- Input Type File Javascript
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- Input Type File Upload
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Is there any way to find out the file size before uploading the file using AJAX / PHP in change event of input file?
13 Answers
For the HTML bellow
try the following:
See following thread:
Here's a simple example of getting the size of a file before uploading. It's using jQuery to detect whenever the contents are added or changed, but you can still get files[0].size without using jQuery.
Input Type File Javascript
Here's a more complete example, some proof of concept code to Drag and Drop files into FormData and upload via POST to a server. It includes a simple check for file size.
Gleb KemarskyBest solution working on all browsers ;)
from http://www.dotnet-tricks.com/Tutorial/jquery/HHLN180712-Get-file-size-before-upload-using-jquery.html
UPDATE : We'll use this function to check if it's IE browser or not
Warren SergentI had the same problem and seems like we haven't had an accurate solution. Hope this can help other people.
After take time exploring around, I finally found the answer. This is my code to get file attach with jQuery:
This is just the example code for getting the file size. If you want do other stuffs, feel free to change the code to satisfy your needs.
Browsers with HTML5 support has files property for input type. This will of course not work in older IE versions.
ucefkh's solution worked best, but because $.browser was deprecated in jQuery 1.91, had to change to use navigator.userAgent:
Warren Sergentyou need to do an ajax HEAD request to get the filesize. with jquery it's something like this
kasper Taeymanskasper TaeymansPlease do not use ActiveX as chances are that it will display a scary warning message in Internet Explorer and scare your users away.
If anyone wants to implement this check, they should only rely on the FileList object available in modern browsers and rely on server side checks only for older browsers (progressive enhancement).
Nicolas BouvretteInput Type File Filter
Nicolas BouvretteYou can use PHP filesize function. During upload using ajax, please check the filesize first by making a request an ajax request to php script that checks the filesize and return the value.
rechieHow To Use Input Type File In Jsfirmwater
rechieYou can by using HTML5 File API: http://www.html5rocks.com/en/tutorials/file/dndfiles/
Input Type File Upload
However you should always have a fallback for PHP (or any other backend language you use) for older browsers.
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Personally, I would say Web World's answer is the best today, given HTML standards. If you need to support IE < 10, you will need to use some form of ActiveX. I would avoid the recommendations that involve coding against Scripting.FileSystemObject, or instantiating ActiveX directly.
In this case, I have had success using 3rd party JS libraries such as plupload which can be configured to use HTML5 apis or Flash/Silverlight controls to backfill browsers that don't support those. Plupload has a client side API for checking file size that works in IE < 10.