我的高级项目有些问题。我的目标是阅读并修改http响应数据包。但我有一些问题java.net.SocketException请帮助我
Responsethread的异常
java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:113)
at java.net.SocketOutputStream.write(SocketOutputStream.java:147)
at helper.ResponseThread.run(ResponseThread.java:163)
BUILD STOPPED (total time: 4 minutes 3 seconds)
这是我的代码
Helper.java
package helper;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.ServerSocket;
import java.net.Socket;
public class Helper {
public void proc() {
try {
ServerSocket servsock = new ServerSocket(80);
String hostname="www.hungeng.besaba.com";
InetAddress ip=InetAddress.getByName(hostname);
//int serverPort=3456;
//Socket clientSocket =new Socket(ip,serverPort);
//String ipAddr="31.170.164.70"; //http://hungeng.besaba.com/
while (true) {
Socket sockC = servsock.accept();
//get input stream of the Socket(sockC) from Client
InputStream inC = sockC.getInputStream();
//get output stream of the Socket(sockC) to Client
OutputStream outC = sockC.getOutputStream();
//Connect to the specified server(ipAddr) at the 80 port.
Socket sockS = new Socket(ip, 80);
//get input stream of the Socket(sockS) from server(ipAddr)
InputStream inS = sockS.getInputStream();
//get output stream of the Socket(sockS) to server(ipAddr)
OutputStream outS = sockS.getOutputStream();
//Create Thread for sending The Request Message from Client
RequestThread request = new RequestThread();
//Create Thread for sending The Response Message to Client
ResponseThread response = new ResponseThread();
// match a Request Thread with a Response Thread
request.server = response;
response.client = request;
request.is = inC;
request.os = outC;
response.is = inS;
response.os = outS;
request.start();
response.start();
}
} catch (Exception x) {
x.printStackTrace();
}
}
public static void main(String[] args) {
// TODO code application logic here
new Helper().proc();
}
}
RequestRhread.java
package helper;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
public class RequestThread extends Thread {
InputStream is;
OutputStream os;
ResponseThread server;
byte[] buf = new byte[1024];
int bytesRead;
public void run() {
try {
int i=0;
while ((bytesRead = is.read(buf)) !=-1) {
server.os.write(buf,0,bytesRead);
server.os.flush();
}
} catch (Exception x) {
x.printStackTrace();
}
}
}
ResponseThread.java
package helper;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
public class ResponseThread extends Thread {
int num;
String content = "";
InputStream is;
OutputStream os;
RequestThread client;
byte[] buf = new byte[20000];
int bytesRead = 0;
String endMark = "\r\n\r\n";
public void run() {
try {
String msg = "";
while ((bytesRead = is.read(buf)) != -1) {
msg += new String(buf, 0, bytesRead);
// System.out.println("message");
//System.out.println(msg);
// System.out.println("---------");
//client.os.write(buf, 0, bytesRead);
int eHeader = msg.indexOf("\r\n\r\n");
String header = msg.substring(0, eHeader + "\r\n\r\n".length());
// System.out.println("header");
//System.out.println(header);
//System.out.println("-----------");
int sConLength = header.indexOf("Content-Length: ");
if (sConLength != -1) {
//have content length
String temp = header.substring(sConLength);
int eConLength = temp.indexOf("\r\n");
int cl = Integer.parseInt(temp.substring("Content-Length: ".length(), eConLength));
String uConlen = header.substring(0, sConLength + "Content-Length: ".length());
System.out.println("uconlen ");
System.out.println(uConlen);
System.out.println("--------");
String lConlen = temp.substring(eConLength + "\r\n".length());
System.out.println("lconlen ");
System.out.println(lConlen);
System.out.println("-----------------");
int sHtml = msg.toLowerCase().indexOf("<html>");
int eHtml = msg.toLowerCase().indexOf("</html>");
if ((sHtml != -1) && (eHtml != -1)) {
//has Html content
System.out.println(":::Have Html content:::");
int sForm = msg.toLowerCase().indexOf("<form");
int eForm = msg.toLowerCase().indexOf("</form>");
if ((sForm != -1) && (eForm != -1)) {
//have form
System.out.println(":::Have form:::");
String form = msg.substring(sForm, eForm + "</form>".length());
String uForm = msg.substring(eHeader + "\r\n\r\n".length(), sForm);
String lForm = msg.substring(eForm + "</form>".length());
String p = "<p id=\"demo\"></p>";
String bt = "<button type=\"button\" onclick=\"fill_in(name)\">Fill In</button>\n";
String[] data = {"Natta santawalim", "110033333333", "adressssss"};
String sc = "<script>\n ";
sc += "function fill_in(name) \n";
sc += "{\n";
sc += "document.getElementById(\"txtUsername\").value=\'";
sc += data[0];
sc += "\'; \n";
sc += "document.getElementById(\"txtPassword\").value=\'";
sc += data[1];
sc += "\'; \n";
sc += "document.getElementById(\"txtName\").value=\'";
sc += data[2];
sc += "\'; \n";
sc += "}\n";
sc += "</script>\n";
// client.os.write(result.getBytes());
cl += bt.length() + p.length() + sc.length();
client.os.write(uConlen.getBytes());
String l = Integer.toString(cl) + "\r\n";
client.os.write(l.getBytes());
client.os.write(lConlen.getBytes());
client.os.write(uForm.getBytes());
client.os.write(form.getBytes());
client.os.write(bt.getBytes());
client.os.write(sc.getBytes());
client.os.write(p.getBytes());
client.os.write(lForm.getBytes());
// System.out.println("byte "+);
//System.out.println("numofsent byr"+s);
} else {
//don't have form
System.out.println(":::Dont Have form:::");
//client.os.write(buf, 0, bytesRead);
String packet = msg.substring(eHeader + "\r\n\r\n".length());
client.os.write(header.getBytes());
client.os.write(packet.getBytes());
client.os.flush();
}
} else {
// don't have Html content
System.out.println(":::Dont Have Html content:::");
client.os.write(buf, 0, bytesRead);
//client.os.flush();
// num+=bytesRead;
//System.out.println("num "+num);
}
} else {
//don't have content length,transfer-encoding: chunk
System.out.println("chunk");
//client.os.write(buf, 0, bytesRead);
// System.out.println("message");
//System.out.println(msg);
int fChunk = header.indexOf("Transfer-Encoding: chunked");
// String m = msg.substring(eHeader + "\r\n\r\n".length());
if (fChunk != -1) {
//chunk
int sHtml = msg.toLowerCase().indexOf("<html>");
int eHtml = msg.toLowerCase().indexOf("</html>");
if ((sHtml != -1) && (eHtml != -1)) {
//have html
String packet = msg.substring(eHeader + "\r\n\r\n".length());
String[] chunkPt = packet.split("\r\n");
// System.out.println("=====chunk=========== ");
client.os.write(header.getBytes());
for (int i = 0; i < (chunkPt.length - 1); i++) {
int fForm=chunkPt[i].toLowerCase().indexOf("</form>");
if(fForm!=-1){
String bt = "<button type=\"button\" onclick=\"fill_in(name)\">Fill In</button>\n";
int btSizeDec=bt.length();
int cSizeDec=Integer.parseInt(chunkPt[i-1],16);
int totalSizeDec=btSizeDec+cSizeDec;
String totalSizeHex=Integer.toHexString(totalSizeDec);
String h=chunkPt[i].substring(0,fForm);
String t=chunkPt[i].substring(fForm);
chunkPt[i]=h+bt+t;
chunkPt[i-1]=totalSizeHex;
System.out.println("chunkEmbedded");
System.out.println(chunkPt[i]);
}
client.os.write((chunkPt[i]+"\r\n").getBytes());//Error occured here
}
client.os.write((chunkPt[chunkPt.length - 1] + "\r\n\r\n").getBytes());
} else {
System.out.println("dont hav html");
//dont have html
}
} else {
//dont chunk
System.out.println("dont chunk");
}
}
}
client.os.flush();
} catch (Exception x) {
x.printStackTrace();
}
}
}
感谢您帮助我：D
答案 0 :(得分：0)
此异常通常意味着您已写入已被对等方丢失的连接。换句话说，应用程序协议错误。还有其他原因，但这是最常见的原因。