What Could Be Causing This Rails Ioerror Closed Stream

what could be causing this rails ioerror closed stream?

I think I've figured it out, at least I think I do ( the client just keeps on uploading now, error-free ) .
After you read data from a file that you upload, you should also CLOSE it. Who would have thought? :P

IOError (closed stream) on ActiveStorage::Attached::One#attach (Rails 6)

Okay, I found the answer. In rails 6 you have to open the tempfile again, when attaching, like this:

io: File.open(tempfile.path),

Hope this helps anyone with the same issue.

Capybara Poltergeist IOError: closed stream

The solution that worked best was to initiate a new Capybara session like this:

session = Capybara::Session.new(:poltergeist, Rails.application)
session.visit(...)
session.driver.quit

For my program I encapsulated it in a WebScraper module like this:

module WebScraper
  attr_accessor :session

  delegate :visit, :save_screenshot, to: :session

  def start_session
    @session ||= Capybara::Session.new(:poltergeist, Rails.application)
  end

  def end_session
    @session.driver.quit
    @session = nil
  end
end

Uploading files to S3 using paperclip, IOError (closed stream) error

It looks like this is caused by a race condition between the ruby garbage collector and Tempfile.

Someone developed a patch for rails projects here: https://github.com/jwinky/ruby_tempfile_ioerror

Ruby gets stream closed stream IO error

I am on a different system so I cannot check your code. Anyway I suggest using File.foreach:

File.foreach("packages_list.txt") do |line|
  package_id = line.split[0].to_i
  package = line.split[1]
  dependencies = ""
  url = BASE_URL + package
  if package_id >= last_package
    doc = Nokogiri::HTML(open(url))
    doc.css(".uldep a").each do |dependency|
      dependencies << dependency.text + ","
    end
    dependencies = dependencies.split(',').uniq.join(',')
    description = doc.css('#pdesc').text.strip
    if doc.css('#content h1').text 
       version = doc.css('#content h1').text.strip.scan( /\(([^>]*)\)/).last.first
    end

    File.open("packages/#{package}","w") do |wfptr|
      wfptr.puts "PackageId:#{package_id}"
      wfptr.puts "Name:#{package}"
      wfptr.puts "Deps:#{dependencies}"
    end
    File.open("packages/#{package}.description",'w') {|wf| wf.write(description.capitalize)}

    package_id += 1
    puts "Now Processing #{package_id}"
    File.open('lastbreak','w') { |fptr| fptr.puts "#{package_id}" }
  end
end

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