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Contents
module Praxis
module ContentTypeParser
REGEXP = /^
\s*
(?<type>[^+;\s]+)
(\+(?<sub_type>[^;\s]+))?
(\s*;\s*)?
(?<params>.*?)?
(\s*;\s*)?
$/x
# Parses Content type
#
# @param [String] Content type to parse
# @return [Hash] A hash with keys: :type, :sub_type(optional) and :params(optional)
# @raise [ArgumentError] It fails when blank or weird content type is provided
#
# @example
# parse(nil) #=> Exception: Content type does not have any type defined (ArgumentError)
# parse('+json') #=> Exception: Content type does not have any type defined (ArgumentError)
# parse(';p1=11') #=> Exception: Content type does not have any type defined (ArgumentError)
#
# @example
# parse('text/xml') #=>
# {:type => "text/xml",
# :sub_type => nil,
# :params => {}}
#
# @example
# parse('application/vnd.something+json') #=>
# {:type => "application/vnd.something",
# :sub_type => "json",
# :params => {}}
#
# @example
# parse('application/vnd.something+json;p1=1.0;param_with_noval;p2=a13') #=>
# {:type => "application/vnd.something",
# :sub_type => "json",
# :params => {"p1"=>"1.0", "param_with_noval"=>nil, "p2"=>"a13"}}
#
def self.parse(content_type)
parsed = REGEXP.match(content_type.to_s)
raise(ArgumentError, 'Content type does not have any type defined') unless parsed
result = {
type: parsed[:type]
}
result[:sub_type] = parsed[:sub_type] if parsed[:sub_type]
if parsed[:params]
params = {}
parsed[:params].split(';').each do |param|
key, value = param.split('=')
key = key.to_s.strip
next if key.empty?
params[key.strip] = value && value.strip
end
result[:params] = params unless params.empty?
end
result
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems