DefaultClientConnection Class Reference

Default implementation of an operated client connection. More...

Inheritance diagram for DefaultClientConnection:

Description

Author

Roland Weber

Version

Revision

673450

Date

2008-07-02 10:35:05 -0700 (Wed, 02 Jul 2008)

Since

4.0

Notice

The following notice applies to the original API on which this API is based, and to its documentation. The documentation of this API has been revised from the original.

/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

Public Member Functions
final HttpHost	getTargetHost ()
	Obtains the target host for this connection. More...
final boolean	isSecure ()
	Indicates whether this connection is secure. More...
final Socket	getSocket ()
	Obtains the socket for this connection. More...
void	opening (Socket sock, HttpHost target) throws IOException
	Signals that this connection is in the process of being open. More...
void	openCompleted (boolean secure, HttpParams params) throws IOException
	Signals that the connection has been successfully open. More...
void	shutdown () throws IOException
	Force-closes this connection. More...
void	close () throws IOException
	Closes this connection gracefully. More...
void	update (Socket sock, HttpHost target, boolean secure, HttpParams params) throws IOException
	Updates this connection. More...
HttpResponse	receiveResponseHeader () throws HttpException, IOException
	Receives the request line and headers of the next response available from this connection. More...
void	sendRequestHeader (HttpRequest request) throws HttpException, IOException
	Sends the request line and all headers over the connection. More...
Public Member Functions inherited from HttpClientConnection
boolean	isResponseAvailable (int timeout) throws IOException
	Checks if response data is available from the connection. More...
void	sendRequestEntity (HttpEntityEnclosingRequest request) throws HttpException, IOException
	Sends the request entity over the connection. More...
void	receiveResponseEntity (HttpResponse response) throws HttpException, IOException
	Receives the next response entity available from this connection and attaches it to an existing HttpResponse object. More...
void	flush () throws IOException
	Writes out all pending buffered data over the open connection. More...
Public Member Functions inherited from HttpConnection
boolean	isOpen ()
	Checks if this connection is open. More...
boolean	isStale ()
	Checks whether this connection has gone down. More...
void	setSocketTimeout (int timeout)
	Sets the socket timeout value. More...
int	getSocketTimeout ()
	Returns the socket timeout value. More...
HttpConnectionMetrics	getMetrics ()
	Returns a collection of connection metrcis. More...

Public Attributes
String	sessionId
	Just for debug purpose. More...

Member Function Documentation

getTargetHost()

final HttpHost getTargetHost

(

)

If the connection is to a proxy but not tunnelled, this is the proxy. If the connection is tunnelled through a proxy, this is the target of the tunnel.
The return value is well-defined only while the connection is open. It may change even while the connection is open, because of an update .

Returns

the host to which this connection is opened

Implements OperatedClientConnection.

isSecure()

final boolean isSecure

(

)

The return value is well-defined only while the connection is open. It may change even while the connection is open, because of an update .

Returns

true if this connection is secure, false otherwise

Implements OperatedClientConnection.

getSocket()

final Socket getSocket

(

)

The return value is well-defined only while the connection is open. It may change even while the connection is open, because of an update .

Returns

the socket for communicating with the target host

Implements OperatedClientConnection.

opening()

void opening	(	Socket	sock,
		HttpHost	target
	)		throws IOException

By calling this method, you can provide the connection with the unconnected socket that will be connected before openCompleted is called. This allows the connection to close that socket if shutdown is called before it is open. Closing the unconnected socket will interrupt a thread that is blocked on the connect. Otherwise, that thread will either time out on the connect, or it returns successfully and then opens this connection which was just shut down.
You also must call openCompleted in order to complete the process

Parameters

sock	the unconnected socket which is about to be connected.
target	the target host of this connection

Implements OperatedClientConnection.

openCompleted()

void openCompleted	(	boolean	secure,
		HttpParams	params
	)		throws IOException

An attempt to call this method on an open connection will cause an exception.

Parameters

secure	true if this connection is secure, for example if an SSLSocket is used, or false if it is not secure
params	parameters for this connection. The parameters will be used when creating dependent objects, for example to determine buffer sizes.

Implements OperatedClientConnection.

shutdown()

void shutdown

(

)

throws IOException

If the connection is still in the process of being open (the method opening was already called but openCompleted was not), the associated socket that is being connected to a remote address will be closed. That will interrupt a thread that is blocked on connecting the socket. If the connection is not yet open, this will prevent the connection from being opened.

Exceptions

IOException

in case of a problem

Implements HttpConnection.

close()

void close

(

)

throws IOException

This method will attempt to flush the transmitter's internal buffer prior to closing the underlying socket. This method MUST NOT be called from a different thread to force shutdown of the connection. Use shutdown instead.

Implements HttpConnection.

update()

void update	(	Socket	sock,
		HttpHost	target,
		boolean	secure,
		HttpParams	params
	)		throws IOException

A connection can be updated only while it is open. Updates are used for example when a tunnel has been established, or when a TLS/SSL connection has been layered on top of a plain socket connection.
Note: Updating the connection will not close the previously used socket. It is the caller's responsibility to close that socket if it is no longer required.

Parameters

sock	the new socket for communicating with the target host, or null to continue using the old socket. If null is passed, helper objects that depend on the socket should be re-used. In that case, some changes in the parameters will not take effect.
target	the new target host of this connection
secure	true if this connection is now secure, false if it is not secure
params	new parameters for this connection

Implements OperatedClientConnection.

receiveResponseHeader()

HttpResponse receiveResponseHeader

(

)

throws HttpException, IOException

The caller should examine the HttpResponse object to find out if it should try to receive a response entity as well.

Returns

a new HttpResponse object with status line and headers initialized.

Exceptions

HttpException
IOException

Implements HttpClientConnection.

sendRequestHeader()

void sendRequestHeader

(

HttpRequest

request

)

throws HttpException, IOException

Parameters

request

the request whose headers to send.

Exceptions

HttpException
IOException

Implements HttpClientConnection.

Member Data Documentation

sessionId

String sessionId

We output this into logs