/usr/lib/cgi-bin/dhelp_fetcher is in dhelp 0.6.21+nmu6.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 | #!/usr/bin/ruby -w
require 'cgi'
require 'erb'
require 'gettext'
require 'zlib'
require 'dhelp'
MIMETYPES_FILE = '/etc/mime.types'
ERROR_TEMPLATE = '/usr/share/dhelp/templates/fetcher_error.rhtml'
def error(message)
print "Content-Type: text/html\n\n"
tmpl = ERB.new(File.read(ERROR_TEMPLATE))
@message = message
puts tmpl.result(binding)
exit 1
end
def _(message)
GetText.bindtextdomain('dhelp')
GetText._(message)
end
def content_type(path)
path =~ /\.([^.]+)$/
ext = $1
# Search in the mime.types file
File.readlines(MIMETYPES_FILE).each do |line|
line =~ /^(\S+)\s+(.*)/
mime, exts = $1, ($2 || "").split(/\s+/)
return mime if exts.include? ext
end
return "text/plain"
end
cgi = CGI.new
file = cgi.params['file'].first
# Search for the file in the doc-base database
if file.kind_of? String
db = Dhelp::DocDirDatabase.open
begin
doc_id, title = db.info_for_path(File.dirname(file))
rescue Dhelp::KeyNotFoundError
error("I can't find #{file} in the doc-base documentation")
end
if not File.readable? file
error("I can't read file '#{file}'. Maybe the package containing it was uninstalled?")
end
# Everything is fine, return the document
# HTML pages are handled as redirections if they're visible (to avoid
# problems with relative links)
if file =~ Regexp.new('/usr/share(/doc/.*\\.html?)$')
url = $1
cgi.out("Status" => 302,
"Location" => url) { "" }
exit 0
end
# If it's compressed, uncompress first
if file =~ /\.gz$/
print "Content-Type: #{content_type(file.sub(/\.gz$/, ''))}\n\n"
Zlib::GzipReader.open(file) {|gz|
print gz.read
}
else
print "Content-Type: #{content_type(file)}\n\n"
print File.read(file)
end
else
error("You have to specify a parameter 'file'")
end
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