Ruby on Rails Upload File Problem Odd Utf8 Conversion Error

Ruby on Rails upload file problem odd utf8 conversion error

I believe this is a change in how rails 3 works with ruby 1.9, since 1.9 supports encodings it will attempt to convert all strings to whatever encoding you have set in your app configuration (application.rb), typically this is 'utf-8'.

To avoid the encoding issue open the file in binary mode, so your mode would be 'wb' for binary writeable:

File.open(Rails.root.join('public', 'images', file.original_filename), 'wb') do |f|
  f.write(file.read)
end

getting encoding error cannot convert ascii-8bit to utf-8bit

changed 'w' to 'wb'

if params[:user][:image].present?
  uploaded_io = params[:user][:image]
  name = "image_" << @user.username << uploaded_io.original_filename
  File.open(Rails.root.join('public', 'images','profile',name ), 'wb') do |file|
    file.write(uploaded_io.read)
  end
end  

Encoding error while writing data from excelfile to database (mysql)

You should add this line to the top of your .rb file

# encoding: utf-8

Or you can use this gem

magic_encoding

Related topic:

Add "# coding: utf-8" to all files

Ruby: File.read Error encoding:UTF-8

It seems you are using older Ruby version. Try this instead:

File.read(inputfile, :encoding => "UTF-8").gsub(/<group.*?type=\"public\".*?\/>/, "")

when we import csv data, how eliminate invalid byte sequence in UTF-8

Ruby 1.9 CSV has new parser that works with m17n. The parser works with Encoding of IO object in the string. Following methods: ::foreach, ::open, ::read, and ::readlines could take in optional options :encoding which you could specify the the Encoding.

For example:

CSV.read('/path/to/file', :encoding => 'windows-1251:utf-8')

Would convert all strings to UTF-8.

Also you can use the more standard encoding name 'ISO-8859-1'

CSV.read('/..', {:headers => true, :col_sep => ';', :encoding => 'ISO-8859-1'})

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