print $pjx->build_html( $cgi, \&Show_HTML);
+
+ sub perl_func {
+ my $input = shift;
+ # do something with $input
+ my $output = $input . " was the input!";
+ return( $output );
+ }
+
+ sub Show_HTML {
+ my $html = <<EOHTML;
+ <HTML>
+ <BODY>
+ Enter something:
+ <input type="text" name="val1" id="val1"
+ onkeyup="exported_func( ['val1'], ['resultdiv'] );">
+ <br>
+ <div id="resultdiv"></div>
+ </BODY>
+ </HTML>
+ EOHTML
+ return $html;
+ }
+
+I<There are several fully-functional examples in the 'scripts/'
+directory of the distribution.>
+
+=head1 DESCRIPTION
+
+CGI::Ajax is an object-oriented module that provides a unique
+mechanism for using perl code asynchronously from javascript-
+enhanced HTML pages. CGI::Ajax unburdens the user from having to
+write extensive javascript, except for associating an exported
+method with a document-defined event (such as onClick, onKeyUp,
+etc). CGI::Ajax also mixes well with HTML containing more complex
+javascript.
+
+CGI::Ajax supports methods that return single results or multiple
+results to the web page, and supports returning values to multiple
+DIV elements on the HTML page.
+
+Using CGI::Ajax, the URL for the HTTP GET/POST request is
+automatically generated based on HTML layout and events, and the
+page is then dynamically updated with the output from the perl
+function. Additionally, CGI::Ajax supports mapping URL's to a
+CGI::Ajax function name, so you can separate your code processing
+over multiple scripts.
+
+Other than using the Class::Accessor module to generate CGI::Ajax'
+accessor methods, CGI::Ajax is completely self-contained - it
+does not require you to install a larger package or a full Content
+Management System, etc.
+
+We have added I<support> for other CGI handler/decoder modules,
+like L<CGI::Simple> or L<CGI::Minimal>, but we can't test these
+since we run mod_perl2 only here. CGI::Ajax checks to see if a
+header() method is available to the CGI object, and then uses it.
+If method() isn't available, it creates it's own minimal header.
+
+A primary goal of CGI::Ajax is to keep the module streamlined and
+maximally flexible. We are trying to keep the generated javascript
+code to a minimum, but still provide users with a variety of
+methods for deploying CGI::Ajax. And VERY little user javascript.
+
+=head1 EXAMPLES
+
+The CGI::Ajax module allows a Perl subroutine to be called
+asynchronously, when triggered from a javascript event on the
+HTML page. To do this, the subroutine must be I<registered>,
+usually done during:
+
+ my $pjx = new CGI::Ajax( 'JSFUNC' => \&PERLFUNC );
+
+This maps a perl subroutine (PERLFUNC) to an automatically
+generated Javascript function (JSFUNC). Next you setup a trigger this
+function when an event occurs (e.g. "onClick"):
+
+ onClick="JSFUNC(['source1','source2'], ['dest1','dest2']);"
+
+where 'source1', 'dest1', 'source2', 'dest2' are the DIV ids of
+HTML elements in your page...
+
+ <input type=text id=source1>
+ <input type=text id=source2>
+ <div id=dest1></div>
+ <div id=dest2></div>
+
+L<CGI::Ajax> sends the values from source1 and source2 to your
+Perl subroutine and returns the results to dest1 and dest2.
+
+=head2 4 Usage Methods
+
+=over 4
+
+=item 1 Standard CGI::Ajax example
+
+Start by defining a perl subroutine that you want available from
+javascript. In this case we'll define a subrouting that determines
+whether or not an input is odd, even, or not a number (NaN):
+
+ use strict;
+ use CGI::Ajax;
+ use CGI;
+
+
+ sub evenodd_func {
+ my $input = shift;
+
+ # see if input is defined
+ if ( not defined $input ) {
+ return("input not defined or NaN");
+ }
+
+ # see if value is a number (*thanks Randall!*)
+ if ( $input !~ /\A\d+\z/ ) {
+ return("input is NaN");
+ }
+
+ # got a number, so mod by 2
+ $input % 2 == 0 ? return("EVEN") : return("ODD");
+ }
+
+Alternatively, we could have used coderefs to associate an
+exported name...
+
+ my $evenodd_func = sub {
+ # exactly the same as in the above subroutine
+ };
+
+Next we define a function to generate the web page - this can
+be done many different ways, and can also be defined as an
+anonymous sub. The only requirement is that the sub send back
+the html of the page. You can do this via a string containing the
+html, or from a coderef that returns the html, or from a function
+(as shown here)...
+
+ sub Show_HTML {
+ my $html = <<EOT;
+ <HTML>
+ <HEAD><title>CGI::Ajax Example</title>
+ </HEAD>
+ <BODY>
+ Enter a number:
+ <input type="text" name="somename" id="val1" size="6"
+ OnKeyUp="evenodd( ['val1'], ['resultdiv'] );">
+ <br>
+ <hr>
+ <div id="resultdiv">
+ </div>
+ </BODY>
+ </HTML>
+EOT
+ return $html;
+ }
+
+The exported Perl subrouting is triggered using the C<OnKeyUp>
+event handler of the input HTML element. The subroutine takes one
+value from the form, the input element B<'val1'>, and returns the
+the result to an HTML div element with an id of B<'resultdiv'>.
+Sending in the input id in an array format is required to support
+multiple inputs, and similarly, to output multiple the results,
+you can use an array for the output divs, but this isn't mandatory -
+as will be explained in the B<Advanced> usage.
+
+Now create a CGI object and a CGI::Ajax object, associating a reference
+to our subroutine with the name we want available to javascript.
+
+ my $cgi = new CGI();
+ my $pjx = new CGI::Ajax( 'evenodd' => \&evenodd_func );
+
+And if we used a coderef, it would look like this...
+
+ my $pjx = new CGI::Ajax( 'evenodd' => $evenodd_func );
+
+Now we're ready to print the output page; we send in the cgi
+object and the HTML-generating function.
+
+ print $pjx->build_html($cgi,\&Show_HTML);
+
+CGI::Ajax has support for passing in extra HTML header information
+to the CGI object. This can be accomplished by adding a third
+argument to the build_html() call. The argument needs to be a
+hashref containing Key=>value pairs that CGI objects understand:
+
+ print $pjx->build_html($cgi,\&Show_HTML,
+ {-charset=>'UTF-8, -expires=>'-1d'});
+
+See L<CGI> for more header() method options.
+
+That's it for the CGI::Ajax standard method. Let's look at
+something more advanced.
+
+=item 2 Advanced CGI::Ajax example
+
+Let's say we wanted to have a perl subroutine process multiple
+values from the HTML page, and similarly return multiple values
+back to distinct divs on the page. This is easy to do, and
+requires no changes to the perl code - you just create it as you
+would any perl subroutine that works with multiple input values
+and returns multiple values. The significant change happens in
+the event handler javascript in the HTML...
+
+ onClick="exported_func(['input1','input2'],['result1','result2']);"
+
+Here we associate our javascript function ("exported_func") with
+two HTML element ids ('input1','input2'), and also send in two
+HTML element ids to place the results in ('result1','result2').
+
+=item 3 Sending Perl Subroutine Output to a Javascript function
+
+Occassionally, you might want to have a custom javascript function
+process the returned information from your Perl subroutine.
+This is possible, and the only requierment is that you change
+your event handler code...
+
+ onClick="exported_func(['input1'],[js_process_func]);"
+
+In this scenario, C<js_process_func> is a javascript function you
+write to take the returned value from your Perl subroutine and
+process the results. I<Note that a javascript function is not
+quoted -- if it were, then CGI::Ajax would look for a HTML element
+with that id.> Beware that with this usage, B<you are responsible
+for distributing the results to the appropriate place on the
+HTML page>. If the exported Perl subroutine returns, e.g. 2
+values, then C<js_process_func> would need to process the input
+by working through an array, or using the javascript Function
+C<arguments> object.
+
+ function js_process_func() {
+ var input1 = arguments[0]
+ var input2 = arguments[1];
+ // do something and return results, or set HTML divs using
+ // innerHTML
+ document.getElementById('outputdiv').innerHTML = input1;
+ }
+
+=item 4 URL/Outside Script CGI::Ajax example
+
+There are times when you may want a different script to
+return content to your page. This could be because you have
+an existing script already written to perform a particular
+task, or you want to distribute a part of your application to another
+script. This can be accomplished in L<CGI::Ajax> by using a URL in
+place of a locally-defined Perl subroutine. In this usage,
+you alter you creation of the L<CGI::Ajax> object to link an
+exported javascript function name to a local URL instead of
+a coderef or a subroutine.
+
+ my $url = 'scripts/other_script.pl';
+ my $pjx = new CGI::Ajax( 'external' => $url );
+
+This will work as before in terms of how it is called from you
+event handler:
+
+ onClick="external(['input1','input2'],['resultdiv']);"
+
+The other_script.pl will get the values via a CGI object and
+accessing the 'args' key. The values of the B<'args'> key will
+be an array of everything that was sent into the script.
+
+ my @input = $cgi->params('args');
+ $input[0]; # contains first argument
+ $input[1]; # contains second argument, etc...
+
+This is good, but what if you need to send in arguments to the
+other script which are directly from the calling Perl script,
+i.e. you want a calling Perl script's variable to be sent, not
+the value from an HTML element on the page? This is possible
+using the following syntax:
+
+ onClick="exported_func(['args__$input1','args__$input2'],
+ ['resultdiv']);"
+
+Similary, if the external script required a constant as input
+(e.g. C<script.pl?args=42>, you would use this syntax:
+
+ onClick="exported_func(['args__42'],['resultdiv']);"
+
+In both of the above examples, the result from the external
+script would get placed into the I<resultdiv> element on our
+(the calling script's) page.
+
+If you are sending more than one argument from an external perl
+script back to a javascript function, you will need to split the
+string (AJAX applications communicate in strings only) on something.
+Internally, we use '__pjx__', and this string is checked for. If
+found, L<CGI::Ajax> will automatically split it. However, if you
+don't want to use '__pjx__', you can do it yourself:
+
+For example, from your Perl script, you would...
+
+ return("A|B"); # join with "|"
+
+and then in the javascript function you would have something like...
+
+ process_func() {
+ var arr = arguments[0].split("|");
+ // arr[0] eq 'A'
+ // arr[1] eq 'B'
+ }
+
+In order to rename parameters, in case the outside script needs
+specifically-named parameters and not CGI::Ajax' I<'args'> default
+parameter name, change your event handler associated with an HTML
+event like this
+
+ onClick="exported_func(['myname__$input1','myparam__$input2'],
+ ['resultdiv']);"
+
+The URL generated would look like this...
+
+C<script.pl?myname=input1&myparam=input2>
+
+You would then retrieve the input in the outside script with this...
+
+ my $p1 = $cgi->params('myname');
+ my $p1 = $cgi->params('myparam');
+
+Finally, what if we need to get a value from our HTML page and we
+want to send that value to an outside script but the outside script
+requires a named parameter different from I<'args'>? You can
+accomplish this with L<CGI::Ajax> using the getVal() javascript
+method (which returns an array, thus the C<getVal()[0]> notation):
+
+ onClick="exported_func(['myparam__' + getVal('div_id')[0]],
+ ['resultdiv']);"
+
+This will get the value of our HTML element with and
+I<id> of I<div_id>, and submit it to the url attached to
+I<myparam__>. So if our exported handler referred to a URI
+called I<script/scr.pl>, and the element on our HTML page called
+I<div_id> contained the number '42', then the URL would look
+like this C<script/scr.pl?myparam=42>. The result from this
+outside URL would get placed back into our HTML page in the
+element I<resultdiv>. See the example script that comes with
+the distribution called I<pjx_url.pl> and its associated outside
+script I<convert_degrees.pl> for a working example.
+
+B<N.B.> These examples show the use of outside scripts which
+are other perl scripts - I<but you are not limited to Perl>!
+The outside script could just as easily have been PHP or any other
+CGI script, as long as the return from the other script is just
+the result, and not addition HTML code (like FORM elements, etc).
+
+=back
+
+=head2 GET versus POST
+
+Note that all the examples so far have used the following syntax:
+
+ onClick="exported_func(['input1'],['result1']);"
+
+There is an optional third argument to a L<CGI::Ajax> exported
+function that allows change the submit method. The above event could
+also have been coded like this...
+
+ onClick="exported_func(['input1'],['result1'], 'GET');"
+
+By default, L<CGI::Ajax> sends a I<'GET'> request. If you need it,
+for example your URL is getting way too long, you can easily switch
+to a I<'POST'> request with this syntax...
+
+ onClick="exported_func(['input1'],['result1'], 'POST');"
+
+I<('POST' and 'post' are supported)>
+
+=head2 Page Caching
+
+We have implemented a method to prevent page cacheing from undermining
+the AJAX methods in a page. If you send in an input argument to a
+L<CGI::Ajax>-exported function called 'NO_CACHE', the a special
+parameter will get attached to the end or your url with a random
+number in it. This will prevent a browser from caching your request.
+
+ onClick="exported_func(['input1','NO_CACHE'],['result1']);"
+
+The extra param is called pjxrand, and won't interfere with the order
+of processing for the rest of your parameters.
+
+=head1 METHODS
+
+=cut
+
+################################### main pod documentation end ##
+
+######################################################
+## METHODS - public ##
+######################################################
+
+=over 4
+
+=item build_html()
+
+ Purpose: Associates a cgi obj ($cgi) with pjx object, inserts
+ javascript into <HEAD></HEAD> element and constructs
+ the page, or part of the page. AJAX applications
+ are designed to update only the section of the
+ page that needs it - the whole page doesn't have
+ to be redrawn. L<CGI::Ajax> applications use the
+ build_html() method to take care of this: if the CGI
+ parameter C<fname> exists, then the return from the
+ L<CGI::Ajax>-exported function is sent to the page.
+ Otherwise, the entire page is sent, since without
+ an C<fname> param, this has to be the first time
+ the page is being built.
+
+ Arguments: The CGI object, and either a coderef, or a string
+ containing html. Optionally, you can send in a third
+ parameter containing information that will get passed
+ directly to the CGI object header() call.
+ Returns: html or updated html (including the header)
+ Called By: originating cgi script
+
+=cut
+sub build_html {
+ my ( $self, $cgi, $html_source, $cgi_header_extra ) = @_;
+
+ if ( ref( $cgi ) =~ /CGI.*/ ) {
+ if ( $self->DEBUG() ) {
+ print STDERR "CGI::Ajax->build_html: CGI* object was received\n";
+ }
+ $self->cgi( $cgi ); # associate the cgi obj with the CGI::Ajax object
+ }
+
+ if ( defined $cgi_header_extra ) {
+ if ( $self->DEBUG() ) {
+ print STDERR "CGI::Ajax->build_html: got extra cgi header info\n";
+ if ( ref($cgi_header_extra) eq "HASH" ) {
+ foreach my $k ( keys %$cgi_header_extra ) {
+ print STDERR "\t$k => ", $cgi_header_extra->{$k}, "\n";
+ }
+ } else {
+ print STDERR "\t$cgi_header_extra\n";
+ }
+ }
+ $self->cgi_header_extra( $cgi_header_extra );
+ }
+
+ #check if "fname" was defined in the CGI object
+ if ( defined $self->cgi()->param("fname") ) {
+ # it was, so just return the html from the handled request
+ return ( $self->handle_request() );
+ }
+ else {
+ # start with the minimum, a http header line and any extra cgi
+ # header params sent in
+ my $html = "";
+ if ( $self->cgi()->can('header') ) {
+ #$html .= $self->cgi()->header();
+ $html .= $self->cgi()->header( $self->cgi_header_extra() );
+ }
+ else {
+ # don't have an object with a "header()" method, so just create
+ # a mimimal one
+ $html .= "Content-Type: text/html;";
+ $html .= $self->cgi_header_extra();
+ $html .= "\n\n";
+ }
+
+ # check if the user sent in a coderef for generating the html,
+ # or the actual html
+ if ( ref($html_source) eq "CODE" ) {
+ if ( $self->DEBUG() ) {
+ print STDERR "CGI::Ajax->build_html: html_source is a CODEREF\n";
+ }
+ eval { $html .= &$html_source };
+ if ($@) {
+ # there was a problem evaluating the html-generating function
+ # that was sent in, so generate an error page
+ if ( $self->cgi()->can('header') ) {
+ $html = $self->cgi()->header( $self->cgi_header_extra() );
+ }
+ else {
+ # don't have an object with a "header()" method, so just create
+ # a mimimal one
+ $html = "Content-Type: text/html;";
+ $html .= $self->cgi_header_extra();
+ $html .= "\n\n";
+ }
+ $html .= qq!<html><head><title></title></head><body><h2>Problems</h2> with
+ the html-generating function sent to CGI::Ajax
+ object</body></html>!;
+ return $html;
+ }
+ $self->html($html); # no problems, so set html
+ }
+ else {
+ # user must have sent in raw html, so add it
+ if ( $self->DEBUG() ) {
+ print STDERR "CGI::Ajax->build_html: html_source is HTML\n";
+ }
+ $self->html( $html . $html_source );
+ }
+
+ # now modify the html to insert the javascript
+ $self->insert_js_in_head();
+ }
+ return $self->html();
+}
+
+=item show_javascript()
+
+ Purpose: builds the text of all the javascript that needs to be
+ inserted into the calling scripts html <head> section
+ Arguments:
+ Returns: javascript text
+ Called By: originating web script
+ Note: This method is also overridden so when you just print
+ a CGI::Ajax object it will output all the javascript needed
+ for the web page.
+
+=cut
+
+sub show_javascript {
+ my ($self) = @_;
+ my $rv = $self->show_common_js(); # show the common js
+
+ # build the js for each perl function you want exported to js
+ foreach my $func ( keys %{ $self->coderef_list() }, keys %{ $self->url_list() } ) {
+ $rv .= $self->make_function($func);
+ }
+ # wrap up the return in a CDATA structure for XML compatibility
+ # (thanks Thos Davis)
+ $rv = "\n" . '//<![CDATA[' . "\n" . $rv . "\n" . '//]]>' . "\n";
+ $rv = '<script type="text/javascript">' . $rv . '</script>';
+ return $rv;
+}
+
+## new
+sub new {
+ my ($class) = shift;
+ my $self = bless ({}, ref ($class) || $class);
+# $self->SUPER::new();
+ $self->JSDEBUG(0); # turn javascript debugging off (if on,
+ # extra info will be added to the web page output
+ # if set to 1, then the core js will get
+ # compressed, but the user-defined functions will
+ # not be compressed. If set to 2 (or anything
+ # greater than 1 or 0), then none of the
+ # javascript will get compressed.
+ #
+ $self->DEBUG(0); # turn debugging off (if on, check web logs)
+
+ #accessorized attributes
+ $self->coderef_list({});
+ $self->url_list({});
+ #$self->html("");
+ #$self->cgi();
+ #$self->cgi_header_extra(""); # set cgi_header_extra to an empty string
+
+ # setup a default endcoding; if you need support for international
+ # charsets, use 'escape' instead of encodeURIComponent. Due to the
+ # number of browser problems users report about scripts with a default of
+ # encodeURIComponent, we are setting the default to 'escape'
+ $self->js_encode_function('escape');
+
+ if ( @_ < 2 ) {
+ die "incorrect usage: must have fn=>code pairs in new\n";
+ }
+
+ while ( @_ ) {
+ my($function_name,$code) = splice( @_, 0, 2 );
+ if ( ref( $code ) eq "CODE" ) {
+ if ( $self->DEBUG() ) {
+ print STDERR "name = $function_name, code = $code\n";
+ }
+ # add the name/code to hash
+ $self->coderef_list()->{ $function_name } = $code;
+ } elsif ( ref($code) ) {
+ die "Unsuported code block/url\n";
+ } else {
+ if ( $self->DEBUG() ) {
+ print STDERR "Setting function $function_name to url $code\n";
+ }
+ # if it's a url, it is added here
+ $self->url_list()->{ $function_name } = $code;
+ }
+ }
+ return ($self);
+}
+
+######################################################
+## METHODS - private ##
+######################################################
+
+# sub cgiobj(), cgi()
+#
+# Purpose: accessor method to associate a CGI object with our
+# CGI::Ajax object
+# Arguments: a CGI object
+# Returns: CGI::Ajax objects cgi object
+# Called By: originating cgi script, or build_html()
+#
+sub cgiobj {
+ my $self = shift;
+ # see if any values were sent in...
+ if ( @_ ) {
+ my $cgi = shift;
+ # add support for other CGI::* modules This requires that your web server
+ # be configured properly. I can't test anything but a mod_perl2
+ # setup, so this prevents me from testing CGI::Lite,CGI::Simple, etc.
+ if ( ref($cgi) =~ /CGI.*/ ) {
+ if ( $self->DEBUG() ) {
+ print STDERR "cgiobj() received a CGI-like object ($cgi)\n";
+ }
+ $self->{'cgi'} = $cgi;
+ } else {
+ die "CGI::Ajax -- Can't set internal CGI object to a non-CGI object ($cgi)\n";
+ }
+ }
+ # return the object
+ return( $self->{'cgi'} );
+}
+
+sub cgi {
+ my $self = shift;
+ if ( @_ ) {
+ return( $self->cgiobj( @_ ) );
+ } else {
+ return( $self->cgiobj() );
+ }
+}
+
+## # sub cgi_header_extra
+## #
+## # Purpose: accessor method to associate CGI header information
+## # with the CGI::Ajax object
+## # Arguments: a hashref with key=>value pairs that get handed off to
+## # the CGI object's header() method
+## # Returns: hashref of extra cgi header params
+## # Called By: originating cgi script, or build_html()
+##
+## sub cgi_header_extra {
+## my $self = shift;
+## if ( @_ ) {
+## $self->{'cgi_header_extra'} = shift;
+## }
+## return( $self->{'cgi_header_extra'} );
+## }
+
+# sub create_js_setRequestHeader
+#
+# Purpose: create text of the header for the javascript side,
+# xmlhttprequest call
+# Arguments: none
+# Returns: text of header to pass to xmlhttpreq call so it will
+# match whatever was setup for the main web-page
+# Called By: originating cgi script, or build_html()
+#
+
+sub create_js_setRequestHeader {
+ my $self = shift;
+ my $cgi_header_extra = $self->cgi_header_extra();
+ my $js_header_string = q{r.setRequestHeader("};
+ #$js_header_string .= $self->cgi()->header( $cgi_header_extra );
+ $js_header_string .= $self->cgi()->header();
+ $js_header_string .= q{");};
+ #if ( ref $cgi_header_extra eq "HASH" ) {
+ # foreach my $k ( keys(%$cgi_header_extra) ) {
+ # $js_header_string .= $self->cgi()->header($cgi_headers)
+ # }
+ #} else {
+ #print STDERR $self->cgi()->header($cgi_headers) ;
+
+ if ( $self->DEBUG() ) {
+ print STDERR "js_header_string is (", $js_header_string, ")\n";
+ }
+
+ return($js_header_string);
+}
+
+# sub show_common_js()
+#
+# Purpose: create text of the javascript needed to interface with
+# the perl functions
+# Arguments: none
+# Returns: text of common javascript subroutine, 'do_http_request'
+# Called By: originating cgi script, or build_html()
+#
+
+sub show_common_js {
+ my $self = shift;
+ my $encodefn = $self->js_encode_function();
+ my $decodefn = $encodefn;
+ $decodefn =~ s/^(en)/de/;
+ $decodefn =~ s/^(esc)/unesc/;
+ #my $request_header_str = $self->create_js_setRequestHeader();
+ my $request_header_str = "";
+ my $rv = <<EOT;
+var ajax = [];
+function pjx(args,fname,method) {
+ this.target=args[1];
+ this.args=args[0];
+ method=(method)?method:'GET';
+ if(method=='post'){method='POST';}
+ this.method = method;
+ this.r=ghr();
+ this.url = this.getURL(fname);
+}
+
+function formDump(){
+ var all = [];
+ var fL = document.forms.length;
+ for(var f = 0;f<fL;f++){
+ var els = document.forms[f].elements;
+ for(var e in els){
+ var tmp = (els[e].id != undefined)? els[e].id : els[e].name;
+ if(typeof tmp != 'string'){continue;}
+ if(tmp){ all[all.length]=tmp}
+ }
+ }
+ return all;
+}
+function getVal(id) {
+ if (id.constructor == Function ) { return id(); }
+ if (typeof(id)!= 'string') { return id; }
+ var element = document.getElementById(id) || document.forms[0].elements[id];
+ if(!element){
+ alert('ERROR: Cant find HTML element with id or name: ' +
+ id+'. Check that an element with name or id='+id+' exists');
+ return 0;
+ }
+ if(element.type == 'select-one') {
+ if(element.selectedIndex == -1) return;
+ var item = element[element.selectedIndex];
+ return item.value || item.text
+ }
+ if (element.type == 'select-multiple') {
+ var ans = [];
+ var k =0;
+ for (var i=0;i<element.length;i++) {
+ if (element[i].selected || element[i].checked ) {
+ ans[k++]= element[i].value || element[i].text;
+ }
+ }
+ return ans;
+ }
+
+ if(element.type == 'radio' || element.type == 'checkbox'){
+ var ans =[];
+ var elms = document.getElementsByTagName('input');
+ var endk = elms.length;
+ var i =0;
+ for(var k=0;k<endk;k++){
+ if(elms[k].type== element.type && elms[k].checked && elms[k].id==id){
+ ans[i++]=elms[k].value;
+ }
+ }
+ return ans;
+ }
+ if( element.value == undefined ){
+ return element.innerHTML;
+ }else{
+ return element.value;
+ }
+}
+function fnsplit(arg) {
+ var url="";
+ if(arg=='NO_CACHE'){return '&pjxrand='+Math.random()}
+ if((typeof(arg)).toLowerCase() == 'object'){
+ for(var k in arg){
+ url += '&' + k + '=' + arg[k];
+ }
+ }else if (arg.indexOf('__') != -1) {
+ arga = arg.split(/__/);
+ url += '&' + arga[0] +'='+ $encodefn(arga[1]);
+ } else {
+ var res = getVal(arg) || '';
+ if(res.constructor != Array){ res = [res] }
+ for(var i=0;i<res.length;i++) {
+ url += '&args=' + $encodefn(res[i]) + '&' + arg + '=' + $encodefn(res[i]);
+ }
+ }
+ return url;
+}
+
+pjx.prototype = {
+ send2perl : function(){
+ var r = this.r;
+ var dt = this.target;
+ this.pjxInitialized(dt);
+ var url=this.url;
+ var postdata;
+ if(this.method=="POST"){
+ var idx=url.indexOf('?');
+ postdata = url.substr(idx+1);
+ url = url.substr(0,idx);
+ }
+ r.open(this.method,url,true);
+ $request_header_str;
+ if(this.method=="POST"){
+ r.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
+ r.send(postdata);
+ }
+ if(this.method=="GET"){
+ r.send(null);
+ }
+ r.onreadystatechange = handleReturn;
+ },
+ pjxInitialized : function(){},
+ pjxCompleted : function(){},
+ readyState4 : function(){
+ var rsp = $decodefn(this.r.responseText); /* the response from perl */
+ var splitval = '__pjx__'; /* to split text */
+ /* fix IE problems with undef values in an Array getting squashed*/
+ rsp = rsp.replace(splitval+splitval+'g',splitval+" "+splitval);
+ var data = rsp.split(splitval);
+ dt = this.target;
+ if (dt.constructor != Array) { dt=[dt]; }
+ if (data.constructor != Array) { data=[data]; }
+ if (typeof(dt[0])!='function') {
+ for ( var i=0; i<dt.length; i++ ) {
+ var div = document.getElementById(dt[i]);
+ if (div.type =='text' || div.type=='textarea' || div.type=='hidden' ) {
+ div.value=data[i];
+ } else{
+ div.innerHTML = data[i];
+ }
+ }
+ } else if (typeof(dt[0])=='function') {
+ dt[0].apply(this,data);
+ }
+ this.pjxCompleted(dt);
+ },
+
+ getURL : function(fname) {
+ var args = this.args;
+ var url= 'fname=' + fname;
+ for (var i=0;i<args.length;i++) {
+ url=url + args[i];
+ }
+ return url;
+ }
+};
+
+handleReturn = function() {
+ for( var k=0; k<ajax.length; k++ ) {
+ if (ajax[k].r==null) { ajax.splice(k--,1); continue; }
+ if ( ajax[k].r.readyState== 4) {
+ ajax[k].readyState4();
+ ajax.splice(k--,1);
+ continue;
+ }
+ }
+};
+
+var ghr=getghr();
+function getghr(){
+ if(typeof XMLHttpRequest != "undefined")
+ {
+ return function(){return new XMLHttpRequest();}
+ }
+ var msv= ["Msxml2.XMLHTTP.7.0", "Msxml2.XMLHTTP.6.0",
+ "Msxml2.XMLHTTP.5.0", "Msxml2.XMLHTTP.4.0", "MSXML2.XMLHTTP.3.0",
+ "MSXML2.XMLHTTP", "Microsoft.XMLHTTP"];
+ for(var j=0;j<=msv.length;j++){
+ try
+ {
+ A = new ActiveXObject(msv[j]);
+ if(A){
+ return function(){return new ActiveXObject(msv[j]);}
+ }
+ }
+ catch(e) { }
+ }
+ return false;
+}
+
+
+function jsdebug(){
+ var tmp = document.getElementById('pjxdebugrequest').innerHTML = "<br><pre>";
+ for( var i=0; i < ajax.length; i++ ) {
+ tmp += '<a href= '+ ajax[i].url +' target=_blank>' +
+ decodeURI(ajax[i].url) + ' </a><br>';
+ }
+ document.getElementById('pjxdebugrequest').innerHTML = tmp + "</pre>";
+}
+
+EOT
+
+ if ( $self->JSDEBUG() <= 1 ) {
+ $rv = $self->compress_js($rv);
+ }
+
+ return($rv);
+}
+
+# sub compress_js()
+#
+# Purpose: searches the javascript for newlines and spaces and
+# removes them (if a newline) or shrinks them to a single (if
+# space).
+# Arguments: javascript to compress
+# Returns: compressed js string
+# Called By: show_common_js(),
+#
+
+sub compress_js {
+ my($self,$js) = @_;
+ return if not defined $js;
+ return if $js eq "";
+ $js =~ s/\n//g; # drop newlines
+ $js =~ s/\s+/ /g; # replace 1+ spaces with just one space
+ return $js;
+}
+
+
+# sub insert_js_in_head()
+#
+# Purpose: searches the html value in the CGI::Ajax object and inserts
+# the ajax javascript code in the <script></script> section,
+# or if no such section exists, then it creates it. If
+# JSDEBUG is set, then an extra div will be added and the
+# url wil be desplayed as a link
+# Arguments: none
+# Returns: none
+# Called By: build_html()
+#
+
+sub insert_js_in_head{
+ my $self = shift;
+ my $mhtml = $self->html();
+ my $newhtml;
+ my @shtml;
+ my $js = $self->show_javascript();
+
+ if ( $self->JSDEBUG() ) {
+ my $showurl=qq!<br/><div id='pjxdebugrequest'></div><br/>!;
+ # find the terminal </body> so we can insert just before it
+ my @splith = $mhtml =~ /(.*)(<\s*\/\s*body[^>]*>?)(.*)/is;
+ $mhtml = $splith[0].$showurl.$splith[1].$splith[2];
+ }
+
+ # see if we can match on <head>
+ @shtml= $mhtml =~ /(.*)(<\s*head[^>]*>?)(.*)/is;
+ if ( @shtml ) {
+ # yes, there's already a <head></head>, so let's insert inside it,
+ # at the beginning
+ $newhtml = $shtml[0].$shtml[1].$js.$shtml[2];
+ } elsif( @shtml= $mhtml =~ /(.*)(<\s*html[^>]*>?)(.*)/is){
+ # there's no <head>, so look for the <html> tag, and insert out
+ # javascript inside that tag
+ $newhtml = $shtml[0].$shtml[1].$js.$shtml[2];
+ } else {
+ $newhtml .= "<html><head>";
+ $newhtml .= $js;
+ $newhtml .= "</head><body>";
+ $newhtml .= "No head/html tags, nowhere to insert. Returning javascript anyway<br>";
+ $newhtml .= "</body></html>";
+ }
+ $self->html($newhtml);
+ return;
+}
+
+# sub handle_request()
+#
+# Purpose: makes sure a fname function name was set in the CGI
+# object, and then tries to eval the function with
+# parameters sent in on args
+# Arguments: none
+# Returns: the result of the perl subroutine, as text; if multiple
+# arguments are sent back from the defined, exported perl
+# method, then join then with a connector (__pjx__).
+# Called By: build_html()
+#
+
+sub handle_request {
+ my ($self) = shift;
+
+ my $result; # $result takes the output of the function, if it's an
+ # array split on __pjx__
+ my @other = (); # array for catching extra parameters
+
+ # we need to access "fname" in the form from the web page, so make
+ # sure there is a CGI object defined
+ return undef unless defined $self->cgi();
+
+ my $rv = "";
+ if ( $self->cgi()->can('header') ) {
+ $rv = $self->cgi()->header( $self->cgi_header_extra() );
+ } else {
+ # don't have an object with a "header()" method, so just create
+ # a mimimal one
+ $rv = "Content-Type: text/html;";
+ # TODO:
+ $rv .= $self->cgi_header_extra();
+ $rv .= "\n\n";
+ }
+
+ # get the name of the function
+ my $func_name = $self->cgi()->param("fname");
+
+ # check if the function name was created
+ if ( defined $self->coderef_list()->{$func_name} ) {
+ my $code = $self->coderef_list()->{$func_name};
+
+ # eval the code from the coderef, and append the output to $rv
+ if ( ref($code) eq "CODE" ) {
+ eval { ($result, @other) = $code->( $self->cgi()->param("args") ) };
+
+ if ($@) {
+ # see if the eval caused and error and report it
+ # Should we be more severe and die?
+ if ( $self->DEBUG() ) {
+ print STDERR "Problem with code: $@\n";
+ }
+ }
+
+ if( @other ) {
+ $rv .= join( "__pjx__", ($result, @other) );
+ if ( $self->DEBUG() ) {
+ print STDERR "rv = $rv\n";
+ }
+ } else {
+ if ( defined $result ) {
+ $rv .= $result;
+ }
+ }
+
+ } # end if ref = CODE
+ } else {
+ # # problems with the URL, return a CGI rrror
+ print STDERR "POSSIBLE SECURITY INCIDENT! Browser from ", $self->cgi()->remote_addr();
+ print STDERR "\trequested URL: ", $self->cgi()->url();
+ print STDERR "\tfname request: ", $self->cgi()->param('fname');
+ print STDERR " -- returning Bad Request status 400\n";
+ if ( $self->cgi()->can('header') ) {
+ return($self->cgi()->header( -status=>'400' ));
+ } else {
+ # don't have an object with a "header()" method, so just create
+ # a mimimal one with 400 error
+ $rv = "Status: 400\nContent-Type: text/html;\n\n";
+ }
+ }
+ return $rv;
+}
+
+
+# sub make_function()
+#
+# Purpose: creates the javascript wrapper for the underlying perl
+# subroutine
+# Arguments: CGI object from web form, and the name of the perl
+# function to export to javascript, or a url if the
+# function name refers to another cgi script
+# Returns: text of the javascript-wrapped perl subroutine
+# Called By: show_javascript; called once for each registered perl
+# subroutine
+#
+
+sub make_function {
+ my ($self, $func_name ) = @_;
+ return("") if not defined $func_name;
+ return("") if $func_name eq "";
+ my $rv = "";
+ my $script = $0 || $ENV{SCRIPT_FILENAME};
+ $script =~ s/.*[\/|\\](.+)$/$1/;
+ my $outside_url = $self->url_list()->{ $func_name };
+ my $url = defined $outside_url ? $outside_url : $script;
+ if ($url =~ /\?/) { $url.='&'; } else {$url.='?'}
+ $url = "'$url'";
+ my $jsdebug = "";
+ if ( $self->JSDEBUG()) {
+ $jsdebug = "jsdebug()";
+ }
+
+ #create the javascript text
+ $rv .= <<EOT;
+function $func_name() {
+ var args = $func_name.arguments;
+ for( var i=0; i<args[0].length;i++ ) {
+ args[0][i] = fnsplit(args[0][i]);
+ }
+ var l = ajax.length;
+ ajax[l]= new pjx(args,"$func_name",args[2]);
+ ajax[l].url = $url + ajax[l].url;
+ ajax[l].send2perl();
+ $jsdebug;
+}
+EOT
+
+ if ( not $self->JSDEBUG() ) {
+ $rv = $self->compress_js($rv);
+ }
+ return $rv;
+}
+
+=item register()
+
+ Purpose: adds a function name and a code ref to the global coderef
+ hash, after the original object was created
+ Arguments: function name, code reference
+ Returns: none
+ Called By: originating web script
+
+=cut
+
+sub register {
+ my ( $self, $fn, $coderef ) = @_;
+ # coderef_list() is a Class::Accessor function
+ # url_list() is a Class::Accessor function
+ if ( ref( $coderef ) eq "CODE" ) {
+ $self->coderef_list()->{$fn} = $coderef;
+ } elsif ( ref($coderef) ) {
+ die "Unsupported code/url type - error\n";
+ } else {
+ $self->url_list()->{$fn} = $coderef;
+ }
+}
+
+=item JSDEBUG()
+
+ Purpose: Show the AJAX URL that is being generated, and stop
+ compression of the generated javascript, both of which can aid
+ during debugging. If set to 1, then the core js will get
+ compressed, but the user-defined functions will not be
+ compressed. If set to 2 (or anything greater than 1 or 0),
+ then none of the javascript will get compressed.
+
+ Arguments: JSDEBUG(0); # turn javascript debugging off
+ JSDEBUG(1); # turn javascript debugging on, some javascript compression
+ JSDEBUG(2); # turn javascript debugging on, no javascript compresstion
+ Returns: prints a link to the url that is being generated automatically by
+ the Ajax object. this is VERY useful for seeing what
+ CGI::Ajax is doing. Following the link, will show a page
+ with the output that the page is generating.
+
+ Called By: $pjx->JSDEBUG(1) # where $pjx is a CGI::Ajax object;
+
+=item DEBUG()
+
+ Purpose: Show debugging information in web server logs
+ Arguments: DEBUG(0); # turn debugging off (default)
+ DEBUG(1); # turn debugging on
+ Returns: prints debugging information to the web server logs using
+ STDERR
+ Called By: $pjx->DEBUG(1) # where $pjx is a CGI::Ajax object;
+
+=back
+
+=head1 BUGS
+
+Follow any bugs at our homepage....
+
+ http://www.perljax.us
+
+=head1 SUPPORT
+
+Check out the news/discussion/bugs lists at our homepage:
+
+ http://www.perljax.us
+
+=head1 AUTHORS
+
+ Brian C. Thomas Brent Pedersen
+ CPAN ID: BCT
+ bct.x42@gmail.com bpederse@gmail.com
+
+=head1 A NOTE ABOUT THE MODULE NAME
+
+This module was initiated using the name "Perljax", but then
+registered with CPAN under the WWW group "CGI::", and so became
+"CGI::Perljax". Upon further deliberation, we decided to change it's
+name to L<CGI::Ajax>.
+
+=head1 COPYRIGHT
+
+This program is free software; you can redistribute
+it and/or modify it under the same terms as Perl itself.
+
+The full text of the license can be found in the
+LICENSE file included with this module.
+
+=head1 SEE ALSO
+
+L<Data::Javascript>
+L<CGI>
+L<Class::Accessor>
+
+=cut
+
+1;
+__END__
--- /dev/null
+Terms of Perl itself
+
+a) the GNU General Public License as published by the Free
+ Software Foundation; either version 1, or (at your option) any
+ later version, or
+b) the "Artistic License"
+
+---------------------------------------------------------------------------
+
+The General Public License (GPL)
+Version 2, June 1991
+
+Copyright (C) 1989, 1991 Free Software Foundation, Inc. 675 Mass Ave,
+Cambridge, MA 02139, USA. Everyone is permitted to copy and distribute
+verbatim copies of this license document, but changing it is not allowed.
+
+Preamble
+
+The licenses for most software are designed to take away your freedom to share
+and change it. By contrast, the GNU General Public License is intended to
+guarantee your freedom to share and change free software--to make sure the
+software is free for all its users. This General Public License applies to most of
+the Free Software Foundation's software and to any other program whose
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+you receive source code or can get it if you want it, that you can change the
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+To protect your rights, we need to make restrictions that forbid anyone to deny
+you these rights or to ask you to surrender the rights. These restrictions
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+
+For example, if you distribute copies of such a program, whether gratis or for a
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+sure that they, too, receive or can get the source code. And you must show
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+
+We protect your rights with two steps: (1) copyright the software, and (2) offer
+you this license which gives you legal permission to copy, distribute and/or
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+
+Also, for each author's protection and ours, we want to make certain that
+everyone understands that there is no warranty for this free software. If the
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+
projects / kivitendo-erp.git / commitdiff