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101 lines
3.2 KiB
101 lines
3.2 KiB
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.arialyy.aria.http;
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import com.arialyy.aria.util.ALog;
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import java.io.DataInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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// Data is expected to be a series of data chunks in the form <chunk size><chunk bytes><chunk size><chunk bytes>
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// The final data chunk should be a 0-length chunk which will indicate end of input.
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@Deprecated
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public class ChunkedInputStream extends InputStream {
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private static final String TAG = "ChunkedInputStream";
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private DataInputStream din;
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private int unreadBytes = 0; // Bytes remaining in the current chunk of data
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private byte[] singleByte = new byte[1];
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private boolean endOfData = false;
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private String id;
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public ChunkedInputStream(InputStream in, String id) {
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din = new DataInputStream(in);
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this.id = id;
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ALog.d(TAG, String.format("Creating chunked input for %s", id));
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}
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@Override
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public void close() throws IOException {
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ALog.d(TAG, String.format("%s: Closing chunked input.", id));
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din.close();
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}
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@Override
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public int read() throws IOException {
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int bytesRead = read(singleByte, 0, 1);
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return (bytesRead == -1) ? -1 : (int) singleByte[0];
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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int bytesRead = 0;
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if (len < 0) {
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throw new IllegalArgumentException(id + ": Negative read length");
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} else if (len == 0) {
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return 0;
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}
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// If there is a current unread chunk, read from that, or else get the next chunk.
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if (unreadBytes == 0) {
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try {
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// Find the next chunk size
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unreadBytes = din.readInt();
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if (ALog.DEBUG) {
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ALog.d(TAG, String.format("%s: Chunk size %s", id, unreadBytes));
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}
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if (unreadBytes == 0) {
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ALog.d(TAG, String.format("%s: Hit end of data", id));
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endOfData = true;
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return -1;
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}
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} catch (IOException err) {
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throw new IOException(id + ": Error while attempting to read chunk length", err);
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}
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}
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int bytesToRead = Math.min(len, unreadBytes);
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try {
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din.readFully(b, off, bytesToRead);
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} catch (IOException err) {
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throw new IOException(
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id + ": Error while attempting to read " + bytesToRead + " bytes from current chunk",
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err);
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}
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unreadBytes -= bytesToRead;
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bytesRead += bytesToRead;
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return bytesRead;
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}
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public boolean isEndOfData() {
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return endOfData;
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}
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} |