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mod_ogp/mod_ogp.lua @ 5738:8488ebde5739
mod_http_oauth2: Skip consent screen if requested by client and same scopes already granted
This follows the intent behind the OpenID Connect 'prompt' parameter
when it does not include the 'consent' keyword, that is the client
wishes to skip the consent screen. If the user has already granted the
exact same scopes to the exact same client in the past, then one can
assume that they may grant it again.
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 14 Nov 2023 23:03:37 +0100 |
parent | 4598:09f0911c735d |
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local mod_muc = module:depends("muc") local http = require "net.http" local st = require "util.stanza" local url_pattern = [[https?://%S+]] local domain_pattern = '^%w+://([^/]+)' local xmlns_fasten = "urn:xmpp:fasten:0" local xmlns_xhtml = "http://www.w3.org/1999/xhtml" local allowlist = module:get_option_set("ogp_domain_allowlist", module:get_option_set("ogp_domain_whitelist", {})) local denylist = module:get_option_set("ogp_domain_denylist", {}) local function is_allowed(domain) if allowlist:empty() then return true end if allowlist:contains(domain) then return true end return false end local function is_denied(domain) if denylist:empty() then return false end if denylist:contains(domain) then return true end return false end local function fetch_ogp_data(room, url, origin_id) if not url then return; end local domain = url:match(domain_pattern); if is_denied(domain) or not is_allowed(domain) then return; end http.request( url, nil, function(response_body, response_code, _) if response_code ~= 200 then module:log("debug", "Call to %s returned code %s and body %s", url, response_code, response_body) return end local to = room.jid local from = room and room.jid or module.host local fastening = st.message({to = to, from = from, type = 'groupchat'}):tag("apply-to", {xmlns = xmlns_fasten, id = origin_id}) local found_metadata = false local message_body = "" local meta_pattern = [[<meta (.-)/?>]] for match in response_body:gmatch(meta_pattern) do local property = match:match([[property=%s*["']?(og:.-)["']?%s]]) if not property then property = match:match([[property=["']?(og:.-)["']$]]) end local content = match:match([[content=%s*["'](.-)["']%s]]) if not content then content = match:match([[content=["']?(.-)["']$]]) end if not content then content = match:match([[content=(.-) property]]) end if not content then content = match:match([[content=(.-)$]]) end if property and content then module:log("debug", property .. "\t" .. content) fastening:tag( "meta", { xmlns = xmlns_xhtml, property = property, content = content } ):up() found_metadata = true message_body = message_body .. property .. "\t" .. content .. "\n" end end if found_metadata then mod_muc.get_room_from_jid(room.jid):broadcast_message(fastening) end module:log("debug", tostring(fastening)) end ) end local function ogp_handler(event) local room, stanza = event.room, st.clone(event.stanza) local body = stanza:get_child_text("body") if not body then return; end local origin_id = stanza:find("{urn:xmpp:sid:0}origin-id@id") if not origin_id then return; end for url in body:gmatch(url_pattern) do fetch_ogp_data(room, url, origin_id); end end module:hook("muc-occupant-groupchat", ogp_handler) module:hook("muc-message-is-historic", function (event) local fastening = event.stanza:get_child('apply-to', xmlns_fasten) if fastening and fastening:get_child('meta', xmlns_xhtml) then return true end end);