473,847 Members | 1,714 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

check clientside file size

hi,

i have an upload mechanism on my website and want to check the filesize
on the client size. is this possible?

thanks
yavuz bogazci

Jun 23 '06 #1
2 2293
Rik
yo*********@goo glemail.com wrote:
hi,

i have an upload mechanism on my website and want to check the
filesize on the client size. is this possible?

Not with PHP, which doesn't work client sided.
What is possible:
http://nl3.php.net/manual/en/features.file-upload.php
"Example 38-1. File Upload Form

A file upload screen can be built by creating a special form which looks
something like this:

<!-- The data encoding type, enctype, MUST be specified as below -->
<form enctype="multip art/form-data" action="__URL__ " method="POST">
<!-- MAX_FILE_SIZE must precede the file input field -->
<input type="hidden" name="MAX_FILE_ SIZE" value="30000" />
<!-- Name of input element determines name in $_FILES array -->
Send this file: <input name="userfile" type="file" />
<input type="submit" value="Send File" />
</form>

The __URL__ in the above example should be replaced, and point to a PHP
file.

The MAX_FILE_SIZE hidden field (measured in bytes) must precede the file
input field, and its value is the maximum filesize accepted. This is an
advisory to the browser, PHP also checks it. Fooling this setting on the
browser side is quite easy, so never rely on files with a greater size being
blocked by this feature. The PHP settings for maximum-size, however, cannot
be fooled. This form element should always be used as it saves users the
trouble of waiting for a big file being transferred only to find that it was
too big and the transfer failed."

So, always check is server-sided. You can hint to the user what the maximum
allowed size is, they can choose to ignore it.

Grtz,
--
Rik Wasmus
Jun 23 '06 #2
*** yo*********@goo glemail.com escribió/wrote (23 Jun 2006 04:51:41 -0700):
i have an upload mechanism on my website and want to check the filesize
on the client size. is this possible?


In general, it's impossible to do so with pure HTML. You'd need a signed
Java applet or similar complicate solutions. Also, I believe you can also
do it with JavaScript, but never tested it myself.

--
-+ Álvaro G. Vicario - Burgos, Spain
++ http://bits.demogracia.com es mi sitio para programadores web
+- http://www.demogracia.com es mi web de humor libre de cloro
--
Jun 27 '06 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

2
3869
by: vishal | last post by:
hi is there anyway that i can check the size of file on client side before uploading file to server???? suppose the user uploads file of 10 mb then the server will know the size is 10 mb after the file is uploaded to server which wastes the bandwidth so what i want to check is that the server first checks the size of file to upload and if it is o.k. then and then only the file will be uploaded..
3
1749
by: Matt | last post by:
Is there a way to use JavaScript to check if a file path exists? For example, user enter C:\eklrjlejr in a text box, and I want to check if the file really exists. Is there a way to use JavaScript to do that? please advise. thanks!!
2
5484
by: tgundeck | last post by:
Does anyone know how I can check the file size of photos or any file type in JavaScript? I'm allowing users to store photos in my web page using the input type = file tag, but need to limit the photo size to 1 meg. I would like to check the file size in JavaScript on the page, instead of on the server. Anyone know how I can check the file size in JavaScript?
4
2607
by: lawrence | last post by:
Using <INPUT type"file" runat="server"> to upload a file. When the file size is too large I get a "page cannot be display" error. Thats cool I'm down with that. But is there a way to check for file size (client or server side), so that error doesn't occur? Thanks --Dietrich
3
1634
by: walterbyrd | last post by:
I am working on a timecard app. When somebody logs in, it stamps his/her time. Problem is, I have to make sure that somebody is not logging in from a remote site. I want all the logins from one particular, on site, system. The app is part of another system, which is ran online. It's not a local intranet, or anything.
3
30210
by: puja | last post by:
hi all, In asp.net 2.0 there is a limit on file size upload of 4MB. I know this limit can be increased in web.config file. Is there any way to check the file size before upload ? if user is trying to upload file size more than 4MB then just display a message that file size is too big and can't be uploaded. thanks
5
3308
by: lovecreatesbea... | last post by:
The condition at line 31 is added to check if the program finished to read the whole file. Is it needed and correct? Thank you. #include <fstream> #include <iostream> #include <string> using namespace std; int read(string filename, int last_pos) {
2
8641
butro
by: butro | last post by:
I have a form which can check whether is an image or not. But when i try to choose a real image whose name include more than one "." character, the script fails. The split function can not be detect the file extensions when the string has "." more than one. Here is my codes. This script allows only image (i mean, .jpg, .gif, etc. file extensions). <HTML> <Head> <Script Language=JavaScript> function getStats(fName){ nullIMG.src =...
3
8281
Frinavale
by: Frinavale | last post by:
Hi there! I'm hoping that someone knows how to check the size of a file before it is uploaded to the server using JavaScript. I have seen suggested solutions using an ActiveX control to check the file size; however, I'm not happy with this solution because my application is designed to work in multiple browsers and ActiveX is limited to Internet Explorer. I cannot check the file size on the web server because IIS throws the following...
0
9730
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10983
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10648
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10707
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10341
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
1
7883
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
7056
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
1
4529
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
3164
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.