Apache HttpComponents Core HTTP/1.1 5.2.4 · org.apache.hc.core5.http.impl.DefaultConnectionReuseStrategy

Default implementation of a strategy deciding about connection re-use. The strategy determines whether a connection is persistent or not based on the message’s protocol version and Connection header field if present. Connections will not be re-used and will close if any of these conditions is met

the close connection option is present in the request message
the response message content body is incorrectly or ambiguously delineated
the close connection option is present in the response message
If the received protocol is HTTP/1.0 (or earlier) and keep-alive connection option is not present

In the absence of a Connection header field, the non-standard but commonly used Proxy-Connection header field will be used instead. If no connection options are explicitly given the default policy for the HTTP version is applied. HTTP/1.1 (or later) connections are re-used by default. HTTP/1.0 (or earlier) connections are not re-used by default.

Field Summary

Modifier and Type	Field and Description
public static final DefaultConnectionReuseStrategy	INSTANCE

Constructor Summary

Access	Constructor and Description
public	DefaultConnectionReuseStrategy()

Method Summary

Modifier and Type	Method and Description
public boolean	keepAlive(final HttpRequest The last request transmitted over that connection. request, final HttpResponse The last response transmitted over that connection. response, final HttpContext the context in which the connection is being used. context) Implements org.apache.hc.core5.http.ConnectionReuseStrategy.keepAlive. Decides whether a connection can be kept open after a request.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

Field Detail

INSTANCE	back to summary
public static final DefaultConnectionReuseStrategy INSTANCE

Constructor Detail

DefaultConnectionReuseStrategy	back to summary
public DefaultConnectionReuseStrategy()

Method Detail

keepAlive back to summary

keepAlive	back to summary
public boolean keepAlive(final HttpRequest request, final HttpResponse response, final HttpContext context) Implements org.apache.hc.core5.http.ConnectionReuseStrategy.keepAlive. Doc from org.apache.hc.core5.http.ConnectionReuseStrategy.keepAlive. Decides whether a connection can be kept open after a request. If this method returns `false`, the caller MUST close the connection to correctly comply with the HTTP protocol. If it returns `true`, the caller SHOULD attempt to keep the connection open for reuse with another request. One can use the HTTP context to retrieve additional objects that may be relevant for the keep-alive strategy: the actual HTTP connection, the original HTTP request, target host if known, number of times the connection has been reused already and so on. If the connection is already closed, `false` is returned. The stale connection check MUST NOT be triggered by a connection reuse strategy. Parameters request:HttpRequest The last request transmitted over that connection. response:HttpResponse The last response transmitted over that connection. context:HttpContext the context in which the connection is being used. Returns:boolean `true` if the connection is allowed to be reused, or `false` if it MUST NOT be reused Annotations @Override

public boolean keepAlive(final HttpRequest request, final HttpResponse response, final HttpContext context)

Implements org.apache.hc.core5.http.ConnectionReuseStrategy.keepAlive.

Doc from org.apache.hc.core5.http.ConnectionReuseStrategy.keepAlive.

Decides whether a connection can be kept open after a request. If this method returns false, the caller MUST close the connection to correctly comply with the HTTP protocol. If it returns true, the caller SHOULD attempt to keep the connection open for reuse with another request.

One can use the HTTP context to retrieve additional objects that may be relevant for the keep-alive strategy: the actual HTTP connection, the original HTTP request, target host if known, number of times the connection has been reused already and so on.

If the connection is already closed, false is returned. The stale connection check MUST NOT be triggered by a connection reuse strategy.

Parameters

request:HttpRequest: The last request transmitted over that connection.
response:HttpResponse: The last response transmitted over that connection.
context:HttpContext: the context in which the connection is being used.

Returns:boolean

true if the connection is allowed to be reused, or false if it MUST NOT be reused

Annotations

@Override