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Copy pathoptions.hpp
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59 lines (54 loc) · 2.74 KB
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/*
This file is part of libhttpserver
Copyright (C) 2011-2026 Sebastiano Merlino
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the file
LICENSE in the distribution; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
#ifndef SRC_HTTPSERVER_WEBSOCKET_OPTIONS_HPP_
#define SRC_HTTPSERVER_WEBSOCKET_OPTIONS_HPP_
#include <cstddef>
#include <limits>
#include <httpserver/http/outcome.hpp>
#include <httpserver/server/budgets.hpp>
namespace httpserver::websocket {
struct options {
std::size_t max_message_bytes = 1048576;
std::size_t incoming_bytes = 8388608;
std::size_t output_bytes = 4194304;
std::size_t incoming_messages = 64;
std::size_t outgoing_messages = 64;
// Counts bound empty-message traffic and queue metadata independently
// of byte limits. Control output has a separate fixed reservation:
// one active control, one pending Pong and one pending Close.
static options from_budgets(const server::budget_limits& limits) {
options out;
out.max_message_bytes = limits.get(server::resource::ws_message_bytes);
out.incoming_bytes = limits.get(server::resource::body_buffer_bytes);
out.output_bytes = limits.get(server::resource::response_queue_bytes);
return out;
}
http::outcome validate() const {
const auto ceiling = server::max_capacity(server::resource::ws_message_bytes);
if (max_message_bytes > ceiling || incoming_bytes < max_message_bytes)
return {http::outcome_code::invalid_argument, "invalid incoming message limits"};
const std::size_t overhead = max_message_bytes < 126 ? 2 : max_message_bytes <= 65535 ? 4 : 10;
if (output_bytes < max_message_bytes + overhead)
return {http::outcome_code::invalid_argument, "output must fit one maximum message"};
if (incoming_messages == 0 || outgoing_messages == 0)
return {http::outcome_code::invalid_argument, "message counts must be positive"};
return http::outcome::okay();
}
};
} // namespace httpserver::websocket
#endif // SRC_HTTPSERVER_WEBSOCKET_OPTIONS_HPP_