使用HttpClient4.3和Solr5进行抢占式身份验证

Question

我尝试使用https://subversion.jfrog.org/jfrog/build-info/trung/build-info-client/src/main/java/org/jfrog/build/client/preemptiveHttpClient.java和Solr类对一个受Auth保护的基本Solr进行抢先身份验证，但是这些方法被否决了，所以我不知道这是否是一个问题。情况是，在Solr中查询很好，但对于索引，我在与服务器对话时发现了IOException:example.com:8983/Solr/core1。

HttpSolrClient构造函数需要一个httpClient作为参数来执行抢占式授权，因此对于上面的类，由于httpClient存储在一个私有变量中，我在该变量上使用了一个getter来获取httpClient并传递给HttpSolrClient构造函数。我也不确定我做得对不对。

PreemptiveAuthenticate preemp = new PreemptiveAuthenticate("username", "password", 1);
    DefaultHttpClient httpClient = preemp.getHttpClient();
    System.out.println("Made it to connectSolr after set Authentication");
    SolrClient solr = new HttpSolrClient(urlString, httpClient);

我知道http://hc.apache.org/httpcomponents-client-ga/tutorial/html/authentication.html示例4.6使用HttpClient 4.3进行抢先授权，但这是一个测试用例，我看不到通过HttpClient进行抢先授权的方法。

Answer 1

修正Paulius的代码，对HttpClient4.3进行抢先身份验证。在类中创建方法，当需要连接到Solr时调用createHttpClient。

public static HttpClient createHttpClient(String username, String password) {
    if (username == null) {
        username = "";
    }
    if (password == null) {
        password = "";
    }
    HttpClientBuilder clientBuilder = HttpClientBuilder.create();

    BasicCredentialsProvider provider = new BasicCredentialsProvider();
    provider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password));

    clientBuilder.setDefaultCredentialsProvider(provider);
    clientBuilder.addInterceptorFirst(new PreemptiveAuthInterceptor());
    return clientBuilder.build();
}

static class PreemptiveAuthInterceptor implements HttpRequestInterceptor {
    @Override
    public void process (HttpRequest request, HttpContext context) throws HttpException {
        AuthState authState = (AuthState) context.getAttribute(HttpClientContext.TARGET_AUTH_STATE);
        if (authState.getAuthScheme() == null) {
            CredentialsProvider credsProvider = (CredentialsProvider) context.getAttribute(HttpClientContext.CREDS_PROVIDER);
            HttpHost targetHost = (HttpHost) context.getAttribute(HttpCoreContext.HTTP_TARGET_HOST);
            Credentials credentials = credsProvider.getCredentials(new AuthScope(targetHost.getHostName(), targetHost.getPort()));
            if (credentials == null) {
                throw new HttpException("No credentials provided for preemptive authentication.");
            }
            authState.update(new BasicScheme(), credentials);
        }
    }
}