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Apache HttpComponents Client
/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* socketFactoryRegistry;
private final SchemePortResolver schemePortResolver;
private final DnsResolver dnsResolver;
HttpClientConnectionOperator(
final Lookup socketFactoryRegistry,
final SchemePortResolver schemePortResolver,
final DnsResolver dnsResolver) {
super();
Args.notNull(socketFactoryRegistry, "Socket factory registry");
this.socketFactoryRegistry = socketFactoryRegistry;
this.schemePortResolver = schemePortResolver != null ? schemePortResolver :
DefaultSchemePortResolver.INSTANCE;
this.dnsResolver = dnsResolver != null ? dnsResolver :
SystemDefaultDnsResolver.INSTANCE;
}
@SuppressWarnings("unchecked")
private Lookup getSocketFactoryRegistry(final HttpContext context) {
Lookup reg = (Lookup)
context.getAttribute(HttpClientContext.SOCKET_FACTORY_REGISTRY);
if (reg == null) {
reg = this.socketFactoryRegistry;
}
return reg;
}
public void connect(
final ManagedHttpClientConnection conn,
final HttpHost host,
final InetSocketAddress localAddress,
final int connectTimeout,
final SocketConfig socketConfig,
final HttpContext context) throws IOException {
final Lookup registry = getSocketFactoryRegistry(context);
final ConnectionSocketFactory sf = registry.lookup(host.getSchemeName());
if (sf == null) {
throw new IOException("Unsupported scheme: " + host.getSchemeName());
}
final InetAddress[] addresses = this.dnsResolver.resolve(host.getHostName());
final int port = this.schemePortResolver.resolve(host);
for (int i = 0; i < addresses.length; i++) {
final InetAddress address = addresses[i];
final boolean last = i == addresses.length - 1;
Socket sock = sf.createSocket(context);
sock.setReuseAddress(socketConfig.isSoReuseAddress());
conn.bind(sock);
final InetSocketAddress remoteAddress = new InetSocketAddress(address, port);
if (this.log.isDebugEnabled()) {
this.log.debug("Connecting to " + remoteAddress);
}
try {
sock.setSoTimeout(socketConfig.getSoTimeout());
sock = sf.connectSocket(
connectTimeout, sock, host, remoteAddress, localAddress, context);
sock.setTcpNoDelay(socketConfig.isTcpNoDelay());
sock.setKeepAlive(socketConfig.isSoKeepAlive());
final int linger = socketConfig.getSoLinger();
if (linger >= 0) {
sock.setSoLinger(linger > 0, linger);
}
conn.bind(sock);
return;
} catch (final ConnectException ex) {
if (last) {
throw new HttpHostConnectException(host, ex);
}
} catch (final ConnectTimeoutException ex) {
if (last) {
throw ex;
}
}
if (this.log.isDebugEnabled()) {
this.log.debug("Connect to " + remoteAddress + " timed out. " +
"Connection will be retried using another IP address");
}
}
}
public void upgrade(
final ManagedHttpClientConnection conn,
final HttpHost host,
final HttpContext context) throws IOException {
final HttpClientContext clientContext = HttpClientContext.adapt(context);
final Lookup registry = getSocketFactoryRegistry(clientContext);
ConnectionSocketFactory sf = registry.lookup(host.getSchemeName());
if (sf == null) {
sf = PlainSocketFactory.INSTANCE;
}
Asserts.check(sf instanceof LayeredConnectionSocketFactory,
"Socket factory must implement LayeredConnectionSocketFactory");
final LayeredConnectionSocketFactory lsf = (LayeredConnectionSocketFactory) sf;
Socket sock = conn.getSocket();
try {
final int port = this.schemePortResolver.resolve(host);
sock = lsf.createLayeredSocket(sock, host.getHostName(), port, context);
} catch (final ConnectException ex) {
throw new HttpHostConnectException(host, ex);
}
conn.bind(sock);
}
}