mod_pep: Wipe pubsub service on user deletion
Data is already wiped from storage, but this ensures everything is
properly unsubscribed, possibly with notifications etc.
Clears recipient cache as well, since it is no longer relevant.
local server = require "net.server";
local log = require "util.logger".init("net.connect");
local new_id = require "util.id".short;
local pending_connection_methods = {};
local pending_connection_mt = {
__name = "pending_connection";
__index = pending_connection_methods;
__tostring = function (p)
return "<pending connection "..p.id.." to "..tostring(p.target_resolver.hostname)..">";
end;
};
function pending_connection_methods:log(level, message, ...)
log(level, "[pending connection %s] "..message, self.id, ...);
end
-- pending_connections_map[conn] = pending_connection
local pending_connections_map = {};
local pending_connection_listeners = {};
local function attempt_connection(p)
p:log("debug", "Checking for targets...");
if p.conn then
pending_connections_map[p.conn] = nil;
p.conn = nil;
end
p.target_resolver:next(function (conn_type, ip, port, extra)
if not conn_type then
-- No more targets to try
p:log("debug", "No more connection targets to try");
if p.listeners.onfail then
p.listeners.onfail(p.data, p.last_error or "unable to resolve service");
end
return;
end
p:log("debug", "Next target to try is %s:%d", ip, port);
local conn, err = server.addclient(ip, port, pending_connection_listeners, p.options.pattern or "*a", p.options.sslctx, conn_type, extra);
if not conn then
log("debug", "Connection attempt failed immediately: %s", tostring(err));
p.last_error = err or "unknown reason";
return attempt_connection(p);
end
p.conn = conn;
pending_connections_map[conn] = p;
end);
end
function pending_connection_listeners.onconnect(conn)
local p = pending_connections_map[conn];
if not p then
log("warn", "Successful connection, but unexpected! Closing.");
conn:close();
return;
end
pending_connections_map[conn] = nil;
p:log("debug", "Successfully connected");
conn:setlistener(p.listeners, p.data);
return p.listeners.onconnect(conn);
end
function pending_connection_listeners.ondisconnect(conn, reason)
local p = pending_connections_map[conn];
if not p then
log("warn", "Failed connection, but unexpected!");
return;
end
p.last_error = reason or "unknown reason";
p:log("debug", "Connection attempt failed: %s", p.last_error);
attempt_connection(p);
end
local function connect(target_resolver, listeners, options, data)
local p = setmetatable({
id = new_id();
target_resolver = target_resolver;
listeners = assert(listeners);
options = options or {};
data = data;
}, pending_connection_mt);
p:log("debug", "Starting connection process");
attempt_connection(p);
end
return {
connect = connect;
};