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-rw-r--r--src/main/java/org/traccar/web/ResponseWrapper.java82
1 files changed, 82 insertions, 0 deletions
diff --git a/src/main/java/org/traccar/web/ResponseWrapper.java b/src/main/java/org/traccar/web/ResponseWrapper.java
new file mode 100644
index 000000000..7c06b67b8
--- /dev/null
+++ b/src/main/java/org/traccar/web/ResponseWrapper.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2023 Anton Tananaev (anton@traccar.org)
+ *
+ * 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.
+ */
+package org.traccar.web;
+
+import javax.servlet.ServletOutputStream;
+import javax.servlet.WriteListener;
+import javax.servlet.http.HttpServletResponse;
+import javax.servlet.http.HttpServletResponseWrapper;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
+public class ResponseWrapper extends HttpServletResponseWrapper {
+
+ private final ByteArrayOutputStream capture;
+ private ServletOutputStream output;
+
+ public ResponseWrapper(HttpServletResponse response) {
+ super(response);
+ capture = new ByteArrayOutputStream(response.getBufferSize());
+ }
+
+ @Override
+ public ServletOutputStream getOutputStream() {
+ if (output == null) {
+ output = new ServletOutputStream() {
+ @Override
+ public boolean isReady() {
+ return true;
+ }
+
+ @Override
+ public void setWriteListener(WriteListener writeListener) {
+ }
+
+ @Override
+ public void write(int b) {
+ capture.write(b);
+ }
+
+ @Override
+ public void flush() throws IOException {
+ capture.flush();
+ }
+
+ @Override
+ public void close() throws IOException {
+ capture.close();
+ }
+ };
+ }
+ return output;
+ }
+
+ @Override
+ public void flushBuffer() throws IOException {
+ super.flushBuffer();
+ if (output != null) {
+ output.flush();
+ }
+ }
+
+ public byte[] getCapture() throws IOException {
+ if (output != null) {
+ output.close();
+ }
+ return capture.toByteArray();
+ }
+
+}