SSLSocket 客户端的输入流无法从服务器接收任何内容

Question

我正在尝试制作一个 TLS 客户端，它将向任何 https 服务器发送 GET 请求。但是，当服务器尝试第二次发送 GET 请求时，没有来自服务器的输入。我不明白为什么它会跳过其他回复。

客户代码：

public class Main {

private static final String HOST = "testserver.com";
private static final int PORT = 443;

public static void main(String[] args) throws IOException {
    BufferedReader socketReader;
    PrintWriter socketWriter;

    SSLSocketFactory sslSocketFactory = (SSLSocketFactory) SSLSocketFactory.getDefault();
    SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(HOST, PORT);
    sslSocket.setKeepAlive(true);
    sslSocket.setUseClientMode(true);
    sslSocket.setEnabledProtocols(new String[] { "TLSv1.2" });
    sslSocket.setEnabledCipherSuites(new String[] { "TLS_RSA_WITH_AES_128_CBC_SHA" });
    sslSocket.startHandshake();

    socketWriter = new PrintWriter(new BufferedWriter(new OutputStreamWriter(sslSocket.getOutputStream())));
    socketReader = new BufferedReader(new InputStreamReader(sslSocket.getInputStream()));

    while (true) {
        socketWriter.print("GET / HTTP/1.0\r\n");
        socketWriter.print("Accept: text/plain, text/html, text/*\r\n");
        socketWriter.print("\r\n");
        socketWriter.flush();

        String inputLine;
        while ((inputLine = socketReader.readLine()) != null) {
            System.out.println(inputLine);
        }

        System.out.println("Finished sending GET Request");
    }

}

输出示例：

HTTP/1.1 200 OK
Server: nginx/1.10.1
Date: Thu, 06 Apr 2017 15:37:21 GMT
Content-Type: text/html
Content-Length: 110
Last-Modified: Fri, 31 Mar 2017 19:19:44 GMT
Connection: close
Vary: Accept-Encoding
ETag: "58deabd0-6e"
Accept-Ranges: bytes
<html>
<head>
    <title>TEST SERVER</title>
</head>
<body>
    TEST
</body>
</html>
Finished sending GET Request

Finished sending GET Request

Finished sending GET Request

Finished sending GET Request

Answer 1

如果非要我猜的话，我会说是因为您没有关闭套接字并打开一个新套接字，所以就网络服务器而言，这是相同的请求。

EG:

你：得到 /INDEX.HTML
服务器：${FILE_CONTENTS}

此时，您的请求已完成，如果我没记错的话，服务器应该关闭其套接字端，但我可能错了

你真正应该做的是每次都为该服务器创建一个新套接字，写入你的请求，获取响应，关闭套接字，冲洗并重复

Answer 2

那是因为您的 HTTP 连接不是 persistent（注意响应中的 Connection: close header）。您需要将 Connection: keep-alive header 添加到请求或切换到 HTTP 1.1（默认情况下连接是持久的）。否则您将不得不为每个请求创建新的 TCP 连接。

SSLSocket 客户端的输入流无法从服务器接收任何内容

SSLSocket client's input stream could not recieve anything from server

java

sockets

inputstream