prosody
46dd9df2db0c
plugins/mod_http_errors.lua

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plugins/mod_http_errors.lua @ 10430:46dd9df2db0c

mod_http_errors: Show a friendly page instead of 404 on top level
author Kim Alvefur <zash@zash.se>
date Sun, 17 Nov 2019 16:16:53 +0100
parent 9760:88640b3ea6b8
child 10574:f70c874b7936
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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
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36 h1 {
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37 font-size : xx-large
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38 }
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39
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40 p {
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41 font-size : x-large
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42 }
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43
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44 p+p {
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45 font-size : large;
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46 font-family : courier
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47 }
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48 </style>
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49 </head>
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50 <body>
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51 <h1>{title}</h1>
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52 <p>{message}</p>
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53 <p>{extra?}</p>
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54 </body>
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55 </html>
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56 ]];
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57
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58 local function get_page(code, extra)
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59 local message = messages[code];
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60 if always_serve or message then
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61 message = message or default_message;
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62 return render(html, {
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63 title = rawget(codes, code) or ("Code "..tostring(code));
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64 message = message[1]:gsub("%%", function ()
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65 return message[math.random(2, math.max(#message,2))];
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66 end);
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67 extra = extra;
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68 });
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69 end
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70 end
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71
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72 module:hook_object_event(server, "http-error", function (event)
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73 if event.response then
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74 event.response.headers.content_type = "text/html; charset=utf-8";
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75 end
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76 return get_page(event.code, (show_private and event.private_message) or event.message);
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77 end);
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78
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79 module:hook_object_event(server, "http-error", function (event)
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80 local request, response = event.request, event.response;
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81 if request and response and request.path == "/" and response.status_code == 404 then
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82 response.headers.content_type = "text/html; charset=utf-8";
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83 return render(html, {
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84 title = "Prosody is running!";
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85 message = "Welcome to the XMPP world!";
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86 });
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87 end
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88 end, 1);
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89