我正在尝试通过打开 TCP 套接字、发送请求并读取/打印响应消息来手动执行一些 HTTP。响应正文的内容打印良好,但主线程永远不会退出并永远阻塞。
socket = new Socket(host, port);
PrintWriter writer = new PrintWriter(socket.getOutputStream());
writer.print(request);
writer.flush();
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
reader.lines().forEach(System.out::println);
// String next_record = null;
// while ((next_record = reader.readLine()) != null)
// System.out.println(next_record);
socket.close();
// System.out.println("Finished");
我缺少什么,如何修复它?
最佳答案
您确定正确发送 HTTP 请求吗?这对我有用。请注意“Connection: Close\r\n”字符串很重要,否则在阅读内容后它也会挂起。
import java.net.Socket;
import java.io.PrintWriter;
import java.io.*;
public class App {
public static void main(String[] args) throws Exception {
String host = "google.com";
int port = 80;
Socket socket = new Socket(host, port);
//BufferedWriter writer = new BufferedWriter(
// new OutputStreamWriter(socket.getOutputStream(), "UTF-8"));
PrintWriter writer = new PrintWriter(socket.getOutputStream());
writer.write("GET / HTTP/1.1\r\n");
writer.write("Connection: Close\r\n");
writer.write("\r\n");
writer.flush();
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream(), "UTF-8"));
// reader.lines().forEach(System.out.println);
String line;
System.out.println("Reading lines:");
while ((line = reader.readLine()) != null) {
System.out.println("* " + line);
}
System.out.println("DONE READING RESPONSE");
reader.close();
writer.close();
// socket.close();
System.out.println("Finished");
}
}
关于java - 为什么从套接字流读取会永远阻塞?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22691665/