prosody
755f705f126a
plugins/mod_http_errors.lua

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plugins/mod_http_errors.lua @ 5513:755f705f126a

util.adhoc: New util for generating common adhoc handler patterns
author Florian Zeitz <florob@babelmonkeys.de>
date Tue, 23 Apr 2013 14:49:31 +0200
parent 5371:706206e191e8
child 5776:bd0ff8ae98a8
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1 module:set_global();
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2
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3 local server = require "net.http.server";
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4 local codes = require "net.http.codes";
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5
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6 local show_private = module:get_option_boolean("http_errors_detailed", false);
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7 local always_serve = module:get_option_boolean("http_errors_always_show", true);
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8 local default_message = { module:get_option_string("http_errors_default_message", "That's all I know.") };
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9 local default_messages = {
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10 [400] = { "What kind of request do you call that??" };
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11 [403] = { "You're not allowed to do that." };
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12 [404] = { "Whatever you were looking for is not here. %";
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13 "Where did you put it?", "It's behind you.", "Keep looking." };
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14 [500] = { "% Check your error log for more info.";
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15 "Gremlins.", "It broke.", "Don't look at me." };
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16 };
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17
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18 local messages = setmetatable(module:get_option("http_errors_messages", {}), { __index = default_messages });
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19
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20 local html = [[
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21 <!DOCTYPE html>
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22 <html>
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23 <head>
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24 <meta charset="utf-8">
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25 <style>
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26 body{
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27 margin-top:14%;
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28 text-align:center;
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29 background-color:#F8F8F8;
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30 font-family:sans-serif;
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31 }
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32 h1{
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33 font-size:xx-large;
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34 }
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35 p{
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36 font-size:x-large;
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37 }
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38 p+p { font-size: large; font-family: courier }
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39 </style>
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40 </head>
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41 <body>
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42 <h1>$title</h1>
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43 <p>$message</p>
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44 <p>$extra</p>
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45 </body>
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46 </html>]];
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47 html = html:gsub("%s%s+", "");
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48
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49 local entities = {
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50 ["<"] = "&lt;", [">"] = "&gt;", ["&"] = "&amp;",
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51 ["'"] = "&apos;", ["\""] = "&quot;", ["\n"] = "<br/>",
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52 };
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53
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54 local function tohtml(plain)
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55 return (plain:gsub("[<>&'\"\n]", entities));
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56
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57 end
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58
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59 local function get_page(code, extra)
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60 local message = messages[code];
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61 if always_serve or message then
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62 message = message or default_message;
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63 return (html:gsub("$(%a+)", {
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64 title = rawget(codes, code) or ("Code "..tostring(code));
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65 message = message[1]:gsub("%%", function ()
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66 return message[math.random(2, math.max(#message,2))];
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67 end);
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68 extra = tohtml(extra or "");
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69 }));
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70 end
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71 end
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72
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73 module:hook_object_event(server, "http-error", function (event)
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74 return get_page(event.code, (show_private and event.private_message) or event.message);
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75 end);