prosody
4ddf3ba0c749
plugins/mod_http_errors.lua

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plugins/mod_http_errors.lua @ 4711:4ddf3ba0c749

mod_http_errors: Module to handle HTTP errors with a HTML page
author Matthew Wild <mwild1@gmail.com>
date Thu, 26 Apr 2012 15:16:29 +0100
child 4737:7b9e2a8c4710
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4710:54ca6511e699 4711:4ddf3ba0c749
1 module:set_global();
2 module:depends("http");
3
4 local server = require "net.http.server";
5 local codes = require "net.http.codes";
6 local termcolours = require "util.termcolours";
7
8 local show_private = module:get_option_boolean("http_errors_detailed", false);
9
10 local default_messages = {
11 [400] = { "What kind of request do you call that??" };
12 [403] = { "You're not allowed to do that." };
13 [404] = { "Whatever you were looking for is not here. %";
14 "Where did you put it?", "It's behind you.", "Keep looking." };
15 [500] = { "% Check your error log for more info.";
16 "Gremlins.", "It broke.", "Don't look at me." };
17 };
18
19 local messages = setmetatable(module:get_option("http_errors_messages", {}), { __index = default_messages });
20
21 local html = [[
22 <!DOCTYPE html>
23 <html>
24 <head>
25 <meta charset="utf-8">
26 <style>
27 body{
28 margin-top:14%;
29 text-align:center;
30 background-color:#F8F8F8;
31 font-family:sans-serif;
32 }
33 h1{
34 font-size:xx-large;
35 }
36 p{
37 font-size:x-large;
38 }
39 p+p { font-size: large; font-family: courier }
40 </style>
41 </head>
42 <body>
43 <h1>$title</h1>
44 <p>$message</p>
45 <p>$extra</p>
46 </body>
47 </html>]];
48 html = html:gsub("%s%s+", "");
49
50 local entities = {
51 ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;",
52 ["'"] = "&apos;", ["\""] = "&quot;", ["\n"] = "<br/>",
53 };
54
55 local function tohtml(plain)
56 return (plain:gsub("[<>&'\"\n]", entities));
57
58 end
59
60 local function get_page(code, extra)
61 local message = messages[code];
62 if message then
63 return (html:gsub("$(%a+)", {
64 title = rawget(codes, code) or ("Code "..tostring(code));
65 message = message[1]:gsub("%%", function ()
66 return message[math.random(2, math.max(#message,2))];
67 end);
68 extra = tohtml(extra or "");
69 }));
70 end
71 end
72
73 module:hook_object_event(server, "http-error", function (event)
74 return get_page(event.code, (show_private and event.private_message) or event.message);
75 end);