JavaPowUpload 1.0 control documentation

Troubleshooting

Here you can find most ofter errors and problems can occure while upload via JavaPowUpload. Some articles join in groups relayted to technology of file processing code at server side.

Any HTTP error:

JavaPowUpload can display HTTP response returned by web server. However, use HTTP Sniffers to get full server response with error description. Like HTTP Analyzer (15 days trial)
HTTP Sniffer also can be helpfull to see how JavaPowUpload sends files (Request).

You can find most HTTP errors short descriptions at w3.org website.

ASP (ASP.OLD) file processing script

Error 403
See solution here http://support.microsoft.com/kb/327659

Write Permissions to UploadedFiles\ folder
Error like "Access to the path "C:\Inetpub\wwwroot\Upload\UploadedFiles\myfile.jpg" is denied"

The directory where uploaded files will be saved on the web server must have Read, Write, and Delete NTFS permissions for the Anonymous or authenticated user (If Windows authentication used):
Right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the needed account, and check the boxes for the desired access.

ASP.NET file processing script

Create web application in folder with script
Parser Error Message: It is an error to use a section registered as allowDefinition='MachineToApplication' beyond application level. This error can be caused by a virtual directory not being configured as an application in IIS

ASP.NET code works only in folders at server with created "web application". To create: Open Control panel->Administrative tools-> Internet Information Services->Expand "Default web site", right mouse click at the needed folder and select "Properties" in context menu. In the folder properties dialog box open "Directory" tab and click "Create" button (create Application), click "ok" .

Write Permissions to UploadedFiles\ folder
Error like "Access to the path "C:\Inetpub\wwwroot\Upload\UploadedFiles\myfile.jpg" is denied"

You should grant NETWORK_SERVICES (for IIS 6) or ASPNET (IIS6) or other needed account write access to a folder where uploaded files will be saved, right-click the file in Explorer, choose "Properties" and select the Security tab. Click "Add" to add the appropriate user or group. Highlight the needed account, and check the boxes for the desired access.

Error "System.Web.HttpException: Maximum request length exceeded"
Upload large files

See solution here

Error "System.Web.HttpException: Request timed out"
See solution here

Error "OutOfMemoryException: Exception of type System.OutOfMemoryException was thrown"
See solution here

IIS7 (Windows Vista) ASP.NET file processing script

HTTP Error 404.13 - Not Found
Description: The request filtering module is configured to deny a request that exceeds the request content length.

Upload files greater than 30 MB

By default in IIS 7 enabled requestFiltering that have MaxAllowedContentLength property. It specifies, in bytes, the maximum length of content in a request. The default is 30000000 (approximately 30 megabytes.) To change this value you must include following code in your Web.config file if you want to apply this setting only to you application. If you want to change this setting for all of the computer and not just this ASP.NET application, you must modify the Machine.config file. By default, the element is set to the following parameters in the Machine.config file: The Machine.config file is located in the \System Root\Microsoft.NET\Framework\Version Number\CONFIG directory.

If you have error that requestFiltering cannot be overriden you must edit mashine.config file and change string
<section name="requestFiltering" overrideModeDefault="Deny" />
to <section name="requestFiltering" overrideModeDefault="Allow" />

PHP

Information relayted to files upload in PHP
You can find a lot of information relayted to file upload in PHP code at this website http://de3.php.net/manual/en/features.file-upload.php
By default uploadfiles.php script shows error constant. See description of all constants relayted to upload at http://php.net/manual/en/features.file-upload.errors.php

php.ini settings relayted to upload

The most common cause of problems related to file uploads is PHP itself. The following php.ini settings effect file uploads:

file_uploads boolean

Name

Default

Changeable

Changelog

file_uploads

"1"

PHP_INI_SYSTEM

PHP_INI_ALL in PHP <= 4.2.3. Available since PHP 4.0.3


This parameter has to be set to 1 to accept file uploads, value 0 is to not accept file uploads. Defaults to 1

post_max_size integer

Name

Default

Changeable

Changelog

post_max_size

"8M"

PHP_INI_PERDIR

PHP_INI_SYSTEM in PHP <= 4.2.3. Available since PHP 4.0.3



This is the maximum size of a POST request that PHP will accept. The default for PHP 4.3.x is 8M. If the file(s) you are trying to upload have a single or combined size over this value, PHP will exit. This affects the total post data. For example, if this were set to 8M and you are uploading four 3M files, PHP would not accept the files. You could, however, upload the four 3M files individually without a problem from this setting.
To upload large files, this value must be larger than upload_max_filesize.
If memory limit is enabled by your configure script, memory_limit also affects file uploading. Generally speaking, memory_limit should be larger than post_max_size.
If the size of post data is greater than post_max_size, the $_POST and $_FILES superglobals are empty. This can be tracked in various ways, e.g. by passing the $_GET variable to the script processing the data, i.e. <form action="edit.php?processed=1">, and then checking if $_GET['processed'] is set.
memory_limit integer

Name

Default

Changeable

Changelog

memory_limit

"128M"

PHP_INI_ALL

"8M" before PHP 5.2.0, "16M" in PHP 5.2.0

This sets the maximum amount of memory in bytes that a script is allowed to allocate. This helps prevent poorly written scripts for eating up all available memory on a server. Note that to have no memory limit, set this directive to -1.

upload_max_filesize integer

Name

Default

Changeable

Changelog

upload_max_filesize

"2M"

PHP_INI_PERDIR

PHP_INI_ALL in PHP <= 4.2.3.



This is the maximum size of an individual uploaded file. The default for PHP 4.3.x is 2M.

max_input_time ineger


Name

Default

Changeable

Changelog

max_input_time

"-1"

PHP_INI_PERDIR

Available since PHP 4.3.0.


This is the maximum time PHP will accept input in seconds.

upload_tmp_dir string

Name

Default

Changeable

Changelog

upload_tmp_dir

NULL

PHP_INI_SYSTEM

 

The temporary directory used for storing files when doing file upload. Must be writable by whatever user PHP is running as. If not specified PHP will use the system's default.


Definition of PHP_INI_* constants


Constant

Value

Meaning

PHP_INI_USER

1

Entry can be set in user scripts or in Windows registry

PHP_INI_PERDIR

2

Entry can be set in php.ini, .htaccess or httpd.conf

PHP_INI_SYSTEM

4

Entry can be set in php.ini or httpd.conf

PHP_INI_ALL

7

Entry can be set anywhere


Change Apache settings

If you do not have access to change php.ini and your website is running on apache, you may be able to include these settings in an .htaccess file. This is only possible if "AllowOverride Options" or "AllowOverride All" privileges have been set (by you, by your ISP, or by a system administrator) in httpd.conf.

If this is feasible, or if you want to try the solution on your own, create or edit a file named .htaccess (assuming you want a 6Mb max attachment size):
php_value post_max_size "7M"
php_value upload_max_filesize "6M"
php_value max_input_time "120"

Permissions

If it is a Window server nothing is required and by default window gives all permissions.

For Linux and Uinx you have to give write (Chmod) permission to both temp and destination directories to allow uploaded files to store.