Package org.apache.hc.client5.http.impl.classic

Default HTTP client implementation.

See: Description

Class Summary

Class	Description
AbstractHttpClientResponseHandler<T>	A generic HttpClientResponseHandler that works with the response entity for successful (2xx) responses.
AIMDBackoffManager	The AIMDBackoffManager applies an additive increase, multiplicative decrease (AIMD) to managing a dynamic limit to the number of connections allowed to a given host.
BasicHttpClientResponseHandler	A HttpClientResponseHandler that returns the response body as a String for successful (2xx) responses.
ClassicRequestCopier
CloseableHttpClient	Base implementation of HttpClient that also implements Closeable.
CloseableHttpResponse	Backward compatibility with HttpClient 4.x.
ConnectExec	Request executor in the HTTP request execution chain that is responsible for establishing connection to the target origin server as specified by the current route.
ContentCompressionExec	Request executor in the request execution chain that is responsible for automatic response content decompression.
DefaultBackoffStrategy	This ConnectionBackoffStrategy backs off either for a raw network socket or connection timeout or if the server explicitly sends a 503 (Service Unavailable) response.
FutureRequestExecutionMetrics	Collection of different counters used to gather metrics for FutureRequestExecutionService.
FutureRequestExecutionService	HttpAsyncClientWithFuture wraps calls to execute with a HttpRequestFutureTask and schedules them using the provided executor service.
HttpClientBuilder	Builder for CloseableHttpClient instances.
HttpClients	Factory methods for CloseableHttpClient instances.
HttpRequestFutureTask<V>	FutureTask implementation that wraps a HttpAsyncClientCallable and exposes various task specific metrics.
MinimalHttpClient	Internal class.
NullBackoffStrategy	This is a ConnectionBackoffStrategy that never backs off, for compatibility with existing behavior.
ProxyClient	ProxyClient can be used to establish a tunnel via an HTTP proxy.

Exception Summary

Exception	Description
RequestAbortedException	Signals that the request has been aborted.
RequestFailedException	Signals that the request has been aborted or failed due to an expected condition.

Package org.apache.hc.client5.http.impl.classic Description

Default HTTP client implementation.

The usual execution flow can be demonstrated by the code snippet below:

 CloseableHttpClient httpclient = HttpClients.createDefault();
 try {
      HttpGet httpGet = new HttpGet("http://targethost/homepage");
      CloseableHttpResponse response = httpclient.execute(httpGet);
      try {
          System.out.println(response.getStatusLine());
          HttpEntity entity = response.getEntity();
          // do something useful with the response body
          // and ensure it is fully consumed
          EntityUtils.consume(entity);
      } finally {
          response.close();
      }
 } finally {
      httpclient.close();
 }