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# frozen_string_literal: true
require 'mail/utilities'
require 'mail/parser_tools'
begin
original_verbose, $VERBOSE = $VERBOSE, nil
%%{
machine content_disposition;
alphtype int;
# Disposition Type
action disp_type_s { disp_type_s = p }
action disp_type_e { content_disposition.disposition_type = chars(data, disp_type_s, p-1).downcase }
# Parameter Attribute
action param_attr_s { param_attr_s = p }
action param_attr_e { param_attr = chars(data, param_attr_s, p-1) }
# Quoted String
action qstr_s { qstr_s = p }
action qstr_e { qstr = chars(data, qstr_s, p-1) }
# Parameter Value
action param_val_s { param_val_s = p }
action param_val_e {
if param_attr.nil?
raise Mail::Field::ParseError.new(Mail::ContentDispositionElement, data, "no attribute for value")
end
# Use quoted string value if one exists, otherwise use parameter value
value = qstr || chars(data, param_val_s, p-1)
content_disposition.parameters << { param_attr => value }
param_attr = nil
qstr = nil
}
# No-op actions
action comment_e { }
action comment_s { }
action phrase_e { }
action phrase_s { }
action main_type_e { }
action main_type_s { }
action sub_type_e { }
action sub_type_s { }
include rfc2183_content_disposition "rfc2183_content_disposition.rl";
main := disposition;
}%%
module Mail::Parsers
module ContentDispositionParser
extend Mail::ParserTools
ContentDispositionStruct = Struct.new(:disposition_type, :parameters, :error)
%%write data noprefix;
def self.parse(data)
data = data.dup.force_encoding(Encoding::ASCII_8BIT) if data.respond_to?(:force_encoding)
content_disposition = ContentDispositionStruct.new('', [])
return content_disposition if Mail::Utilities.blank?(data)
# Parser state
disp_type_s = param_attr_s = param_attr = qstr_s = qstr = param_val_s = nil
# 5.1 Variables Used by Ragel
p = 0
eof = pe = data.length
stack = []
%%write init;
%%write exec;
if p != eof || cs < %%{ write first_final; }%%
raise Mail::Field::IncompleteParseError.new(Mail::ContentDispositionElement, data, p)
end
content_disposition
end
end
end
ensure
$VERBOSE = original_verbose
end
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