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--[[
HTTP protocol implementation for LuCI - mime handling
(c) 2008 Freifunk Leipzig / Jo-Philipp Wich <xm@leipzig.freifunk.net>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
$Id$
]]--
--- LuCI http protocol implementation - mime helper class.
-- This class provides functions to guess mime types from file extensions and
-- vice versa.
module("luci.http.protocol.mime", package.seeall)
require("luci.util")
--- MIME mapping table containg extension - mimetype relations.
-- @class table
MIME_TYPES = {
["txt"] = "text/plain";
["js"] = "text/javascript";
["css"] = "text/css";
["htm"] = "text/html";
["html"] = "text/html";
["patch"] = "text/x-patch";
["c"] = "text/x-csrc";
["h"] = "text/x-chdr";
["o"] = "text/x-object";
["ko"] = "text/x-object";
["bmp"] = "image/bmp";
["gif"] = "image/gif";
["png"] = "image/png";
["jpg"] = "image/jpeg";
["jpeg"] = "image/jpeg";
["svg"] = "image/svg+xml";
["zip"] = "application/zip";
["pdf"] = "application/pdf";
["xml"] = "application/xml";
["xsl"] = "application/xml";
["doc"] = "application/msword";
["ppt"] = "application/vnd.ms-powerpoint";
["xls"] = "application/vnd.ms-excel";
["odt"] = "application/vnd.oasis.opendocument.text";
["odp"] = "application/vnd.oasis.opendocument.presentation";
["pl"] = "application/x-perl";
["sh"] = "application/x-shellscript";
["php"] = "application/x-php";
["deb"] = "application/x-deb";
["iso"] = "application/x-cd-image";
["tgz"] = "application/x-compressed-tar";
["mp3"] = "audio/mpeg";
["ogg"] = "audio/x-vorbis+ogg";
["wav"] = "audio/x-wav";
["mpg"] = "video/mpeg";
["mpeg"] = "video/mpeg";
["avi"] = "video/x-msvideo";
}
--- Extract extension from a filename and return corresponding mime-type or
-- "application/octet-stream" if the extension is unknown.
-- @param filename The filename for which the mime type is guessed
-- @return String containign the determined mime type
function to_mime(filename)
if type(filename) == "string" then
local ext = filename:match("[^%.]+$")
if ext and MIME_TYPES[ext:lower()] then
return MIME_TYPES[ext:lower()]
end
end
return "application/octet-stream"
end
--- Return corresponding extension for a given mime type or nil if the
-- given mime-type is unknown.
-- @param mimetype The mimetype to retrieve the extension from
-- @return String with the extension or nil for unknown type
function to_ext(mimetype)
if type(mimetype) == "string" then
for ext, type in luci.util.kspairs( MIME_TYPES ) do
if type == mimetype then
return ext
end
end
end
return nil
end
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