1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
-- 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 server = require"net.http.server";
local lfs = require "lfs";
local os_date = os.date;
local open = io.open;
local stat = lfs.attributes;
local build_path = require"socket.url".build_path;
local path_sep = package.config:sub(1,1);
local base_path = module:get_option_string("http_files_dir", module:get_option_string("http_path"));
local dir_indices = module:get_option("http_index_files", { "index.html", "index.htm" });
local directory_index = module:get_option_boolean("http_dir_listing");
local mime_map = module:shared("/*/http_files/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("/*/http_files/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 forbidden_chars_pattern = "[/%z]";
if prosody.platform == "windows" then
forbidden_chars_pattern = "[/%z\001-\031\127\"*:<>?|]"
end
local urldecode = require "util.http".urldecode;
function sanitize_path(path)
if not path then return end
local out = {};
local c = 0;
for component in path:gmatch("([^/]+)") do
component = urldecode(component);
if component:find(forbidden_chars_pattern) then
return nil;
elseif component == ".." then
if c <= 0 then
return nil;
end
out[c] = nil;
c = c - 1;
elseif component ~= "." then
c = c + 1;
out[c] = component;
end
end
if path:sub(-1,-1) == "/" then
out[c+1] = "";
end
return "/"..table.concat(out, "/");
end
local cache = setmetatable({}, { __mode = "kv" }); -- Let the garbage collector have it if it wants to.
function serve(opts)
if type(opts) ~= "table" then -- assume path string
opts = { path = opts };
end
local base_path = opts.path;
local dir_indices = opts.index_files or dir_indices;
local directory_index = opts.directory_index;
local function serve_file(event, path)
local request, response = event.request, event.response;
local sanitized_path = sanitize_path(path);
if path and not sanitized_path then
return 400;
end
path = sanitized_path;
local orig_path = sanitize_path(request.path);
local full_path = base_path .. (path or ""):gsub("/", path_sep);
local attr = stat(full_path:match("^.*[^\\/]")); -- Strip trailing path separator because Windows
if not attr then
return 404;
end
local request_headers, response_headers = request.headers, response.headers;
local last_modified = os_date('!%a, %d %b %Y %H:%M:%S GMT', attr.modification);
response_headers.last_modified = last_modified;
local etag = ("%02x-%x-%x-%x"):format(attr.dev or 0, attr.ino or 0, attr.size or 0, attr.modification or 0);
response_headers.etag = etag;
local if_none_match = request_headers.if_none_match
local if_modified_since = request_headers.if_modified_since;
if etag == if_none_match
or (not if_none_match and last_modified == if_modified_since) then
return 304;
end
local data = cache[orig_path];
if data and data.etag == etag then
response_headers.content_type = data.content_type;
data = data.data;
elseif attr.mode == "directory" and path then
if full_path:sub(-1) ~= "/" then
local path = { is_absolute = true, is_directory = true };
for dir in orig_path:gmatch("[^/]+") do path[#path+1]=dir; end
response_headers.location = build_path(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 directory_index then
data = server._events.fire_event("directory-index", { path = request.path, full_path = full_path });
end
if not data then
return 403;
end
cache[orig_path] = { data = data, content_type = mime_map.html; etag = etag; };
response_headers.content_type = mime_map.html;
else
local f, err = open(full_path, "rb");
if f then
data, err = f:read("*a");
f:close();
end
if not data then
module:log("debug", "Could not open or read %s. Error was %s", full_path, err);
return 403;
end
local ext = full_path:match("%.([^./]+)$");
local content_type = ext and mime_map[ext];
cache[orig_path] = { data = data; content_type = content_type; etag = etag };
response_headers.content_type = content_type;
end
return response:send(data);
end
return serve_file;
end
function wrap_route(routes)
for route,handler in pairs(routes) do
if type(handler) ~= "function" then
routes[route] = serve(handler);
end
end
return routes;
end
if base_path then
module:provides("http", {
route = {
["GET /*"] = serve {
path = base_path;
directory_index = directory_index;
}
};
});
else
module:log("debug", "http_files_dir not set, assuming use by some other module");
end
|
