[TD-5992] add set config interface for connector

src/client/src/tscSql.c

@@ -50,10 +50,6 @@ static bool validPassword(const char* passwd) {
   return validImpl(passwd, TSDB_KEY_LEN - 1);
 }
 
-int   taos_set_config(const char *config){
-
-}
-
 static SSqlObj *taosConnectImpl(const char *ip, const char *user, const char *pass, const char *auth, const char *db,
                          uint16_t port, void (*fp)(void *, TAOS_RES *, int), void *param, TAOS **taos) {
   if (taos_init()) {

src/client/tests/cliTest.cpp

@@ -262,6 +262,8 @@ TEST(testCase, result_field_test) {
   taos_options(TSDB_OPTION_CONFIGDIR, "~/first/cfg");
   taos_init();
 
+  char *config = "{\"tempDir\":\"/root/tmp/\",\"sercerPort\":\"3333\"}";
+  taos_set_config(config);
   validateResultFields();
   stmtInsertTest();
 }

src/util/src/tconfig.c

@@ -561,3 +561,35 @@ void taosDumpGlobalCfg() {
     taosDumpCfg(cfg);
   }
 }
+
+
+#include "cJSON.h"
+static pthread_mutex_t setConfMutex = PTHREAD_MUTEX_INITIALIZER;
+static bool setConfFlag = false;
+int taos_set_config(const char *config){
+  if(taos_init() == false){
+    uError("failed to call taos_init");
+    return -1;
+  }
+
+  pthread_mutex_lock(&setConfMutex);
+
+  if (setConfFlag) return;
+  cJSON *root = cJSON_Parse(config);
+  if (root == NULL) {
+    uError("failed to set config, invalid json format: %s", config);
+    return -1;
+  }
+
+  int size = cJSON_GetArraySize(root);
+  for(int i = 0; i < size; i++){
+    cJSON *item = cJSON_GetArrayItem(root, i);
+    if (!item) {
+      uError("failed to read index:%d", i);
+      continue;
+    }
+    taosReadConfigOption(item->string, item->valuestring, NULL, NULL);
+  }
+  setConfFlag = true;
+  pthread_mutex_unlock(&setConfMutex);
+}