prosody
b773b15fee71
plugins/mod_http_errors.lua

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plugins/mod_http_errors.lua @ 8721:b773b15fee71

util.startup: Set up event hooks for reloading logging here instead of in loggingmanager to simplify startup dependencies
author Kim Alvefur <zash@zash.se>
date Thu, 05 Apr 2018 17:53:51 +0200
parent 8364:f91ab40a3105
child 9760:88640b3ea6b8
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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 local xml_escape = require "util.stanza".xml_escape;
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6 local render = require "util.interpolation".new("%b{}", xml_escape);
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7
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8 local show_private = module:get_option_boolean("http_errors_detailed", false);
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9 local always_serve = module:get_option_boolean("http_errors_always_show", true);
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10 local default_message = { module:get_option_string("http_errors_default_message", "That's all I know.") };
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11 local default_messages = {
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12 [400] = { "What kind of request do you call that??" };
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13 [403] = { "You're not allowed to do that." };
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14 [404] = { "Whatever you were looking for is not here. %";
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15 "Where did you put it?", "It's behind you.", "Keep looking." };
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16 [500] = { "% Check your error log for more info.";
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17 "Gremlins.", "It broke.", "Don't look at me." };
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18 };
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19
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20 local messages = setmetatable(module:get_option("http_errors_messages", {}), { __index = default_messages });
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21
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22 local html = [[
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23 <!DOCTYPE html>
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24 <html>
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25 <head>
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26 <meta charset="utf-8">
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27 <title>{title}</title>
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28 <style>
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29 body{
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30 margin-top:14%;
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31 text-align:center;
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32 background-color:#F8F8F8;
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33 font-family:sans-serif;
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34 }
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35 h1{
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36 font-size:xx-large;
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37 }
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38 p{
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39 font-size:x-large;
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40 }
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41 p+p {
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42 font-size:large;
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43 font-family:courier;
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44 }
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45 </style>
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46 </head>
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47 <body>
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48 <h1>{title}</h1>
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49 <p>{message}</p>
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50 <p>{extra?}</p>
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51 </body>
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52 </html>
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53 ]];
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54
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55 local function get_page(code, extra)
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56 local message = messages[code];
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57 if always_serve or message then
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58 message = message or default_message;
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59 return render(html, {
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60 title = rawget(codes, code) or ("Code "..tostring(code));
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61 message = message[1]:gsub("%%", function ()
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62 return message[math.random(2, math.max(#message,2))];
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63 end);
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64 extra = extra;
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65 });
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66 end
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67 end
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68
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69 module:hook_object_event(server, "http-error", function (event)
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70 if event.response then
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71 event.response.headers.content_type = "text/html; charset=utf-8";
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72 end
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73 return get_page(event.code, (show_private and event.private_message) or event.message);
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74 end);