java - 如何通过 Java 中的 Socket 编程将 post 数据(包含 2 个参数)发送到 https 服务器

Question

我在网络上看到一个表单，如果我给出代码(R)，车号，它会给出一些信息，现在我想通过套接字编程获取这些信息。我已经编写了代码，但它挂起

网址:https://aptransport.in/CFSTONLINE/Reports/VehicleRegistrationSearch.aspx

import java.net.*;
import java.io.*;
import java.security.*;
import javax.net.ssl.*;

public class TestAP {

 public static void main(String[] args) {

int port = 443; // default https port


try{
URL url = new URL("https://aptransport.in/CFSTONLINE/Reports/VehicleRegistrationSearch.aspx");

String path=url.getFile();
//  int port = url.getPort();
String host = url.getHost();

        System.out.println("Step 0 : Connecting to Server");
        Socket cliSocket = new Socket(host,port);
        System.out.println("Step 1 : Connection Established ");


            System.out.println("Step 2 :  Creating Request");
        String data1 = URLEncoder.encode("ctl00$OnlineContent$ddlInput", "UTF-8") + "=" + URLEncoder.encode("R",        "UTF-8")        +"&"+URLEncoder.encode("ctl00$OnlineContent$txtInput", "UTF-8") + "=" + URLEncoder.encode("AP31BF2942", "UTF-8");


            BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(cliSocket.getOutputStream()));

             bw.write("POST " + path + " HTTPS/1.0\r\n");
             bw.write("Host: " + host + "\r\n");
             bw.write("Content-Length: " + data1.length() + "\r\n");
                 bw.write("Pragma: cache\r\n");
             bw.write("Cache-Control: private, must-revalidate\r\n");
             bw.write("Content-Type: application/x-www-form-urlencoded\r\n");   
         bw.write("\r\n");
         bw.write(data1);

                 bw.flush();


    System.out.println("Step 3 :  Request Sent ");

        BufferedReader rd = new BufferedReader(new InputStreamReader(cliSocket.getInputStream()));
        String line;
    System.out.println("Step 4 : Getting Input Stream");
    StringBuffer serverData = new StringBuffer("");

    while ((line = rd.readLine()) != null) {
      serverData.append(line);      
}

System.out.println(" \r\n \r\n ******* Data From Server Start : ******* \r\n  \r\n \r\n"+serverData+" \r\n \r\n ******* Data From                   Server End  ********* \r\n \r\n ");    

String data = serverData.toString();

 bw.close();
 rd.close();

}catch(java.net.UnknownHostException uh){
System.out.println("UH : Host Not Found ");    
}catch(IOException ioe){
System.out.println("IO Exp "+ioe.getMessage());    
}catch(Exception e){
System.out.println("Exp "+e.getMessage());    
}


}
}  

IO Exp Connection reset java.net.SocketException: Connection reset at java.net.SocketInputStream.read(SocketInputStream.java:189) at java.net.SocketInputStream.read(SocketInputStream.java:121) at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:283) at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:325) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:177) at java.io.InputStreamReader.read(InputStreamReader.java:184) at java.io.BufferedReader.fill(BufferedReader.java:154) at java.io.BufferedReader.readLine(BufferedReader.java:317) at java.io.BufferedReader.readLine(BufferedReader.java:382) at TestAP.main(TestAP.java:59)

Answer 1

这里最好的想法是使用 HttpsURLConnection，它可以为您处理大部分协议(protocol)详细信息。如果您确实想使用套接字，那么使用 SSLSocket 而不是普通的 Socket 至少可以处理协议(protocol)的 SSL/TLS 部分。

以下是这两个类的 Javadoc 的链接。您还需要了解一些相关的类，但这将帮助您入门。

HttpURLConnection 的 Javadoc:http://docs.oracle.com/javase/7/docs/api/javax/net/ssl/HttpsURLConnection.html

SSLSocket 的 Javadoc:http://docs.oracle.com/javase/7/docs/api/javax/net/ssl/SSLSocket.html