Java 搭建一台服务器 发送一个html文件和一张图片
import java.io.* ;
import java.net.* ;
import java.util.* ;
public final class WebServer {
// Count the number of connection
static int n = 0;
public static void main(String argv[]) throws Exception
{
// Set the port number.
int port = 2046;
// Establish the listen socket.
ServerSocket serverSocket = new ServerSocket(port);
// Process HTTP service requests in an infinite loop.
while (true){
// Listen for a TCP connection request.
Socket socket = serverSocket.accept();
n++;
HttpRequest request = new HttpRequest(socket,n);
Thread thread = new Thread(request);
thread.start();
}
}
}
final class HttpRequest implements Runnable{
final static String CRLF = "\r\n";
Socket socket;
int n;
// Constructor
public HttpRequest(Socket socket, int n) throws Exception
{
this.socket = socket;
this.n = n;
}
// Implement the run() method of the Runnable interface.
public void run()
{
try {
processRequest();
} catch (Exception e) {
System.out.println(e);
}
}
private void processRequest() throws Exception
{
// Get a reference to the socket's input and output streams.
InputStream is = this.socket.getInputStream();
DataOutputStream os = new DataOutputStream(this.socket.getOutputStream());
// Set up input stream filters.
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// Get the request line of the HTTP request message.
String requestLine = br.readLine();
// Display the request line.
System.out.println();
System.out.println(requestLine);
// Get and display the header lines.
String headerLine = null;
while ((headerLine = br.readLine()).length() != 0) {
System.out.println(headerLine);
}
// Extract the filename from the request line
StringTokenizer tokens = new StringTokenizer(requestLine);
tokens.nextToken(); // skip over the method, which should be "GET"
String fileName = tokens.nextToken();
// Prepend a "." so that file request is within the current directory.
if(fileName.equals("/")){
fileName = "./index.html";
}else{
fileName = "." + fileName;
}
// Open the requested file.
FileInputStream fis = null;
boolean fileExists = true;
try {
fis = new FileInputStream(fileName);
} catch (FileNotFoundException e) {
fileExists = false;
}
// Construct the response message.
String statusLine = null;
String contentTypeLine = null;
String entityBody = null;
if (fileExists) {
statusLine = "HTTP/1.0 200 OK" + CRLF;
contentTypeLine = "Content-type: " + contentType(fileName) + CRLF;
} else {
statusLine = "HTTP/1.0 404 Not Found" + CRLF;
contentTypeLine = "No contents" + CRLF;
entityBody = "<html>" +"<head><title>Not Found</title></head>" +
"<body>Not Found</body></html>";
}
// Send the status line.
os.writeBytes(statusLine);
// Send the content type line.
os.writeBytes(contentTypeLine);
// Send a blank line to indicate the end of the header lines.
os.writeBytes(CRLF);
System.out.println("The number of connection: "+ n);
System.out.println(statusLine);
System.out.println(contentTypeLine);
// Send the entity body.
if (fileExists) {
sendBytes(fis, os);
fis.close();
} else {
os.writeBytes(entityBody);
}
os.close();
is.close();
br.close();
socket.close();
}
private static void sendBytes(FileInputStream fis, OutputStream os) throws Exception {
// Construct a 1K buffer to hold bytes on their way to the socket.
byte[] buffer = new byte[1024];
int bytes = 0;
// Copy requested file into the socket's output stream.
while((bytes = fis.read(buffer)) != -1) {
os.write(buffer, 0, bytes);
}
}
private static String contentType(String fileName) {
if (fileName.endsWith(".htm") || fileName.endsWith(".html")) {
return "text/html";
}
if (fileName.endsWith(".gif")) {
return "image/gif";
}
if (fileName.endsWith(".jpg")) {
return "image/jpeg";
}
if(fileName.endsWith(".java"))
{
return "java file";
}
return "application/octet-stream";
}
}
import java.net.* ;
import java.util.* ;
public final class WebServer {
// Count the number of connection
static int n = 0;
public static void main(String argv[]) throws Exception
{
// Set the port number.
int port = 2046;
// Establish the listen socket.
ServerSocket serverSocket = new ServerSocket(port);
// Process HTTP service requests in an infinite loop.
while (true){
// Listen for a TCP connection request.
Socket socket = serverSocket.accept();
n++;
HttpRequest request = new HttpRequest(socket,n);
Thread thread = new Thread(request);
thread.start();
}
}
}
final class HttpRequest implements Runnable{
final static String CRLF = "\r\n";
Socket socket;
int n;
// Constructor
public HttpRequest(Socket socket, int n) throws Exception
{
this.socket = socket;
this.n = n;
}
// Implement the run() method of the Runnable interface.
public void run()
{
try {
processRequest();
} catch (Exception e) {
System.out.println(e);
}
}
private void processRequest() throws Exception
{
// Get a reference to the socket's input and output streams.
InputStream is = this.socket.getInputStream();
DataOutputStream os = new DataOutputStream(this.socket.getOutputStream());
// Set up input stream filters.
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// Get the request line of the HTTP request message.
String requestLine = br.readLine();
// Display the request line.
System.out.println();
System.out.println(requestLine);
// Get and display the header lines.
String headerLine = null;
while ((headerLine = br.readLine()).length() != 0) {
System.out.println(headerLine);
}
// Extract the filename from the request line
StringTokenizer tokens = new StringTokenizer(requestLine);
tokens.nextToken(); // skip over the method, which should be "GET"
String fileName = tokens.nextToken();
// Prepend a "." so that file request is within the current directory.
if(fileName.equals("/")){
fileName = "./index.html";
}else{
fileName = "." + fileName;
}
// Open the requested file.
FileInputStream fis = null;
boolean fileExists = true;
try {
fis = new FileInputStream(fileName);
} catch (FileNotFoundException e) {
fileExists = false;
}
// Construct the response message.
String statusLine = null;
String contentTypeLine = null;
String entityBody = null;
if (fileExists) {
statusLine = "HTTP/1.0 200 OK" + CRLF;
contentTypeLine = "Content-type: " + contentType(fileName) + CRLF;
} else {
statusLine = "HTTP/1.0 404 Not Found" + CRLF;
contentTypeLine = "No contents" + CRLF;
entityBody = "<html>" +"<head><title>Not Found</title></head>" +
"<body>Not Found</body></html>";
}
// Send the status line.
os.writeBytes(statusLine);
// Send the content type line.
os.writeBytes(contentTypeLine);
// Send a blank line to indicate the end of the header lines.
os.writeBytes(CRLF);
System.out.println("The number of connection: "+ n);
System.out.println(statusLine);
System.out.println(contentTypeLine);
// Send the entity body.
if (fileExists) {
sendBytes(fis, os);
fis.close();
} else {
os.writeBytes(entityBody);
}
os.close();
is.close();
br.close();
socket.close();
}
private static void sendBytes(FileInputStream fis, OutputStream os) throws Exception {
// Construct a 1K buffer to hold bytes on their way to the socket.
byte[] buffer = new byte[1024];
int bytes = 0;
// Copy requested file into the socket's output stream.
while((bytes = fis.read(buffer)) != -1) {
os.write(buffer, 0, bytes);
}
}
private static String contentType(String fileName) {
if (fileName.endsWith(".htm") || fileName.endsWith(".html")) {
return "text/html";
}
if (fileName.endsWith(".gif")) {
return "image/gif";
}
if (fileName.endsWith(".jpg")) {
return "image/jpeg";
}
if(fileName.endsWith(".java"))
{
return "java file";
}
return "application/octet-stream";
}
}