Package org.apache.http.impl.client

Default HTTP client implementation.

See: Description

Class Summary

Class	Description
AbstractAuthenticationHandler	Deprecated (4.2) use AuthenticationStrategy
AbstractHttpClient	Deprecated (4.3) use HttpClientBuilder.
AbstractResponseHandler<T>	A generic ResponseHandler 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.
AutoRetryHttpClient	Deprecated (4.3) use HttpClientBuilder.
BasicAuthCache	Default implementation of AuthCache.
BasicCookieStore	Default implementation of CookieStore
BasicCredentialsProvider	Default implementation of CredentialsProvider.
BasicResponseHandler	A ResponseHandler that returns the response body as a String for successful (2xx) responses.
ClientParamsStack	Deprecated (4.3) use configuration classes provided 'org.apache.http.config' and 'org.apache.http.client.config'
CloseableHttpClient	Base implementation of HttpClient that also implements Closeable.
ContentEncodingHttpClient	Deprecated (4.2) use HttpClientBuilder
CookieSpecRegistries
DecompressingHttpClient	Deprecated (4.3) use HttpClientBuilder
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.
DefaultClientConnectionReuseStrategy
DefaultConnectionKeepAliveStrategy	Default implementation of a strategy deciding duration that a connection can remain idle.
DefaultHttpClient	Deprecated (4.3) use HttpClientBuilder see also CloseableHttpClient.
DefaultHttpRequestRetryHandler	The default HttpRequestRetryHandler used by request executors.
DefaultProxyAuthenticationHandler	Deprecated (4.2) use ProxyAuthenticationStrategy
DefaultRedirectHandler	Deprecated (4.1) use DefaultRedirectStrategy.
DefaultRedirectStrategy	Default implementation of RedirectStrategy.
DefaultRequestDirector	Deprecated Do not use.
DefaultServiceUnavailableRetryStrategy	Default implementation of the ServiceUnavailableRetryStrategy interface.
DefaultTargetAuthenticationHandler	Deprecated (4.2) use TargetAuthenticationStrategy
DefaultUserTokenHandler	Default implementation of UserTokenHandler.
EntityEnclosingRequestWrapper	Deprecated (4.3) do not use.
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.
HttpAuthenticator	Deprecated (4.3) reserved for internal use.
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.
IdleConnectionEvictor	This class maintains a background thread to enforce an eviction policy for expired / idle persistent connections kept alive in the connection pool.
LaxRedirectStrategy	Lax RedirectStrategy implementation that automatically redirects all HEAD, GET, POST, and DELETE requests.
NoopUserTokenHandler	Noop implementation of UserTokenHandler that always returns null.
NullBackoffStrategy	This is a ConnectionBackoffStrategy that never backs off, for compatibility with existing behavior.
ProxyAuthenticationStrategy	Default AuthenticationStrategy implementation for proxy host authentication.
ProxyClient	ProxyClient can be used to establish a tunnel via an HTTP proxy.
RedirectLocations	This class represents a collection of URIs used as redirect locations.
RequestWrapper	Deprecated (4.3) do not use.
RoutedRequest	Deprecated (4.3) do not use.
StandardHttpRequestRetryHandler	HttpRequestRetryHandler which assumes that all requested HTTP methods which should be idempotent according to RFC-2616 are in fact idempotent and can be retried.
SystemDefaultCredentialsProvider	Implementation of CredentialsProvider backed by standard JRE Authenticator.
SystemDefaultHttpClient	Deprecated (4.3) use HttpClientBuilder
TargetAuthenticationStrategy	Default AuthenticationStrategy implementation for proxy host authentication.
WinHttpClients	Factory methods for CloseableHttpClient instances configured to use integrated Windows authentication by default.

Exception Summary

Exception	Description
TunnelRefusedException	Deprecated (4.3) reserved for internal use.

Package org.apache.http.impl.client 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();
 }