141 lines
4.6 KiB
C++
141 lines
4.6 KiB
C++
/*
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* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2.0,
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* as published by the Free Software Foundation.
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*
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* This program is also distributed with certain software (including
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* but not limited to OpenSSL) that is licensed under separate terms,
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* as designated in a particular file or component or in included license
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* documentation. The authors of MySQL hereby grant you an additional
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* permission to link the program and your derivative works with the
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* separately licensed software that they have included with MySQL.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License, version 2.0, for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// MySQL DB access module, for use by plugins and others
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// For the module that implements interactive DB functionality see mod_db
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#include <string>
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#include <vector>
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#include "mysqlxclient/xcompression.h"
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#include "plugin/x/client/mysqlxclient/xargument.h"
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#include "plugin/x/client/mysqlxclient/xerror.h"
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#include "plugin/x/client/xcompression_negotiator.h"
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namespace xcl {
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namespace {
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template <typename Validator>
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class To_variable_validator : public Validator {
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public:
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using Base = Validator;
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using Array_of_enums = typename Base::Array_of_enums;
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using Array_of_strings = typename Base::Array_of_strings;
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public:
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Array_of_enums m_enum_result;
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Array_of_strings m_string_result;
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bool ignore_unkown_text_values() const override { return true; }
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void store_to_result(const Argument_value &value) {
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Base::store(nullptr, value);
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}
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void visit_translate_with_source(
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const Array_of_enums &enum_result,
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const Array_of_strings &string_result) override {
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m_enum_result = enum_result;
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m_string_result = string_result;
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}
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};
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} // namespace
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void Capabilities_negotiator::server_supports_client_styles(
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const Array_of_strings &server_supported_client_styles) {}
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void Capabilities_negotiator::server_supports_server_styles(
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const Array_of_strings &server_supported_server_styles) {}
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void Capabilities_negotiator::server_supports_algorithms(
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const Array_of_strings &server_supported_algorithms) {}
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bool Capabilities_negotiator::is_negotiation_needed() const {
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return m_compression_mode != Compression_negotiation::k_disabled;
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}
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bool Capabilities_negotiator::update_compression_options(
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Compression_algorithm *out_algorithm, Compression_style *out_client_style,
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Compression_style *out_server_style, Capabilities_builder *out_builder,
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XError *out_error) {
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if (!was_chooses()) {
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if (is_compression_required()) {
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*out_error =
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XError{CR_X_REQUIRED_COMPRESSION_NOT_SUPPORTED,
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"Client's requirement for compression configuration is "
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"not supported by server or it was disabled"};
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}
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return false;
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}
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*out_algorithm = m_choosen_algorithm;
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*out_client_style = m_choosen_client_style;
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*out_server_style = m_choosen_server_style;
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out_builder->clear();
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Argument_object obj;
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obj["algorithm"] = m_choosen_algorithm_txt;
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if (Compression_style::k_none != m_choosen_client_style)
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obj["client_style"] = m_choosen_client_style_txt;
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if (Compression_style::k_none != m_choosen_server_style)
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obj["server_style"] = m_choosen_server_style_txt;
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out_builder->add_capability("compression", Argument_value{obj});
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return true;
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}
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bool Capabilities_negotiator::is_compression_required() const {
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return m_compression_mode == Compression_negotiation::k_required;
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}
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bool Capabilities_negotiator::was_chooses() const {
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if (m_choosen_algorithm == Compression_algorithm::k_none) return false;
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if (m_choosen_client_style == Compression_style::k_none &&
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m_choosen_server_style == Compression_style::k_none)
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return false;
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if (!m_compression_negotiation_client_style.empty() &&
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m_choosen_client_style == Compression_style::k_none)
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return false;
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if (!m_compression_negotiation_server_style.empty() &&
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m_choosen_server_style == Compression_style::k_none)
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return false;
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if (!m_compression_negotiation_algorithm.empty() &&
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m_choosen_algorithm == Compression_algorithm::k_none)
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return false;
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return true;
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}
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} // namespace xcl
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