annotate mod_invites_page/mod_invites_page.lua @ 5243:d5dc8edb2695

mod_http_oauth2: Use more compact IDs UUIDs are nice but so verbose! The reduction in entropy for the nonce should be fine since the timestamp is also counts towards this, and it changes every second (modulo clock shenanigans), so the chances of someone managing to get the same client_secret by registering with the same information at the same time as another entity should be negligible.
author Kim Alvefur <zash@zash.se>
date Sat, 11 Mar 2023 22:46:27 +0100
parents 75b6e5df65f9
children efdaffc878a9
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1 local st = require "util.stanza";
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2 local url_escape = require "util.http".urlencode;
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3
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4 local base_url = "https://"..module.host.."/";
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5
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6 local render_html_template = require"util.interpolation".new("%b{}", st.xml_escape, {
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7 urlescape = url_escape;
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8 lower = string.lower;
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9 classname = function (s) return (s:gsub("%W+", "-")); end;
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10 relurl = function (s)
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11 if s:match("^%w+://") then
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12 return s;
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13 end
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14 return base_url.."/"..s;
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15 end;
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16 });
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17 local render_url = require "util.interpolation".new("%b{}", url_escape, {
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18 urlescape = url_escape;
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19 noscheme = function (url)
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20 return (url:gsub("^[^:]+:", ""));
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21 end;
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22 });
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23
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24 local site_name = module:get_option_string("site_name", module.host);
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25 local site_apps;
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26
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27 -- Enable/disable built-in invite pages
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28 local external_only = module:get_option_boolean("invites_page_external", false);
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29
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30 local http_files;
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32 if not external_only then
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33 -- Load HTTP-serving dependencies
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34 if prosody.shutdown then -- not if running under prosodyctl
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35 module:depends("http");
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36
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37 if prosody.process_type == "prosody" then
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38 http_files = require "net.http.files";
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39 else
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40 http_files = module:depends"http_files";
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41 end
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42 end
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43 -- Calculate automatic base_url default
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44 base_url = module.http_url and module:http_url();
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45
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46 -- Load site apps info
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47 module:depends("register_apps");
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48 site_apps = module:shared("register_apps/apps");
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49 end
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50
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51 local invites = module:depends("invites");
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52
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53 -- Point at eg https://github.com/ge0rg/easy-xmpp-invitation
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54 -- This URL must always be absolute, as it is shared standalone
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55 local invite_url_template = module:get_option_string("invites_page", base_url and (base_url.."?{invite.token}") or nil);
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56 -- This URL is relative to the invite page, or can be absolute
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57 local register_url_template = module:get_option_string("invites_registration_page", "register?t={invite.token}&c={app.id}");
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58
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59 local function add_landing_url(invite)
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60 if not invite_url_template then return; end
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61 -- TODO: we don't currently have a landing page for subscription-only invites,
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62 -- so the user will only receive a URI. The client should be able to handle this
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63 -- by automatically falling back to a client-specific landing page, per XEP-0401.
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64 if not invite.allow_registration then return; end
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65 invite.landing_page = render_url(invite_url_template, { host = module.host, invite = invite });
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66 end
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67
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68 module:hook("invite-created", add_landing_url);
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69
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70 if external_only then
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71 return;
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72 end
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73
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74 local function render_app_urls(apps, invite_vars)
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75 local rendered_apps = {};
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76 for _, unrendered_app in ipairs(apps) do
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77 local app = setmetatable({}, { __index = unrendered_app });
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78 local template_vars = { app = app, invite = invite_vars, base_url = base_url };
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79 if app.magic_link_format then
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80 -- Magic link generally links directly to third-party
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81 app.proceed_url = render_url(app.magic_link_format or app.link or "#", template_vars);
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82 elseif app.supports_preauth_uri then
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83 -- Proceed to a page that guides the user to download, and then
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84 -- click the URI button
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85 app.proceed_url = render_url("{base_url!}/setup/{app.id}?{invite.token}", template_vars);
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86 else
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87 -- Manual means proceed to web registration, but include app id
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88 -- so it can show post-registration instructions
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89 app.proceed_url = render_url(register_url_template, template_vars);
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90 end
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91 table.insert(rendered_apps, app);
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92 end
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93 return rendered_apps;
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94 end
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95
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96 function serve_invite_page(event)
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97 local invite_page_template = assert(module:load_resource("html/invite.html")):read("*a");
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98 local invalid_invite_page_template = assert(module:load_resource("html/invite_invalid.html")):read("*a");
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99
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100 event.response.headers["Content-Type"] = "text/html; charset=utf-8";
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101
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102 local invite = invites.get(event.request.url.query);
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103 if not invite then
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104 return render_html_template(invalid_invite_page_template, {
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105 site_name = site_name;
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106 static = base_url.."/static";
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107 });
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108 end
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109
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110 local template_vars = {
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111 site_name = site_name;
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112 token = invite.token;
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113 uri = invite.uri;
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114 type = invite.type;
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115 jid = invite.jid;
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116 inviter = invite.inviter;
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117 static = base_url.."/static";
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118 };
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119 template_vars.apps = render_app_urls(site_apps, template_vars);
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120
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121 local invite_page = render_html_template(invite_page_template, template_vars);
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122
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123 event.response.headers["Link"] = ([[<%s>; rel="alternate"]]):format(template_vars.uri);
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124 return invite_page;
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125 end
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126
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127 function serve_setup_page(event, app_id)
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128 local invite_page_template = assert(module:load_resource("html/client.html")):read("*a");
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129 local invalid_invite_page_template = assert(module:load_resource("html/invite_invalid.html")):read("*a");
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130
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131 event.response.headers["Content-Type"] = "text/html; charset=utf-8";
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132
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133 local invite = invites.get(event.request.url.query);
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134 if not invite then
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135 return render_html_template(invalid_invite_page_template, {
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136 site_name = site_name;
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137 static = base_url.."/static";
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138 });
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139 end
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140
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141 local template_vars = {
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142 site_name = site_name;
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143 apps = site_apps;
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144 token = invite.token;
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145 uri = invite.uri;
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146 type = invite.type;
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147 jid = invite.jid;
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148 static = base_url.."/static";
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149 };
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150 template_vars.app = render_app_urls({ site_apps[app_id] }, template_vars)[1];
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151
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152 local invite_page = render_html_template(invite_page_template, template_vars);
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153 return invite_page;
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154 end
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155
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156 local mime_map = {
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157 png = "image/png";
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158 svg = "image/svg+xml";
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159 js = "application/javascript";
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160 };
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161
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162 module:provides("http", {
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163 route = {
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164 ["GET"] = serve_invite_page;
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165 ["GET /setup/*"] = serve_setup_page;
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166 ["GET /static/*"] = http_files and http_files.serve({ path = module:get_directory().."/static", mime_map = mime_map });
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167 };
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168 });