# Multipart form posted failed in IIS 7

**URL:** <https://www.ruby-forum.com/t/multipart-form-posted-failed-in-iis-7/194220>\
**Category:** IronRuby\
**Created:** [September 1, 2010, 10:08am UTC](https://www.ruby-forum.com/t/multipart-form-posted-failed-in-iis-7/194220 "2010-09-01T10:08:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![jwhardcastle](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/91b2a8/32.png) [@jwhardcastle](https://www.ruby-forum.com/u/jwhardcastle)\
**Post date:** [September 1, 2010, 10:08am UTC](https://www.ruby-forum.com/t/multipart-form-posted-failed-in-iis-7/194220/1 "2010-09-01T10:08:55Z")

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Hopefully I can explain it well:

I am testing a rails app in IIS 7.  
(Windows 7, IIS 7, .NET 3.5, Rails 2.3.5, Rack 1.0, IronRuby 1.0,  
IronRack compiled from IronRuby 1.0 source from github)

Now If I add enctype=“multipart/form-data” to my rails form, and then  
post this form to a controller, all I got is a 500 error page, no error  
messages written to Rack or Rails logs. It works fine if I remove  
multipart option.

Anyone got similar problems?

Thanks.

Jack

---

<div class="post-metadata">

**Author:** ![jwhardcastle](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/91b2a8/32.png) [@jwhardcastle](https://www.ruby-forum.com/u/jwhardcastle)\
**Post date:** [September 2, 2010, 3:58am UTC](https://www.ruby-forum.com/t/multipart-form-posted-failed-in-iis-7/194220/2 "2010-09-02T03:58:40Z")

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Finally the error was written into the rails log:

Status: 500 Internal Server Error  
bad content body  
C:/ironruby/lib/ironruby/gems/1.8/gems/rack-1.0.1/lib/rack/utils.rb:319:in  
`parse_multipart' C:/ironruby/lib/ironruby/gems/1.8/gems/rack-1.0.1/lib/rack/request.rb:132:in `POST’  
C:/ironruby/lib/ironruby/gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:15:in  
`call' C:/ironruby/lib/ironruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call’  
C:/ironruby/lib/ironruby/gems/1.8/gems/actionpack-2.3.5/lib/action\_controller/session/cookie\_store.rb:93:in  
`call' C:/ironruby/lib/ironruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call’  
C:/ironruby/lib/ironruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in  
`call' C:/ironruby/lib/ironruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `synchronize’  
C:/ironruby/lib/ironruby/gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in  
`call’  
…

What puzzled me is why it is working when just use rackup, but not in  
IIS.

Jack Hong wrote:

> Hopefully I can explain it well:
> 
> I am testing a rails app in IIS 7.  
> (Windows 7, IIS 7, .NET 3.5, Rails 2.3.5, Rack 1.0, IronRuby 1.0,  
> IronRack compiled from IronRuby 1.0 source from github)
> 
> Now If I add enctype=“multipart/form-data” to my rails form, and then  
> post this form to a controller, all I got is a 500 error page, no error  
> messages written to Rack or Rails logs. It works fine if I remove  
> multipart option.
> 
> Anyone got similar problems?
> 
> Thanks.
> 
> Jack