From bbed3920bc9e93523618a7780295120ffe76c37f Mon Sep 17 00:00:00 2001
From: Vsevolod Stakhov <vsevolod@highsecure.ru>
Date: Thu, 22 Aug 2019 13:00:44 +0100
Subject: [PATCH] [Fix] Lua_mime: Fix reversed extensions map

---
 lualib/lua_mime.lua            | 102 +++++++++++++++++++++++++++------
 src/plugins/lua/mime_types.lua |   8 ---
 2 files changed, 86 insertions(+), 24 deletions(-)

diff --git a/lualib/lua_mime.lua b/lualib/lua_mime.lua
index f3fe46c4e..e00e39325 100644
--- a/lualib/lua_mime.lua
+++ b/lualib/lua_mime.lua
@@ -870,21 +870,91 @@ exports.full_extensions_map = {
 }
 
 -- Used to match extension by content type
-exports.reversed_extensions_map = {}
-
-if #exports.reversed_extensions_map == 0 then
-  -- Fill reversed extensions map
-  for _,pair in ipairs(exports.full_extensions_map) do
-    local ext, ct = pair[1], pair[2]
-
-    if type(ct) == 'table' then
-      for _,rct in ipairs(ct) do
-        exports.reversed_extensions_map[rct] = ext
-      end
-    else
-      exports.reversed_extensions_map[ct] = ext
-    end
-  end
-end
+exports.reversed_extensions_map = {
+  ["text/html"] = "html",
+  ["text/css"] = "css",
+  ["text/xml"] = "xml",
+  ["image/gif"] = "gif",
+  ["image/jpeg"] = "jpeg",
+  ["application/javascript"] = "js",
+  ["application/atom+xml"] = "atom",
+  ["application/rss+xml"] = "rss",
+  ["application/csv"] = "csv",
+  ["text/mathml"] = "mml",
+  ["text/plain"] = "txt",
+  ["text/vnd.sun.j2me.app-descriptor"] = "jad",
+  ["text/vnd.wap.wml"] = "wml",
+  ["text/x-component"] = "htc",
+  ["image/png"] = "png",
+  ["image/svg+xml"] = "svg",
+  ["image/tiff"] = "tiff",
+  ["image/vnd.wap.wbmp"] = "wbmp",
+  ["image/webp"] = "webp",
+  ["image/x-icon"] = "ico",
+  ["image/x-jng"] = "jng",
+  ["image/x-ms-bmp"] = "bmp",
+  ["font/woff"] = "woff",
+  ["font/woff2"] = "woff2",
+  ["application/java-archive"] = "jar",
+  ["application/json"] = "json",
+  ["application/mac-binhex40"] = "hqx",
+  ["application/msword"] = "doc",
+  ["application/pdf"] = "pdf",
+  ["application/postscript"] = "ps",
+  ["application/rtf"] = "rtf",
+  ["application/vnd.apple.mpegurl"] = "m3u8",
+  ["application/vnd.google-earth.kml+xml"] = "kml",
+  ["application/vnd.google-earth.kmz"] = "kmz",
+  ["application/vnd.ms-excel"] = "xls",
+  ["application/vnd.ms-fontobject"] = "eot",
+  ["application/vnd.ms-powerpoint"] = "ppt",
+  ["application/vnd.oasis.opendocument.graphics"] = "odg",
+  ["application/vnd.oasis.opendocument.presentation"] = "odp",
+  ["application/vnd.oasis.opendocument.spreadsheet"] = "ods",
+  ["application/vnd.oasis.opendocument.text"] = "odt",
+  ["application/vnd.openxmlformats-officedocument.presentationml.presentation"] = "pptx",
+  ["application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"] = "xlsx",
+  ["application/vnd.openxmlformats-officedocument.wordprocessingml.document"] = "docx",
+  ["application/x-7z-compressed"] = "7z",
+  ["application/x-cocoa"] = "cco",
+  ["application/x-java-archive-diff"] = "jardiff",
+  ["application/x-java-jnlp-file"] = "jnlp",
+  ["application/x-makeself"] = "run",
+  ["application/x-perl"] = "pl",
+  ["application/x-pilot"] = "pdb",
+  ["application/x-rar-compressed"] = "rar",
+  ["application/x-redhat-package-manager"] = "rpm",
+  ["application/x-sea"] = "sea",
+  ["application/x-shockwave-flash"] = "swf",
+  ["application/x-stuffit"] = "sit",
+  ["application/x-tcl"] = "tcl",
+  ["application/x-x509-ca-cert"] = "crt",
+  ["application/x-xpinstall"] = "xpi",
+  ["application/xhtml+xml"] = "xhtml",
+  ["application/xspf+xml"] = "xspf",
+  ["application/zip"] = "zip",
+  ["application/x-dosexec"] = "exe",
+  ["application/x-msdownload"] = "exe",
+  ["application/x-executable"] = "exe",
+  ["text/x-msdos-batch"] = "bat",
+
+  ["audio/midi"] = "mid",
+  ["audio/mpeg"] = "mp3",
+  ["audio/ogg"] = "ogg",
+  ["audio/x-m4a"] = "m4a",
+  ["audio/x-realaudio"] = "ra",
+  ["video/3gpp"] = "3gpp",
+  ["video/mp2t"] = "ts",
+  ["video/mp4"] = "mp4",
+  ["video/mpeg"] = "mpeg",
+  ["video/quicktime"] = "mov",
+  ["video/webm"] = "webm",
+  ["video/x-flv"] = "flv",
+  ["video/x-m4v"] = "m4v",
+  ["video/x-mng"] = "mng",
+  ["video/x-ms-asf"] = "asx",
+  ["video/x-ms-wmv"] = "wmv",
+  ["video/x-msvideo"] = "avi",
+}
 
 return exports
\ No newline at end of file
diff --git a/src/plugins/lua/mime_types.lua b/src/plugins/lua/mime_types.lua
index d571f679a..de53b74a7 100644
--- a/src/plugins/lua/mime_types.lua
+++ b/src/plugins/lua/mime_types.lua
@@ -547,14 +547,6 @@ if opts then
     end
   end
 
-  for ext,inner_tbl in pairs(settings.extension_map) do
-    for _,elt in ipairs(inner_tbl) do
-      if not lua_mime.reversed_extensions_map[elt.ct] then
-        lua_mime.reversed_extensions_map[elt.ct] = ext
-      end
-    end
-  end
-
   local map_type = 'map'
   if settings['regexp'] then map_type = 'regexp' end
   map = lua_maps.rspamd_map_add('mime_types', 'file', map_type,
-- 
2.39.5