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안녕하세요 저는 Java에서 다중 스레드 HTTP 서버를 만들었으며 웹 브라우저를 사용할 때 컨텐츠를 가져올 수 없습니다. 텔넷 클라이언트를 사용하여 웹 서버에서 읽을 때 제대로 작동하지만 크롬과 같은 브라우저에서는 아무 것도 표시되지 않습니다. 나는 텔넷을 통한 연결이 잘 작동하는지 보여주는 및 사용 크롬 browswer을 통해 웹 서버를 호출 할 때 Wireshark를 캡처를 보여줍니다 추가 사진 아래 3 개 장의 사진을 게시 한 :HTTP 서버가 브라우저와 작동하지 않습니다.
http://localhost:4568
아래에 작성한 코드는 다음과 같습니다. 디버깅을 쉽게하기 위해 코드를 싱글 스레드로 변경했습니다. "디버깅 섹션"이라고하는 MainWebServer의 섹션은 스레딩 클래스에 포함되어 있습니다.
MainWebServer :
package my.simple.webserver;
import java.io.*;
import java.net.*;
import java.util.*;
@SuppressWarnings("unused")
public class mainWebServer {
private static ServerSocket ser = null;
private static Socket cli = null;
private static String host = null;
private static int port;
/**
* @param args
*/
public static void main(String[] args) {
// Get parameters
if(args.length < 2)
{
setHost("localhost");
port = 4568;
}
else
{
setHost(args[0]);
port = Integer.parseInt(args[1]);
}
// initialize server
try {
// change to take in host
ser = new ServerSocket(port);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while(true)
{
try {
setCli(ser.accept());
//(new Thread(new HttpThread(cli))).start();
// Debugging section
DataInputStream sockIn = new DataInputStream(cli.getInputStream());
HttpRequest req = new HttpRequest(cli);
int cnt = 0;
byte[] buffer = new byte[1024];
while((cnt = sockIn.read(buffer)) >= 0)
{
System.out.println("We are here");
req.checkMethod(new String(buffer));
resetBuffer(buffer, 256);
}
// end debugging section
// run thread for client socket
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
public static String getHost() {
return host;
}
public static void setHost(String host) {
mainWebServer.host = host;
}
public static Socket getCli() {
return cli;
}
public static void setCli(Socket cli) {
mainWebServer.cli = cli;
}
// remove after debugging
public static void resetBuffer(byte[] buffer2, int i) {
// TODO Auto-generated method stub
for(int x=0; x < i; x++)
{
buffer2[x] = 0;
}
}
}
HttpRequest를 클래스 :
package my.simple.webserver;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.util.NoSuchElementException;
import java.util.StringTokenizer;
public class HttpRequest {
private String method = null;
private String path = null;
private FileInputStream fis = null;
private OutputStream os = null;
private Socket mycli;
private static final String HTTP_OK_RESPONSE = "HTTP/1.1 200 OK\r\n";
private static final String HTTP_FNF_RESPONSE = "HTTP/1.1 404 NOT FOUND\r\n";
private static final String HTTP_DATE_RESPONSE = "Date: Mon, 04-Jan-99 13:14:15 GMT\r\n";
private static final String HTTP_SERVER_RESPONSE = "Server: Challenger\r\n";
private static final String HTTP_CONTENT_TYPE = "Content-Type: text/html\r\n";
private String HTTP_Content_Length = "Content-length: ";
public HttpRequest(Socket myCli) {
// TODO Auto-generated constructor stub
mycli = myCli;
}
void checkMethod(String buffer)
{
// get data and parse for method, location and protocol
// use switch statement based on method given
System.out.println("buffer = " + buffer);
StringTokenizer tok = new StringTokenizer(buffer);
try
{
method = tok.nextToken();
path = tok.nextToken();
}
catch(NoSuchElementException nse)
{
System.out.println(nse.getMessage());
method = "";
}
//System.out.println("method=" + method + " path=" + path);
switch(method)
{
case "GET":
//System.out.println("Get method called");
getMethod();
break;
case "HEAD":
System.out.println("Head method called");
break;
case "POST":
System.out.println("Post method called");
break;
case "PUT":
System.out.println("Put method called");
break;
case "DELETE":
System.out.println("Delete method called");
break;
case "TRACE":
System.out.println("Trace method called");
break;
case "OPTIONS":
System.out.println("Options method called");
break;
case "CONNECT":
System.out.println("Connect method called");
break;
default:
break;
}
}
private void getMethod()
{
String file;
File f = null;
// check if file exists
if(path.equalsIgnoreCase("/"))
{
//file = checkForIndex();
file = "index.html";
}
else
file = path;
System.out.println("file = " + file);
// open file
try {
file = "badfile.html";
f = new File(file);
os = mycli.getOutputStream();
//check if file exists
if(f.exists())
{
byte[] buffer = null;
buffer = HTTP_OK_RESPONSE.getBytes();
os.write(buffer);
buffer = HTTP_DATE_RESPONSE.getBytes();
os.write(buffer);
buffer = HTTP_SERVER_RESPONSE.getBytes();
os.write(buffer);
buffer = HTTP_CONTENT_TYPE.getBytes();
os.write(buffer);
long fileLen = f.length();
HTTP_Content_Length = HTTP_Content_Length.concat(String.valueOf(fileLen));
HTTP_Content_Length = HTTP_Content_Length.concat("\r\n");
buffer = HTTP_Content_Length.getBytes();
os.write(buffer);
fis = new FileInputStream(file);
int nread, result;
// read file
while((nread = fis.available()) > 0)
{
buffer = new byte[nread];
result = fis.read(buffer);
if(result == -1) break;
os.write(buffer);
}
System.out.println("Left the loop!");
mycli.close();
}
else
{
// deal with 404
byte[] buffer = null;
buffer = HTTP_FNF_RESPONSE.getBytes();
os.write(buffer);
buffer = HTTP_DATE_RESPONSE.getBytes();
os.write(buffer);
buffer = HTTP_SERVER_RESPONSE.getBytes();
os.write(buffer);
buffer = HTTP_CONTENT_TYPE.getBytes();
os.write(buffer);
f = new File("fnf.html");
long fileLen = f.length();
HTTP_Content_Length = HTTP_Content_Length.concat(String.valueOf(fileLen));
HTTP_Content_Length = HTTP_Content_Length.concat("\r\n");
buffer = HTTP_Content_Length.getBytes();
os.write(buffer);
fis = new FileInputStream(f);
int nread, result;
// read file
while((nread = fis.available()) > 0)
{
buffer = new byte[nread];
result = fis.read(buffer);
if(result == -1) break;
os.write(buffer);
}
System.out.println("Left the loop!");
mycli.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// end thread
}
}
내가 한 번 위기에 오전, 내가 어떤 도움을 주셔서 감사합니다.
감사합니다.