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annotate plugins/mod_http_errors.lua @ 14226:59c50c76860b

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util.prosodyctl.check: Show TLSA records in DNS Doesn't yet check that these match your certificates, but can be compared to 'check certs'
author Kim Alvefur <zash@zash.se>
date Fri, 12 Jun 2026 23:08:09 +0200
parents 36d361722889
children
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1 module:set_global();
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2
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3 local server = require "prosody.net.http.server";
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4 local codes = require "prosody.net.http.codes";
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5 local http_errors = require "prosody.net.http.errors".registry;
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6 local json = require "prosody.util.json";
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7 local new_short_id = require "prosody.util.id".short;
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8 local xml_escape = require "prosody.util.stanza".xml_escape;
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9 local render = require "prosody.util.interpolation".new("%b{}", xml_escape);
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10
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11
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12 local show_private = module:get_option_boolean("http_errors_detailed", false);
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13 local always_serve = module:get_option_boolean("http_errors_always_show", true);
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14 local default_message = { module:get_option_string("http_errors_default_message", "That's all I know.") };
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15 local default_messages = {
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16 [400] = { "What kind of request do you call that??" };
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17 [403] = { "You're not allowed to do that." };
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18 [404] = { "Whatever you were looking for is not here. %";
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19 "Where did you put it?", "It's behind you.", "Keep looking." };
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20 [500] = { "% Check your error log for more info.";
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21 "Gremlins.", "It broke.", "Don't look at me." };
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22 ["/"] = {
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23 "A study in simplicity.";
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24 "Better catch it!";
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25 "Don't just stand there, go after it!";
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26 "Well, say something, before it runs too far!";
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27 "Welcome to the world of XMPP!";
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28 "You can do anything in XMPP!"; -- "The only limit is XML.";
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29 "You can do anything with Prosody!"; -- the only limit is memory?
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30 };
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31 };
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32
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33 local messages = setmetatable(module:get_option("http_errors_messages", {}), { __index = default_messages });
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34
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35 local html = [[
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36 <!DOCTYPE html>
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37 <html>
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38 <head>
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39 <meta charset="utf-8">
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40 <title>{title}</title>
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41 <style>
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42 :root{color-scheme:light dark}
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43 body{margin-top:14%;text-align:center;font-family:sans-serif}
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44 h1{font-size:xx-large}
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45 p{font-size:x-large}
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46 p.warning>span{font-size:large;background-color:yellow}
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47 p.extra{font-size:large;font-family:courier}
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48 @media(prefers-color-scheme:dark){
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49 p.warning>span{background-color:inherit;color:yellow}
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50 }
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51 </style>
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52 </head>
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53 <body>
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54 <h1>{icon?{icon_raw!?}} {title}</h1>
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55 <p>{message}</p>
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56 {warning&<p class="warning"><span>&#9888; {warning?} &#9888;</span></p>}
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57 {extra&<p class="extra">{extra?}</p>}
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58 </body>
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59 </html>
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60 ]];
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61
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62 local function get_page(code, extra)
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63 local message = messages[code];
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64 if always_serve or message then
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65 message = message or default_message;
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66 return render(html, {
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67 title = rawget(codes, code) or ("Code "..tostring(code));
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68 message = message[1]:gsub("%%", function ()
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69 return message[math.random(2, math.max(#message,2))];
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70 end);
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71 extra = extra;
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72 });
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73 end
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74 end
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75
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76 -- Main error page handler
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77 module:hook_object_event(server, "http-error", function (event)
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78 if event.response then
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79 event.response.headers.content_type = "text/html; charset=utf-8";
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80 end
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81 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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82 end);
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83
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84 -- Return error object as JSON if that's what requester prefers
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85 module:hook_object_event(server, "http-error", function (event)
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86 if event.request and (event.request.headers.accept or ""):match("^application/json") then
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87 event.response.headers.content_type = "application/json";
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88 local error = event.request and event.error;
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89 if not error then
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90 error = http_errors[event.response.status_code];
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91 end
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92 local extra = error.extra;
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93 return json.encode({
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94 instance_id = error.instance_id or new_short_id();
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95 type = error.type;
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96 condition = error.condition;
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97 text = error.text or (show_private and event.private_message) or event.message;
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98 namespace = extra and extra.namespace;
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99 subcondition = extra and extra.condition;
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100 source = error.source or "mod_http_errors";
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101 });
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102 end
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103 end, 0.1);
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104
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105 -- Way to use the template for other things so to give a consistent appearance
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106 module:hook("http-message", function (event)
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107 if event.response then
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108 event.response.headers.content_type = "text/html; charset=utf-8";
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109 end
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110 return render(html, event);
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111 end, -1);
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112
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113 local icon = [[
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114 <svg xmlns="http://www.w3.org/2000/svg" height="0.7em" viewBox="0 0 480 480" width="0.7em">
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115 <rect fill="#6197df" height="220" rx="60" ry="60" width="220" x="10" y="10"></rect>
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116 <rect fill="#f29b00" height="220" rx="60" ry="60" width="220" x="10" y="240"></rect>
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117 <rect fill="#f29b00" height="220" rx="60" ry="60" width="220" x="240" y="10"></rect>
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118 <rect fill="#6197df" height="220" rx="60" ry="60" width="220" x="240" y="240"></rect>
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119 </svg>
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120 ]];
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121
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122 -- Something nicer shown instead of 404 at the root path, if nothing else handles this path
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123 module:hook_object_event(server, "http-error", function (event)
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124 local request, response = event.request, event.response;
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125 if request and response and request.path == "/" and response.status_code == 404 then
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126 response.status_code = 200;
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127 response.headers.content_type = "text/html; charset=utf-8";
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128 local message = messages["/"];
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129 return render(html, {
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130 icon_raw = icon,
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parents: 9760
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131 title = "Prosody is running!";
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132 message = message[math.random(#message)];
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parents: 9760
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133 });
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parents: 9760
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134 end
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parents: 9760
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135 end, 1);
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parents: 9760
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136