使用Java代碼中的JIRA REST API的GET方法時出現HTTP 401異常

Question

我正在嘗試使用Java代碼使用JIRA API。 它給我401。此錯誤指出

HTTP Error 401 - Unauthorized: Access is denied due to invalid credentials.

但是我在代碼中使用的鏈接和憑據與Firefox REST Client完美配合，這讓我發瘋。 這是我的代碼。

    String url = "https://jira.atlassian.com/rest/api/1/search?jql=project=APS";
    URL obj = new URL(url);

    HttpURLConnection con = (HttpURLConnection) obj.openConnection();

    //Setting the Request Method header as GET
    con.setRequestMethod("GET");

    //Prepairing credentials        
    String cred= "ahmed.tausif@spmconsulting.net:spm12345678";
    byte[] encoded = Base64.encodeBase64(cred.getBytes());                     
    String credentials = new String(encoded);

    //Setting the Authorization Header as 'Basic' with the given credentials
    con.setRequestProperty  ("Authorization", "Basic " + credentials);

    //Setting the User-Agent header
    con.setRequestProperty("User-Agent", USER_AGENT);

    int responseCode = con.getResponseCode();

    //reading the return 
    BufferedReader in = new BufferedReader(
                new InputStreamReader(con.getInputStream())
            );
    String inputLine;
    StringBuffer response = new StringBuffer();

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

    String result = response.toString();

我收到以下異常

Exception in thread "main" java.io.IOException: Server returned HTTP response code: 401 for URL: https://jira.atlassian.com/rest/api/2/issue/USER-274
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
    at java.lang.reflect.Constructor.newInstance(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
    at jira_RESPAPI.getJSON(jira_RESPAPI.java:53)
    at connector.main(connector.java:37)
Caused by: java.io.IOException: Server returned HTTP response code: 401 for URL: https://jira.atlassian.com/rest/api/2/issue/USER-274
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at jira_RESPAPI.getJSON(jira_RESPAPI.java:49)

花在這個上的時間無法弄清楚。

ps另外，當我通過Firefox RESTClient發送GET請求時，將出現以下框，單擊5-7次使其消失，然后我可以看到結果。

Answer 1

我嘗試了與您完全相同的代碼（進行了一些非常小的更改），並且效果很好。 由此我只能假設：

1. 您提供的憑據不正確
2. 您的網址中有錯字
3. Base64.encodeBase64返回錯誤的東西。

嘗試使用

java.util.Base64.getEncoder().encode(cred.getBytes())

代替

我的完整代碼，供您參考：

    package hello;

    import org.springframework.http.HttpHeaders;

    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    import java.net.HttpURLConnection;
    import java.net.URL;
    import java.util.Base64;


    public class Application {

        public static void main(String args[]) throws IOException {
            String url = "https://my-jira-domain.atlassian.net/rest/api/2/issue/MOON-13";
            URL obj = new URL(url);

            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            //Setting the Request Method header as GET
            con.setRequestMethod("GET");

            //Prepairing credentials
            String cred = "my@jira.com:mypassword";
            byte[] encoded = Base64.getEncoder().encode(cred.getBytes());
            String credentials = new String(encoded);

            //Setting the Authorization Header as 'Basic' with the given credentials
            con.setRequestProperty("Authorization", "Basic " + credentials);

            //Setting the User-Agent header
            con.setRequestProperty("User-Agent", HttpHeaders.USER_AGENT);

            int responseCode = con.getResponseCode();

            //reading the return
            BufferedReader in = new BufferedReader(
                    new InputStreamReader(con.getInputStream())
            );
            String inputLine;
            StringBuffer response = new StringBuffer();

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

            String result = response.toString();
        }
    }