/**
* 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.
*/
package org.apache.camel.component.http;
import java.io.IOException;
import java.io.InputStream;
import org.apache.camel.Message;
import org.apache.camel.RuntimeCamelException;
import org.apache.camel.component.http.helper.LoadingByteArrayOutputStream;
import org.apache.camel.impl.PollingConsumerSupport;
import org.apache.camel.spi.HeaderFilterStrategy;
import org.apache.commons.httpclient.Header;
import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.HttpMethod;
import org.apache.commons.httpclient.methods.GetMethod;
import org.apache.commons.io.IOUtils;
/**
* A polling HTTP consumer which by default performs a GET
*
* @version $Revision: 682597 $
*/
public class HttpPollingConsumer extends PollingConsumerSupport<HttpExchange> {
private final HttpEndpoint endpoint;
private HttpClient httpClient;
public HttpPollingConsumer(HttpEndpoint endpoint) {
super(endpoint);
this.endpoint = endpoint;
httpClient = endpoint.createHttpClient();
}
public HttpExchange receive() {
return receiveNoWait();
}
public HttpExchange receive(long timeout) {
return receiveNoWait();
}
public HttpExchange receiveNoWait() {
HttpExchange exchange = endpoint.createExchange();
HttpMethod method = createMethod();
try {
int responseCode = httpClient.executeMethod(method);
// lets store the result in the output message.
LoadingByteArrayOutputStream bos = new LoadingByteArrayOutputStream();
InputStream is = method.getResponseBodyAsStream();
IOUtils.copy(is, bos);
bos.flush();
is.close();
Message message = exchange.getIn();
message.setBody(bos.createInputStream());
// lets set the headers
Header[] headers = method.getResponseHeaders();
HeaderFilterStrategy strategy = endpoint.getHeaderFilterStrategy();
for (Header header : headers) {
String name = header.getName();
String value = header.getValue();
if (strategy != null && !strategy.applyFilterToExternalHeaders(name, value)) {
message.setHeader(name, value);
}
}
message.setHeader("http.responseCode", responseCode);
return exchange;
} catch (IOException e) {
throw new RuntimeCamelException(e);
} finally {
method.releaseConnection();
}
}
// Properties
//-------------------------------------------------------------------------
public HttpClient getHttpClient() {
return httpClient;
}
public void setHttpClient(HttpClient httpClient) {
this.httpClient = httpClient;
}
// Implementation methods
//-------------------------------------------------------------------------
protected HttpMethod createMethod() {
String uri = endpoint.getEndpointUri();
return new GetMethod(uri);
}
protected void doStart() throws Exception {
}
protected void doStop() throws Exception {
}
}