JavaScript function saveText() needs to Update the Perl array@BO_FO_EMAIL

[William]

My first time posting to clj , I have already read
http://jibbering.com/faq/#FAQ2_3 before posting.

javascript function in question:

saveText() is as follows:

function saveText( scroll_list, t_area, listToBeUpdated ) {
alert( listToBeUpdated .name );
// need to know which list to add the value in textarea back into
for(var i = 0; i < scroll_list.opt ions.length; i++) {
if( scroll_list.opt ions[i].selected == true ) {
scroll_list.opt ions[i].text = t_area.value;
break;
}
}
// push new value to the corresponding scrolling_list
// then use this scrolling_list to update the dummylist
if ( listToBeUpdated .name == "bo_fo_emai ls" ) {
// push ( \@BO_FO_EMAILS, t_area.value );
}
}

The webpage is produced with the following Perl code:


print $query->td(
$query->textarea(-name=>'BOFOEmai ls',
-onChange=>"save Text( this.form.bo_fo _emails,
this.form.BOFOE mails,
this.form.bo_fo _emails )"),
$query->p,
$query->button(-name=>'ADD',
-value=>'Confirm Modifications',
-onClick=>"move( index, this.form.BOFOE mails,
this.form.bo_fo _emails)"),
$query->button(-name=>'REMOVE',
-value=>'Edit Selected Entry',
-onClick=>"edit( this.form.bo_fo _emails,
this.form.BOFOE mails)"));

Basically, I am trying to remove scroll_list.opt ions[i].text from
@BO_FO_EMAILS and replace it with t_area.value.

Order of elements does matter in BO_FO_EMails. ie.
scroll_list.opt ions[i].text must be in the same relative position as
t_area.value in @BO_FO_EMAILS.


Problem:
push ( \@BO_FO_EMAILS, t_area.value );

gives a javascript error "Error on Page". How do I update @BO_FO_EMAILS
within the javascript function saveText()?

[William]

Re: JavaScript function saveText() needs to Update the Perl array

On Fri, 20 Jan 2006, Lee wrote:
[color=blue]
> William said:[color=green]
>>
>> My first time posting to clj , I have already read
>> http://jibbering.com/faq/#FAQ2_3 before posting.
>>
>> javascript function in question:
>>
>> saveText() is as follows:
>>
>> function saveText( scroll_list, t_area, listToBeUpdated ) {
>> alert( listToBeUpdated .name );
>> // need to know which list to add the value in textarea back into
>> for(var i = 0; i < scroll_list.opt ions.length; i++) {
>> if( scroll_list.opt ions[i].selected == true ) {
>> scroll_list.opt ions[i].text = t_area.value;
>> break;
>> }
>> }
>> // push new value to the corresponding scrolling_list
>> // then use this scrolling_list to update the dummylist
>> if ( listToBeUpdated .name == "bo_fo_emai ls" ) {
>> // push ( \@BO_FO_EMAILS, t_area.value );
>> }
>> }
>> Problem:
>> push ( \@BO_FO_EMAILS, t_area.value );
>>
>> gives a javascript error "Error on Page". How do I update @BO_FO_EMAILS
>> within the javascript function saveText()?
>>[/color]
>
> 4. Your Perl code runs on the server, exits (typically), and then
> the page is sent to the client computer where the browser
> displays it and the user makes a selection. @BO_FO_EMAILS
> doesn't exist at the time that they make a selection.[/color]

I hear that by the time I run my javascript, the perl script had already
existed. but the question becomes how do I update a server-side file with
the newest values retrieved by the javascript?

[David Wahler]

Re: JavaScript function saveText() needs to Update the Perl array


William wrote:[color=blue]
> On Fri, 20 Jan 2006, Lee wrote:[color=green]
> > 4. Your Perl code runs on the server, exits (typically), and then
> > the page is sent to the client computer where the browser
> > displays it and the user makes a selection. @BO_FO_EMAILS
> > doesn't exist at the time that they make a selection.[/color]
>
> I hear that by the time I run my javascript, the perl script had already
> existed. but the question becomes how do I update a server-side file with
> the newest values retrieved by the javascript?[/color]

You'll need to generate a new request from the client to the server
carrying your data, and then have the server-side script process it in
whatever way you need. Try researching XMLHttpRequest.

-- David

[William]

Re: JavaScript function saveText() needs to Update the Perl array

On Mon, 23 Jan 2006, William wrote:
[color=blue]
> On Fri, 20 Jan 2006, David Wahler wrote:
>[color=green]
>>
>> William wrote:[color=darkred]
>>> On Fri, 20 Jan 2006, Lee wrote:
>>>> 4. Your Perl code runs on the server, exits (typically), and then
>>>> the page is sent to the client computer where the browser
>>>> displays it and the user makes a selection. @BO_FO_EMAILS
>>>> doesn't exist at the time that they make a selection.
>>>
>>> I hear that by the time I run my javascript, the perl script had already
>>> existed. but the question becomes how do I update a server-side file with
>>> the newest values retrieved by the javascript?[/color]
>>
>> You'll need to generate a new request from the client to the server
>> carrying your data, and then have the server-side script process it in
>> whatever way you need. Try researching XMLHttpRequest.
>>[/color]
>
> I am currently using XMLHttpRequest as follows:
> function saveText( scroll_list, t_area, listToBeUpdated ) {
> var updated = new Option();
> updated.value = t_area.value;
> updated.text = t_area.text;
> for(var i = 0; i < scroll_list.opt ions.length; i++) {
> if( scroll_list.opt ions[i].selected ) {
> scroll_list.opt ions[scroll_list.sel ectedIndex].text =
> updated.value;
> scroll_list.opt ions[scroll_list.sel ectedIndex].value=
> updated.value;
> break;
> }
> }
> var confirmReq;
> var url = "http://mkmxg00/cgi/confirmUpload.p l";
> confirmReq = new ActiveXObject( "Microsoft.XMLH TTP" );
> confirmReq.onre adystatechange = processReqChang e;
> confirmReq.open ( "POST", url, true );
> confirmReq.send ( "" );
>
> alert( url );
> }
>
> function processReqChang e() {
> if ( confirmReq.read yState == 4 ) {
> if ( confirmReq.stat us == 200 ) {
> alert( "passed!" );
> }
> }
> else {
> alert( confirmReq.read yState + ", " + confirmReq.stat us );
> }
> }
>
> Where http://mkmxg00/cgi/confirmUpload.pl is as follows:
> #!/usr/bin/perl -w
>
> #============== =============== =============== =============== =============== =====
> # confirmUpload.p l
> # once the user clicks "Confirm Modifications", this script picks up the
> form's
> # newest data from STDIN (POST method), then saves it to the dummylist
> #============== =============== =============== =============== =============== =====
>
> use CGI;
> use CGI::Carp qw(fatalsToBrow ser);
>
> my $query = new CGI;
>
> # add code that reads in the "Confirm Modifications" request from the CGI
> buffer
> my $buffer;
> read ( STDIN, $buffer, $ENV{'CONTENT_L ENGTH'} );
>
> # buffer now contains data to be written to the dummylist
> open ( OUTFD, "/mkapp/webapps/mxrt/data/extra_desk_tick ers.txt" ) or[/color]

The above line should read:
open ( OUTFD, ">/mkapp/webapps/mxrt/data/extra_desk_tick ers.txt" ) or
error("Couldn't open file: $DATAFILE\n");

But the same problem remained. any help is appreciated.


[color=blue]
> error("Couldn't open file: $DATAFILE\n");
> print ( OUTFD $buffer );
> close ( OUTFD );
>
> exit 0;
>
>
> My problem: nothing is written to
> /mkapp/webapps/mxrt/data/extra_desk_tick ers.txt
>
> I have already invoked confirmUpload.p l with the XMLHttpRequest confirmReq (I
> am using IE 6.0 on Windows XP). Why does the file contains no output from
> the CGI buffer?
>
>[/color]

[William]

Re: JavaScript function saveText() needs to Update the Perl array

On Fri, 20 Jan 2006, David Wahler wrote:
[color=blue]
>
> William wrote:[color=green]
>> On Fri, 20 Jan 2006, Lee wrote:[color=darkred]
>>> 4. Your Perl code runs on the server, exits (typically), and then
>>> the page is sent to the client computer where the browser
>>> displays it and the user makes a selection. @BO_FO_EMAILS
>>> doesn't exist at the time that they make a selection.[/color]
>>
>> I hear that by the time I run my javascript, the perl script had already
>> existed. but the question becomes how do I update a server-side file with
>> the newest values retrieved by the javascript?[/color]
>
> You'll need to generate a new request from the client to the server
> carrying your data, and then have the server-side script process it in
> whatever way you need. Try researching XMLHttpRequest.
>[/color]

I am currently using XMLHttpRequest as follows:
function saveText( scroll_list, t_area, listToBeUpdated ) {
var updated = new Option();
updated.value = t_area.value;
updated.text = t_area.text;
for(var i = 0; i < scroll_list.opt ions.length; i++) {
if( scroll_list.opt ions[i].selected ) {
scroll_list.opt ions[scroll_list.sel ectedIndex].text = updated.value;
scroll_list.opt ions[scroll_list.sel ectedIndex].value= updated.value;
break;
}
}
var confirmReq;
var url = "http://mkmxg00/cgi/confirmUpload.p l";
confirmReq = new ActiveXObject( "Microsoft.XMLH TTP" );
confirmReq.onre adystatechange = processReqChang e;
confirmReq.open ( "POST", url, true );
confirmReq.send ( "" );

alert( url );
}

function processReqChang e() {
if ( confirmReq.read yState == 4 ) {
if ( confirmReq.stat us == 200 ) {
alert( "passed!" );
}
}
else {
alert( confirmReq.read yState + ", " + confirmReq.stat us );
}
}

Where http://mkmxg00/cgi/confirmUpload.pl is as follows:
#!/usr/bin/perl -w

#============== =============== =============== =============== =============== =====
# confirmUpload.p l
# once the user clicks "Confirm Modifications", this script picks up the form's
# newest data from STDIN (POST method), then saves it to the dummylist
#============== =============== =============== =============== =============== =====

use CGI;
use CGI::Carp qw(fatalsToBrow ser);

my $query = new CGI;

# add code that reads in the "Confirm Modifications" request from the CGI
buffer
my $buffer;
read ( STDIN, $buffer, $ENV{'CONTENT_L ENGTH'} );

# buffer now contains data to be written to the dummylist
open ( OUTFD, "/mkapp/webapps/mxrt/data/extra_desk_tick ers.txt" ) or
error("Couldn't open file: $DATAFILE\n");
print ( OUTFD $buffer );
close ( OUTFD );

exit 0;


My problem: nothing is written to
/mkapp/webapps/mxrt/data/extra_desk_tick ers.txt

I have already invoked confirmUpload.p l with the XMLHttpRequest confirmReq
(I am using IE 6.0 on Windows XP). Why does the file contains no output
from the CGI buffer?