prosody
29e7ed75ed3f
plugins/mod_http_errors.lua

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plugins/mod_http_errors.lua @ 11389:29e7ed75ed3f

mod_http_errors: Add way to reuse the error page template module:fire_event("http-message", {title = "hello"; message = "world"}) Goal is to enable consistent messages from Prosody. Not necessarily error messages, but warnings or just notices. This does cause some drift in the purpose of mod_http_errors, but that's okay.
author Kim Alvefur <zash@zash.se>
date Sun, 21 Feb 2021 06:13:19 +0100
parent 11388:60a61c509d87
child 11390:226fd5d3a295
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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{margin-top:14%;text-align:center;background-color:#f8f8f8;font-family:sans-serif}
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30 h1{font-size:xx-large}
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31 p{font-size:x-large}
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32 p.extra{font-size:large;font-family:courier}
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33 @media(prefers-color-scheme:dark){
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34 body{background-color:#161616;color:#eee}
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35 }
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36 </style>
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37 </head>
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38 <body>
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39 <h1>{title}</h1>
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40 <p>{message}</p>
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41 {extra&<p class="extra">{extra?}</p>}
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42 </body>
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43 </html>
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44 ]];
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45
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46 local function get_page(code, extra)
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47 local message = messages[code];
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48 if always_serve or message then
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49 message = message or default_message;
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50 return render(html, {
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51 title = rawget(codes, code) or ("Code "..tostring(code));
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52 message = message[1]:gsub("%%", function ()
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53 return message[math.random(2, math.max(#message,2))];
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54 end);
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55 extra = extra;
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56 });
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57 end
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58 end
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59
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60 module:hook_object_event(server, "http-error", function (event)
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61 if event.response then
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62 event.response.headers.content_type = "text/html; charset=utf-8";
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63 end
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64 return get_page(event.code, (show_private and event.private_message) or event.message or (event.error and event.error.text));
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65 end);
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66
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67 module:hook("http-message", function (event)
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68 if event.response then
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69 event.response.headers.content_type = "text/html; charset=utf-8";
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70 end
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71 return render(html, event);
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72 end);
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73
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74 module:hook_object_event(server, "http-error", function (event)
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75 local request, response = event.request, event.response;
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76 if request and response and request.path == "/" and response.status_code == 404 then
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77 response.headers.content_type = "text/html; charset=utf-8";
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78 return render(html, {
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79 title = "Prosody is running!";
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80 message = "Welcome to the XMPP world!";
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81 });
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82 end
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83 end, 1);
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84