我有一个案例,客户端在与服务器建立连接后,收到一个文件,并且当使用相同的连接时(持久)我最终得到上面提到的这个错误。 以下是实施的代码:
Scanner in = new Scanner(file);
this.clientSocket = new Socket(this.host,this.port);
this.os = new DataOutputStream(this.clientSocket.getOutputStream());
this.is = this.clientSocket.getInputStream();
while(in.hasNextLine()){
newFile = in.nextLine();
System.out.println(newFile);
this.os.writeBytes(newFile + '\n');
this.os.flush();
scanFileList();
writeFile();
}
,服务器端实现是:
final class HttpRequest implements Runnable {
final static String CRLF = "\r\n";
Socket socket;
static String dir;
BufferedOutputStream outToClient = null;
// Constructor
public HttpRequest(Socket socket) throws Exception {
this.socket = socket;
dir = "C:\\Users\\";
}
// Implement the run() method of the Runnable interface.
public void run() {
try {
// Get a reference to the socket's input and output streams.
InputStream is = socket.getInputStream();
outToClient = new BufferedOutputStream(socket.getOutputStream());
processRequest(is,outToClient);
} catch (Exception e) {
System.out.println(e);
}
}
private void processRequest(InputStream is,BufferedOutputStream os) throws Exception {
// Set up input stream filters.
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// Get the request line of the HTTP request message.
String fileName = br.readLine();
// Prepend a "." so that file request is within the current directory.
System.out.println(fileName);
// Open the requested file.
File myFile = null ;
boolean fileExists = true ;
myFile = new File(dir + fileName);
FileInputStream fis = null ;
try {
fis = new FileInputStream(dir + fileName);
System.out.println(fis);
} catch (FileNotFoundException e) {
fileExists = false ;
}
// Debug info for private use
System.out.println("Incoming!!!");
// Send the entity body.
if (fileExists) {
sendBytes(myFile, os);
//fis.close();
}
// Close streams and socket.
is.close();
os.close();
br.close();
socket.close();
}
private static void sendBytes(File myFile,
BufferedOutputStream os) throws Exception {
// Construct a 1K buffer to hold bytes on their way to the socket.
byte[] mybytearray = new byte[(int) myFile.length()];
FileInputStream fis = null;
// Copy requested file into the socket's output stream.
try {
fis = new FileInputStream(myFile);
} catch (FileNotFoundException ex) {
// Do exception handling
}
BufferedInputStream bis = new BufferedInputStream(fis);
try {
bis.read(mybytearray, 0, mybytearray.length);
os.write(mybytearray, 0, mybytearray.length);
os.flush();
// File sent, exit the main method
return;
} catch (IOException ex) {
// Do exception handling
}
}
}
当客户端程序尝试通过以下方式写入服务器时发生错误:this.os.writebytes(newFile + / n);
Testfile01.bmp
writing
saved
Testfile02.bmp
Exception in thread "main" java.net.SocketException: Socket closed
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.DataOutputStream.writeBytes(Unknown Source)
at TCPClientPersistentNp.openSocket(TCPClientPersistentNp.java:53)
at TCPClient.main(TCPClient.java:66)
答案 0 :(得分:2)
你在代码中做了什么?
is.close();
os.close();
br.close();
socket.close();
您在处理每个请求后明确关闭所有内容吗?你说,这就是持久性连接实现?
答案 1 :(得分:2)
我不打算详细阅读你的代码(见上面的评论......),但显然有一些非常奇怪/错误。
简单地说,如果你打算与基于HTTP的服务器交谈,你不能只打开一个套接字并写东西。您的客户端必须创建格式正确的HTTP请求,并处理返回的HTTP响应。
客户端的异常正在发生,因为服务器端......实际上你的代码......已经关闭了另一端的连接。