HttpClient 4.2,基本身份验证和AuthScope

Question

我有一个应用程序连接到需要基本身份验证的站点.这些站点在运行时提供,在编译时不知道.

我正在使用HttpClient 4.2.

我不确定下面的代码是否应该如何指定基本身份验证,但文档会建议它.但是,我不知道在构造函数中传递什么AuthScope.我原以为null参数意味着所提供的凭据应该用于所有URL,但它会抛出一个NullPointerException,所以显然我错了.

m_client = new DefaultHttpClient();
UsernamePasswordCredentials credentials = new UsernamePasswordCredentials(m_userName, m_password);
((DefaultHttpClient)m_client).getCredentialsProvider().setCredentials(new AuthScope((HttpHost)null), credentials);

Answer 1

您正在使用AuthScope.ANY:http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/auth/AuthScope.html

试试这个:

    final HttpClient client = new HttpClient();
    client.getParams().setAuthenticationPreemptive(true);
    client.getState().setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(user.getUsername(), user.getPassword()));
    final GetMethod method = new GetMethod(uri);
    client.executeMethod(method);