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I'm writing a simple Sinatra app but having issues having <input type="file" multiple /> not making Rack throw a NoMethodError: undefined method 'bytesize' for (Hash) while reading the files.
The form is written like so:
<form action="/upload" enctype="multipart/form-data" method="post">
<input type="file" name="images[]" multiple />
</form>
But the receiving end throws the mentioned error, before any of my code executes, that is, Rack is not parsing correctly the input[name=images]. Am I sending the form incorrectly? If I drop the brackets [], then only the last file (of many) is sent, but I feel like I might be missing something...
Just to clarify: this is Sinatra v1.4.3 and Rack v1.5.2, the latter being the one throwing the exception. Full backtrace here.
286
The only thing that puts me off here is that you don't use the POST method – maybe your issue has to do with that. Anyway, the following code works perfectly for me. I hope this will give you a hint how to fix your code.
require 'sinatra'
get '/' do
<<-HTML
<html>
<head><title>Multi file upload</title></head>
<body>
<form action="/upload" method="post" enctype="multipart/form-data">
<input type="file" name="images[]" multiple />
<input type="submit" />
</form>
</body>
</html>
HTML
end
post '/upload' do
content_type :text
res = "I received the following files:\n"
res << params['images'].map{|f| f[:filename] }.join("\n")
res
end
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