java使用SolrJ设置自定义请求头

Question

我在Solr中配置了一个定制的http过滤器，它首先被调用（在org.apache.Solr.servlet.SolrDispatchFilter之前执行），用于每个到达Solr的请求。自定义筛选器在所有传入的solr请求中查找特定的请求头，只有当它存在时，才会将其发送给solr进行进一步处理

我使用SolrJ进行某些查询。在查询Solr到SolrJ时，有没有办法设置HTTP请求头

我的Solr和SorlJ版本是5.4.0

Answer 1

对此解决方案有何想法

// somewhere in my client initialization code
HttpRequestInterceptor interceptor = (HttpRequest request, HttpContext context) -> {
        request.addHeader("myheadername", "myheadervalue");
};

HttpClientUtil.addRequestInterceptor(interceptor);
HttpSolrClient solrClient = new HttpSolrClient.Builder(serverUrl).build();

我的问题/担忧与HttpClientUtil（https://solr.apache.org/docs/8_8_1/solr-solrj/org/apache/solr/client/solrj/impl/HttpClientUtil.html）中的这一评论有关

This relies on the internal HttpClient implementation and is subject to change.

WARNING: This API is experimental and might change in incompatible ways in the next release.

我还对我创建的任何后续客户端实例的任何延迟影响有疑问/担忧。这些实例也会配置相同的拦截器吗？我能做些什么来确保他们不会

Answer 2

您可以扩展HttpSolrClient创建自己的类MyHttpSolrClient，并自定义executeMethod添加自定义请求头的行为

public class MyHttpSolrClient extends HttpSolrClient {

  public MyHttpSolrClient(String baseURL) {
    super(baseURL);
  }

  public MyHttpSolrClient(String baseURL, HttpClient client) {
    super(baseURL, client);
  }

  public MyHttpSolrClient(String baseURL, HttpClient client, ResponseParser parser) {
    super(baseURL, client, parser);
  }

  protected NamedList<Object> executeMethod(HttpRequestBase method, final ResponseParser processor) throws SolrServerException {

    // **Here you add your custom header**
    method.addHeader("Name", "Value");

    return super.executeMethod(method, processor);
  }
}