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https://github.com/JamesonHuang/OpenWrt_Luci_Lua.git
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100 lines
2.9 KiB
Lua
100 lines
2.9 KiB
Lua
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--[[
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HTTP protocol implementation for LuCI - mime handling
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(c) 2008 Freifunk Leipzig / Jo-Philipp Wich <xm@leipzig.freifunk.net>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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$Id: mime.lua 5327 2009-09-11 01:55:10Z jow $
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]]--
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--- LuCI http protocol implementation - mime helper class.
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-- This class provides functions to guess mime types from file extensions and
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-- vice versa.
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module("luci.http.protocol.mime", package.seeall)
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require("luci.util")
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--- MIME mapping table containg extension - mimetype relations.
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-- @class table
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MIME_TYPES = {
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["txt"] = "text/plain";
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["js"] = "text/javascript";
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["css"] = "text/css";
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["htm"] = "text/html";
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["html"] = "text/html";
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["patch"] = "text/x-patch";
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["c"] = "text/x-csrc";
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["h"] = "text/x-chdr";
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["o"] = "text/x-object";
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["ko"] = "text/x-object";
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["bmp"] = "image/bmp";
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["gif"] = "image/gif";
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["png"] = "image/png";
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["jpg"] = "image/jpeg";
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["jpeg"] = "image/jpeg";
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["svg"] = "image/svg+xml";
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["zip"] = "application/zip";
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["pdf"] = "application/pdf";
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["xml"] = "application/xml";
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["xsl"] = "application/xml";
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["doc"] = "application/msword";
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["ppt"] = "application/vnd.ms-powerpoint";
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["xls"] = "application/vnd.ms-excel";
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["odt"] = "application/vnd.oasis.opendocument.text";
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["odp"] = "application/vnd.oasis.opendocument.presentation";
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["pl"] = "application/x-perl";
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["sh"] = "application/x-shellscript";
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["php"] = "application/x-php";
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["deb"] = "application/x-deb";
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["iso"] = "application/x-cd-image";
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["tgz"] = "application/x-compressed-tar";
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["mp3"] = "audio/mpeg";
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["ogg"] = "audio/x-vorbis+ogg";
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["wav"] = "audio/x-wav";
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["mpg"] = "video/mpeg";
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["mpeg"] = "video/mpeg";
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["avi"] = "video/x-msvideo";
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}
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--- Extract extension from a filename and return corresponding mime-type or
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-- "application/octet-stream" if the extension is unknown.
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-- @param filename The filename for which the mime type is guessed
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-- @return String containign the determined mime type
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function to_mime(filename)
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if type(filename) == "string" then
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local ext = filename:match("[^%.]+$")
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if ext and MIME_TYPES[ext:lower()] then
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return MIME_TYPES[ext:lower()]
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end
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end
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return "application/octet-stream"
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end
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--- Return corresponding extension for a given mime type or nil if the
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-- given mime-type is unknown.
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-- @param mimetype The mimetype to retrieve the extension from
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-- @return String with the extension or nil for unknown type
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function to_ext(mimetype)
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if type(mimetype) == "string" then
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for ext, type in luci.util.kspairs( MIME_TYPES ) do
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if type == mimetype then
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return ext
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end
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end
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end
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return nil
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end
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