Java，让CookieHandler只处理一个实例 [英] Java, let CookieHandler work on only one instance

问题描述

我不知道CookieHandler如何工作在系统范围内，我没有查看CookieHandler的来源，但发现没有更多的信息，除了get / set方法。 TCP / HTTP连接在哪里使用CookieHandler的实例，我通过

设置

  CookieHandler.setDefault（...）
  

我应该参考哪个源文件？ URLConnection & HttpURLConnection 似乎没有任何关系。

帮助，提前感谢。

---

编辑：
可以将CookieHandler仅应用于一个实例，其中 setDefault 。

<$>

解决方案

p $ p> private static class DelegatingCookieManager extends CookieManager {
@Override public void setCookiePolicy（CookiePolicy cookiePolicy）{
delegate.get（）。setCookiePolicy（cookiePolicy）;
}

@Override public CookieStore getCookieStore（）{
return delegate.get（）。getCookieStore（）;
}

@覆盖public Map< String，List< String>> get（
URI uri，Map< String，List< String>> requestHeaders）
throws IOException {
return delegate.get（）。get（uri，requestHeaders）;
}

@Override public void put（URI uri，Map< String，
List< String>> responseHeaders）
throws IOException {
delegate .get（）。put（uri，responseHeaders）;
}
}


全局安装

  static {
 CookieHandler.setDefault（new DelegatingCookieManager（））; 
} 
  

但没有状态并委托给

  private static final ThreadLocal< CookieManager> delegate = 
 new ThreadLocal< CookieManager>（）; 
  

在使用它的类中实例化

  private final CookieManager ownCookieManager = new CookieManager（）; 
  

like

  delegate.set（ownCookieManager）; 
 doRequest（）; 
  

I don't know how CookieHandler works system wide, I did view the source of CookieHandler but found no more information except the get/set methods. Where do TCP/HTTP connections use instance of CookieHandler, which I set by

CookieHandler.setDefault(...)

Which source file I should refer to? URLConnection & HttpURLConnection don't seem have things to do with it.

Help, thanks in advance.

---

Edit: Is it possible to apply CookieHandler to only one instance in which setDefault is invoked.

解决方案

I got it working by using this

private static class DelegatingCookieManager extends CookieManager {
    @Override public void setCookiePolicy(CookiePolicy cookiePolicy) {
        delegate.get().setCookiePolicy(cookiePolicy);
    }

    @Override public CookieStore getCookieStore() {
        return delegate.get().getCookieStore();
    }

    @Override public Map<String, List<String>> get(
            URI uri, Map<String, List<String>> requestHeaders)
            throws IOException {
        return delegate.get().get(uri, requestHeaders);
    }

    @Override public void put(URI uri, Map<String,
            List<String>> responseHeaders)
            throws IOException {
        delegate.get().put(uri, responseHeaders);
    }
}

which gets installed globally

static {
    CookieHandler.setDefault(new DelegatingCookieManager());
}

but has no state and delegate to a

private static final ThreadLocal<CookieManager> delegate =
     new ThreadLocal<CookieManager>();

which gets instantiated in the class where it gets used

private final CookieManager ownCookieManager = new CookieManager();

like

delegate.set(ownCookieManager);
doRequest();

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