/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apu.h"
#define HAVE_MYSQL_MYSQL_H
#if APU_HAVE_MYSQL
#include "apu_version.h"
#include "apu_config.h"
#include <ctype.h>
#include <stdlib.h>
#ifdef HAVE_MYSQL_H
#include <mysql.h>
#include <errmsg.h>
#elif defined(HAVE_MYSQL_MYSQL_H)
#include <mysql/mysql.h>
#include <mysql/errmsg.h>
#endif
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_dbd_internal.h"
/* default maximum field size 1 MB */
#define FIELDSIZE 1048575
struct apr_dbd_prepared_t {
MYSQL_STMT* stmt;
};
struct apr_dbd_transaction_t {
int errnum;
apr_dbd_t *handle;
};
struct apr_dbd_t {
MYSQL* conn ;
apr_dbd_transaction_t* trans ;
unsigned long fldsz;
};
struct apr_dbd_results_t {
int random;
MYSQL_RES *res;
MYSQL_STMT *statement;
MYSQL_BIND *bind;
};
struct apr_dbd_row_t {
MYSQL_ROW row;
apr_dbd_results_t *res;
};
static apr_status_t free_result(void *data)
{
mysql_free_result(data);
return APR_SUCCESS;
}
static int dbd_mysql_select(apr_pool_t *pool, apr_dbd_t *sql,
apr_dbd_results_t **results,
const char *query, int seek)
{
int sz;
int ret;
if (sql->trans && sql->trans->errnum) {
return sql->trans->errnum;
}
ret = mysql_query(sql->conn, query);
if (!ret) {
if (sz = mysql_field_count(sql->conn), sz > 0) {
if (!*results) {
*results = apr_palloc(pool, sizeof(apr_dbd_results_t));
}
(*results)->random = seek;
(*results)->statement = NULL;
if (seek) {
(*results)->res = mysql_store_result(sql->conn);
}
else {
(*results)->res = mysql_use_result(sql->conn);
}
apr_pool_cleanup_register(pool, (*results)->res,
free_result,apr_pool_cleanup_null);
}
} else {
ret = mysql_errno(sql->conn);
}
if (sql->trans) {
sql->trans->errnum = ret;
}
return ret;
}
static int dbd_mysql_get_row(apr_pool_t *pool, apr_dbd_results_t *res,
apr_dbd_row_t **row, int rownum)
{
MYSQL_ROW r = NULL;
int ret = 0;
if (res->statement) {
if (res->random) {
if (rownum >= 0) {
mysql_stmt_data_seek(res->statement, (my_ulonglong)rownum);
}
}
ret = mysql_stmt_fetch(res->statement);
switch (ret) {
case 1:
ret = mysql_stmt_errno(res->statement);
break;
case MYSQL_NO_DATA:
ret = -1;
break;
default:
ret = 0; /* bad luck - get_entry will deal with this */
break;
}
}
else {
if (res->random) {
if (rownum >= 0) {
mysql_data_seek(res->res, (my_ulonglong) rownum);
}
}
r = mysql_fetch_row(res->res);
if (r == NULL) {
ret = -1;
}
}
if (ret == 0) {
if (!*row) {
*row = apr_palloc(pool, sizeof(apr_dbd_row_t));
}
(*row)->row = r;
(*row)->res = res;
}
else {
apr_pool_cleanup_run(pool, res->res, free_result);
}
return ret;
}
#if 0
/* An improved API that was proposed but not followed up */
static int dbd_mysql_get_entry(const apr_dbd_row_t *row, int n,
apr_dbd_datum_t *val)
{
MYSQL_BIND *bind;
if (row->res->statement) {
bind = &row->res->bind[n];
if (mysql_stmt_fetch_column(row->res->statement, bind, n, 0) != 0) {
val->type = APR_DBD_VALUE_NULL;
return -1;
}
if (*bind->is_null) {
val->type = APR_DBD_VALUE_NULL;
return -1;
}
else {
val->type = APR_DBD_VALUE_STRING;
val->value.stringval = bind->buffer;
}
}
else {
val->type = APR_DBD_VALUE_STRING;
val->value.stringval = row->row[n];
}
return 0;
}
#else
static const char *dbd_mysql_get_entry(const apr_dbd_row_t *row, int n)
{
MYSQL_BIND *bind;
if (row->res->statement) {
bind = &row->res->bind[n];
if (mysql_stmt_fetch_column(row->res->statement, bind, n, 0) != 0) {
return NULL;
}
if (*bind->is_null) {
return NULL;
}
else {
return bind->buffer;
}
}
else {
return row->row[n];
}
return NULL;
}
#endif
static const char *dbd_mysql_error(apr_dbd_t *sql, int n)
{
return mysql_error(sql->conn);
}
static int dbd_mysql_query(apr_dbd_t *sql, int *nrows, const char *query)
{
int ret;
if (sql->trans && sql->trans->errnum) {
return sql->trans->errnum;
}
ret = mysql_query(sql->conn, query);
if (ret != 0) {
ret = mysql_errno(sql->conn);
}
*nrows = mysql_affected_rows(sql->conn);
if (sql->trans) {
sql->trans->errnum = ret;
}
return ret;
}
static const char *dbd_mysql_escape(apr_pool_t *pool, const char *arg,
apr_dbd_t *sql)
{
unsigned long len = strlen(arg);
char *ret = apr_palloc(pool, 2*len + 1);
mysql_real_escape_string(sql->conn, ret, arg, len);
return ret;
}
static apr_status_t stmt_close(void *data)
{
mysql_stmt_close(data);
return APR_SUCCESS;
}
static int dbd_mysql_prepare(apr_pool_t *pool, apr_dbd_t *sql,
const char *query, const char *label,
apr_dbd_prepared_t **statement)
{
/* Translate from apr_dbd to native query format */
char *myquery = apr_pstrdup(pool, query);
char *p = myquery;
const char *q;
int ret;
for (q = query; *q; ++q) {
if (q[0] == '%') {
if (isalpha(q[1])) {
*p++ = '?';
++q;
}
else if (q[1] == '%') {
/* reduce %% to % */
*p++ = *q++;
}
else {
*p++ = *q;
}
}
else {
*p++ = *q;
}
}
*p = 0;
if (!*statement) {
*statement = apr_palloc(pool, sizeof(apr_dbd_prepared_t));
}
(*statement)->stmt = mysql_stmt_init(sql->conn);
if ((*statement)->stmt) {
apr_pool_cleanup_register(pool, (*statement)->stmt,
stmt_close, apr_pool_cleanup_null);
ret = mysql_stmt_prepare((*statement)->stmt, myquery, strlen(myquery));
if (ret != 0) {
ret = mysql_stmt_errno((*statement)->stmt);
}
return ret;
}
return CR_OUT_OF_MEMORY;
}
static int dbd_mysql_pquery(apr_pool_t *pool, apr_dbd_t *sql,
int *nrows, apr_dbd_prepared_t *statement,
int nargs, const char **values)
{
MYSQL_BIND *bind;
char *arg;
int ret;
int i;
my_bool is_null = FALSE;
if (sql->trans && sql->trans->errnum) {
return sql->trans->errnum;
}
nargs = mysql_stmt_param_count(statement->stmt);
bind = apr_palloc(pool, nargs*sizeof(MYSQL_BIND));
for (i=0; i < nargs; ++i) {
arg = (char*)values[i];
bind[i].buffer_type = MYSQL_TYPE_VAR_STRING;
bind[i].buffer = arg;
bind[i].buffer_length = strlen(arg);
bind[i].length = &bind[i].buffer_length;
bind[i].is_null = &is_null;
bind[i].is_unsigned = 0;
}
ret = mysql_stmt_bind_param(statement->stmt, bind);
if (ret != 0) {
*nrows = 0;
ret = mysql_stmt_errno(statement->stmt);
}
else {
ret = mysql_stmt_execute(statement->stmt);
if (ret != 0) {
ret = mysql_stmt_errno(statement->stmt);
}
*nrows = mysql_stmt_affected_rows(statement->stmt);
}
if (sql->trans) {
sql->trans->errnum = ret;
}
return ret;
}
static int dbd_mysql_pvquery(apr_pool_t *pool, apr_dbd_t *sql, int *nrows,
apr_dbd_prepared_t *statement, va_list args)
{
MYSQL_BIND *bind;
char *arg;
int ret;
int nargs = 0;
int i;
my_bool is_null = FALSE;
if (sql->trans && sql->trans->errnum) {
return sql->trans->errnum;
}
nargs = mysql_stmt_param_count(statement->stmt);
bind = apr_palloc(pool, nargs*sizeof(MYSQL_BIND));
for (i=0; i < nargs; ++i) {
arg = va_arg(args, char*);
bind[i].buffer_type = MYSQL_TYPE_VAR_STRING;
bind[i].buffer = arg;
bind[i].buffer_length = strlen(arg);
bind[i].length = &bind[i].buffer_length;
bind[i].is_null = &is_null;
bind[i].is_unsigned = 0;
}
ret = mysql_stmt_bind_param(statement->stmt, bind);
if (ret != 0) {
*nrows = 0;
ret = mysql_stmt_errno(statement->stmt);
}
else {
ret = mysql_stmt_execute(statement->stmt);
if (ret != 0) {
ret = mysql_stmt_errno(statement->stmt);
}
*nrows = mysql_stmt_affected_rows(statement->stmt);
}
if (sql->trans) {
sql->trans->errnum = ret;
}
return ret;
}
static int dbd_mysql_pselect(apr_pool_t *pool, apr_dbd_t *sql,
apr_dbd_results_t **res,
apr_dbd_prepared_t *statement, int random,
int nargs, const char **args)
{
int i;
int nfields;
char *arg;
my_bool is_null = FALSE;
my_bool *is_nullr;
#if MYSQL_VERSION_ID >= 50000
my_bool *error;
#endif
int ret;
unsigned long *length, maxlen;
MYSQL_BIND *bind;
if (sql->trans && sql->trans->errnum) {
return sql->trans->errnum;
}
nargs = mysql_stmt_param_count(statement->stmt);
bind = apr_palloc(pool, nargs*sizeof(MYSQL_BIND));
for (i=0; i < nargs; ++i) {
arg = (char*)args[i];
bind[i].buffer_type = MYSQL_TYPE_VAR_STRING;
bind[i].buffer = arg;
bind[i].buffer_length = strlen(arg);
bind[i].length = &bind[i].buffer_length;
bind[i].is_null = &is_null;
bind[i].is_unsigned = 0;
}
ret = mysql_stmt_bind_param(statement->stmt, bind);
if (ret == 0) {
ret = mysql_stmt_execute(statement->stmt);
if (!ret) {
if (!*res) {
*res = apr_pcalloc(pool, sizeof(apr_dbd_results_t));
}
(*res)->random = random;
(*res)->statement = statement->stmt;
(*res)->res = mysql_stmt_result_metadata(statement->stmt);
apr_pool_cleanup_register(pool, (*res)->res,
free_result, apr_pool_cleanup_null);
nfields = mysql_num_fields((*res)->res);
if (!(*res)->bind) {
(*res)->bind = apr_palloc(pool, nfields*sizeof(MYSQL_BIND));
length = apr_pcalloc(pool, nfields*sizeof(unsigned long));
#if MYSQL_VERSION_ID >= 50000
error = apr_palloc(pool, nfields*sizeof(my_bool));
#endif
is_nullr = apr_pcalloc(pool, nfields*sizeof(my_bool));
for ( i = 0; i < nfields; ++i ) {
maxlen = ((*res)->res->fields[i].length < sql->fldsz ?
(*res)->res->fields[i].length : sql->fldsz) + 1;
(*res)->bind[i].buffer_type = MYSQL_TYPE_VAR_STRING;
(*res)->bind[i].buffer_length = maxlen;
(*res)->bind[i].length = &length[i];
(*res)->bind[i].buffer = apr_palloc(pool, maxlen);
(*res)->bind[i].is_null = is_nullr+i;
#if MYSQL_VERSION_ID >= 50000
(*res)->bind[i].error = error+i;
#endif
}
}
ret = mysql_stmt_bind_result(statement->stmt, (*res)->bind);
if (!ret) {
ret = mysql_stmt_store_result(statement->stmt);
}
}
}
if (ret != 0) {
ret = mysql_stmt_errno(statement->stmt);
}
if (sql->trans) {
sql->trans->errnum = ret;
}
return ret;
}
static int dbd_mysql_pvselect(apr_pool_t *pool, apr_dbd_t *sql,
apr_dbd_results_t **res,
apr_dbd_prepared_t *statement, int random,
va_list args)
{
int i;
int nfields;
char *arg;
my_bool is_null = FALSE;
my_bool *is_nullr;
#if MYSQL_VERSION_ID >= 50000
my_bool *error;
#endif
int ret;
unsigned long *length, maxlen;
int nargs;
MYSQL_BIND *bind;
if (sql->trans && sql->trans->errnum) {
return sql->trans->errnum;
}
nargs = mysql_stmt_param_count(statement->stmt);
bind = apr_palloc(pool, nargs*sizeof(MYSQL_BIND));
for (i=0; i < nargs; ++i) {
arg = va_arg(args, char*);
bind[i].buffer_type = MYSQL_TYPE_VAR_STRING;
bind[i].buffer = arg;
bind[i].buffer_length = strlen(arg);
bind[i].length = &bind[i].buffer_length;
bind[i].is_null = &is_null;
bind[i].is_unsigned = 0;
}
ret = mysql_stmt_bind_param(statement->stmt, bind);
if (ret == 0) {
ret = mysql_stmt_execute(statement->stmt);
if (!ret) {
if (!*res) {
*res = apr_pcalloc(pool, sizeof(apr_dbd_results_t));
}
(*res)->random = random;
(*res)->statement = statement->stmt;
(*res)->res = mysql_stmt_result_metadata(statement->stmt);
apr_pool_cleanup_register(pool, (*res)->res,
free_result, apr_pool_cleanup_null);
nfields = mysql_num_fields((*res)->res);
if (!(*res)->bind) {
(*res)->bind = apr_palloc(pool, nfields*sizeof(MYSQL_BIND));
length = apr_pcalloc(pool, nfields*sizeof(unsigned long));
#if MYSQL_VERSION_ID >= 50000
error = apr_palloc(pool, nfields*sizeof(my_bool));
#endif
is_nullr = apr_pcalloc(pool, nfields*sizeof(my_bool));
for ( i = 0; i < nfields; ++i ) {
maxlen = ((*res)->res->fields[i].length < sql->fldsz ?
(*res)->res->fields[i].length : sql->fldsz) + 1;
(*res)->bind[i].buffer_type = MYSQL_TYPE_VAR_STRING;
(*res)->bind[i].buffer_length = maxlen;
(*res)->bind[i].length = &length[i];
(*res)->bind[i].buffer = apr_palloc(pool, maxlen);
(*res)->bind[i].is_null = is_nullr+i;
#if MYSQL_VERSION_ID >= 50000
(*res)->bind[i].error = error+i;
#endif
}
}
ret = mysql_stmt_bind_result(statement->stmt, (*res)->bind);
if (!ret) {
ret = mysql_stmt_store_result(statement->stmt);
}
}
}
if (ret != 0) {
ret = mysql_stmt_errno(statement->stmt);
}
if (sql->trans) {
sql->trans->errnum = ret;
}
return ret;
}
static int dbd_mysql_end_transaction(apr_dbd_transaction_t *trans)
{
int ret = -1;
if (trans) {
if (trans->errnum) {
trans->errnum = 0;
ret = mysql_rollback(trans->handle->conn);
}
else {
ret = mysql_commit(trans->handle->conn);
}
}
ret |= mysql_autocommit(trans->handle->conn, 1);
trans->handle->trans = NULL;
return ret;
}
/* Whether or not transactions work depends on whether the
* underlying DB supports them within MySQL. Unfortunately
* it fails silently with the default InnoDB.
*/
static int dbd_mysql_transaction(apr_pool_t *pool, apr_dbd_t *handle,
apr_dbd_transaction_t **trans)
{
/* Don't try recursive transactions here */
if (handle->trans) {
dbd_mysql_end_transaction(handle->trans) ;
}
if (!*trans) {
*trans = apr_pcalloc(pool, sizeof(apr_dbd_transaction_t));
}
(*trans)->errnum = mysql_autocommit(handle->conn, 0);
(*trans)->handle = handle;
handle->trans = *trans;
return (*trans)->errnum;
}
static apr_dbd_t *dbd_mysql_open(apr_pool_t *pool, const char *params)
{
static const char *const delims = " \r\n\t;|,";
const char *ptr;
int i;
const char *key;
size_t klen;
const char *value;
size_t vlen;
#if MYSQL_VERSION_ID >= 50013
my_bool do_reconnect = 1;
#endif
MYSQL *real_conn;
unsigned long flags = 0;
struct {
const char *field;
const char *value;
} fields[] = {
{"host", NULL},
{"user", NULL},
{"pass", NULL},
{"dbname", NULL},
{"port", NULL},
{"sock", NULL},
{"flags", NULL},
{"fldsz", NULL},
{NULL, NULL}
};
unsigned int port = 0;
apr_dbd_t *sql = apr_pcalloc(pool, sizeof(apr_dbd_t));
sql->fldsz = FIELDSIZE;
sql->conn = mysql_init(sql->conn);
if ( sql->conn == NULL ) {
return NULL;
}
for (ptr = strchr(params, '='); ptr; ptr = strchr(ptr, '=')) {
for (key = ptr-1; isspace(*key); --key);
klen = 0;
while (isalpha(*key)) {
/* don't parse backwards off the start of the string */
if (key == params) {
--key;
++klen;
break;
}
--key;
++klen;
}
++key;
for (value = ptr+1; isspace(*value); ++value);
vlen = strcspn(value, delims);
for (i = 0; fields[i].field != NULL; i++) {
if (!strncasecmp(fields[i].field, key, klen)) {
fields[i].value = apr_pstrndup(pool, value, vlen);
break;
}
}
ptr = value+vlen;
}
if (fields[4].value != NULL) {
port = atoi(fields[4].value);
}
if (fields[6].value != NULL &&
!strcmp(fields[6].value, "CLIENT_FOUND_ROWS")) {
flags |= CLIENT_FOUND_ROWS; /* only option we know */
}
if (fields[7].value != NULL) {
sql->fldsz = atol(fields[7].value);
}
#if MYSQL_VERSION_ID >= 50013
/* the MySQL manual says this should be BEFORE mysql_real_connect */
mysql_options(sql->conn, MYSQL_OPT_RECONNECT, &do_reconnect);
#endif
real_conn = mysql_real_connect(sql->conn, fields[0].value,
fields[1].value, fields[2].value,
fields[3].value, port,
fields[5].value, flags);
if(real_conn == NULL) {
mysql_close(sql->conn);
return NULL;
}
#if MYSQL_VERSION_ID >= 50013
/* Some say this should be AFTER mysql_real_connect */
mysql_options(sql->conn, MYSQL_OPT_RECONNECT, &do_reconnect);
#endif
return sql;
}
static apr_status_t dbd_mysql_close(apr_dbd_t *handle)
{
mysql_close(handle->conn);
return APR_SUCCESS;
}
static apr_status_t dbd_mysql_check_conn(apr_pool_t *pool,
apr_dbd_t *handle)
{
return mysql_ping(handle->conn) ? APR_EGENERAL : APR_SUCCESS;
}
static int dbd_mysql_select_db(apr_pool_t *pool, apr_dbd_t* handle,
const char* name)
{
return mysql_select_db(handle->conn, name);
}
static void *dbd_mysql_native(apr_dbd_t *handle)
{
return handle->conn;
}
static int dbd_mysql_num_cols(apr_dbd_results_t *res)
{
if (res->statement) {
return mysql_stmt_field_count(res->statement);
}
else {
return mysql_num_fields(res->res);
}
}
static int dbd_mysql_num_tuples(apr_dbd_results_t *res)
{
if (res->random) {
if (res->statement) {
return (int) mysql_stmt_num_rows(res->statement);
}
else {
return (int) mysql_num_rows(res->res);
}
}
else {
return -1;
}
}
static apr_status_t thread_end(void *data)
{
mysql_thread_end();
return APR_SUCCESS;
}
static void dbd_mysql_init(apr_pool_t *pool)
{
my_init();
/* FIXME: this is a guess; find out what it really does */
apr_pool_cleanup_register(pool, NULL, thread_end, apr_pool_cleanup_null);
}
APU_DECLARE_DATA const apr_dbd_driver_t apr_dbd_mysql_driver = {
"mysql",
dbd_mysql_init,
dbd_mysql_native,
dbd_mysql_open,
dbd_mysql_check_conn,
dbd_mysql_close,
dbd_mysql_select_db,
dbd_mysql_transaction,
dbd_mysql_end_transaction,
dbd_mysql_query,
dbd_mysql_select,
dbd_mysql_num_cols,
dbd_mysql_num_tuples,
dbd_mysql_get_row,
dbd_mysql_get_entry,
dbd_mysql_error,
dbd_mysql_escape,
dbd_mysql_prepare,
dbd_mysql_pvquery,
dbd_mysql_pvselect,
dbd_mysql_pquery,
dbd_mysql_pselect
};
#endif