Add option to res_config_mysql and app_mysql to specify a character set that

MySQL should use.
 (closes issue 17948)
 Reported by qmax.


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@290939 65c4cc65-6c06-0410-ace0-fbb531ad65f3

addons/app_mysql.c

@@ -57,10 +57,10 @@ static const char descrip[] =
 "Syntax:\n"
 "  MYSQL(Set timeout <num>)\n"
 "    Set the connection timeout, in seconds.\n"
-"  MYSQL(Connect connid dhhost dbuser dbpass dbname)\n"
+"  MYSQL(Connect connid dhhost dbuser dbpass dbname [dbcharset])\n"
 "    Connects to a database.  Arguments contain standard MySQL parameters\n"
-"    passed to function mysql_real_connect.  Connection identifer returned\n"
-"    in ${connid}\n"
+"    passed to function mysql_real_connect.  Optional parameter dbcharset\n"
+"    defaults to 'latin1'.  Connection identifer returned in ${connid}\n"
 "  MYSQL(Query resultid ${connid} query-string)\n"
 "    Executes standard MySQL query contained in query-string using established\n"
 "    connection identified by ${connid}. Result of query is stored in ${resultid}.\n"
@@ -80,7 +80,7 @@ static const char descrip[] =
 /*
 EXAMPLES OF USE :
 
-exten => s,2,MYSQL(Connect connid localhost asterisk mypass credit)
+exten => s,2,MYSQL(Connect connid localhost asterisk mypass credit utf8)
 exten => s,3,MYSQL(Query resultid ${connid} SELECT username,credit FROM credit WHERE callerid=${CALLERIDNUM})
 exten => s,4,MYSQL(Fetch fetchid ${resultid} datavar1 datavar2)
 exten => s,5,GotoIf(${fetchid}?6:8)
@@ -315,6 +315,7 @@ static int aMYSQL_connect(struct ast_channel *chan, char *data)
 		AST_APP_ARG(dbuser);
 		AST_APP_ARG(dbpass);
 		AST_APP_ARG(dbname);
+		AST_APP_ARG(dbcharset);
 	);
 	MYSQL *mysql;
 	int timeout;
@@ -322,7 +323,7 @@ static int aMYSQL_connect(struct ast_channel *chan, char *data)
 
 	AST_NONSTANDARD_APP_ARGS(args, data, ' ');
 
-	if (args.argc != 6) {
+	if (args.argc < 6) {
 		ast_log(LOG_WARNING, "MYSQL_connect is missing some arguments\n");
 		return -1;
 	}
@@ -336,6 +337,14 @@ static int aMYSQL_connect(struct ast_channel *chan, char *data)
 	if (ctimeout && sscanf(ctimeout, "%30d", &timeout) == 1) {
 		mysql_options(mysql, MYSQL_OPT_CONNECT_TIMEOUT, (void *)&timeout);
 	}
+	if(args.dbcharset && strlen(args.dbcharset) > 2){
+		char set_names[255];
+		char statement[512];
+		snprintf(set_names, sizeof(set_names), "SET NAMES %s", args.dbcharset);
+		mysql_real_escape_string(mysql, statement, set_names, sizeof(set_names));
+		mysql_options(mysql, MYSQL_INIT_COMMAND, set_names);
+		mysql_options(mysql, MYSQL_SET_CHARSET_NAME, args.dbcharset);
+	}
 
 	if (! mysql_real_connect(mysql, args.dbhost, args.dbuser, args.dbpass, args.dbname, 0, NULL,
 #ifdef CLIENT_MULTI_STATEMENTS

addons/res_config_mysql.c

@@ -91,6 +91,7 @@ struct mysql_conn {
 	char        user[50];
 	char        pass[50];
 	char        sock[50];
+	char        charset[50];
 	int         port;
 	int         connected;
 	time_t      connect_time;
@@ -1527,6 +1528,10 @@ static int load_mysql_config(struct ast_config *config, const char *category, st
 	} else
 		ast_copy_string(conn->sock, s, sizeof(conn->sock));
 
+	if ((s = ast_variable_retrieve(config, category, "dbcharset"))) {
+		ast_copy_string(conn->charset, s, sizeof(conn->charset));
+	}
+
 	if (!(s = ast_variable_retrieve(config, category, "requirements"))) {
 		ast_log(LOG_WARNING, "MySQL realtime: no requirements setting found, using 'warn' as default.\n");
 		conn->requirements = RQ_WARN;
@@ -1549,6 +1554,8 @@ static int load_mysql_config(struct ast_config *config, const char *category, st
 	ast_debug(1, "MySQL RealTime database name: %s\n", conn->name);
 	ast_debug(1, "MySQL RealTime user: %s\n", conn->user);
 	ast_debug(1, "MySQL RealTime password: %s\n", conn->pass);
+	if(conn->charset)
+		ast_debug(1, "MySQL RealTime charset: %s\n", conn->charset);
 
 	return 1;
 }
@@ -1568,6 +1575,15 @@ reconnect_tryagain:
 			conn->connected = 0;
 			return 0;
 		}
+		if(conn->charset && strlen(conn->charset) > 2){
+			char set_names[255];
+			char statement[512];
+			snprintf(set_names, sizeof(set_names), "SET NAMES %s", conn->charset);
+			mysql_real_escape_string(&conn->handle, statement, set_names, sizeof(set_names));
+			mysql_options(&conn->handle, MYSQL_INIT_COMMAND, set_names);
+			mysql_options(&conn->handle, MYSQL_SET_CHARSET_NAME, conn->charset);
+		}
+
 		if (mysql_real_connect(&conn->handle, conn->host, conn->user, conn->pass, conn->name, conn->port, conn->sock, 0)) {
 #ifdef MYSQL_OPT_RECONNECT
 			/* The default is no longer to automatically reconnect on failure,

configs/res_config_mysql.conf.sample

@@ -4,7 +4,9 @@
 ; The value of dbhost may be either a hostname or an IP address.
 ; If dbhost is commented out or the string "localhost", a connection
 ; to the local host is assumed and dbsock is used instead of TCP/IP
-; to connect to the server.
+; to connect to the server.  If no dbcharset is specified, the connection
+; is made with no extra charset configurations sent to MySQL, leaving all 
+; configured MySQL charset options and defaults untouched.
 ;
 ; Multiple database contexts may be configured, with the caveat that
 ; all context names should be unique and must not contain the slash ('/')
@@ -37,4 +39,5 @@
 ;dbpass = mypass
 ;dbport = 3306
 ;dbsock = /tmp/mysql.sock
+;dbcharset = latin1
 ;requirements=warn ; or createclose or createchar