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Versions: 20
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Stored size: 1.92 KB
Contents
# frozen_string_literal: true
module HTTPX
module Transcoder::Multipart
module MimeTypeDetector
module_function
DEFAULT_MIMETYPE = "application/octet-stream"
# inspired by https://github.com/shrinerb/shrine/blob/master/lib/shrine/plugins/determine_mime_type.rb
if defined?(FileMagic)
MAGIC_NUMBER = 256 * 1024
def call(file, _)
return nil if file.eof? # FileMagic returns "application/x-empty" for empty files
mime = FileMagic.open(FileMagic::MAGIC_MIME_TYPE) do |filemagic|
filemagic.buffer(file.read(MAGIC_NUMBER))
end
file.rewind
mime
end
elsif defined?(Marcel)
def call(file, filename)
return nil if file.eof? # marcel returns "application/octet-stream" for empty files
Marcel::MimeType.for(file, name: filename)
end
elsif defined?(MimeMagic)
def call(file, _)
mime = MimeMagic.by_magic(file)
mime.type if mime
end
elsif system("which file", out: File::NULL)
require "open3"
def call(file, _)
return if file.eof? # file command returns "application/x-empty" for empty files
Open3.popen3(*%w[file --mime-type --brief -]) do |stdin, stdout, stderr, thread|
begin
::IO.copy_stream(file, stdin.binmode)
rescue Errno::EPIPE
end
file.rewind
stdin.close
status = thread.value
# call to file command failed
if status.nil? || !status.success?
$stderr.print(stderr.read)
else
output = stdout.read.strip
if output.include?("cannot open")
$stderr.print(output)
else
output
end
end
end
end
else
def call(_, _); end
end
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems