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377 lines
11 KiB
C++
377 lines
11 KiB
C++
// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#ifndef _MUNIN_CONNECTION_HANDLER_H_
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#define _MUNIN_CONNECTION_HANDLER_H_
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#include <string>
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#include "net_utils_base.h"
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#include "to_nonconst_iterator.h"
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#include "http_base.h"
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#include "reg_exp_definer.h"
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#define MUNIN_ARGS_DEFAULT(vertial_lable_str) "graph_args --base 1000 -l 0 --vertical-label " vertial_lable_str " \n"
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#define MUNIN_ARGS_FORCE_AUPPER_LIMIT(vertial_lable_str, limit) "graph_args --base 1000 -l 0 --vertical-label " vertial_lable_str " --rigid --upper-limit " limit " \n"
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#define MUNIN_TITLE(title_str) "graph_title " title_str "\n"
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#define MUNIN_CATEGORY(category_str) "graph_category " category_str "\n"
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#define MUNIN_INFO(info_str) "graph_info " info_str "\n"
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#define MUNIN_ENTRY(var_name) #var_name".label " #var_name "\n" #var_name".info "#var_name".\n"
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#define MUNIN_ENTRY_AREA(var_name) #var_name".label " #var_name "\n" #var_name".info "#var_name".\n" #var_name".draw AREASTACK\n"
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#define MUNIN_ENTRY_ALIAS(var_name, alias) #var_name".label " #alias"\n" #var_name".info "#alias".\n"
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#define BEGIN_MUNIN_SERVICE(servivece_name_str) if(servivece_name_str == pservice->m_service_name) {
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#define END_MUNIN_SERVICE() }
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#define MUNIN_SERVICE_PARAM(munin_var_name_str, variable) paramters_text += std::string() + munin_var_name_str ".value " + boost::lexical_cast<std::string>(variable) + "\n"
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namespace epee
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{
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namespace net_utils
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{
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namespace munin
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{
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/************************************************************************/
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/* */
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/************************************************************************/
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struct munin_service;
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struct munin_service_data_provider
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{
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virtual bool update_service_data(munin_service* pservice, std::string& paramters_text)=0;
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};
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struct munin_service
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{
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std::string m_service_name;
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std::string m_service_config_string;
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munin_service_data_provider* m_pdata_provider;
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};
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struct node_server_config
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{
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std::list<munin_service> m_services;
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//TODO:
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};
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struct fake_send_handler: public i_service_endpoint
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{
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virtual bool do_send(const void* ptr, size_t cb)
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{
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m_cache += std::string((const char*)ptr, cb);
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return true;
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}
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public:
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std::string m_cache;
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};
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/************************************************************************/
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/* */
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/************************************************************************/
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class munin_node_server_connection_handler
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{
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public:
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typedef node_server_config config_type;
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typedef connection_context_base connection_context;
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munin_node_server_connection_handler(i_service_endpoint* psnd_hndlr, config_type& config, const connection_context_base& context):m_psnd_hndlr(psnd_hndlr),
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m_machine_state(http_state_retriving_comand_line),
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m_config(config)
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{
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init();
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}
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virtual ~munin_node_server_connection_handler()
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{
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}
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bool release_protocol()
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{
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return true;
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}
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bool after_init_connection()
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{
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std::string hello_str = "# munin node at ";
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hello_str += m_host_name + "\n";
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send_hook(hello_str);
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return true;
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}
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virtual bool thread_init()
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{
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return true;
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}
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virtual bool thread_deinit()
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{
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return true;
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}
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void handle_qued_callback()
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{
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}
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virtual bool handle_recv(const void* ptr, size_t cb)
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{
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const char* pbuff = (const char*)ptr;
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std::string recvd_buff(pbuff, cb);
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LOG_PRINT("munin_recv: \n" << recvd_buff, LOG_LEVEL_3);
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m_cache += recvd_buff;
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bool stop_handling = false;
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while(!stop_handling)
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{
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switch(m_machine_state)
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{
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case http_state_retriving_comand_line:
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{
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std::string::size_type fpos = m_cache.find('\n');
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if(std::string::npos != fpos )
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{
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bool res = handle_command(m_cache);
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if(!res)
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return false;
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m_cache.erase(0, fpos+1);
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continue;
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}
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stop_handling = true;
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}
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break;
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case http_state_error:
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stop_handling = true;
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return false;
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default:
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LOG_ERROR("Error in munin state machine! Unknown state=" << m_machine_state);
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stop_handling = true;
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m_machine_state = http_state_error;
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return false;
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}
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}
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return true;
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}
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private:
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bool init()
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{
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char hostname[64] = {0};
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int res = gethostname(hostname, 64);
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hostname[63] = 0;//be happy
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m_host_name = hostname;
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return true;
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}
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bool handle_command(const std::string& command)
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{
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// list, nodes, config, fetch, version or quit
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STATIC_REGEXP_EXPR_1(rexp_match_command_line, "^((list)|(nodes)|(config)|(fetch)|(version)|(quit))(\\s+(\\S+))?", boost::regex::icase | boost::regex::normal);
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// 12 3 4 5 6 7 8 9
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size_t match_len = 0;
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boost::smatch result;
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if(boost::regex_search(command, result, rexp_match_command_line, boost::match_default) && result[0].matched)
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{
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if(result[2].matched)
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{//list command
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return handle_list_command();
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}else if(result[3].matched)
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{//nodes command
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return handle_nodes_command();
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}else if(result[4].matched)
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{//config command
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if(result[9].matched)
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return handle_config_command(result[9]);
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else
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{
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send_hook("Unknown service\n");
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}
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}else if(result[5].matched)
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{//fetch command
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if(result[9].matched)
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return handle_fetch_command(result[9]);
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else
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{
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send_hook("Unknown service\n");
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}
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}else if(result[6].matched)
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{//version command
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return handle_version_command();
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}else if(result[7].matched)
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{//quit command
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return handle_quit_command();
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}
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else
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return send_hook("Unknown command. Try list, nodes, config, fetch, version or quit\n");
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}
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return send_hook("Unknown command. Try list, nodes, config, fetch, version or quit\n");
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}
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bool handle_list_command()
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{
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std::string buff_to_send;
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for(std::list<munin_service>::const_iterator it = m_config.m_services.begin(); it!=m_config.m_services.end();it++)
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{
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buff_to_send += it->m_service_name + " ";
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}
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buff_to_send+='\n';
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return send_hook(buff_to_send);
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}
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bool handle_nodes_command()
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{
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//supports only one node - host name
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send_hook(m_host_name + "\n.\n");
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return true;
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}
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bool handle_config_command(const std::string& service_name)
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{
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munin_service* psrv = get_service_by_name(service_name);
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if(!psrv)
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return send_hook(std::string() + "Unknown service\n");
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return send_hook(psrv->m_service_config_string + ".\n");
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}
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bool handle_fetch_command(const std::string& service_name)
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{
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munin_service* psrv = get_service_by_name(service_name);
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if(!psrv)
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return send_hook(std::string() + "Unknown service\n");
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std::string buff;
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psrv->m_pdata_provider->update_service_data(psrv, buff);
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buff += ".\n";
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return send_hook(buff);
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}
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bool handle_version_command()
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{
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return send_hook("Munin node component by Andrey Sabelnikov\n");
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}
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bool handle_quit_command()
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{
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return false;
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}
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bool send_hook(const std::string& buff)
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{
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LOG_PRINT("munin_send: \n" << buff, LOG_LEVEL_3);
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if(m_psnd_hndlr)
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return m_psnd_hndlr->do_send(buff.data(), buff.size());
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else
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return false;
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}
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munin_service* get_service_by_name(const std::string& srv_name)
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{
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std::list<munin_service>::iterator it = m_config.m_services.begin();
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for(; it!=m_config.m_services.end(); it++)
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if(it->m_service_name == srv_name)
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break;
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if(it==m_config.m_services.end())
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return NULL;
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return &(*it);
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}
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enum machine_state{
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http_state_retriving_comand_line,
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http_state_error
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};
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config_type& m_config;
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machine_state m_machine_state;
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std::string m_cache;
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std::string m_host_name;
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protected:
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i_service_endpoint* m_psnd_hndlr;
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};
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inline bool test_self()
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{
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/*WSADATA w;
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::WSAStartup(MAKEWORD(1, 1), &w);
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node_server_config sc;
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sc.m_services.push_back(munin_service());
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sc.m_services.back().m_service_name = "test_service";
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sc.m_services.back().m_service_config_string =
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"graph_args --base 1000 -l 0 --vertical-label N --upper-limit 329342976\n"
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"graph_title REPORTS STATICTICS\n"
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"graph_category bind\n"
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"graph_info This graph shows how many reports came in fixed time period.\n"
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"graph_order apps free swap\n"
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"apps.label apps\n"
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"apps.draw AREA\n"
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"apps.info Memory used by user-space applications.\n"
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"swap.label swap\n"
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"swap.draw STACK\n"
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"swap.info Swap space used.\n"
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"free.label unused\n"
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"free.draw STACK\n"
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"free.info Wasted memory. Memory that is not used for anything at all.\n"
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"committed.label committed\n"
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"committed.draw LINE2\n"
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"committed.warn 625410048\n"
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"committed.info The amount of memory that would be used if all the memory that's been allocated were to be used.\n";
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sc.m_services.push_back(munin_service());
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sc.m_services.back().m_service_name = "test_service1";
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fake_send_handler fh;
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munin_node_server_connection_handler mh(&fh, sc);
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std::string buff = "list\n";
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mh.handle_recv(buff.data(), buff.size());
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buff = "nodes\n";
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mh.handle_recv(buff.data(), buff.size());
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*/
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return true;
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}
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}
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}
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}
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#endif//!_MUNIN_CONNECTION_HANDLER_H_
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