BreakpointUpload, 이는 Java에서 더 안정적입니다. 저는 보통 Flex를 선택합니다. HTML 5에는 Blob 객체(File 객체가 이를 상속함)가 있습니다. 파일을 조각화할 수 있습니다. HTML 5의 File API 및 WebStorage와 함께 세그먼트 중단점 재개에 대한 데모를 만들었습니다. 파일을 작은 조각으로 나눈 후 업로드된 바이트를 LocalStorage. LocalStorage에서 캐시를 지우는 방법은 Chrome - HTML 5 로컬 저장소를 참조하세요. 다음에 업로드가 일시 중지되거나 브라우저가 닫히면 해당 노드에서 업로드가 시작됩니다. 데모 작업을 위해서는 먼저 WS 연결을 설정한 후
파일 업로드
package fileUpload;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.security.MessageDigest;
public class UploadServer {
private int port = 8000;
private ServerSocket serverSocket;
public UploadServer() throws IOException {
serverSocket = new ServerSocket(port);
System.out.println("服务器启动");
}
private void service() {
Socket socket = null;
while (true) {
try {
socket = serverSocket.accept();
Thread workThread = new Thread(new Handler(socket));
workThread.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
class Handler implements Runnable {
private Socket socket;
private boolean hasHandshake = false;
Charset charset = Charset.forName("UTF-8");
private File file = null;
private FileOutputStream fileOut = null;
public Handler(Socket socket) {
this.socket = socket;
}
private PrintWriter getWriter(Socket socket) throws IOException {
OutputStream socketOut = socket.getOutputStream();
return new PrintWriter(socketOut, true);
}
public String echo(String msg) {
return "echo:" + msg;
}
public void run() {
try {
System.out.println("New connection accepted"
+ socket.getInetAddress() + ":" + socket.getPort());
InputStream in = socket.getInputStream();
PrintWriter pw = getWriter(socket);
//读入缓存
byte[] buf = new byte[1024];
//读到字节
int len = in.read(buf, 0, 1024);
//读到字节数组
byte[] res = new byte[len];
System.arraycopy(buf, 0, res, 0, len);
String key = new String(res);
if(!hasHandshake && key.indexOf("Key") > 0){
key = key.substring(0, key.indexOf("==") + 2);
key = key.substring(key.indexOf("Key") + 4, key.length()).trim();
key+= "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(key.getBytes("utf-8"), 0, key.length());
byte[] sha1Hash = md.digest();
sun.misc.BASE64Encoder encoder = new sun.misc.BASE64Encoder();
key = encoder.encode(sha1Hash);
pw.println("HTTP/1.1 101 Switching Protocols");
pw.println("Upgrade: websocket");
pw.println("Connection: Upgrade");
pw.println("Sec-WebSocket-Accept: " + key);
pw.println();
pw.flush();
hasHandshake = true;
//接收数据
byte[] first = new byte[1];
int read = in.read(first, 0, 1);
while(read > 0){
int b = first[0] & 0xFF;
//boolean fin = (b & 0x80) > 0;
// int rsv = (b & 0x70) >>> 4;
byte opCode = (byte) (b & 0x0F);
if(opCode == 8){
socket.getOutputStream().close();
file = null;
fileOut.flush();
fileOut.close();
fileOut = null;
break;
}
b = in.read();
int payloadLength = b & 0x7F;
if (payloadLength == 126) {
byte[] extended = new byte[2];
in.read(extended, 0, 2);
int shift = 0;
payloadLength = 0;
for (int i = extended.length - 1; i >= 0; i--) {
payloadLength = payloadLength + ((extended[i] & 0xFF) << shift);
shift += 8;
}
} else if (payloadLength == 127) {
byte[] extended = new byte[8];
in.read(extended, 0, 8);
int shift = 0;
payloadLength = 0;
for (int i = extended.length - 1; i >= 0; i--) {
payloadLength = payloadLength + ((extended[i] & 0xFF) << shift);
shift += 8;
}
}
//掩码
byte[] mask = new byte[4];
in.read(mask, 0, 4);
int readThisFragment = 1;
ByteBuffer byteBuf = ByteBuffer.allocate(payloadLength);
while(payloadLength > 0){
int masked = in.read();
masked = masked ^ (mask[(int) ((readThisFragment - 1) % 4)] & 0xFF);
byteBuf.put((byte) masked);
payloadLength--;
readThisFragment++;
}
byteBuf.flip();
if(opCode == 1){
getChar(byteBuf.array());
}else
outFile(byteBuf.array());
in.read(first, 0, 1);
}
}
in.close();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (socket != null)
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private void responseClient(boolean finalFragment) throws IOException {
ByteBuffer byteBuf = ByteBuffer.allocate(10);
byteBuf.put("ok".getBytes("UTF-8"));
OutputStream out = socket.getOutputStream();
int first = 0x00;
//是否是输出最后的WebSocket响应片段，默认
if (finalFragment) {
first = first + 0x80;
first = first + 0x1;
}
out.write(first);
if (byteBuf.limit() < 126) {
out.write(byteBuf.limit());
} else if (byteBuf.limit() < 65536) {
out.write(126);
out.write(byteBuf.limit() >>> 8);
out.write(byteBuf.limit() & 0xFF);
} else {
// Will never be more than 2^31-1
out.write(127);
out.write(0);
out.write(0);
out.write(0);
out.write(0);
out.write(byteBuf.limit() >>> 24);
out.write(byteBuf.limit() >>> 16);
out.write(byteBuf.limit() >>> 8);
out.write(byteBuf.limit() & 0xFF);
}
// Write the content
out.write(byteBuf.array(), 0, byteBuf.limit());
out.flush();
}
/**
* 方法说明:
* @开发：linrb
* @创建时间：2012-8-21
* @param array
* @throws IOException
*/
private void getChar(byte[] array) throws IOException {
ByteArrayInputStream byteIn = new ByteArrayInputStream(array);
InputStreamReader reader = new InputStreamReader(byteIn, charset.newDecoder());
int b = 0;
String res = "";
try {
while((b = reader.read()) > 0){
res += (char)b;
}
} catch (IOException e) {
e.printStackTrace();
}
file = new File("C:/" + res);
}
/**
* 方法说明:
* @开发：linrb
* @创建时间：2012-8-14
* @param array
* @throws IOException
*/
private void outFile(byte[] array) throws IOException {
if(fileOut == null){
fileOut = new FileOutputStream(file, true);
}
fileOut.write(array);
responseClient(true);
}
}
public static void main(String[] args) throws IOException {
new UploadServer().service();
}
}위 내용은 HTML5 중단점 이력서 업로드 샘플 코드 공유의 상세 내용입니다. 자세한 내용은 PHP 중국어 웹사이트의 기타 관련 기사를 참조하세요!
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