--- /dev/null
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed 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 <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/security/util/json_util.h"
+
+#include <string.h>
+
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+const char* grpc_json_get_string_property(const grpc_json* json,
+ const char* prop_name,
+ grpc_error** error) {
+ grpc_json* child = nullptr;
+ if (error != nullptr) *error = GRPC_ERROR_NONE;
+ for (child = json->child; child != nullptr; child = child->next) {
+ if (child->key == nullptr) {
+ if (error != nullptr) {
+ *error = GRPC_ERROR_CREATE_FROM_STATIC_STRING(
+ "Invalid (null) JSON key encountered");
+ }
+ return nullptr;
+ }
+ if (strcmp(child->key, prop_name) == 0) break;
+ }
+ if (child == nullptr || child->type != GRPC_JSON_STRING) {
+ if (error != nullptr) {
+ char* error_msg;
+ gpr_asprintf(&error_msg, "Invalid or missing %s property.", prop_name);
+ *error = GRPC_ERROR_CREATE_FROM_COPIED_STRING(error_msg);
+ gpr_free(error_msg);
+ }
+ return nullptr;
+ }
+ return child->value;
+}
+
+bool grpc_copy_json_string_property(const grpc_json* json,
+ const char* prop_name,
+ char** copied_value) {
+ grpc_error* error = GRPC_ERROR_NONE;
+ const char* prop_value =
+ grpc_json_get_string_property(json, prop_name, &error);
+ GRPC_LOG_IF_ERROR("Could not copy JSON property", error);
+ if (prop_value == nullptr) return false;
+ *copied_value = gpr_strdup(prop_value);
+ return true;
+}