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java/org/apache/coyote/http2/Http2OutputBuffer.java

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+/*
+ *  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.
+ */
+package org.apache.coyote.http2;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import org.apache.coyote.Response;
+import org.apache.coyote.http11.HttpOutputBuffer;
+import org.apache.coyote.http11.OutputFilter;
+import org.apache.coyote.http2.Stream.StreamOutputBuffer;
+import org.apache.tomcat.util.buf.ByteChunk;
+
+public class Http2OutputBuffer implements HttpOutputBuffer {
+
+    private final Response coyoteResponse;
+    private HttpOutputBuffer next;
+
+
+    /**
+     * Add a filter at the start of the existing processing chain. Subsequent
+     * calls to the {@link HttpOutputBuffer} methods of this object will be
+     * passed to the filter. If appropriate, the filter will then call the same
+     * method on the next HttpOutputBuffer in the chain until the call reaches
+     * the StreamOutputBuffer.
+     *
+     * @param filter    The filter to add to the start of the processing chain
+     */
+    public void addFilter(OutputFilter filter) {
+        filter.setBuffer(next);
+        next = filter;
+    }
+
+
+    public Http2OutputBuffer(Response coyoteResponse, StreamOutputBuffer streamOutputBuffer) {
+        this.coyoteResponse = coyoteResponse;
+        this.next = streamOutputBuffer;
+    }
+
+
+    @Override
+    public int doWrite(ByteBuffer chunk) throws IOException {
+        if (!coyoteResponse.isCommitted()) {
+            coyoteResponse.sendHeaders();
+        }
+        return next.doWrite(chunk);
+    }
+
+
+    @Override
+    public long getBytesWritten() {
+        return next.getBytesWritten();
+    }
+
+
+    @Override
+    public void end() throws IOException {
+        next.end();
+    }
+
+
+    @Override
+    public void flush() throws IOException {
+        next.flush();
+    }
+
+
+    @Override
+    @Deprecated
+    public int doWrite(ByteChunk chunk) throws IOException {
+        return next.doWrite(chunk);
+    }
+}