prosody
c93fdec624c7
net/http/files.lua

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net/http/files.lua @ 9948:c93fdec624c7

net.http.files: Copy of mod_http_files The intent is to make it easier to reuse and simplify mod_http_files. Currently modules will use the serve() function exported by mod_http_files in order to serve their own files. This makes it unclear whether mod_http_files should be doing anything on its own. Moving the logic into a separate module should help here, as well as make re-use outside of prosody easier.
author Kim Alvefur <zash@zash.se>
date Fri, 05 Apr 2019 16:10:51 +0200
parent 9463:plugins/mod_http_files.lua@f7530c846f98
child 9949:a39f3681d685
comparison
equal deleted inserted replaced
9947:8ebca1240203 9948:c93fdec624c7
1 -- Prosody IM
2 -- Copyright (C) 2008-2010 Matthew Wild
3 -- Copyright (C) 2008-2010 Waqas Hussain
4 --
5 -- This project is MIT/X11 licensed. Please see the
6 -- COPYING file in the source package for more information.
7 --
8
9 module:depends("http");
10 local server = require"net.http.server";
11 local lfs = require "lfs";
12
13 local os_date = os.date;
14 local open = io.open;
15 local stat = lfs.attributes;
16 local build_path = require"socket.url".build_path;
17 local path_sep = package.config:sub(1,1);
18
19 local base_path = module:get_option_path("http_files_dir", module:get_option_path("http_path"));
20 local cache_size = module:get_option_number("http_files_cache_size", 128);
21 local cache_max_file_size = module:get_option_number("http_files_cache_max_file_size", 4096);
22 local dir_indices = module:get_option_array("http_index_files", { "index.html", "index.htm" });
23 local directory_index = module:get_option_boolean("http_dir_listing");
24
25 local mime_map = module:shared("/*/http_files/mime").types;
26 if not mime_map then
27 mime_map = {
28 html = "text/html", htm = "text/html",
29 xml = "application/xml",
30 txt = "text/plain",
31 css = "text/css",
32 js = "application/javascript",
33 png = "image/png",
34 gif = "image/gif",
35 jpeg = "image/jpeg", jpg = "image/jpeg",
36 svg = "image/svg+xml",
37 };
38 module:shared("/*/http_files/mime").types = mime_map;
39
40 local mime_types, err = open(module:get_option_path("mime_types_file", "/etc/mime.types", "config"), "r");
41 if mime_types then
42 local mime_data = mime_types:read("*a");
43 mime_types:close();
44 setmetatable(mime_map, {
45 __index = function(t, ext)
46 local typ = mime_data:match("\n(%S+)[^\n]*%s"..(ext:lower()).."%s") or "application/octet-stream";
47 t[ext] = typ;
48 return typ;
49 end
50 });
51 end
52 end
53
54 local forbidden_chars_pattern = "[/%z]";
55 if prosody.platform == "windows" then
56 forbidden_chars_pattern = "[/%z\001-\031\127\"*:<>?|]"
57 end
58
59 local urldecode = require "util.http".urldecode;
60 function sanitize_path(path)
61 if not path then return end
62 local out = {};
63
64 local c = 0;
65 for component in path:gmatch("([^/]+)") do
66 component = urldecode(component);
67 if component:find(forbidden_chars_pattern) then
68 return nil;
69 elseif component == ".." then
70 if c <= 0 then
71 return nil;
72 end
73 out[c] = nil;
74 c = c - 1;
75 elseif component ~= "." then
76 c = c + 1;
77 out[c] = component;
78 end
79 end
80 if path:sub(-1,-1) == "/" then
81 out[c+1] = "";
82 end
83 return "/"..table.concat(out, "/");
84 end
85
86 local cache = require "util.cache".new(cache_size);
87
88 function serve(opts)
89 if type(opts) ~= "table" then -- assume path string
90 opts = { path = opts };
91 end
92 -- luacheck: ignore 431
93 local base_path = opts.path;
94 local dir_indices = opts.index_files or dir_indices;
95 local directory_index = opts.directory_index;
96 local function serve_file(event, path)
97 local request, response = event.request, event.response;
98 local sanitized_path = sanitize_path(path);
99 if path and not sanitized_path then
100 return 400;
101 end
102 path = sanitized_path;
103 local orig_path = sanitize_path(request.path);
104 local full_path = base_path .. (path or ""):gsub("/", path_sep);
105 local attr = stat(full_path:match("^.*[^\\/]")); -- Strip trailing path separator because Windows
106 if not attr then
107 return 404;
108 end
109
110 local request_headers, response_headers = request.headers, response.headers;
111
112 local last_modified = os_date('!%a, %d %b %Y %H:%M:%S GMT', attr.modification);
113 response_headers.last_modified = last_modified;
114
115 local etag = ('"%02x-%x-%x-%x"'):format(attr.dev or 0, attr.ino or 0, attr.size or 0, attr.modification or 0);
116 response_headers.etag = etag;
117
118 local if_none_match = request_headers.if_none_match
119 local if_modified_since = request_headers.if_modified_since;
120 if etag == if_none_match
121 or (not if_none_match and last_modified == if_modified_since) then
122 return 304;
123 end
124
125 local data = cache:get(orig_path);
126 if data and data.etag == etag then
127 response_headers.content_type = data.content_type;
128 data = data.data;
129 elseif attr.mode == "directory" and path then
130 if full_path:sub(-1) ~= "/" then
131 local dir_path = { is_absolute = true, is_directory = true };
132 for dir in orig_path:gmatch("[^/]+") do dir_path[#dir_path+1]=dir; end
133 response_headers.location = build_path(dir_path);
134 return 301;
135 end
136 for i=1,#dir_indices do
137 if stat(full_path..dir_indices[i], "mode") == "file" then
138 return serve_file(event, path..dir_indices[i]);
139 end
140 end
141
142 if directory_index then
143 data = server._events.fire_event("directory-index", { path = request.path, full_path = full_path });
144 end
145 if not data then
146 return 403;
147 end
148 cache:set(orig_path, { data = data, content_type = mime_map.html; etag = etag; });
149 response_headers.content_type = mime_map.html;
150
151 else
152 local f, err = open(full_path, "rb");
153 if not f then
154 module:log("debug", "Could not open %s. Error was %s", full_path, err);
155 return 403;
156 end
157 local ext = full_path:match("%.([^./]+)$");
158 local content_type = ext and mime_map[ext];
159 response_headers.content_type = content_type;
160 if attr.size > cache_max_file_size then
161 response_headers.content_length = attr.size;
162 module:log("debug", "%d > cache_max_file_size", attr.size);
163 return response:send_file(f);
164 else
165 data = f:read("*a");
166 f:close();
167 end
168 cache:set(orig_path, { data = data; content_type = content_type; etag = etag });
169 end
170
171 return response:send(data);
172 end
173
174 return serve_file;
175 end
176
177 function wrap_route(routes)
178 for route,handler in pairs(routes) do
179 if type(handler) ~= "function" then
180 routes[route] = serve(handler);
181 end
182 end
183 return routes;
184 end
185
186 if base_path then
187 module:provides("http", {
188 route = {
189 ["GET /*"] = serve {
190 path = base_path;
191 directory_index = directory_index;
192 }
193 };
194 });
195 else
196 module:log("debug", "http_files_dir not set, assuming use by some other module");
197 end
198