mod_http_files: Generate simple directory index.
-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
module:depends("http");
local lfs = require "lfs";
local os_date = os.date;
local open = io.open;
local stat = lfs.attributes;
local http_base = module:get_option_string("http_files_dir", module:get_option_string("http_path", "www_files"));
local dir_indices = module:get_option("http_files_index", { "index.html", "index.htm" });
local show_file_list = module:get_option_boolean("http_files_show_list");
local mime_map = module:shared("mime").types;
if not mime_map then
mime_map = {
html = "text/html", htm = "text/html",
xml = "application/xml",
txt = "text/plain",
css = "text/css",
js = "application/javascript",
png = "image/png",
gif = "image/gif",
jpeg = "image/jpeg", jpg = "image/jpeg",
svg = "image/svg+xml",
};
module:shared("mime").types = mime_map;
local mime_types, err = open(module:get_option_string("mime_types_file", "/etc/mime.types"),"r");
if mime_types then
local mime_data = mime_types:read("*a");
mime_types:close();
setmetatable(mime_map, {
__index = function(t, ext)
local typ = mime_data:match("\n(%S+)[^\n]*%s"..(ext:lower()).."%s") or "application/octet-stream";
t[ext] = typ;
return typ;
end
});
end
end
local cache = setmetatable({}, { __mode = "kv" }); -- Let the garbage collector have it if it wants to.
function serve_file(event, path)
local request, response = event.request, event.response;
local orig_path = request.path;
local full_path = http_base.."/"..path;
local attr = stat(full_path);
if not attr then
return 404;
end
response.headers.last_modified = os_date('!%a, %d %b %Y %H:%M:%S GMT', attr.modification);
local tag = ("%02x-%x-%x-%x"):format(attr.dev or 0, attr.ino or 0, attr.size or 0, attr.modification or 0);
response.headers.etag = tag;
if tag == request.headers.if_none_match then
return 304;
end
local data = cache[path];
if data then
response.headers.content_type = data.content_type;
data = data.data;
elseif attr.mode == "directory" then
if full_path:sub(-1) ~= "/" then
response.headers.location = orig_path.."/";
return 301;
end
for i=1,#dir_indices do
if stat(full_path..dir_indices[i], "mode") == "file" then
return serve_file(event, path..dir_indices[i]);
end
end
if not show_file_list then
return 403;
else
local html = require"util.stanza".stanza("html")
:tag("head"):tag("title"):text(path):up()
:tag("meta", { charset="utf-8" }):up()
:up()
:tag("body"):tag("h1"):text(path):up()
:tag("ul");
for file in lfs.dir(full_path) do
if file:sub(1,1) ~= "." then
local attr = stat(full_path..file) or {};
html:tag("li", { class = attr.mode })
:tag("a", { href = file }):text(file)
:up():up();
end
end
data = "<!DOCTYPE html>\n"..tostring(html);
cache[path] = { data = html, content_type = mime_map.html; hits = 0 };
response.headers.content_type = mime_map.html;
end
else
local f = open(full_path, "rb");
data = f and f:read("*a");
f:close();
if not data then
return 403;
end
local ext = path:match("%.([^.]*)$");
local content_type = mime_map[ext];
cache[path] = { data = data; content_type = content_type; };
response.headers.content_type = content_type;
end
return response:send(data);
end
module:provides("http", {
route = {
["GET /*"] = serve_file;
};
});