mirror of https://github.com/BOINC/boinc.git
535 lines
13 KiB
C++
535 lines
13 KiB
C++
// This file is part of BOINC.
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// http://boinc.berkeley.edu
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// Copyright (C) 2008 University of California
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//
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// BOINC is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License
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// as published by the Free Software Foundation,
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// either version 3 of the License, or (at your option) any later version.
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//
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// BOINC 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.
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// See the GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
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#include "config.h"
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#include <cstdio>
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#include <cstring>
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#include <cstdlib>
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#include <mysql.h>
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#include "error_numbers.h"
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#include "str_util.h"
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#include "str_replace.h"
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#include "db_base.h"
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#ifdef _USING_FCGI_
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#include "fcgi_stdio.h"
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#include "sched_msgs.h"
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#endif
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bool g_print_queries = false;
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DB_CONN::DB_CONN() {
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mysql = 0;
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}
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int DB_CONN::open(
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char* db_name, char* db_host, char* db_user, char* dbpassword
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) {
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mysql = mysql_init(0);
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if (!mysql) return ERR_DB_CANT_INIT;
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// MySQL's support for the reconnect option has changed over time:
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// see http://dev.mysql.com/doc/refman/5.0/en/mysql-options.html
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// and http://dev.mysql.com/doc/refman/5.1/en/mysql-options.html
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//
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// v < 5.0.13: not supported
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// 5.0.13 <= v < 5.0.19: set option after real_connect()
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// 5.0.19 < v < 5.1: set option before real_connect();
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// 5.1.0 <= v < 5.1.6: set option after real_connect()
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// 5.1.6 <= v: set option before real_connect
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int v = MYSQL_VERSION_ID;
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bool set_opt_before = false, set_opt_after = false;
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if (v < 50013 ) {
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} else if (v < 50019) {
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set_opt_after = true;
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} else if (v < 50100) {
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set_opt_before = true;
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} else if (v < 50106) {
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set_opt_after = true;
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} else {
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set_opt_before = true;
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}
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if (set_opt_before) {
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my_bool mbReconnect = 1;
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mysql_options(mysql, MYSQL_OPT_RECONNECT, &mbReconnect);
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}
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// parse hostname:port
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//
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char host[256];
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int port = 0;
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safe_strcpy(host, db_host);
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char* p = strchr(host, ':');
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if (p) {
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*p = 0;
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port = atoi(p+1);
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}
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// CLIENT_FOUND_ROWS means that the # of affected rows for an update
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// is the # matched by the where, rather than the # actually changed
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//
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mysql = mysql_real_connect(
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mysql, host, db_user, dbpassword, db_name, port, 0, CLIENT_FOUND_ROWS
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);
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if (mysql == 0) return ERR_DB_CANT_CONNECT;
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if (set_opt_after) {
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my_bool mbReconnect = 1;
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mysql_options(mysql, MYSQL_OPT_RECONNECT, &mbReconnect);
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}
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return 0;
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}
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void DB_CONN::close() {
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if (mysql) mysql_close(mysql);
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}
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int DB_CONN::set_isolation_level(ISOLATION_LEVEL level) {
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const char* level_str;
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char query[256];
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switch(level) {
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case READ_UNCOMMITTED:
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level_str = "READ UNCOMMITTED";
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break;
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case READ_COMMITTED:
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level_str = "READ COMMITTED";
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break;
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case REPEATABLE_READ:
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level_str = "REPEATABLE READ";
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break;
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case SERIALIZABLE:
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level_str = "SERIALIZABLE";
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break;
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default:
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return -1;
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}
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sprintf(query, "SET SESSION TRANSACTION ISOLATION LEVEL %s", level_str);
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return do_query(query);
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}
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int DB_CONN::do_query(const char* p) {
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int retval;
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if (g_print_queries) {
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#ifdef _USING_FCGI_
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log_messages.printf(MSG_NORMAL, "query: %s\n", p);
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#else
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fprintf(stderr, "query: %s\n", p);
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#endif
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}
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retval = mysql_query(mysql, p);
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if (retval) {
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fprintf(stderr, "Database error: %s\nquery=%s\n", error_string(), p);
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}
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return retval;
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}
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// returns the number of rows matched by an update query
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//
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int DB_CONN::affected_rows() {
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unsigned long x = (unsigned long)mysql_affected_rows(mysql);
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//fprintf(stderr, "x: %lu i: %d\n", x, (int)x);
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return (int)x;
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}
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int DB_CONN::insert_id() {
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* rp;
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retval = do_query("select LAST_INSERT_ID()");
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if (retval) return retval;
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rp = mysql_store_result(mysql);
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row = mysql_fetch_row(rp);
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int x = atoi(row[0]);
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mysql_free_result(rp);
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return x;
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}
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void DB_CONN::print_error(const char* p) {
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fprintf(stderr, "%s: Database error: %s\n", p, error_string());
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}
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const char* DB_CONN::error_string() {
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return mysql?mysql_error(mysql):"Not connected";
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}
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int DB_CONN::start_transaction() {
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return do_query("START TRANSACTION");
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}
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int DB_CONN::commit_transaction() {
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return do_query("COMMIT");
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}
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int DB_CONN::rollback_transaction() {
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return do_query("ROLLBACK");
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}
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int DB_CONN::ping() {
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int retval = mysql_ping(mysql);
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if (retval) return ERR_DB_CANT_CONNECT;
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return 0;
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}
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DB_BASE::DB_BASE(const char *tn, DB_CONN* p) : db(p), table_name(tn) {
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}
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DB_ID_TYPE DB_BASE::get_id() { return 0;}
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void DB_BASE::db_print(char*) {}
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void DB_BASE::db_parse(MYSQL_ROW&) {}
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int DB_BASE::insert() {
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char vals[MAX_QUERY_LEN*2], query[MAX_QUERY_LEN*2];
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db_print(vals);
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sprintf(query, "insert into %s set %s", table_name, vals);
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return db->do_query(query);
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}
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int DB_BASE::insert_batch(std::string& values) {
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std::string query;
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query = "insert into " + std::string(table_name) + " values " + values;
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return db->do_query(query.c_str());
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}
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int DB_BASE::affected_rows() {
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return db->affected_rows();
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}
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//////////// FUNCTIONS FOR TABLES THAT HAVE AN ID FIELD ///////
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int DB_BASE::lookup_id(DB_ID_TYPE id) {
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char query[MAX_QUERY_LEN];
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* rp;
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sprintf(query, "select * from %s where id=%lu", table_name, id);
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retval = db->do_query(query);
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if (retval) return retval;
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rp = mysql_store_result(db->mysql);
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if (!rp) return -1;
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row = mysql_fetch_row(rp);
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if (row) db_parse(row);
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mysql_free_result(rp);
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if (row == 0) return ERR_DB_NOT_FOUND;
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// don't bother checking for uniqueness here
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return 0;
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}
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// update an entire record
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//
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int DB_BASE::update() {
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char vals[MAX_QUERY_LEN], query[MAX_QUERY_LEN];
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db_print(vals);
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sprintf(query, "update %s set %s where id=%lu", table_name, vals, get_id());
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int retval = db->do_query(query);
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if (retval) return retval;
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if (db->affected_rows() != 1) return ERR_DB_NOT_FOUND;
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return 0;
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}
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// update one or more fields
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// "clause" is something like "foo=5, blah='xxx'" or "foo=foo+5"
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//
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int DB_BASE::update_field(const char* clause, const char* where_clause) {
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char query[MAX_QUERY_LEN];
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if (where_clause) {
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sprintf(query, "update %s set %s where id=%lu and %s",
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table_name, clause, get_id(), where_clause
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);
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} else {
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sprintf(query, "update %s set %s where id=%lu",
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table_name, clause, get_id()
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);
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}
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return db->do_query(query);
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}
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// delete record
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//
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int DB_BASE::delete_from_db() {
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char query[MAX_QUERY_LEN];
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sprintf(query, "delete from %s where id=%lu", table_name, get_id());
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return db->do_query(query);
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}
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int DB_BASE::delete_from_db_multi(const char* where_clause) {
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char query[MAX_QUERY_LEN];
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sprintf(query, "delete from %s where %s", table_name, where_clause);
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return db->do_query(query);
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}
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int DB_BASE::get_field_ints(const char* fields, int nfields, int* vals) {
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char query[MAX_QUERY_LEN];
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* rp;
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sprintf(query,
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"select %s from %s where id=%lu", fields, table_name, get_id()
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);
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retval = db->do_query(query);
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if (retval) return retval;
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rp = mysql_store_result(db->mysql);
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if (!rp) return -1;
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row = mysql_fetch_row(rp);
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if (row) {
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for (int i=0; i<nfields; i++) {
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vals[i] = atoi(row[i]);
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}
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}
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mysql_free_result(rp);
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if (row == 0) return ERR_DB_NOT_FOUND;
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return 0;
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}
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int DB_BASE::get_field_str(const char* field, char* buf, int buflen) {
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char query[MAX_QUERY_LEN];
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* rp;
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sprintf(query,
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"select %s from %s where id=%lu", field, table_name, get_id()
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);
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retval = db->do_query(query);
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if (retval) return retval;
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rp = mysql_store_result(db->mysql);
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if (!rp) return -1;
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row = mysql_fetch_row(rp);
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if (row && row[0]) {
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strlcpy(buf, row[0], buflen);
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}
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mysql_free_result(rp);
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if (row == 0) return ERR_DB_NOT_FOUND;
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return 0;
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}
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int DB_BASE::max_id(DB_ID_TYPE& n, const char* clause) {
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char query[MAX_QUERY_LEN];
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sprintf(query, "select max(id) from %s %s", table_name, clause);
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return get_long(query, n);
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}
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/////////////// FUNCTIONS THAT DON'T REQUIRE AN ID FIELD ///////////////
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int DB_BASE::lookup(const char* clause) {
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char query[MAX_QUERY_LEN];
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* rp;
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sprintf(query, "select * from %s %s", table_name, clause);
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retval = db->do_query(query);
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if (retval) return retval;
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rp = mysql_store_result(db->mysql);
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if (!rp) return -1;
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row = mysql_fetch_row(rp);
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if (row) db_parse(row);
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mysql_free_result(rp);
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if (row == 0) return ERR_DB_NOT_FOUND;
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return 0;
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}
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int DB_BASE::update_fields_noid(const char* set_clause, const char* where_clause) {
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char query[MAX_QUERY_LEN];
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sprintf(query,
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"update %s set %s where %s",
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table_name, set_clause, where_clause
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);
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int retval = db->do_query(query);
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if (retval) return retval;
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return 0;
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}
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// Note: AFAIK, if one enumeration is active you can't do another one
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//
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int DB_BASE::enumerate(const char* clause, bool use_use_result) {
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int x;
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char query[MAX_QUERY_LEN];
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MYSQL_ROW row;
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if (!cursor.active) {
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cursor.active = true;
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sprintf(query, "select * from %s %s", table_name, clause);
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x = db->do_query(query);
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if (x) return mysql_errno(db->mysql);
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// if you use mysql_use_result() here,
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// any other transactions will fail
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//
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if (use_use_result) {
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cursor.rp = mysql_use_result(db->mysql);
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} else {
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cursor.rp = mysql_store_result(db->mysql);
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}
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if (!cursor.rp) return mysql_errno(db->mysql);
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}
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row = mysql_fetch_row(cursor.rp);
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if (!row) {
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mysql_free_result(cursor.rp);
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cursor.active = false;
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x = mysql_errno(db->mysql);
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if (x) return x;
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return ERR_DB_NOT_FOUND;
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} else {
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db_parse(row);
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}
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return 0;
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}
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// call this to end an enumeration before reaching end
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//
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int DB_BASE::end_enumerate() {
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if (cursor.active) {
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mysql_free_result(cursor.rp);
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cursor.active = false;
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}
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return 0;
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}
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int DB_BASE::get_long(const char* query, long& n) {
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* resp;
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retval = db->do_query(query);
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if (retval) return retval;
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resp = mysql_store_result(db->mysql);
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if (!resp) return ERR_DB_NOT_FOUND;
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row = mysql_fetch_row(resp);
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if (!row || !row[0]) {
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retval = ERR_DB_NOT_FOUND;
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} else {
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n = atol(row[0]);
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}
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mysql_free_result(resp);
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return retval;
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}
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int DB_CONN::get_double(const char* query, double& x) {
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int retval;
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MYSQL_ROW row;
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MYSQL_RES* resp;
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retval = do_query(query);
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if (retval) return retval;
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resp = mysql_store_result(mysql);
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if (!resp) return ERR_DB_NOT_FOUND;
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row = mysql_fetch_row(resp);
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if (!row || !row[0]) {
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retval = ERR_DB_NOT_FOUND;
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} else {
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x = atof(row[0]);
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}
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mysql_free_result(resp);
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return retval;
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}
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int DB_BASE::count(long& n, const char* clause) {
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char query[MAX_QUERY_LEN];
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sprintf(query, "select count(*) from %s %s", table_name, clause);
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return get_long(query, n);
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}
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int DB_BASE::sum(double& x, const char* field, const char* clause) {
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char query[MAX_QUERY_LEN];
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sprintf(query, "select sum(%s) from %s %s", field, table_name, clause);
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return db->get_double(query, x);
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}
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DB_BASE_SPECIAL::DB_BASE_SPECIAL(DB_CONN* p) : db(p) {
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}
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// convert a string into a form that allows it to be used
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// in SQL queries delimited by single quotes:
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// replace ' with \', '\' with '\\'
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//
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void escape_string(char* field, int len) {
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char buf[MAX_QUERY_LEN];
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char* q = buf, *p = field;
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if (len > MAX_QUERY_LEN) {
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len = MAX_QUERY_LEN;
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}
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// Make sure that final result won't overflow field[].
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//
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while (*p && q < buf+len-3) {
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if (*p == '\'') {
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// this does ' to \' transformation
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//
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*q++ = '\\';
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*q++ = '\'';
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} else if (*p == '\\') {
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// this does \ to \\ transformation
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//
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*q++ = '\\';
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*q++ = '\\';
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} else {
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// this handles all other characters
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//
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*q++ = *p;
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}
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p++;
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}
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*q = 0;
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strlcpy(field, buf, len);
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}
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// undo the above process
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// (len not used because this doesn't expand the string)
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//
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void unescape_string(char* p, int /*len*/) {
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char* q = p;
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while (*p) {
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if (*p == '\\') {
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p++;
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if (!*p) break; // SHOULD NEVER HAPPEN!
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}
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*q++ = *p++;
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}
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*q='\0';
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}
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// replace _ with \\_, % with \\%
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//
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void escape_mysql_like_pattern(const char* in, char* out) {
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while (*in) {
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if (*in == '_' || *in == '%') {
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*out++ = '\\';
|
|
*out++ = '\\';
|
|
}
|
|
*out++ = *in++;
|
|
}
|
|
}
|
|
|
|
const char *BOINC_RCSID_43d919556b = "$Id$";
|