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SocketIO.java
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398 lines (318 loc) · 7.82 KB
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package atChat;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
public class SocketIO {
private final int buffer;
private ByteBuffer intBytes = ByteBuffer.allocate(4);
private ByteBuffer mBytes;
private int intCount = 0;
private int mCount = 0;
private int mSize = 0;
private long fileSize = 0;
private long currentFileSize = 0;
private int lastWritten = 0;
private ByteBuffer fileBuffer;
public SocketIO(int buffer) {
this.buffer = buffer;
fileBuffer = ByteBuffer.allocate(buffer);
}
public SocketIO() {
buffer = 1024 * 8;
fileBuffer = ByteBuffer.allocate(buffer);
}
public String readBytes(final SocketChannel s, final Crypt crypt) throws IOException {
int bytesRead = 0;
if (mSize == 0) {
do {
bytesRead = s.read(intBytes);
intCount += (bytesRead > -1) ? bytesRead : 0;
if (intCount >= 4) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
intCount = 0;
intBytes = ByteBuffer.allocate(4);
return "\n";
}
if (intCount == 4) {
intBytes.flip();
mSize = intBytes.getInt();
mBytes = ByteBuffer.allocate(mSize);
intBytes.clear();
intCount = 0;
bytesRead = 0;
do {
bytesRead = s.read(mBytes);
mCount += (bytesRead > -1) ? bytesRead : 0;
if (mCount >= mSize) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
mBytes = null;
mCount = 0;
mSize = 0;
return "\n";
}
if (mCount == mSize) {
mBytes.flip();
String msg = crypt.decrypt(mBytes.array());
mBytes = null;
mCount = 0;
mSize = 0;
return msg;
}
}
} else {
do {
bytesRead = s.read(mBytes);
mCount += (bytesRead > -1) ? bytesRead : 0;
if (mCount >= mSize) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
mBytes = null;
mCount = 0;
mSize = 0;
return "\n";
}
if (mCount == mSize) {
mBytes.flip();
String msg = crypt.decrypt(mBytes.array());
mBytes = null;
mCount = 0;
mSize = 0;
return msg;
}
}
return null;
}
public byte[] readBytesB(final SocketChannel s, final Crypt crypt) throws IOException {
int bytesRead = 0;
if (mSize == 0) {
do {
bytesRead = s.read(intBytes);
intCount += (bytesRead > -1) ? bytesRead : 0;
if (intCount >= 4) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
intCount = 0;
intBytes = ByteBuffer.allocate(4);
return new byte[0];
}
if (intCount == 4) {
intBytes.flip();
mSize = intBytes.getInt();
mBytes = ByteBuffer.allocate(mSize);
intBytes.clear();
intCount = 0;
bytesRead = 0;
do {
bytesRead = s.read(mBytes);
mCount += (bytesRead > -1) ? bytesRead : 0;
if (mCount >= mSize) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
mBytes = null;
mCount = 0;
mSize = 0;
return new byte[0];
}
if (mCount == mSize) {
mBytes.flip();
byte[] dBytes = crypt.decryptBytes(mBytes.array());
mBytes = null;
mCount = 0;
mSize = 0;
return dBytes;
}
}
} else {
do {
bytesRead = s.read(mBytes);
mCount += (bytesRead > -1) ? bytesRead : 0;
if (mCount >= mSize) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
mBytes = null;
mCount = 0;
mSize = 0;
return new byte[0];
}
if (mCount == mSize) {
mBytes.flip();
byte[] dBytes = crypt.decryptBytes(mBytes.array());
mBytes = null;
mCount = 0;
mSize = 0;
return dBytes;
}
}
return null;
}
public byte[] readBytes(final SocketChannel s) throws IOException {
int bytesRead = 0;
if (mSize == 0) {
do {
bytesRead = s.read(intBytes);
intCount += (bytesRead > -1) ? bytesRead : 0;
if (intCount >= 4) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
intCount = 0;
intBytes = ByteBuffer.allocate(4);
return new byte[0];
}
if (intCount == 4) {
intBytes.flip();
mSize = intBytes.getInt();
mBytes = ByteBuffer.allocate(mSize);
intBytes.clear();
intCount = 0;
bytesRead = 0;
do {
bytesRead = s.read(mBytes);
mCount += (bytesRead > -1) ? bytesRead : 0;
if (mCount >= mSize) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
mBytes = null;
mCount = 0;
mSize = 0;
return new byte[0];
}
if (mCount == mSize) {
mBytes.flip();
byte[] a = mBytes.array();
mBytes = null;
mCount = 0;
mSize = 0;
return a;
}
}
} else {
do {
bytesRead = s.read(mBytes);
mCount += (bytesRead > -1) ? bytesRead : 0;
if (mCount >= mSize) {
break;
}
} while (bytesRead > 0);
if (bytesRead == -1) {
mBytes = null;
mCount = 0;
mSize = 0;
return new byte[0];
}
if (mCount == mSize) {
mBytes.flip();
byte[] a = mBytes.array();
mBytes = null;
mCount = 0;
mSize = 0;
return a;
}
}
return null;
}
public void writeBytes(final SocketChannel s, final String text, final Crypt crypt) throws IOException {
byte[] bytes = crypt.encrypt(text);
if (bytes != null) {
ByteBuffer b = ByteBuffer.allocate(bytes.length + 4);
b.putInt(bytes.length);
b.put(bytes);
b.flip();
while (b.hasRemaining()) {
s.write(b);
}
}
}
public void writeBytes(final SocketChannel s, final byte[] bytesToSend, final Crypt crypt) throws IOException {
byte[] bytes = crypt.encrypt(bytesToSend);
if (bytes != null) {
ByteBuffer b = ByteBuffer.allocate(bytes.length + 4);
b.putInt(bytes.length);
b.put(bytes);
b.flip();
while (b.hasRemaining()) {
s.write(b);
}
}
}
public void writeBytes(final SocketChannel s, final byte[] bytes) throws IOException {
ByteBuffer b = ByteBuffer.allocate(bytes.length + 4);
b.putInt(bytes.length);
b.put(bytes);
b.flip();
while (b.hasRemaining()) {
s.write(b);
}
}
protected void resetFileWriter() {
fileSize = 0;
currentFileSize = 0;
lastWritten = 0;
}
protected void setFileWriter(final long fileSize) {
this.fileSize = fileSize;
currentFileSize = 0;
lastWritten = 0;
}
public long getCurrentLength() {
return currentFileSize;
}
public int getLastWriteAmount() {
return lastWritten;
}
protected boolean readFile(final SocketChannel s, final BufferedOutputStream out) throws IOException {
int n = -1;
if ((n = s.read(fileBuffer)) != -1) {
if (n > 0) {
out.write(fileBuffer.array(), 0, n);
out.flush();
fileBuffer.clear();
}
lastWritten = n;
currentFileSize += n;
if (currentFileSize >= fileSize) {
resetFileWriter();
return true;
}
} else {
lastWritten = 0;
}
return false;
}
protected int writeFile(final SocketChannel s, final BufferedInputStream in) throws IOException {
byte[] buffer = new byte[this.buffer]; //8192
int n = -1;
if ((n = in.read(buffer)) != -1) {
fileBuffer.put(buffer, 0, n);
fileBuffer.flip();
while(fileBuffer.hasRemaining()) {
s.write(fileBuffer);
}
if (n > 0) {
fileBuffer.clear();
}
return n;
} else {
return -1;
}
}
}