Fix wrong directory in luci-base

[project/luci.git] / modules / base / luasrc / http / protocol / mime.lua

diff --git a/modules/base/luasrc/http/protocol/mime.lua b/modules/base/luasrc/http/protocol/mime.lua
new file mode 100644 (file)
index 0000000..c878160
--- /dev/null
+++ b/modules/base/luasrc/http/protocol/mime.lua
@@ -0,0 +1,99 @@
+--[[
+
+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