libs/luci-lib-httpprotoutils/luasrc/http/mime.lua

   1 -- Copyright 2008 Freifunk Leipzig / Jo-Philipp Wich <jow@openwrt.org>
   2 -- Licensed to the public under the Apache License 2.0.
   3
   4 -- This class provides functions to guess mime types from file extensions and
   5 -- vice versa.
   6 module("luci.http.mime", package.seeall)
   7
   8 require("luci.util")
   9
  10 MIME_TYPES = {
  11     ["txt"]   = "text/plain";
  12     ["js"]    = "text/javascript";
  13     ["css"]   = "text/css";
  14     ["htm"]   = "text/html";
  15     ["html"]  = "text/html";
  16     ["patch"] = "text/x-patch";
  17     ["c"]     = "text/x-csrc";
  18     ["h"]     = "text/x-chdr";
  19     ["o"]     = "text/x-object";
  20     ["ko"]    = "text/x-object";
  21
  22     ["bmp"]   = "image/bmp";
  23     ["gif"]   = "image/gif";
  24     ["png"]   = "image/png";
  25     ["jpg"]   = "image/jpeg";
  26     ["jpeg"]  = "image/jpeg";
  27     ["svg"]   = "image/svg+xml";
  28
  29     ["zip"]   = "application/zip";
  30     ["pdf"]   = "application/pdf";
  31     ["xml"]   = "application/xml";
  32     ["xsl"]   = "application/xml";
  33     ["doc"]   = "application/msword";
  34     ["ppt"]   = "application/vnd.ms-powerpoint";
  35     ["xls"]   = "application/vnd.ms-excel";
  36     ["odt"]   = "application/vnd.oasis.opendocument.text";
  37     ["odp"]   = "application/vnd.oasis.opendocument.presentation";
  38     ["pl"]    = "application/x-perl";
  39     ["sh"]    = "application/x-shellscript";
  40     ["php"]   = "application/x-php";
  41     ["deb"]   = "application/x-deb";
  42     ["iso"]   = "application/x-cd-image";
  43     ["tgz"]   = "application/x-compressed-tar";
  44
  45     ["mp3"]   = "audio/mpeg";
  46     ["ogg"]   = "audio/x-vorbis+ogg";
  47     ["wav"]   = "audio/x-wav";
  48
  49     ["mpg"]   = "video/mpeg";
  50     ["mpeg"]  = "video/mpeg";
  51     ["avi"]   = "video/x-msvideo";
  52 }
  53
  54 -- "application/octet-stream" if the extension is unknown.
  55 function to_mime(filename)
  56         if type(filename) == "string" then
  57                 local ext = filename:match("[^%.]+$")
  58
  59                 if ext and MIME_TYPES[ext:lower()] then
  60                         return MIME_TYPES[ext:lower()]
  61                 end
  62         end
  63
  64         return "application/octet-stream"
  65 end
  66
  67 -- given mime-type is unknown.
  68 function to_ext(mimetype)
  69         if type(mimetype) == "string" then
  70                 for ext, type in luci.util.kspairs( MIME_TYPES ) do
  71                         if type == mimetype then
  72                                 return ext
  73                         end
  74                 end
  75         end
  76
  77         return nil
  78 end