Interesting project, but I'm curious about the license on it.

One of my IOWA apps has been running for over 12 years now, with only minor hiccups during the upgrade from ruby 1.8 to 2.6.

A recent feature request includes the capability to upload images, which I tried to implement via a <input type="file" name="upload" multiple ...> form field. However, the WEBrick request handler explicitly joins multiple form values for the same form field into a single string (src/iowa/request/WEBrick.rb, around line 25) using \0 as separator.

Not good for binary content.

I've managed to find an extremely ugly way around this, but I wonder if there is a smart way to get multiple files uploaded via a single input field.

Had to change ruby versions from 3.0 to 3.1 due to upcoming openssl-1.1.1 EOL.
IOWA still performs admirably, after all these years.

Minor hiccup: After upgrading ruby and with a "fresh" IOWA gem, my app failed to launch:

 $ ruby isys.rb
/home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Util.rb:284:in `block in find_class': undefined method `snake_case' for "RubyLogger"
:String (NoMethodError)

        x.push piece.snake_case if piece != piece.snake_case
                                                 ^^^^^^^^^^^
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Util.rb:282:in `each'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Util.rb:282:in `find_class'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Util.rb:233:in `get_logger'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Application.rb:309:in `Logger='
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Application.rb:334:in `initialize'
        from isys.rb:88:in `initialize'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Application.rb:61:in `new'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa/Application.rb:61:in `newApplication'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa.rb:532:in `app'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa.rb:62:in `startDaemon'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa.rb:470:in `run_check_started'
        from /home/isys/.gem/ruby/3.1.0/gems/IOWA-1.0.3/src/iowa_webrick.rb:139:in `run'
        from isys.rb:147:in `<main>'                                          

I inserted a require 'iowa/Extensions/String' before the require 'iowa' and the app started again. Not the correct place, but it works. I'm not sure if it has something to with ruby 3.1 or if I somehow tweaked it for ruby 3.0, too.

I've been staring at that HTML source for a while until I noticed that there were exactly as many bytes missing at the end as there were umlauts (2 bytes in UTF-8) encoding on that page. Tracked it down to the webrick handler setting the Content-Length response based on response.body.length instead of response.body.bytesize.