我正在制作一个依赖于设置 http.proxyPort Và http.proxyHost 的 Java 应用程序。有两个进程:一个是正则程序，一个是代理程序。我有一个在 http.proxyPort(我控制的)上运行的简单套接字监听器。就这么简单

trong khi (đúng) {
    thử {
    Socket connection = server.accept();

    Handler handler = new Handler(connection);
    handler.start();
    } catch (Ngoại lệ ex) {
        ví dụ: printStackTrace();
    }
}

所以每当“进程 1”发出 http 请求时——比如

URL yahoo = new URL("http://www.google.ca/");
URLConnection yc = yahoo.openConnection();
System.out.println(yc.getClass().getName());
BufferedReader in = new BufferedReader(new InputStreamReader(yc.getInputStream()));

它通过代理。现在如果客户端使用 HTTPS 协议(protocol)怎么办？喜欢改用 https://google.ca 吗？有一个属性 https.proxyPort Và https.proxyHost，但我确实已经尝试了几个月(断断续续，这不太重要)，但运气不佳。我已经阅读了很多话题(我会在最后列出一些，这样您就知道我做了一些事情)。

到目前为止我最接近的尝试:服务器

thử {
    System.setProperty("javax.net.ssl.keyStore", "test.jks");
    System.setProperty("javax.net.ssl.keyStorePassword", "2520xe");

    SSLServerSocketFactory sslserversocketfactory =
            (SSLServerSocketFactory) SSLServerSocketFactory.getDefault();
    SSLServerSocket sslserversocket =
            (SSLServerSocket) sslserversocketfactory.createServerSocket(9999);
    System.out.println("Ready");
    SSLSocket sslsocket = (SSLSocket) sslserversocket.accept();

    InputStream inputstream = sslsocket.getInputStream();
    InputStreamReader inputstreamreader = new InputStreamReader(inputstream);
    BufferedReader bufferedreader = new BufferedReader(inputstreamreader);

    OutputStream toClient = sslsocket.getOutputStream();
    toClient.write(("HTTP/1.0 200 Connection established\n" +
            "Content-Length: " + "Shut down!".getBytes().length
                                     + "\r\n").getBytes("utf-8"));
    toClient.write("Shut down!".getBytes("utf-8"));
    toClient.close();
} catch (Exception exception) {
    exception.printStackTrace();
}

khách hàng

thử {
    System.setProperty("https.proxyHost", "127.0.0.1");
    System.setProperty("https.proxyPort", "9999");
    URL yahoo = new URL("https://www.google.ca/");
    URLConnection yc = yahoo.openConnection();
    System.out.println(yc.getClass().getName());
    BufferedReader in = new BufferedReader(
                new InputStreamReader(
                yc.getInputStream()));
    String inputLine;

    while ((inputLine = in.readLine()) != null) 
    System.out.println(inputLine);
    ghim theo();
} catch (Ngoại lệ ex) {
    ví dụ: printStackTrace();
}

我收到此错误 javax.net.ssl.SSLException: Unrecognized SSL message, plaintext connection? 我用谷歌搜索了它，但想出了一些邮件内容。

基本上，我需要创建一个 java 代理服务器，它通过 https.proxyPort Và https.proxyHost 标志设置到客户端，并且可以发送数据返回客户端应用程序，不能以任何方式修改(它只是使用 URL connection = new URL("https://..."))

我试过的几个网站...

• creating a Java Proxy Server that accepts HTTPS
• http://stilius.net/java/java_ssl.php
• 还有一些关于让 Java 接受所有证书的事情，但我找不到任何链接。我有代码，但我遇到的错误比我现在正在做的要多，但如果它有帮助，我可以包括它(我最初没有，因为这已经是一个很长的问题)

câu trả lời hay nhất

正如 auntyellow 评论的那样:您不需要自己进行任何 SSL 操作。基本上 https 代理是关于在两方之间转发二进制数据。

引用draft-luotonen-web-proxy-tunneling-01.txt :

 CLIENT -> SERVER SERVER -> CLIENT
 -------------------------------------- -----------------------------------
 CONNECT home.netscape.com:443 HTTP/1.0
 User-agent: Mozilla/4.0
 <<< empty line >>>
                                         HTTP/1.0 200 Connection established
                                         Proxy-agent: Netscape-Proxy/1.1
                                         <<< empty line >>>
              <<< data tunneling to both directions begins >>>

所以基本上你需要确保你足够信任你的客户端从你的代理防火墙位置连接到给定的主机和端口。由于这种常见的做法是将允许的端口限制为 443，拒绝连接到本地主机和来自“不受信任”的各方。

这是一个“简单”的服务器，如果您不相信 jet，可以在 Java 中用作 https.proxy:

import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Created for http://stackoverflow.com/q/16351413/1266906.
 */
public class Server extends Thread {

    public static void main(String[] args) {
        (new Server()).run();
    }

    public Server() {
        super("Server Thread");
    }

    @Ghi đè
    công khai void run() {
        try (ServerSocket serverSocket = new ServerSocket(9999)) {
            Socket socket;
            thử {
                while ((socket = serverSocket.accept()) != null) {
                    (new Handler(socket)).start();
                }
            } bắt (IOException e) {
                e.printStackTrace(); // TODO: implement catch
            }
        } bắt (IOException e) {
            e.printStackTrace(); // TODO: implement catch
            trở lại;
        }
    }

    public static class Handler extends Thread {
        public static final Pattern CONNECT_PATTERN = Pattern.compile("CONNECT (.+):(.+) HTTP/(1\\.[01])",
                                                                      Pattern.CASE_INSENSITIVE);
        private final Socket clientSocket;
        private boolean previousWasR = false;

        public Handler(Socket clientSocket) {
            this.clientSocket = clientSocket;
        }

        @Ghi đè
        công khai void run() {
            thử {
                String request = readLine(clientSocket);
                System.out.println(request);
                Matcher matcher = CONNECT_PATTERN.matcher(request);
                if (matcher.matches()) {
                    String header;
                    LÀM {
                        header = readLine(clientSocket);
                    } while (!"".equals(header));
                    OutputStreamWriter outputStreamWriter = new OutputStreamWriter(clientSocket.getOutputStream(),
                                                                                   "ISO-8859-1");

                    final Socket forwardSocket;
                    thử {
                        forwardSocket = new Socket(matcher.group(1), Integer.parseInt(matcher.group(2)));
                        System.out.println(forwardSocket);
                    } catch (IOException | NumberFormatException e) {
                        e.printStackTrace(); // TODO: implement catch
                        outputStreamWriter.write("HTTP/" + matcher.group(3) + " 502 Bad Gateway\r\n");
                        outputStreamWriter.write("Proxy-agent: Simple/0.1\r\n");
                        outputStreamWriter.write("\r\n");
                        outputStreamWriter.flush();
                        trở lại;
                    }
                    thử {
                        outputStreamWriter.write("HTTP/" + matcher.group(3) + " 200 Connection established\r\n");
                        outputStreamWriter.write("Proxy-agent: Simple/0.1\r\n");
                        outputStreamWriter.write("\r\n");
                        outputStreamWriter.flush();

                        Thread remoteToClient = new Thread() {
                            @Ghi đè
                            công khai void run() {
                                forwardData(forwardSocket, clientSocket);
                            }
                        };
                        remoteToClient.start();
                        thử {
                            if (previousWasR) {
                                int read = clientSocket.getInputStream().read();
                                if (read != -1) {
                                    if (read != '\n') {
                                        forwardSocket.getOutputStream().write(read);
                                    }
                                    forwardData(clientSocket, forwardSocket);
                                } khác {
                                    if (!forwardSocket.isOutputShutdown()) {
                                        forwardSocket.shutdownOutput();
                                    }
                                    if (!clientSocket.isInputShutdown()) {
                                        clientSocket.shutdownInput();
                                    }
                                }
                            } khác {
                                forwardData(clientSocket, forwardSocket);
                            }
                        } Cuối cùng {
                            thử {
                                remoteToClient.join();
                            } bắt (InterruptedException e) {
                                e.printStackTrace(); // TODO: implement catch
                            }
                        }
                    } Cuối cùng {
                        forwardSocket.close();
                    }
                }
            } bắt (IOException e) {
                e.printStackTrace(); // TODO: implement catch
            } Cuối cùng {
                thử {
                    clientSocket.close();
                } bắt (IOException e) {
                    e.printStackTrace(); // TODO: implement catch
                }
            }
        }

        private static void forwardData(Socket inputSocket, Socket outputSocket) {
            thử {
                InputStream inputStream = inputSocket.getInputStream();
                thử {
                    OutputStream outputStream = outputSocket.getOutputStream();
                    thử {
                        byte[] buffer = new byte[4096];
                        int read;
                        LÀM {
                            read = inputStream.read(buffer);
                            if (read > 0) {
                                outputStream.write(buffer, 0, read);
                                if (inputStream.available() < 1) {
                                    outputStream.flush();
                                }
                            }
                        } while (read >= 0);
                    } Cuối cùng {
                        if (!outputSocket.isOutputShutdown()) {
                            outputSocket.shutdownOutput();
                        }
                    }
                } Cuối cùng {
                    if (!inputSocket.isInputShutdown()) {
                        inputSocket.shutdownInput();
                    }
                }
            } bắt (IOException e) {
                e.printStackTrace(); // TODO: implement catch
            }
        }

        private String readLine(Socket socket) throws IOException {
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            int next;
            readerLoop:
            while ((next = socket.getInputStream().read()) != -1) {
                if (previousWasR && next == '\n') {
                    previousWasR = false;
                    Tiếp tục;
                }
                previousWasR = false;
                switch (next) {
                    case '\r':
                        previousWasR = true;
                        break readerLoop;
                    case '\n':
                        break readerLoop;
                    mặc định:
                        byteArrayOutputStream.write(next);
                        phá vỡ;
                }
            }
            return byteArrayOutputStream.toString("ISO-8859-1");
        }
    }
}

关于Java https 代理(使用 https.proxyPort 和 https.proxyHost)，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16351413/