Mercurial > luasocket
diff samples/cddb.lua @ 0:4b915342e2a8
LuaSocket 2.0.2 + CMake build description.
author | Eric Wing <ewing . public |-at-| gmail . com> |
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date | Tue, 26 Aug 2008 18:40:01 -0700 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/samples/cddb.lua Tue Aug 26 18:40:01 2008 -0700 @@ -0,0 +1,46 @@ +local socket = require("socket") +local http = require("socket.http") + +if not arg or not arg[1] or not arg[2] then + print("luasocket cddb.lua <category> <disc-id> [<server>]") + os.exit(1) +end + +local server = arg[3] or "http://freedb.freedb.org/~cddb/cddb.cgi" + +function parse(body) + local lines = string.gfind(body, "(.-)\r\n") + local status = lines() + local code, message = socket.skip(2, string.find(status, "(%d%d%d) (.*)")) + if tonumber(code) ~= 210 then + return nil, code, message + end + local data = {} + for l in lines do + local c = string.sub(l, 1, 1) + if c ~= '#' and c ~= '.' then + local key, value = socket.skip(2, string.find(l, "(.-)=(.*)")) + value = string.gsub(value, "\\n", "\n") + value = string.gsub(value, "\\\\", "\\") + value = string.gsub(value, "\\t", "\t") + data[key] = value + end + end + return data, code, message +end + +local host = socket.dns.gethostname() +local query = "%s?cmd=cddb+read+%s+%s&hello=LuaSocket+%s+LuaSocket+2.0&proto=6" +local url = string.format(query, server, arg[1], arg[2], host) +local body, headers, code = http.get(url) + +if code == 200 then + local data, code, error = parse(body) + if not data then + print(error or code) + else + for i,v in pairs(data) do + io.write(i, ': ', v, '\n') + end + end +else print(error) end