java https网络问题 [英] java https networking issue

问题描述

我正在尝试实现最简单的HTTPS通信程序.网络上有很多示例，但我无法成功运行它们.
这是一个示例:

I'm trying to implement simplest HTTPS communication program. There are a lot of examples on the web, but I fail to run them successfully.
Here is one example:

public class ReadHttpsURL1 {
   static final int HTTPS_PORT = 443; 

   public static void main(String argv[]) throws Exception {
       String url = "www.sun.com";
       System.setProperty("java.net.useSystemProxies", "true");

      SocketFactory factory = SSLSocketFactory.getDefault(); 

      Socket socket = factory.createSocket(url, HTTPS_PORT); 

      BufferedWriter out = new BufferedWriter(new 
            OutputStreamWriter(socket.getOutputStream()));
      BufferedReader in = new BufferedReader(
        new InputStreamReader(socket.getInputStream()));
      out.write("GET / HTTP/1.0\n\n");
      out.flush();

      String line;
      StringBuffer sb = new StringBuffer();
      while((line = in.readLine()) != null) {
         sb.append(line);
      }
      out.close();
      in.close();
      System.out.println(sb.toString());
   }
}

它挂起大约一分钟的时间(我相信是由于服务器端超时)，并因错误而失败.挂断电话

It hangs up for a time about a minute (I believe due to server-side timeout) and fail with error. Hangs up on

Socket socket = factory.createSocket(url, HTTPS_PORT); 

错误是

Exception in thread "main" java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(Unknown Source)
    at java.net.SocksSocketImpl.readSocksReply(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.<init>(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketFactoryImpl.createSocket(Unknown Source)
    at com.sun.ex1.ReadHttpsURL1.main(ReadHttpsURL1.java:20)

这是第二个例子:

public class HttpsTest {

    public static void main(String[] args) throws MalformedURLException, IOException {
        System.setProperty("java.net.useSystemProxies", "true");

        URL url = new URL("https://www.sun.com");
        URLConnection con = url.openConnection();
        con.setAllowUserInteraction(true);
        InputStream is = new BufferedInputStream(con.getInputStream());
        for (int b = is.read(); b >= 0; b = is.read()) {
            System.out.write(b);
        }
    }
}

只需抛出此异常:

Exception in thread "main" javax.net.ssl.SSLKeyException: RSA premaster secret error
    at com.sun.net.ssl.internal.ssl.RSAClientKeyExchange.<init>(Unknown Source)
    at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverHelloDone(Unknown Source)
    at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)
    at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)
    at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at HttpsTest.main(HttpsTest.java:16)
Caused by: java.security.NoSuchAlgorithmException: SunTlsRsaPremasterSecret KeyGenerator not available
    at javax.crypto.KeyGenerator.<init>(DashoA13*..)
    at javax.crypto.KeyGenerator.getInstance(DashoA13*..)
    at com.sun.net.ssl.internal.ssl.JsseJce.getKeyGenerator(Unknown Source)
    ... 14 more

我已经阅读了一些有关 NoSuchAlgorithmException .这似乎与sunjce_provider.jar
有关我尝试了各种变体，以将该文件包含在类路径中，甚至使应用程序依赖于此jar(肯定在类路径中存在jar)

I've read a bit about NoSuchAlgorithmException. This seems to be related with sunjce_provider.jar
I've tried different variants to include this file in the classpath and even make application dependency to this jar (jar was present in classpath for sure)

HTTPS URL是实时URL.代理服务器设置有效(否则会引发其他连接异常).
Java版本"1.6.0_23"

HTTPS URL is live URL. Proxy settings are working (it throws a different connection exception otherwise).
java version "1.6.0_23"

这些错误是否相关?
有任何解决方法的想法吗?
感谢您的帮助！

Are these errors related?
Any ideas how to fix?
Thanks for help!

推荐答案

套接字出现的问题是由代理引起的.如果我没有得到 java.net.ConnectException，我的结论是错误的:连接被拒绝:connect (以防根本没有配置代理)代理不会引起问题.在来宾网络"(无代理)中，应用程序似乎正在运行.事实证明，代理对于每个协议具有不同的配置，并且我的公司政策不赞成使用原始套接字连接.

Issue with sockets was caused by proxy. I've wrong concluded if I don't get java.net.ConnectException: Connection refused: connect (in case proxy is not configured at all) proxy should not cause issue. In a 'guest network' (without proxy) application appeared to be working. As it turned out proxy had different configuration for each protocol and my company policy deprecate raw sockets connections.

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