[IOTDB-2458] Grafana REST API: add login method (#4923)

grafana-plugin/src/datasource.ts

@@ -141,7 +141,7 @@ export class DataSource extends DataSourceApi<IoTDBQuery, IoTDBOptions> {
     const Authorization = 'Basic ' + Buffer.from(this.username + ':' + this.password).toString('base64');
     myHeader.append('Authorization', Authorization);
     const response = getBackendSrv().datasourceRequest({
-      url: this.url + '/ping',
+      url: this.url + '/grafana/v1/login',
       method: 'GET',
       headers: myHeader,
     });

openapi/src/main/openapi3/iotdb-rest.yaml

@@ -95,6 +95,17 @@ paths:
               schema:
                 $ref: '#/components/schemas/QueryDataSet'
 
+  /grafana/v1/login:
+    get:
+      responses:
+        "200":
+          description: ExecutionStatus
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ExecutionStatus'
+      operationId: login
+
   /grafana/v1/query/expression:
     post:
       summary: expression

server/src/main/java/org/apache/iotdb/db/protocol/rest/impl/GrafanaApiServiceImpl.java

@@ -174,4 +174,14 @@ public class GrafanaApiServiceImpl extends GrafanaApiService {
       return Response.ok().entity(ExceptionHandler.tryCatchException(e)).build();
     }
   }
+
+  @Override
+  public Response login(SecurityContext securityContext) throws NotFoundException {
+    return Response.ok()
+        .entity(
+            new ExecutionStatus()
+                .code(TSStatusCode.SUCCESS_STATUS.getStatusCode())
+                .message(TSStatusCode.SUCCESS_STATUS.name()))
+        .build();
+  }
 }

server/src/test/java/org/apache/iotdb/db/protocol/rest/GrafanaApiServiceIT.java

@@ -25,6 +25,7 @@ import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import org.apache.http.HttpEntity;
 import org.apache.http.client.methods.CloseableHttpResponse;
+import org.apache.http.client.methods.HttpGet;
 import org.apache.http.client.methods.HttpPost;
 import org.apache.http.entity.StringEntity;
 import org.apache.http.impl.client.CloseableHttpClient;
@@ -70,6 +71,37 @@ public class GrafanaApiServiceIT {
     return httpPost;
   }
 
+  @Test
+  public void login() {
+    CloseableHttpClient httpClient = HttpClientBuilder.create().build();
+    HttpGet httpGet = new HttpGet("http://127.0.0.1:18080/grafana/v1/login");
+    CloseableHttpResponse response = null;
+    try {
+      String authorization = getAuthorization("root", "root");
+      httpGet.setHeader("Authorization", authorization);
+      response = httpClient.execute(httpGet);
+      HttpEntity responseEntity = response.getEntity();
+      String message = EntityUtils.toString(responseEntity, "utf-8");
+      JsonObject result = JsonParser.parseString(message).getAsJsonObject();
+      assertEquals(200, Integer.parseInt(result.get("code").toString()));
+    } catch (IOException e) {
+      e.printStackTrace();
+      fail(e.getMessage());
+    } finally {
+      try {
+        if (httpClient != null) {
+          httpClient.close();
+        }
+        if (response != null) {
+          response.close();
+        }
+      } catch (IOException e) {
+        e.printStackTrace();
+        fail(e.getMessage());
+      }
+    }
+  }
+
   public void rightInsertTablet(CloseableHttpClient httpClient) {
     CloseableHttpResponse response = null;
     try {