我正在尝试构建一个能够接收、处理和响应 http 请求的简单 Web 服务器 (TCP)。我已经在客户端和服务器之间建立了一个 TCP 连接,问题是,虽然我已经尝试过了,但我还没有设法完成 http 请求。这些是 Java 中的客户端和服务器代码:
客户类别:
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.net.UnknownHostException;
public class SocketCliente {
private String hostname;
private int porta;
Socket socketCliente;
public SocketCliente(String hostname, int porta){
this.hostname = hostname;
this.porta = porta;
}
public void connect() throws UnknownHostException, IOException{
System.out.println("Tentando se conectar com "+hostname+":"+porta);
socketCliente = new Socket(hostname,porta);
System.out.println("A conexão foi realizada");
}
public void readResponse() throws IOException{
String userInput;
BufferedReader stdIn = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));
System.out.println("Responsta do servidor:");
while ((userInput = stdIn.readLine()) != null) {
System.out.println(userInput);
}
}
public static void main(String arg[]){
//Creating a SocketClient object
SocketCliente client = new SocketCliente ("localhost",30000);
try {
//trying to establish connection to the server
client.connect();
//if successful, read response from server
client.readResponse();
} catch (UnknownHostException e) {
System.err.println("A conexão não pode ser estabelecida.");
} catch (IOException e) {
System.err.println("Conexão não estabelecida, pois o servidor pode ter problemas."+e.getMessage());
}
}
}
服务器类
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class SocketServidor {
private ServerSocket serverSocket;
private int porta;
public SocketServidor(int porta) {
this.porta = porta;
}
public void start() throws IOException {
System.out.println("Começando o servidor na porta:" + porta);
serverSocket = new ServerSocket(porta);
//Listen for clients. Block till one connects
System.out.println("Esperando o cliente");
Socket client = serverSocket.accept();
//A client has connected to this server. Send welcome message
sendMensagemDeBoasVindas(client);
}
private void sendMensagemDeBoasVindas(Socket cliente) throws IOException {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(cliente.getOutputStream()));
writer.write("A sua conexão com o SocketServidor foi feita");
writer.flush();
}
/**
* Creates a SocketServer object and starts the server.
*
* @param
*/
public static void main(String[] args) {
// Setting a default port number.
int portNumber = 30000;
try {
// initializing the Socket Server
SocketServidor socketServer = new SocketServidor(portNumber);
socketServer.start();
} catch (IOException e) {
e.printStackTrace();
}
}
}
我真的不知道如何发出 http 请求。我尝试创建一个 http 类,尝试从现有的 Client 类发送请求,但到目前为止没有任何效果。所有的谷歌搜索都没有帮助。
一位也在尝试这样做的朋友告诉我,您需要在他们已经建立连接后将请求从 Client 类发送到 Server 类。我该怎么做呢?
拜托,你能帮帮我吗?
@Robin-Green 客户班:
import java.io.*;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.logging.Level;
import java.util.logging.Logger;
public class SocketCliente {
private String hostname;
private int porta;
Socket socketCliente;
public SocketCliente(String hostname, int porta){
this.hostname = hostname;
this.porta = porta;
}
public void connect() throws UnknownHostException, IOException{
System.out.println("Tentando se conectar com "+hostname+":"+porta);
socketCliente = new Socket(hostname,porta);
System.out.println("A conexão foi realizada");
}
public void readResponse() throws IOException{
String userInput;
BufferedReader stdIn = new BufferedReader(new InputStreamReader(socketCliente.getInputStream()));
System.out.println("Responsta do servidor:");
while ((userInput = stdIn.readLine()) != null) {
System.out.println(userInput);
}
}
public void HTTPCliente() throws Exception{
PrintWriter out = new PrintWriter(new OutputStreamWriter(socketCliente.getOutputStream()));
System.out.println("GET / HTTP/1.1");
System.out.println("User-Agent: test/1.0");
System.out.println("Host: localhost");
System.out.println("Accept: */*");
}
public static void main(String arg[]){
//Creating a SocketClient object
SocketCliente client = new SocketCliente ("localhost",30000);
try {
//trying to establish connection to the server
client.connect();
//if successful, read response from server
client.readResponse();
try {
//se http obtiver sucesso
client.HTTPCliente();
} catch (Exception ex) {
Logger.getLogger(SocketCliente.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (UnknownHostException e) {
System.err.println("A conexão não pode ser estabelecida.");
} catch (IOException e) {
System.err.println("Conexão não pode ser feita por problemas no servidor."+e.getMessage());
}
}
}