如何在ssh上测试客户端和服务器程序?
我有两个程序,我希望他们连接到我的学校服务器afs1.njit.edu,但它永远不会连接。那是我拥有这些文件的地方。我应该运行两个ssh程序来运行不同的程序吗?不确定如何测试它们。 (这些是我在编写代码之前想要测试的来自在线的一个简单例子)我将它们编译为serperately并且它们从不连接。如何在ssh上测试客户端和服务器程序?
singleSocketserver.java
public static void main(String[] args) {
try{
socket1 = new ServerSocket(port);
System.out.println("SingleSocketServer Initialized");
int character;
while (true) {
connection = socket1.accept();
BufferedInputStream is = new BufferedInputStream(connection.getInputStream());
InputStreamReader isr = new InputStreamReader(is);
process = new StringBuffer();
while((character = isr.read()) != 13) {
process.append((char)character);
}
System.out.println(process);
//need to wait 10 seconds for the app to update database
try {
Thread.sleep(10000);
}
catch (Exception e){}
TimeStamp = new java.util.Date().toString();
String returnCode = "SingleSocketServer repsonded at "+ TimeStamp + (char) 13;
BufferedOutputStream os = new BufferedOutputStream(connection.getOutputStream());
OutputStreamWriter osw = new OutputStreamWriter(os, "US-ASCII");
osw.write(returnCode);
osw.flush();
}
}
catch (IOException e) {}
try {
connection.close();
}
catch (IOException e) {}
}
}
SocketClient.java
public class SocketClient {
public static void main(String[] args) {
/** Define a host server */
String host = "afs1.njit.edu";
/** Define a port */
int port = 19999;
StringBuffer instr = new StringBuffer();
String TimeStamp;
System.out.println("SocketClient initialized");
try {
/** Obtain an address object of the server */
InetAddress address = InetAddress.getByName(host);
/** Establish a socket connetion */
Socket connection = new Socket(address, port);
/** Instantiate a BufferedOutputStream object */
BufferedOutputStream bos = new BufferedOutputStream(connection.
getOutputStream());
/** Instantiate an OutputStreamWriter object with the optional character
* encoding.
*/
OutputStreamWriter osw = new OutputStreamWriter(bos, "US-ASCII");
TimeStamp = new java.util.Date().toString();
String process = "Calling the Socket Server on "+ host + " port " + port +
" at " + TimeStamp + (char) 13;
/** Write across the socket connection and flush the buffer */
osw.write(process);
osw.flush();
/** Instantiate a BufferedInputStream object for reading
/** Instantiate a BufferedInputStream object for reading
* incoming socket streams.
*/
BufferedInputStream bis = new BufferedInputStream(connection.
getInputStream());
/**Instantiate an InputStreamReader with the optional
* character encoding.
*/
InputStreamReader isr = new InputStreamReader(bis, "US-ASCII");
/**Read the socket's InputStream and append to a StringBuffer */
int c;
while ((c = isr.read()) != 13)
instr.append((char) c);
/** Close the socket connection. */
connection.close();
System.out.println(instr);
}
catch (IOException f) {
System.out.println("IOException: " + f);
}
catch (Exception g) {
System.out.println("Exception: " + g);
}
}
}
,如果你想从你家连接到学校的计算机,那么你可能会打一个防火墙。通常,虽然并非总是如此,但允许从机器发起的连接,但只能在某些端口上连接到机器。你可以设置你的ssh来隧道传输数据包,但是你也可以运行两个程序。
如果运行在同一台机器上的两个程序,他们应该找到彼此,假设: 1:你被允许打开插座 2:插座是不是已经采取anothe程序 3:防火墙不会阻止这些端口。
要在学校机器上运行,你可以使用2个shell(ssh),但这不是必须的。您可以在后台运行接收器(在命令末尾放置一个&),然后运行发件人。但是运行2个shell比较容易,特别是如果程序像你一样发送到sysout。
几个指针,如果你使用System.out(或System.err)进行调试/日志输出,当你消耗一个异常时,如果你不想拉动,我推荐e.printStackTrace(System.out)在这个库中。大多数日志记录框架都有一个logger.error(“message”,ex),commons.lang也有一个异常打印机。
How can I convert a stack trace to a string?
有一两件事可以做,以测试你的逻辑,没有socket连接,是使用的PipedInputStream和的PipedOutputStream。 http://docs.oracle.com/javase/7/docs/api/java/io/PipedInputStream.html但是如果你确定你的逻辑并且需要测试套接字,你就必须并排运行它们。
就是这样,2个相同的服务器谢谢你 – 2014-10-20 14:44:05