IllegalStateException : 连接到 HttpURL 时已经连接

Question

I am trying to read a git file by providing a http url of git repository. My repository is not public so I provided the authentication details in my code and tried to connect but it is giving errors. My code is as given below:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

import com.sun.xml.internal.messaging.saaj.util.Base64;

public class testInAction {

    static String username = "user@db.com";
    static String password = "12345678";

    public static void main(String[] args) throws Throwable {

        String link = "https://stash.gto.intranet.db.com:8081/projects/myproject/browse";
        URL searchURL = new URL(link);
        System.out.println("start");
        URLConnection searchHttp = (HttpURLConnection) searchURL.openConnection();
        searchHttp.setRequestProperty("X-Requested-With", "Curl");
        Map<String, List<String>> searchHeader = searchHttp.getHeaderFields();
        String userPass = username + ":" + password;
        String basicAuth = "Basic" + new String(new Base64().encode(userPass.getBytes()));
        searchHttp.setRequestProperty("Authorization", basicAuth);
        InputStream searchStream = searchHttp.getInputStream();
        String searchResponse = searchGetStringFromStream(searchStream);
        System.out.println(searchResponse);
    }

    private static String searchGetStringFromStream(InputStream seachStream1) throws IOException {
        if (seachStream1 != null) {
            Writer searchWriter = new StringWriter();
            char[] searchBuffer = new char[2048];
            try {
                Reader searchReader = new BufferedReader(new InputStreamReader(seachStream1, "UTF-8"));
                int counter;
                while ((counter = searchReader.read(searchBuffer)) != -1) {
                    searchWriter.write(searchBuffer, 0, counter);
                }
            } finally {
                seachStream1.close();
            }
            return searchWriter.toString();
        } else {
            return "No Contents";
        }
    }
}

But I am getting the IllegalStateException error on running this code. The full error stack is as given below: Exception in thread "main" java.lang.IllegalStateException: Already connected at sun.net.www.protocol.http.HttpURLConnection.setRequestProperty(HttpURLConnection.java:3014) What can be the reason for this error and how to get it resolved?

Answer 1

From the javadoc :

URLConnection objects go through two phases: first they are created, then they are connected. After being created, and before being connected, various options can be specified (eg, doInput and UseCaches). After connecting, it is an error to try to set them. Operations that depend on being connected, like getContentLength, will implicitly perform the connection, if necessary.

getHeaderFields() is one of those methods that will implicitly call connect() . So you need to make sure to call it after the last call to setRequestProperty() . Or just remove that line.

Unrelated note: you're missing a space after Basic .