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|
# lirs.rb - LIRS library
#
# Copyright (C) 2003,2006 Tanaka Akira <akr@fsij.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
class LIRS
RecordHeader = 'LIRS'
def LIRS.load(filename)
File.open(filename) {|f|
begin
return decode(f)
rescue LIRS::Error
$!.message[0,0] = "#{filename}: "
raise
end
}
end
def LIRS.decode(f)
lirs = LIRS.new
f.each_line {|line|
lirs << Record.decode(line) if /^#/ !~ line
}
lirs
end
def initialize
@record = {}
end
def size
@record.size
end
def <<(record)
@record[record.target_url] = record
end
def each
@record.each {|url, record|
yield record
}
end
def [](url)
@record[url]
end
class Record
def Record.decode(l)
l = l.sub(/\r?\n\z/, '')
a = []
l.scan(/((?:[^,\\]|\\.)*),/m) {|quoted_field,|
a.push(quoted_field.gsub(/\\(.)/m) { $1 })
}
record_header = a.shift
raise LIRS::Error.new("no record header") if record_header != RecordHeader
raise LIRS::Error.new("too few record fields") if a.length < 8
return Record.new(*a)
end
def initialize(last_modified,
last_detected,
timezone,
content_length,
target_url,
target_title,
target_maintainer,
antenna_url,
*extension_fields)
@last_modified = last_modified
@last_detected = last_detected
@time_zone = timezone
@content_length = content_length
@target_url = target_url
@target_title = target_title
@target_maintainer = target_maintainer
@antenna_url = antenna_url
@extension_fields = extension_fields
end
attr_reader :last_modified,
:last_detected,
:time_zone,
:content_length,
:target_url,
:target_title,
:target_maintainer,
:antenna_url,
:extension_fields
def encode
l = ''
fs = [
RecordHeader,
@last_modified,
@last_detected,
@time_zone,
@content_length,
@target_url,
@target_title,
@target_maintainer,
@antenna_url,
*@extension_fields
].each {|f|
l << f.gsub(/[,\\]/) { "\\#{$&}" } << ','
}
l << "\n"
return l
end
end
class Error < StandardError
end
end
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