Server (IO) Error Upon Clicking Upload

There must something wrong with your servers configuration, at least, it answers some data which can't be interpreted by flash. Does it work with Flash 10?

Please inform me if it works. Perhaps you could describe it a bit for other people to fix it, thank you.

I have the same problem with Image Fupload 2.2 and Drupal 6.9.

It seems that using SSL (https) and Firefox for this aren't currently compatible. I too am not using mod_security. The specific Adobe reference is http://bugs.adobe.com/jira/browse/FP-201. Is there any way to put this hack into this module?

Image FUpload is based on the Flashmovie swfupload (http://swfupload.org/). The problem is already known by the developer but Adobe didn't fix it.
But it also seems that this problem only appears with self-signed certs, have a look at this discussion.
http://swfupload.org/forum/generaldiscussion/347

If you import these certs into IE as root, it should also work in FF3. Have a look at the discussion mentioned above.

Thanks, that worked! Yes, I am running an internal site with self-signed certificates. So I imported my own signature authority as a trusted root authority, and it works. You probably need a FAQ on that in the module to save you some headaches list this.

Very happy, that it works for you.
You're right, a good documentation is missing at the moment. But this will come surely.

I'll add another solution to this. I was having a problem on the Mac with both Firefox and Safari. The problem was proxy settings. I had the overall system proxy settings set to use a proxy, and Firefox configured to NOT use a proxy. Generally Firefox uses its own proxy settings and ignores the system proxy settings. In this case, it was ignoring them in all cases except when using SWFupload.

I had the system proxy set to a proxy server that was inoperable. Safari understood this enough to ignore the dead proxy, but SWFupload did not cleanly degrade to a direct connection and instead popped up with the dreaded IO error.

Bottom line - if you are having this problem, look at your proxy settings BOTH for the system/OS level, and within the browser. You may see some interactions that you did not otherwise expect.

Thank you for your comment, this will surely help other people fixing some problems using fupload/swfUpload.

Read all posts and still can't determine what the cause or solution is. Can someone clarify what I should be looking for?

Still having this problem. Both on FF mac and IE 8 win. Mac says "server (io) error. IEwin says "unspecified error"

EDIT: FIXED. I had incorrect directory specified. Was not relative to root. DOH!

hi there,

new drupal user here, but felt the need to register and confirm this solution and thank rjbrown99! i've searched like crazy for solutions for about 3 days..

this is what i have experienced:
operating on windows xp sp3, installed apache 2.2, php 5.2, mysql 5.1 on local machine; installed drupal 6.17 and a couple of modules: cck, views, image_fupload; created the appropriate content type to use image_fupload for uploading multiple images per node.
after setup, i've tried to create content; selected images for upload with swfupload button, bun when i've tried to hit save, uploading hang at first image at 100%.. waited for minutes, nothing.. fired up task manager, firefox (well, firefox's 3.6.6 plugin-container.exe to be more precise) was eating my CPU. tried IE8, the same; chrome the same, but without extensive testing because ie8's (and implicitly chrome's) proxy settings were affecting the whole system. at this point i should mention that the whole story happens at work, on a machine on a corporate network with in-network http proxies for internet access. installed also sea-monkey, because i found over the internet posts saying that there may be problems with firefox's plugin-container, the same. tried switching flash versions, installed flash 10.0, then went back to 9; tried swfupload 2.50 beta, etc.. tried the image plugin, to approach this differently.. enabled debug in swfupload, the reports were stopping after last bytes sent.. i went like crazy searching and searching and reading posts over drupal image_fupload's related pages and the internet.. nothing, until i got in great luck because in flash 9 something was different, and at least i got an upload error message after some time and nothing relevant in swfdebug.
redefining my search, i've came across this thread and after reading rjbrown99's post, i was like 'aaaargghhh, it can't be!'. went to stupid IE's system proxy settings, disabled proxy and.. upload successful!

frankly i'm quite astonished, my question now is.. why, but WHY do flash takes under consideration system's proxy settings when it runs inside a browser with his owns?

so, if you have the "uploading..." problem with image_fupload / swfupload, watch out for system proxy settings (if they are different than your browser ones)! flash needs access to your site, and your system's settings may interfere.

sorry for the long post, had to write this, maybe it helps someone like me someday, or project developers to help users having similar issues.

Thank you for your experience.

In my case, Skype caused the Server (IO) Error. When I turned off Skype, FUpload worked good.