Category Archives: Uncategorized

How to make download a file in perl?

Perl Scripts, Uncategorized

It can be done as :

my $file_size=-s "folder/Excel_12345.xls" ;
	print $q->header(
		-type=>"application/vnd.ms-excel",     #MIME type
		-attachment=> "folder/Excel_12345.xls",
		-Content_Length=>"$file_size"          #File size
		);
		open (INFILE,"folder/Excel_12345.xls" ) or die("FAILED TO OPEN Excel FILE"); 
		binmode(INFILE);
		while (<INFILE>){
			print $_;
		}
		close(INFILE);          
		unlink ("folder/Excel_12345.xls" ); #delete file from server
		exit;

It’s important that it should be written before printing the header. ie., print $q->header();

Javascript to check the maxlength.

HTML & CSS, Java Scripts, Uncategorized,

Since IE 8 doesn’t support the attribute maxlength, we need to use java script to workout this functionality. We can write the script as follows.

<textarea id="clm_add_lin_dta" maxlength="80" name="clm_add_lin_dta" style="resize:none;" onchange="testLength(this,80)" onkeyup="testLength(this,80)" onpaste="testLength(this,80)"></textarea>

<script>
   function testLength(ta,maxLength ) {
        if (ta.value.length > maxLength) {
            ta.value = ta.value.substring(0, maxLength);
        }
    }
</script>

How to get values from the URL using javascript?

Java Scripts, Uncategorized

When we are in need to get values from the URL using java script as we get them using $_REQUEST[‘name’]; in PHP, $q->param(‘name’); in Perl etc. we can use the following function to get the values in java script :

function getUrlVars() {
    var vars = {};
    var parts = window.location.href.replace(/[?&]+([^=&]+)=([^&]*)/gi, function(m,key,value) {
         vars[key] = value;
    });
    return vars;
}

To get the values we should call the above function as follows :

var val1=getUrlVars()["name1"];
alert(val1);

If the URL is http://ww.example.com/page.php?name1=value1&name2=value2&name3=value3, then the

var val1=getUrlVars()["name1"]; //value1
var val2=getUrlVars()["name2"]; //value2
var val2=getUrlVars()["name2"]; //value3

How to get the current URL using javascript?

Java Scripts, Uncategorized

The way to get the current URL using java script is as follows:

var thisUrl = window.location.href;
alert( thisUrl );

The output will be :

 http://www.example.com/page.php?name=value

How can we break out from a loop in perl?

Perl Scripts, Uncategorized

It’s can be done as :-

my @a=(1,2,3,4,5,6,7,8,9,12);
my $b=3;
#print "ttt:-".$a[$b-2];
foreach my $c (@a)
{
    print $c."\n";
    if($c==$b)
    {
        last;
    }
}

The output will be as :

  1
 2
 3