mod_pastebin: Optionally bin if message starts with a configurable trigger string
local st = require "util.stanza";
local httpserver = require "net.httpserver";
local uuid_new = require "util.uuid".generate;
local os_time = os.time;
local t_insert, t_remove = table.insert, table.remove;
local add_task = require "util.timer".add_task;
local length_threshold = config.get(module.host, "core", "pastebin_threshold") or 500;
local base_url = config.get(module.host, "core", "pastebin_url");
-- Seconds a paste should live for in seconds (config is in hours), default 24 hours
local expire_after = math.floor((config.get(module.host, "core", "pastebin_expire_after") or 24) * 3600);
local trigger_string = config.get(module.host, "core", "pastebin_trigger");
trigger_string = (trigger_string and trigger_string .. " ") or "";
local pastes = {};
local default_headers = { ["Content-Type"] = "text/plain; charset=utf-8" };
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(), headers = default_headers };
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(method, body, request)
local pasteid = request.url.path:match("[^/]+$");
if not pasteid or not pastes[pasteid] then
return "Invalid paste id, perhaps it expired?";
end
--module:log("debug", "Received request, replying: %s", pastes[pasteid].text);
return pastes[pasteid];
end
function check_message(data)
local origin, stanza = data.origin, data.stanza;
local body, bodyindex, htmlindex;
for k,v in ipairs(stanza) do
if v.name == "body" then
body, bodyindex = v, k;
elseif v.name == "html" and v.attr.xmlns == xmlns_xhtmlim then
htmlindex = k;
end
end
if not body then return; end
body = body:get_text();
--module:log("debug", "Body(%s) length: %d", type(body), #(body or ""));
if body and ((#body > length_threshold) or (body:find(trigger_string, 1, true) == 1)) then
body = body:gsub("^" .. trigger_string, "", 1);
local url = pastebin_text(body);
module:log("debug", "Pasted message as %s", url);
--module:log("debug", " stanza[bodyindex] = %q", tostring( stanza[bodyindex]));
stanza[bodyindex][1] = url;
local html = st.stanza("html", { xmlns = xmlns_xhtmlim }):tag("body", { xmlns = xmlns_xhtml });
html:tag("p"):text(body:sub(1,150)):up();
html:tag("a", { href = url }):text("[...]"):up();
stanza[htmlindex or #stanza+1] = html;
end
end
module:hook("message/bare", check_message);
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
local ports = config.get(module.host, "core", "pastebin_ports") or { 5280 };
for _, options in ipairs(ports) do
local port, base, ssl, interface = 5280, "pastebin", false, nil;
if type(options) == "number" then
port = options;
elseif type(options) == "table" then
port, base, ssl, interface = options.port or 5280, options.path or "pastebin", options.ssl or false, options.interface;
elseif type(options) == "string" then
base = options;
end
base_url = base_url or ("http://"..module:get_host()..(port ~= 80 and (":"..port) or "").."/"..base.."/");
httpserver.new{ port = port, base = base, handler = handle_request, ssl = ssl }
end