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annotate mod_invites_page/mod_invites_page.lua @ 4975:733e5513f691

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various: Use 0.12+ API for serving files from the file system over HTTP Using mod_http_files this way is deprecated. Having the base behavior in a separate module makes it easier to have a specialized module with coherent behavior that does not do things when not explicitly enabled.
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 13:58:27 +0200
parents 2c47b8110c48
children 75b6e5df65f9
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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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31
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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 if not pcall(function ()
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37 http_files = require "net.http.files";
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38 end) then
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39 http_files = module:depends"http_files";
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40 end
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41 end
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42 -- Calculate automatic base_url default
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43 base_url = module.http_url and module:http_url();
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44
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45 -- Load site apps info
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46 module:depends("register_apps");
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47 site_apps = module:shared("register_apps/apps");
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48 end
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49
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50 local invites = module:depends("invites");
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51
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52 -- Point at eg https://github.com/ge0rg/easy-xmpp-invitation
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53 -- This URL must always be absolute, as it is shared standalone
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54 local invite_url_template = module:get_option_string("invites_page", base_url and (base_url.."?{invite.token}") or nil);
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55 -- This URL is relative to the invite page, or can be absolute
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56 local register_url_template = module:get_option_string("invites_registration_page", "register?t={invite.token}&c={app.id}");
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57
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58 local function add_landing_url(invite)
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59 if not invite_url_template then return; end
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60 -- TODO: we don't currently have a landing page for subscription-only invites,
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61 -- so the user will only receive a URI. The client should be able to handle this
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62 -- by automatically falling back to a client-specific landing page, per XEP-0401.
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63 if not invite.allow_registration then return; end
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64 invite.landing_page = render_url(invite_url_template, { host = module.host, invite = invite });
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65 end
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66
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67 module:hook("invite-created", add_landing_url);
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68
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69 if external_only then
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70 return;
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71 end
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72
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73 local function render_app_urls(apps, invite_vars)
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74 local rendered_apps = {};
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75 for _, unrendered_app in ipairs(apps) do
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76 local app = setmetatable({}, { __index = unrendered_app });
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77 local template_vars = { app = app, invite = invite_vars, base_url = base_url };
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78 if app.magic_link_format then
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79 -- Magic link generally links directly to third-party
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80 app.proceed_url = render_url(app.magic_link_format or app.link or "#", template_vars);
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81 elseif app.supports_preauth_uri then
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82 -- Proceed to a page that guides the user to download, and then
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83 -- click the URI button
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84 app.proceed_url = render_url("{base_url!}/setup/{app.id}?{invite.token}", template_vars);
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85 else
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86 -- Manual means proceed to web registration, but include app id
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87 -- so it can show post-registration instructions
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88 app.proceed_url = render_url(register_url_template, template_vars);
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89 end
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90 table.insert(rendered_apps, app);
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91 end
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92 return rendered_apps;
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93 end
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94
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95 function serve_invite_page(event)
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96 local invite_page_template = assert(module:load_resource("html/invite.html")):read("*a");
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97 local invalid_invite_page_template = assert(module:load_resource("html/invite_invalid.html")):read("*a");
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98
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99 event.response.headers["Content-Type"] = "text/html; charset=utf-8";
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100
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101 local invite = invites.get(event.request.url.query);
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102 if not invite then
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103 return render_html_template(invalid_invite_page_template, {
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104 site_name = site_name;
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105 static = base_url.."/static";
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106 });
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107 end
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108
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109 local template_vars = {
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110 site_name = site_name;
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111 token = invite.token;
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112 uri = invite.uri;
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113 type = invite.type;
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114 jid = invite.jid;
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115 inviter = invite.inviter;
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116 static = base_url.."/static";
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117 };
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118 template_vars.apps = render_app_urls(site_apps, template_vars);
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119
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120 local invite_page = render_html_template(invite_page_template, template_vars);
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121
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122 event.response.headers["Link"] = ([[<%s>; rel="alternate"]]):format(template_vars.uri);
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123 return invite_page;
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124 end
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125
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126 function serve_setup_page(event, app_id)
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127 local invite_page_template = assert(module:load_resource("html/client.html")):read("*a");
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128 local invalid_invite_page_template = assert(module:load_resource("html/invite_invalid.html")):read("*a");
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129
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130 event.response.headers["Content-Type"] = "text/html; charset=utf-8";
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131
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132 local invite = invites.get(event.request.url.query);
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133 if not invite then
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134 return render_html_template(invalid_invite_page_template, {
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135 site_name = site_name;
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136 static = base_url.."/static";
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137 });
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138 end
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139
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140 local template_vars = {
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141 site_name = site_name;
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142 apps = site_apps;
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143 token = invite.token;
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144 uri = invite.uri;
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145 type = invite.type;
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146 jid = invite.jid;
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147 static = base_url.."/static";
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148 };
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149 template_vars.app = render_app_urls({ site_apps[app_id] }, template_vars)[1];
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150
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151 local invite_page = render_html_template(invite_page_template, template_vars);
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152 return invite_page;
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153 end
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154
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155 local mime_map = {
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156 png = "image/png";
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157 svg = "image/svg+xml";
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158 js = "application/javascript";
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159 };
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160
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161 module:provides("http", {
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162 route = {
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163 ["GET"] = serve_invite_page;
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164 ["GET /setup/*"] = serve_setup_page;
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165 ["GET /static/*"] = http_files and http_files.serve({ path = module:get_directory().."/static", mime_map = mime_map });
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166 };
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167 });