This directory contains the implementation of the protocols FTP, HTTP and SMTP, the URL parsing and composition module and the Concat and Code auxiliary modules. The files provided are: http.lua -- HTTP protocol implementation The module http.lua provides general HTTP client support. The implementation conforms to the HTTP/1.1 standard, RFC 2068. smtp.lua -- SMTP protocol implementation The module smtp.lua provides functionality to send e-mail messages to a SMTP mail server. The implementation conforms to RFC 821. ftp.lua -- FTP protocol implementation The module ftp.lua provides functions to download and upload files from and to FTP servers. The implementation conforms to RFC 959. url.lua -- URL parsing and composition The module url.lua provides routines to split a URL into its components and to compose a base URL and relative URL into an absolute URL. code.lua -- some coding conversion routines The code.lua module provides base64, hexa and escaped encoding and decoding. The module is used for the HTTP Basic Authentication Scheme, and URL protection, conforming to RFC 2045. concat.lua -- fast concatenation library The module concat.lua implements, completely in Lua, a set of functions that greatly improves the performance of repeated concatenations of Lua strings. The algorithm was inventd by Roberto Ierusalimschy. These modules are part of the LuaSocket library and are supported. Please send any comments to diego@tecgraf.puc-rio.br.