HttpURLConnection 已经连接

Question

我正在尝试复制这个，the copy sentence from openstack swift v1（效果很好）：

curl -i $publicURL/GXPrueba/StorageAPI/PruebaStorageCopy.png -X PUT -H "X-Auth-Token:  $token" -H "X-Copy-From: /GXPrueba/StorageAPI/PruebaStorage.png" -H "Content-Length: 0"

像这样：

private void copy(String originContainer, String origin, String destinationContainer, String destination) {
    try {
        URL url = new URL(storageUrl + DELIMITER + destinationContainer + DELIMITER + destination);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        conn.setDoInput(true);
        conn.setDoOutput(true);
        conn.setRequestMethod("PUT");
        conn.setRequestProperty("X-Auth-Token", authToken);
        conn.setRequestProperty("X-Copy-From", DELIMITER + originContainer + DELIMITER + origin);
        conn.setRequestProperty("Content-Length", "0");

        if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
            System.err.println("Error while copying the object: " + conn.getResponseCode());
        }
        conn.disconnect();

    } catch (MalformedURLException e) {
        System.err.println("Error while copying the object: " + e.getMessage());
    } catch (IOException e) {
        System.err.println("Error while copying the object: " + e.getMessage());
    }
}

而且我每次都在不同的行收到 java.lang.IllegalStateException: Already connected 异常。我已经尝试了我找到的其他解决方案（比如删除 setDoInput），但似乎没有任何效果。

这是堆栈跟踪

Exception in thread "main" java.lang.IllegalStateException: Already connected
    at java.net.URLConnection.setDoOutput(URLConnection.java:900)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.setDoOutput(HttpsURLConnectionImpl.java:455)
    at javaapplication3.ExternalProviderBluemix.copy(ExternalProviderBluemix.java:212)
    at javaapplication3.ExternalProviderBluemix.copy(ExternalProviderBluemix.java:202)
    at javaapplication3.JavaApplication3.main(JavaApplication3.java:39)
C:\Users\lsarni\AppData\Local\NetBeans\Cache.1\executor-snippets\debug.xml:83: Java returned: 1
BUILD FAILED (total time: 24 seconds)

Answer 1

我发现这个问题的解决方案是@Sharcoux ，这解释了为什么有时它会工作得很好。

因此，要在 NetBeans 上调试时解决此问题，您需要从 watch 中删除所有使用 conn 的表达式（例如 conn.setDoOutPut() 等）。

HttpURLConnection 已经连接

HttpURLConnection Already connected

java

illegalstateexception

httpconnection

openstack-swift