Download Header Error Trapping

[ak1dnar]

Hi,
I am creating script to download some files using download dialog box.First time i tried to use ajax for this, but i failed.
So i went through this way,

By Using this function i am going to submit the Data to process to PHP.
JS Function:

function file_down(fid)
{
window.location = "download.php?fid="+fid;
}

Calling Function
[PHP]<a href="javascript:file_down('.$row['p_id'].')" ><img src="images/down.jpg" /></a>[/PHP]
download.php
[PHP] <?php
$fid = $_REQUEST['fid'];
require 'dbcon.php';
$sql="SELECT p_man FROM products where p_id = '$fid'";
$result=mysql_query($sql) or die("File Not Found : " . mysql_error());
$row = mysql_fetch_assoc($result);
$file = $row['p_man'];
$FILE_ROOT = "user_manuals/";
$path = $FILE_ROOT.$file;
if($file)
{
header("Content-Type: application/octet-stream");
header("Content-Length: " . filesize($path));
header('Content-Disposition: attachment; filename="'.$file.'"');
readfile($path);
}
else
{
/*If the file Name is Not Available in the Table,
I need to OPen another POP UP window to display the File Not Found Message.
Or Any Other way to Display the Eror.
*/
}
?>[/PHP]
When I am sending ID from JS function to PHP side it will OPEN the save as Dialog box. But if the File Name is Missing in the table ERRORS will Display under download.php. What i need actually prevent this probleme. That means i want to I am not going to redirect th user back to the Download.php page if errors found.

In that case from the first page itself i want to display a ERROR window.
JS or HTMP Pop up.

[vssp]

Can you send me the error so we can easily identify your problem

[ak1dnar]

Errors will Get Based on two things here.
One is in the Table Name of the File is Missing.
second In the FILE_ROOT the file is Unavailable.

I want trap those two errors. Again As i said earlier I need to display this Error Messages in this Manner.

From the First Page ID will Pass to Dpwnload.php, from there if the is No Error Save as DIalog Box will display.
If Not I need to Display the Error Like File Not Found. But User Should be there at the First page Not in the download.php page.
Or elese first page is Still in the focus and File Not Found Pop up shoul Display. Any Idea.
This Error is Getting if there is No File in The File Root DIR.

Warning: filesize() [function.filesize]: stat failed for user_manuals/1.pdf in D:\AppServ\www\WEB_SITE\download.php on line 13
 
Warning: Cannot modify header information - headers already sent by (output started at D:\AppServ\www\WEB_SITE\download.php:13) in D:\AppServ\www\Akita\akita_store\download.php on line 13
 
Warning: Cannot modify header information - headers already sent by (output started at D:\AppServ\www\WEB_SITE\download.php:13) in D:\AppServ\www\Akita\akita_store\download.php on line 14
 
Warning: readfile(user_manuals/1.pdf) [function.readfile]: failed to open stream: No such file or directory in D:\AppServ\www\WEB_SITE\download.php on line 15
 

[merseyside]

Try using the file_exists() function in the conditional of your if statement rather than the string. I think an empty or non empty string is always evaluated to true.

http://uk2.php.net/manual/en/function.file-exists.php

[ak1dnar]

Try using the file_exists() function in the conditional of your if statement rather than the string. I think an empty or non empty string is always evaluated to true.

http://uk2.php.net/manual/en/function.file-exists.php

[PHP]$file = $row['p_man'];// File_name.pdf as the value to $file
$FILE_ROOT = "user_manuals/";
$path = $FILE_ROOT.$file;

if(file_exists($path))
{
//headers goes here
}[/PHP]

Because of this $FILE_ROOT this will always evaluated to true. so my Php File will download.that means when there is no value in the table also this condition will set to true.

[devsusen]

Hi,

I think its better to use is_file() instead of file_exists() as the 2nd function can evaluate true if the path for the file exists. But is_file() will evaluate only true if the file really exists in the specified path.

susen

[ak1dnar]

Hi,

I think its better to use is_file() instead of file_exists() as the 2nd function can evaluate true if the path for the file exists. But is_file() will evaluate only true if the file really exists in the specified path.

susen

Thank you very much susen its a new function for me. thanks again. :)