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Rails Multiple File Upload
Posted by Matt Kull Sun, 18 Mar 2007 20:02:00 GMT
For the photos feature on YourBarGuide I needed a way for users to easily upload multiple files at once.
Read on about the different options I looked at, and how I finally settled on a Flash upload widget
Plain HTML
The simplest method is to use a HTML form with multiple file upload boxes. This is simple, yet crude and cumbersome to use for the user.
Java Applet
Another option is to use an embedded Java Applet. This is a nice solution which sites like Facebook use. This option provides clean, cross-browser file selection dialogue which lets the user upload files as a batch, and displays the a status monitor of the upload progress. There are several prepackaged libraries providing this functionality such as JUpload.
While providing some very slick functionality, all of the Java-based solutions would have required a bit Java programming in order to to get them doing what I needed them to do, and everything I found was a bit pricey (JUpload is ~$800 for a developer license)
Flash Upload
I decided to go with a Flash based solution. There is an excellent tutorial, with source code posted on Vixiom Axioms
I did add some extra features to the code to meet my requirements:
- The ability to cancel a file upload while it is in progress
- File size check / warning
- Javascript callback so that an “uploadComplete()” function is called when all file uploads are completed. (This lets you update the page display with the uploaded files without a full page reload)
- Security check: I require users to be logged in when they upload a file so I can map uploaded files to the account which uploaded them. I pass a token with each uploaded file which includes account credentials so I can validate them on each file upload. (this is necessary since the Flash upload request exists in a different session then the current user’s session)
- The ability to work with the file_column plugin
You can find my updated .as and .fla files here I also included a README with some instructions on how to work with file_column and provide user validation as well as a paste from my view file so you can see an example of refreshing the page via AJAX once the uploads are complete.
Hi, i try to use the flash multi uploader very simply i.e. allow all users to upload pics but i can’t find a php file to make it works and i don’t understand hiw did you modify the fla because i would like to delete update function… hope im clear ^^ thx alex
Man you don’t even know how long I’ve waited for this since disabling my own Movable Type widget (that doesn’t work since Haloscan bypasses that code).
THANK YOU!
Man,
Samples not in there anymore. Please take them out from under the lake and put a safe place to grab. http://www.yourbarguide.com/flashupload.zip broken.
Really waiting only for this. Take care
I would like to look at your sample code. But the zip is no longer to be found. :(
Thanks for all these links! Guys you save my life!
Sorry about that guys I recently moved the bar guide to a new VPS and those files got lost. I have since re-added them so the old links should be working again.
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Unfortunately flash upload doesn’t work in firefox on linux :(
That sux for any serious web developer.
And this is not specific to Vixiom Axiom’s solution, it’s about flash uploading. It just doesn’t work on linux-firefox.
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Hi, Need your help. Thanks very much if you can reply me. I met a very strange problem when I try to use this flash(both yours and the one in vixiom website). I did the rails application following by the step and visit the web page succesfully. But it’s very stange that I can only use the ‘Browse’ button and the ‘Upload’ button never worked for me. Then I save the page, and ran from local. The ‘Upload’ button worked for me! I don’t know why this happened. I tried to debug the flash code and I cannot find out the reason. Could you please help me? Thanks very much.