# Package org.apache.hc.client5.http

Client component APIs common to all client transports such as connection route information and resolution as well as common HTTP method definitions and exception classes.

See: Description

Interface Summary
Interface | Description
--- | ---
AuthenticationStrategy | Strategy to select auth schemes in order of preference based on auth challenges presented by the opposite endpoint (target server or a proxy).
ConnectionKeepAliveStrategy | Interface for deciding how long a connection can remain idle before being reused.
DnsResolver | Users may implement this interface to override the normal DNS lookup offered by the OS.
HttpRequestRetryStrategy | Strategy interface that allows API users to plug in their own logic to control whether or not a retry should automatically be done, how many times it should be done and so on.
RouteInfo | Connection route information.
SchemePortResolver | Strategy for default port resolution for protocol schemes.
UserTokenHandler | A handler for determining if the given execution context is user specific or not.

Class Summary
Class | Description
--- | ---
ConnectExceptionSupport | Connect exception support methods.
HttpRoute | Connection route definition for HTTP requests.
RouteTracker | Helps tracking the steps in establishing a route.
SystemDefaultDnsResolver | DNS resolver that uses the default OS implementation for resolving host names.

Enum Summary
Enum | Description
--- | ---
RouteInfo.LayerType | The layering type of a route.
RouteInfo.TunnelType | The tunnelling type of a route.

Exception Summary
Exception | Description
--- | ---
CircularRedirectException | Signals a circular redirect
ClientProtocolException | Signals an error in the HTTP protocol.
ConnectTimeoutException | A timeout while connecting to an HTTP server or waiting for an available connection from a connection manager.
HttpHostConnectException | A `ConnectException` that specifies the `NamedEndpoint` that was being connected to.
HttpResponseException | Signals a non 2xx HTTP response.
RedirectException | Signals violation of HTTP specification caused by an invalid redirect
UnsupportedSchemeException | Signals failure to establish connection using an unknown protocol scheme.

## Package org.apache.hc.client5.http Description

Client component APIs common to all client transports such as connection route information and resolution as well as common HTTP method definitions and exception classes.