Github user linwen commented on a diff in the pull request:
https://github.com/apache/incubator-hawq/pull/1052#discussion_r93160802
--- Diff: src/backend/libpq/rangerrest.c ---
@@ -0,0 +1,551 @@
+/*
+ * 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.
+ */
+
+/*-------------------------------------------------------------------------
+ *
+ * rangerrest.c
+ * routines to interact with Ranger REST API
+ *
+ *-------------------------------------------------------------------------
+ */
+#include "postgres.h"
+
+#include <json-c/json.h>
+
+#include "utils/acl.h"
+#include "utils/guc.h"
+#include "utils/rangerrest.h"
+
+/*
+ * Internal buffer for libcurl context
+ */
+typedef struct curl_context_t
+{
+ CURL* curl_handle;
+
+ char curl_error_buffer[CURL_ERROR_SIZE];
+
+ int curl_still_running;
+
+ struct
+ {
+ char* buffer;
+ int size;
+ } response;
+
+ char* last_http_reponse;
+} curl_context_t;
+typedef curl_context_t* CURL_HANDLE;
+
+RangerACLResult parse_ranger_response(char* buffer)
+{
+ Assert(buffer != NULL);
+ if (strlen(buffer) == 0)
+ return RANGERCHECK_UNKNOWN;
+
+ elog(LOG, "read from Ranger Restful API: %s", buffer);
+
+ struct json_object *response = json_tokener_parse(buffer);
+ struct json_object *accessObj = json_object_object_get(response,
"access");
+
+ int arraylen = json_object_array_length(accessObj);
+ elog(LOG, "Array Length: %dn",arraylen);
+
+ json_object * jvalue;
+ json_object * jallow;
+ json_bool result;
+ // here should return which table's acl check failed in future.
+ for (int i=0; i< arraylen; i++){
+ jvalue = json_object_array_get_idx(accessObj, i);
+ jallow = json_object_object_get(jvalue, "allowed");
+ result = json_object_get_boolean(jallow);
+ if(result != 1){
+ return RANGERCHECK_NO_PRIV;
+ }
+ }
+ return RANGERCHECK_OK;
+
+}
+
+/*
+ * A mapping from AclObjectKind to string
+ */
+char* AclObjectKindStr[] =
+{
+ "table", /* pg_class */
+ "sequence", /* pg_sequence */
+ "database", /* pg_database */
+ "function", /* pg_proc */
+ "operator", /* pg_operator */
+ "type", /* pg_type */
+ "language", /* pg_language */
+ "namespace", /* pg_namespace */
+ "oplass", /* pg_opclass */
+ "conversion", /* pg_conversion */
+ "tablespace", /* pg_tablespace */
+ "filespace", /* pg_filespace */
+ "filesystem", /* pg_filesystem */
+ "fdw", /* pg_foreign_data_wrapper */
+ "foreign_server", /* pg_foreign_server */
+ "protocol", /* pg_extprotocol */
+ "none" /* MUST BE LAST */
+};
+
+/*
+ * args: List of RangerRequestJsonArgs
+ */
+json_object *create_ranger_request_json_batch(List *args)
+{
+ json_object *juser = NULL;
+ json_object *jaccess = json_object_new_array();
+ json_object *jrequest = json_object_new_object();
+ char *user = NULL;
+ ListCell *arg;
+
+ foreach(arg, args)
+ {
+ RangerRequestJsonArgs *arg_ptr = (RangerRequestJsonArgs *) lfirst(arg);
+ if (user == NULL)
+ {
+ user = arg_ptr->user;
+ juser = json_object_new_string(user);
+ }
+ AclObjectKind kind = arg_ptr->kind;
+ char* object = arg_ptr->object;
+ char* how = arg_ptr->how;
--- End diff --
Yes. We just leave it there, will modify it later.
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