Question

我是java的新手，并尝试连接到应用程序但我收到错误 - 服务器返回HTTP响应代码：401 -

我按照提到的所有帮助网址，尝试了几乎所有关于主题的连接代码，但我仍然无法通过提及的凭据连接到网址。

代码如下 -

 import java.io.BufferedReader;
 import java.io.DataOutputStream;
 import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import sun.misc.*;

 import javax.net.ssl.HttpsURLConnection;
 import org.apache.commons.codec.*;

 @SuppressWarnings("unused")
 public class hello {

/**
 * @param args
 */
//private final String USER_AGENT = "";
public static void main(String[] args) throws Exception {
    // TODO Auto-generated method stub
    hello http = new hello();


    System.out.println("Testing 1 - Send Http GET request");
    http.sendGet();

   // System.out.println("\nTesting 2 - Send Http POST request");
  //  http.sendPost();
}

@SuppressWarnings("unused")
private void sendGet() throws Exception {

    String url = "https:/***.com/";
    URL obj = new URL(url);
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
    String userPassword= "gangajap:Mumbai02";

    String encoding = new String(org.apache.commons.codec.binary.Base64.encodeBase64(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(userPassword)));
    System.out.println("----"+encoding);


    //add reuqest header
    con.setRequestMethod("GET");
    con.setRequestProperty("Content-Type", "text/plain");
    con.setRequestProperty("charset", "UTF-8");
    con.setRequestProperty("Authorization", "Basic" +encoding);


    String urlParameters = "?USER=gangajap&MRP=15c6ca083c2f75a73e0fbbd2832290f29&PROJECTID=1&USECACHEURL=1&IGNORE_REAL_ACTIVE_TIME=1";

    // Send post request
    con.setDoOutput(true);
    DataOutputStream wr = new DataOutputStream(con.getOutputStream());
    System.out.println("1111" +wr);
    wr.writeBytes(urlParameters);
    wr.flush();
    wr.close();

    int responseCode = con.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);

    BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    //print result
    System.out.println(response.toString());

}

 }

Answer 1

中缺少空格

con.setRequestProperty("Authorization", "Basic" +encoding);

应该是

con.setRequestProperty("Authorization", "Basic " +encoding);

因为encoded是一个base64字符串，根据Authorization header，它必须与Basic（auth类型）分隔，并带有空格

Answer 2

您的HTTP基本身份验证标头缺少空格，您可以从here查看更多详细信息：

con.setRequestProperty("Authorization", "Basic" +encoding);
                                              ^
con.setRequestProperty("Authorization", "Basic " +encoding);

服务器返回HTTP响应代码：401

2 个答案: