| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http.impl.nio; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.channels.ReadableByteChannel; |
| import java.nio.channels.WritableByteChannel; |
| import java.nio.charset.CharacterCodingException; |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetEncoder; |
| import java.nio.charset.CoderResult; |
| |
| import org.apache.hc.core5.http.Chars; |
| import org.apache.hc.core5.http.nio.SessionOutputBuffer; |
| import org.apache.hc.core5.util.Args; |
| import org.apache.hc.core5.util.CharArrayBuffer; |
| |
| class SessionOutputBufferImpl extends ExpandableBuffer implements SessionOutputBuffer { |
| |
| private static final byte[] CRLF = new byte[] {Chars.CR, Chars.LF}; |
| |
| private final CharsetEncoder charEncoder; |
| private final int lineBuffersize; |
| |
| private CharBuffer charbuffer; |
| |
| /** |
| * Creates SessionOutputBufferImpl instance. |
| * |
| * @param bufferSize input buffer size |
| * @param lineBuffersize buffer size for line operations. Has effect only if |
| * {@code charEncoder} is not {@code null}. |
| * @param charEncoder charEncoder to be used for encoding HTTP protocol elements. |
| * If {@code null} simple type cast will be used for char to byte conversion. |
| * |
| * @since 4.3 |
| */ |
| public SessionOutputBufferImpl( |
| final int bufferSize, |
| final int lineBuffersize, |
| final CharsetEncoder charEncoder) { |
| super(bufferSize); |
| this.lineBuffersize = Args.positive(lineBuffersize, "Line buffer size"); |
| this.charEncoder = charEncoder; |
| } |
| |
| /** |
| * @since 4.3 |
| */ |
| public SessionOutputBufferImpl( |
| final int bufferSize, |
| final int lineBufferSize, |
| final Charset charset) { |
| this(bufferSize, lineBufferSize, charset != null ? charset.newEncoder() : null); |
| } |
| |
| /** |
| * @since 4.3 |
| */ |
| public SessionOutputBufferImpl( |
| final int bufferSize, |
| final int lineBufferSize) { |
| this(bufferSize, lineBufferSize, (CharsetEncoder) null); |
| } |
| |
| /** |
| * @since 4.3 |
| */ |
| public SessionOutputBufferImpl(final int bufferSize) { |
| this(bufferSize, 256); |
| } |
| |
| @Override |
| public int length() { |
| return super.length(); |
| } |
| |
| @Override |
| public boolean hasData() { |
| return super.hasData(); |
| } |
| |
| @Override |
| public int capacity() { |
| return super.capacity(); |
| } |
| |
| @Override |
| public int flush(final WritableByteChannel channel) throws IOException { |
| Args.notNull(channel, "Channel"); |
| setOutputMode(); |
| return channel.write(buffer()); |
| } |
| |
| @Override |
| public void write(final ByteBuffer src) { |
| if (src == null) { |
| return; |
| } |
| setInputMode(); |
| ensureAdjustedCapacity(buffer().position() + src.remaining()); |
| buffer().put(src); |
| } |
| |
| @Override |
| public void write(final ReadableByteChannel src) throws IOException { |
| if (src == null) { |
| return; |
| } |
| setInputMode(); |
| src.read(buffer()); |
| } |
| |
| private void write(final byte[] b) { |
| if (b == null) { |
| return; |
| } |
| setInputMode(); |
| final int off = 0; |
| final int len = b.length; |
| final int requiredCapacity = buffer().position() + len; |
| ensureAdjustedCapacity(requiredCapacity); |
| buffer().put(b, off, len); |
| } |
| |
| private void writeCRLF() { |
| write(CRLF); |
| } |
| |
| @Override |
| public void writeLine(final CharArrayBuffer lineBuffer) throws CharacterCodingException { |
| if (lineBuffer == null) { |
| return; |
| } |
| setInputMode(); |
| // Do not bother if the buffer is empty |
| if (lineBuffer.length() > 0 ) { |
| if (this.charEncoder == null) { |
| final int requiredCapacity = buffer().position() + lineBuffer.length(); |
| ensureCapacity(requiredCapacity); |
| if (buffer().hasArray()) { |
| final byte[] b = buffer().array(); |
| final int len = lineBuffer.length(); |
| final int off = buffer().position(); |
| final int arrayOffset = buffer().arrayOffset(); |
| for (int i = 0; i < len; i++) { |
| b[arrayOffset + off + i] = (byte) lineBuffer.charAt(i); |
| } |
| buffer().position(off + len); |
| } else { |
| for (int i = 0; i < lineBuffer.length(); i++) { |
| buffer().put((byte) lineBuffer.charAt(i)); |
| } |
| } |
| } else { |
| if (this.charbuffer == null) { |
| this.charbuffer = CharBuffer.allocate(this.lineBuffersize); |
| } |
| this.charEncoder.reset(); |
| // transfer the string in small chunks |
| int remaining = lineBuffer.length(); |
| int offset = 0; |
| while (remaining > 0) { |
| int l = this.charbuffer.remaining(); |
| boolean eol = false; |
| if (remaining <= l) { |
| l = remaining; |
| // terminate the encoding process |
| eol = true; |
| } |
| this.charbuffer.put(lineBuffer.array(), offset, l); |
| this.charbuffer.flip(); |
| |
| boolean retry = true; |
| while (retry) { |
| final CoderResult result = this.charEncoder.encode(this.charbuffer, buffer(), eol); |
| if (result.isError()) { |
| result.throwException(); |
| } |
| if (result.isOverflow()) { |
| expand(); |
| } |
| retry = !result.isUnderflow(); |
| } |
| this.charbuffer.compact(); |
| offset += l; |
| remaining -= l; |
| } |
| // flush the encoder |
| boolean retry = true; |
| while (retry) { |
| final CoderResult result = this.charEncoder.flush(buffer()); |
| if (result.isError()) { |
| result.throwException(); |
| } |
| if (result.isOverflow()) { |
| expand(); |
| } |
| retry = !result.isUnderflow(); |
| } |
| } |
| } |
| writeCRLF(); |
| } |
| |
| } |