MIMEBuilder Ruby

This library creates MIME parts from limited information. The MIME parts are based on the Ruby mime library and are all sub-classes of MIME::Media.

Add mime_builder to Gemfile and then run bundle:

$ echo "gem 'mime_builder'" >> Gemfile
$ bundle

$ gem install mime_builder

Builds a MIME::Application or MIME::Type object depending on whether base64 encoding is selected. This reads bytes from filesystem and populates the following MIME headers:

1. Content-Disposition
2. Content-Transfer-Encoding
3. Content-Type

This will optionally delete the following auto-generated header:

1. Content-Id

builder = MIMEBuilder::Filepath.new '/path/to/file'
mime_part = builder.mime

Options:

builder = MIMEBuilder::Filepath.new(
  '/path/to/file',
  base64_encode: true,        # base64 encode part
  content_id_disable: true,   # remove auto-generated Content-Id header
  content_type: 'text/plain', # override auto-generated Content-Type
  is_attachment: true         # add 'attachment' disposition
)

Builds a MIME::Text object. This accepts a string and can optionally populate the following headers:

1. Content-Disposition
2. Content-Type

This will optionally delete the following auto-generated header:

1. Content-Id

builder = MIMEBuilder::Text.new 'Hi there!' 
mime_part = builder.mime

Options:

builder = MIMEBuilder::Text.new(
  'Hi there!',
  content_id_disable: true, # remove auto-generated Content-Id header
  content_type: 'text/html' # override auto-generated Content-Type
)

Builds a MIME::Text object. This accepts a string, hash, or array.

This will optionally:

1. delete the following auto-generated Content-Id
2. base64 encode the content

builder = MIMEBuilder::JSON.new { foo: 'bar' }
mime_part = builder.mime

Options:

builder = MIMEBuilder::JSON.new(
  { foo: 'bar' },
  content_id_disable: true, # remove auto-generated Content-Id header
  base64_encode: false      # disable default base64 encoding
)

See CHANGELOG.md

Project Repo

• https://github.com/grokify/mime-builder-ruby

MIME Library

• https://rubygems.org/gems/mime
• https://bitbucket.org/pachl/mime/src

Any reports of problems, comments or suggestions are most welcome.

Please report these on Github

MIMEBuilder is available under an MIT-style license. See LICENSE.md for details.

MIMEBuilder © 2016-2023 by John Wang