mod_pubsub_serverinfo: Don't default to non-local pubsub servers (thanks roughnecks)
local st = require "util.stanza";
module:depends("http");
local uuid_new = require "util.uuid".generate;
local os_time = os.time;
local t_remove = table.remove;
local add_task = require "util.timer".add_task;
local jid_bare = require "util.jid".bare;
local function get_room_from_jid() end;
local is_component = module:get_host_type() == "component";
if is_component then
local mod_muc = module:depends "muc";
local muc_rooms = rawget(mod_muc, "rooms");
get_room_from_jid = rawget(mod_muc, "get_room_from_jid") or
function (jid)
return muc_rooms[jid];
end
end
local utf8_pattern = "[\194-\244][\128-\191]*$";
local function drop_invalid_utf8(seq)
local start = seq:byte();
module:log("debug", "utf8: %d, %d", start, #seq);
if (start <= 223 and #seq < 2)
or (start >= 224 and start <= 239 and #seq < 3)
or (start >= 240 and start <= 244 and #seq < 4)
or (start > 244) then
return "";
end
return seq;
end
local function utf8_length(str)
local _, count = string.gsub(str, "[^\128-\193]", "");
return count;
end
local pastebin_private_messages = module:get_option_boolean("pastebin_private_messages", not is_component);
local length_threshold = module:get_option_number("pastebin_threshold", 500);
local line_threshold = module:get_option_number("pastebin_line_threshold", 4);
local max_summary_length = module:get_option_number("pastebin_summary_length", 150);
local html_preview = module:get_option_boolean("pastebin_html_preview", true);
local base_url = module:get_option_string("pastebin_url", module:http_url()):gsub("/$", "").."/";
-- Seconds a paste should live for in seconds (config is in hours), default 24 hours
local expire_after = math.floor(module:get_option_number("pastebin_expire_after", 24) * 3600);
local trigger_string = module:get_option_string("pastebin_trigger");
trigger_string = (trigger_string and trigger_string .. " ");
local pastes = {};
local xmlns_xhtmlim = "http://jabber.org/protocol/xhtml-im";
local xmlns_xhtml = "http://www.w3.org/1999/xhtml";
function pastebin_text(text)
local uuid = uuid_new();
pastes[uuid] = { body = text, time = os_time(), };
pastes[#pastes+1] = uuid;
if not pastes[2] then -- No other pastes, give the timer a kick
add_task(expire_after, expire_pastes);
end
return base_url..uuid;
end
function handle_request(event, pasteid)
event.response.headers.content_type = "text/plain; charset=utf-8";
if not pasteid then
return "Invalid paste id, perhaps it expired?";
end
--module:log("debug", "Received request, replying: %s", pastes[pasteid].text);
local paste = pastes[pasteid];
if not paste then
return "Invalid paste id, perhaps it expired?";
end
return paste.body;
end
local function replace_tag(s, replacement)
local once = false;
s:maptags(function (tag)
if tag.name == replacement.name and tag.attr.xmlns == replacement.attr.xmlns then
if not once then
once = true;
return replacement;
else
return nil;
end
end
return tag;
end);
if not once then
s:add_child(replacement);
end
end
function check_message(data)
local stanza = data.stanza;
-- Only check for MUC presence when loaded on a component.
if is_component then
local room = get_room_from_jid(jid_bare(stanza.attr.to));
if not room then return; end
local nick = room._jid_nick[stanza.attr.from];
if not nick then return; end
end
local body = stanza:get_child_text("body");
if not body then return; end
--module:log("debug", "Body(%s) length: %d", type(body), #(body or ""));
if ( #body > length_threshold and utf8_length(body) > length_threshold ) or
(trigger_string and body:find(trigger_string, 1, true) == 1) or
(select(2, body:gsub("\n", "%0")) >= line_threshold)
then
if trigger_string and body:sub(1, #trigger_string) == trigger_string then
body = body:sub(#trigger_string+1);
end
local url = pastebin_text(body);
module:log("debug", "Pasted message as %s", url);
--module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex]));
local summary = (body:sub(1, max_summary_length):gsub(utf8_pattern, drop_invalid_utf8) or ""):match("[^\n]+") or "";
summary = summary:match("^%s*(.-)%s*$");
local summary_prefixed = summary:match("[,:]$");
replace_tag(stanza, st.stanza("body"):text(summary .. "\n" .. url));
stanza:add_child(st.stanza("query", { xmlns = "jabber:iq:oob" }):tag("url"):text(url));
if html_preview then
local line_count = select(2, body:gsub("\n", "%0")) + 1;
local link_text = ("[view %spaste (%d line%s)]"):format(summary_prefixed and "" or "rest of ", line_count, line_count == 1 and "" or "s");
local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml });
html:tag("p"):text(summary.." "):up();
html:tag("a", { href = url }):text(link_text):up();
replace_tag(stanza, html);
end
end
end
module:hook("message/bare", check_message);
if pastebin_private_messages then
module:hook("message/full", check_message);
end
module:hook("muc-disco#info", function (event)
local reply, form, formdata = event.reply, event.form, event.formdata;
reply:tag("feature", { var = "https://modules.prosody.im/mod_pastebin" }):up();
table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_lines", datatype = "xs:integer" });
table.insert(form, { name = "{https://modules.prosody.im/mod_pastebin}max_characters", datatype = "xs:integer" });
formdata["{https://modules.prosody.im/mod_pastebin}max_lines"] = tostring(line_threshold);
formdata["{https://modules.prosody.im/mod_pastebin}max_characters"] = tostring(length_threshold);
end);
function expire_pastes(time)
time = time or os_time(); -- COMPAT with 0.5
if pastes[1] then
pastes[pastes[1]] = nil;
t_remove(pastes, 1);
if pastes[1] then
return (expire_after - (time - pastes[pastes[1]].time)) + 1;
end
end
end
module:provides("http", {
route = {
["GET /*"] = handle_request;
};
});
local function set_pastes_metatable()
-- luacheck: ignore 212/pastes 431/pastes
if expire_after == 0 then
local dm = require "util.datamanager";
setmetatable(pastes, {
__index = function (pastes, id)
if type(id) == "string" then
return dm.load(id, module.host, "pastebin");
end
end;
__newindex = function (pastes, id, data)
if type(id) == "string" then
dm.store(id, module.host, "pastebin", data);
end
end;
});
else
setmetatable(pastes, nil);
end
end
module.load = set_pastes_metatable;
function module.save()
return { pastes = pastes };
end
function module.restore(data)
pastes = data.pastes or pastes;
set_pastes_metatable();
end