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annotate plugins/mod_http_errors.lua @ 14016:1df1782ccdfe

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prosodyctl shell: Improve process exit codes This fixes a bug introduced in 3326c8a29a86 where prosodyctl shell would always exit with non-zero error codes, even on success. Now it will exit with 0 for success, or 1 if any errors were printed. It also updates the other exit codes in the shell command to help distinguish between different error cases. These are based on the sysexits.h codes, although it is not recommended to rely on that interface.
author Matthew Wild <mwild1@gmail.com>
date Fri, 19 Dec 2025 15:32:26 +0000
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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Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
123 module:hook_object_event(server, "http-error", function (event)
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
124 local request, response = event.request, event.response;
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
125 if request and response and request.path == "/" and response.status_code == 404 then
11664
d83f8f44caea mod_http_errors: Set status code 200 from root page
Kim Alvefur <zash@zash.se>
parents: 11663
diff changeset
126 response.status_code = 200;
10430
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
127 response.headers.content_type = "text/html; charset=utf-8";
11403
747e8245f180 mod_http_errors: Add some silly variations for the '/' page
Kim Alvefur <zash@zash.se>
parents: 11395
diff changeset
128 local message = messages["/"];
10430
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Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
129 return render(html, {
11663
04fa947784bc mod_http_errors: Add a Prosody logo to root page
Kim Alvefur <zash@zash.se>
parents: 11662
diff changeset
130 icon_raw = icon,
10430
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
131 title = "Prosody is running!";
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747e8245f180 mod_http_errors: Add some silly variations for the '/' page
Kim Alvefur <zash@zash.se>
parents: 11395
diff changeset
132 message = message[math.random(#message)];
10430
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
133 });
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
134 end
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
135 end, 1);
46dd9df2db0c mod_http_errors: Show a friendly page instead of 404 on top level
Kim Alvefur <zash@zash.se>
parents: 9760
diff changeset
136