比较 Python 和 Java 之间的 HTTP Post （Jenkins 302/403 响应代码）

Question

我有一个简单的 python 代码可以工作，但我无法让它在 Java 中工作它也可以通过 curl 和邮递员工作。请帮忙

下面的代码是python，相当简单明了。它 returns 200.

<!-- language: lang-python -->

import requests
params = (
    ('member', 'xxx'),
)

response = requests.post('http://jenkinsurl1/submitRemoveMember', params=params, auth=('user', 'notbase64encodedtoken'))
print(response)

Returns 200

以下代码在 java 中，我无法在 java 中找到一种简单直接的方法来执行此操作。

<!-- language: lang-java -->

//main() function

String auth = "user" + ":" + "notbase64encodedtoken";
byte[] encodedAuth = Base64.getEncoder().encode(auth.getBytes(StandardCharsets.UTF_8));
final String POST_PARAMS = "member=xxxx";
MyPOSTRequest(POST_PARAMS,encodedAuth,"http://jenkinsurl1/submitRemoveMember");


public static void MyPOSTRequest(String Parameters, byte[] encodedAuth, String POST_URL) throws IOException {

URL obj = new URL(POST_URL);
HttpURLConnection con = (HttpURLConnection) obj.openConnection();
byte[] postData       = Parameters.getBytes( StandardCharsets.UTF_8 );
int    postDataLength = postData.length;
con.setRequestMethod("POST");
con.setDoOutput( true );
con.setInstanceFollowRedirects( false );
con.setRequestProperty( "Content-Type", "application/x-www-form-urlencoded");
con.setRequestProperty( "charset", "utf-8");
con.setRequestProperty( "Content-Length", Integer.toString( postDataLength ));
String authHeaderValue = "Basic " + new String(encodedAuth);
con.setRequestProperty("Authorization", authHeaderValue);
con.setUseCaches( false );
    
try( DataOutputStream wr = new DataOutputStream( con.getOutputStream())) {
    wr.write( postData );
    wr.flush();
}
int responseCode = con.getResponseCode();
System.out.println("POST Response Code :: " + responseCode);
    
if (responseCode == HttpURLConnection.HTTP_OK) { //success
  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());
     } else {
       System.out.println("POST request not worked");
       }
 }

POST Response Code :: 302
POST request not worked

Answer 1

您的 Java 代码不处理重定向响应（HTTP 代码 302）。

Answer 2

这与 Jenkins 的特质有关，而不是 java。 302 错误代码是预期的，Jenkins 接受并完成所需的工作，returns 使用 302。虽然我不知道 python 如何在内部处理它（并调用两次？）和 returns 最终代码 200

仅供参考，如果 setInstanceFollowedRedirects 设置为 true，我会收到 403

jenkins bug
similar unanswered on Whosebug

我就是这样绕过它的。为可能运行加入其中的其他人发帖。

 int responseCode = con.getResponseCode();
 System.out.println("POST Response Code :: " + responseCode);

 if (responseCode == HttpURLConnection.HTTP_MOVED_TEMP) { //MOVED_TEMP
  String location = con.getHeaderField("Location");
  System.out.println(location);
  MyPOSTRequest(Parameters, encodedAuth, location); //calling the same function again with redirected url.
 }

POST Response Code :: 302
http://jenkinsurl1
POST Response Code :: 200

比较 Python 和 Java 之间的 HTTP Post （Jenkins 302/403 响应代码）

compare HTTP Post between Python and Java (Jenkins 302/403 response code)

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