Does anyone know how to fix "ArgumentError: invalid %-encoding" errors?

[desbest]

I have a simple form POST like this.

def edit_post
    data = request.subset(:content, :post_id)
    shake = Post[data['post_id']]
    data.delete('post_id');
    shake.update(data); shake.save
end

And sometimes when posting the form, the data['content'] fails to work due to a bad encoding.

ArgumentError: invalid %-encoding 

Is there any way to fix this?

[Michael Fellinger]

What version of rack is that?

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Michael Fellinger

[desbest]

Rack 1.4.5

I've got a gif animation here, for anyone who wants to see the web browser display the error, and my code.

[tynamite]

It is the % percent symbol that causes the encoding error. Is there any way this can be properly escaped, as it's already encoded as UTF-8?

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