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* 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
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* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
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*
* This software consists of voluntary contributions made by many
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package org.apache.http.impl.execchain;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpException;
import org.apache.http.HttpHost;
import org.apache.http.HttpRequest;
import org.apache.http.ProtocolException;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpExecutionAware;
import org.apache.http.client.methods.HttpRequestWrapper;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.client.params.ClientPNames;
import org.apache.http.client.protocol.HttpClientContext;
import org.apache.http.client.utils.URIUtils;
import org.apache.http.conn.routing.HttpRoute;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HttpCoreContext;
import org.apache.http.protocol.HttpProcessor;
import org.apache.http.util.Args;
Request executor in the request execution chain that is responsible for implementation of HTTP specification requirements. Internally this executor relies on a HttpProcessor to populate requisite HTTP request headers, process HTTP response headers and update session state in HttpClientContext.
Further responsibilities such as communication with the opposite
endpoint is delegated to the next executor in the request execution
chain.
Since: 4.3
/**
* Request executor in the request execution chain that is responsible
* for implementation of HTTP specification requirements.
* Internally this executor relies on a {@link HttpProcessor} to populate
* requisite HTTP request headers, process HTTP response headers and update
* session state in {@link HttpClientContext}.
* <p>
* Further responsibilities such as communication with the opposite
* endpoint is delegated to the next executor in the request execution
* chain.
* </p>
*
* @since 4.3
*/
@Contract(threading = ThreadingBehavior.IMMUTABLE_CONDITIONAL)
@SuppressWarnings("deprecation")
public class ProtocolExec implements ClientExecChain {
private final Log log = LogFactory.getLog(getClass());
private final ClientExecChain requestExecutor;
private final HttpProcessor httpProcessor;
public ProtocolExec(final ClientExecChain requestExecutor, final HttpProcessor httpProcessor) {
Args.notNull(requestExecutor, "HTTP client request executor");
Args.notNull(httpProcessor, "HTTP protocol processor");
this.requestExecutor = requestExecutor;
this.httpProcessor = httpProcessor;
}
void rewriteRequestURI(
final HttpRequestWrapper request,
final HttpRoute route) throws ProtocolException {
final URI uri = request.getURI();
if (uri != null) {
try {
request.setURI(URIUtils.rewriteURIForRoute(uri, route));
} catch (final URISyntaxException ex) {
throw new ProtocolException("Invalid URI: " + uri, ex);
}
}
}
@Override
public CloseableHttpResponse execute(
final HttpRoute route,
final HttpRequestWrapper request,
final HttpClientContext context,
final HttpExecutionAware execAware) throws IOException,
HttpException {
Args.notNull(route, "HTTP route");
Args.notNull(request, "HTTP request");
Args.notNull(context, "HTTP context");
final HttpRequest original = request.getOriginal();
URI uri = null;
if (original instanceof HttpUriRequest) {
uri = ((HttpUriRequest) original).getURI();
} else {
final String uriString = original.getRequestLine().getUri();
try {
uri = URI.create(uriString);
} catch (final IllegalArgumentException ex) {
if (this.log.isDebugEnabled()) {
this.log.debug("Unable to parse '" + uriString + "' as a valid URI; " +
"request URI and Host header may be inconsistent", ex);
}
}
}
request.setURI(uri);
// Re-write request URI if needed
rewriteRequestURI(request, route);
final HttpParams params = request.getParams();
HttpHost virtualHost = (HttpHost) params.getParameter(ClientPNames.VIRTUAL_HOST);
// HTTPCLIENT-1092 - add the port if necessary
if (virtualHost != null && virtualHost.getPort() == -1) {
final int port = route.getTargetHost().getPort();
if (port != -1) {
virtualHost = new HttpHost(virtualHost.getHostName(), port,
virtualHost.getSchemeName());
}
if (this.log.isDebugEnabled()) {
this.log.debug("Using virtual host" + virtualHost);
}
}
HttpHost target = null;
if (virtualHost != null) {
target = virtualHost;
} else {
if (uri != null && uri.isAbsolute() && uri.getHost() != null) {
target = new HttpHost(uri.getHost(), uri.getPort(), uri.getScheme());
}
}
if (target == null) {
target = request.getTarget();
}
if (target == null) {
target = route.getTargetHost();
}
// Get user info from the URI
if (uri != null) {
final String userinfo = uri.getUserInfo();
if (userinfo != null) {
CredentialsProvider credsProvider = context.getCredentialsProvider();
if (credsProvider == null) {
credsProvider = new BasicCredentialsProvider();
context.setCredentialsProvider(credsProvider);
}
credsProvider.setCredentials(
new AuthScope(target),
new UsernamePasswordCredentials(userinfo));
}
}
// Run request protocol interceptors
context.setAttribute(HttpCoreContext.HTTP_TARGET_HOST, target);
context.setAttribute(HttpClientContext.HTTP_ROUTE, route);
context.setAttribute(HttpCoreContext.HTTP_REQUEST, request);
this.httpProcessor.process(request, context);
final CloseableHttpResponse response = this.requestExecutor.execute(route, request,
context, execAware);
try {
// Run response protocol interceptors
context.setAttribute(HttpCoreContext.HTTP_RESPONSE, response);
this.httpProcessor.process(response, context);
return response;
} catch (final RuntimeException ex) {
response.close();
throw ex;
} catch (final IOException ex) {
response.close();
throw ex;
} catch (final HttpException ex) {
response.close();
throw ex;
}
}
}