/**
* 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.jetty;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.Serializable;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import org.apache.camel.AsyncCallback;
import org.apache.camel.AsyncProcessor;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.component.http.HttpConstants;
import org.apache.camel.component.http.HttpMethods;
import org.apache.camel.component.http.helper.HttpHelper;
import org.apache.camel.impl.DefaultProducer;
import org.apache.camel.spi.HeaderFilterStrategy;
import org.apache.camel.util.AsyncProcessorHelper;
import org.apache.camel.util.ExchangeHelper;
import org.apache.camel.util.IOHelper;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.URISupport;
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.io.ByteArrayBuffer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @version
*/
public class JettyHttpProducer extends DefaultProducer implements AsyncProcessor {
private static final transient Logger LOG = LoggerFactory.getLogger(JettyHttpProducer.class);
private final HttpClient client;
private JettyHttpBinding binding;
public JettyHttpProducer(Endpoint endpoint, HttpClient client) {
super(endpoint);
this.client = client;
ObjectHelper.notNull(client, "HttpClient", this);
}
@Override
public JettyHttpEndpoint getEndpoint() {
return (JettyHttpEndpoint) super.getEndpoint();
}
public void process(Exchange exchange) throws Exception {
AsyncProcessorHelper.process(this, exchange);
}
public boolean process(Exchange exchange, final AsyncCallback callback) {
try {
JettyContentExchange httpExchange = createHttpExchange(exchange, callback);
doSendExchange(client, httpExchange);
} catch (Exception e) {
// error occurred before we had a chance to go async
// so set exception and invoke callback true
exchange.setException(e);
callback.done(true);
return true;
}
// we should continue processing this asynchronously
return false;
}
protected JettyContentExchange createHttpExchange(Exchange exchange, AsyncCallback callback) throws Exception {
String url = HttpHelper.createURL(exchange, getEndpoint());
HttpMethods methodToUse = HttpHelper.createMethod(exchange, getEndpoint(), exchange.getIn().getBody() != null);
String method = methodToUse.createMethod(url).getName();
LOG.trace("Using URL: {} with method: {}", url, method);
JettyContentExchange httpExchange = new JettyContentExchange(exchange, getBinding(), client);
httpExchange.setMethod(method);
httpExchange.setURL(url);
// set query parameters
doSetQueryParameters(exchange, httpExchange);
// if we post or put then set data
if (HttpMethods.POST.equals(methodToUse) || HttpMethods.PUT.equals(methodToUse)) {
String contentType = ExchangeHelper.getContentType(exchange);
if (contentType != null) {
httpExchange.setRequestContentType(contentType);
}
if (contentType != null && HttpConstants.CONTENT_TYPE_JAVA_SERIALIZED_OBJECT.equals(contentType)) {
// serialized java object
Serializable obj = exchange.getIn().getMandatoryBody(Serializable.class);
// write object to output stream
ByteArrayOutputStream bos = new ByteArrayOutputStream();
HttpHelper.writeObjectToStream(bos, obj);
httpExchange.setRequestContent(new ByteArrayBuffer(bos.toByteArray()));
IOHelper.close(bos);
} else {
// try with String at first
String data = exchange.getIn().getBody(String.class);
if (data != null) {
String charset = exchange.getProperty(Exchange.CHARSET_NAME, String.class);
if (charset != null) {
httpExchange.setRequestContent(new ByteArrayBuffer(data, charset));
} else {
httpExchange.setRequestContent(new ByteArrayBuffer(data));
}
} else {
// then fallback to input stream
InputStream is = exchange.getContext().getTypeConverter().mandatoryConvertTo(InputStream.class, exchange, exchange.getIn().getBody());
httpExchange.setRequestContentSource(is);
}
}
}
// if we bridge endpoint then we need to skip matching headers with the HTTP_QUERY to avoid sending
// duplicated headers to the receiver, so use this skipRequestHeaders as the list of headers to skip
Map<String, Object> skipRequestHeaders = null;
if (getEndpoint().isBridgeEndpoint()) {
exchange.setProperty(Exchange.SKIP_GZIP_ENCODING, Boolean.TRUE);
String queryString = exchange.getIn().getHeader(Exchange.HTTP_QUERY, String.class);
if (queryString != null) {
skipRequestHeaders = URISupport.parseQuery(queryString);
}
}
// propagate headers as HTTP headers
Message in = exchange.getIn();
HeaderFilterStrategy strategy = getEndpoint().getHeaderFilterStrategy();
for (Map.Entry<String, Object> entry : in.getHeaders().entrySet()) {
String key = entry.getKey();
Object headerValue = in.getHeader(key);
if (headerValue != null) {
// use an iterator as there can be multiple values. (must not use a delimiter, and allow empty values)
final Iterator<?> it = ObjectHelper.createIterator(headerValue, null, true);
// the values to add as a request header
final List<String> values = new ArrayList<String>();
// if its a multi value then check each value if we can add it and for multi values they
// should be combined into a single value
while (it.hasNext()) {
String value = exchange.getContext().getTypeConverter().convertTo(String.class, it.next());
// we should not add headers for the parameters in the uri if we bridge the endpoint
// as then we would duplicate headers on both the endpoint uri, and in HTTP headers as well
if (skipRequestHeaders != null && skipRequestHeaders.containsKey(key)) {
Object skipValue = skipRequestHeaders.get(key);
if (ObjectHelper.equal(skipValue, value)) {
continue;
}
}
if (value != null && strategy != null && !strategy.applyFilterToCamelHeaders(key, value, exchange)) {
values.add(value);
}
}
// add the value(s) as a http request header
if (values.size() > 0) {
// use the default toString of a ArrayList to create in the form [xxx, yyy]
// if multi valued, for a single value, then just output the value as is
String s = values.size() > 1 ? values.toString() : values.get(0);
httpExchange.addRequestHeader(key, s);
}
}
}
// set the callback, which will handle all the response logic
httpExchange.setCallback(callback);
return httpExchange;
}
@SuppressWarnings("unchecked")
private void doSetQueryParameters(Exchange exchange, JettyContentExchange httpExchange) throws URISyntaxException {
// is a query string provided in the endpoint URI or in a header (header
// overrules endpoint)
String queryString = exchange.getIn().getHeader(Exchange.HTTP_QUERY, String.class);
if (queryString == null) {
queryString = getEndpoint().getHttpUri().getQuery();
}
if (ObjectHelper.isEmpty(queryString)) {
return;
}
// okay we need to add the query string to the URI so we need to juggle a bit with the parameters
String uri = httpExchange.getRequestURI();
Map parameters = URISupport.parseParameters(new URI(uri));
parameters.putAll(URISupport.parseQuery(queryString));
if (uri.contains("?")) {
uri = ObjectHelper.before(uri, "?");
}
if (!parameters.isEmpty()) {
uri = uri + "?" + URISupport.createQueryString(parameters);
httpExchange.setRequestURI(uri);
}
}
protected static void doSendExchange(HttpClient client, JettyContentExchange httpExchange) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug("Sending HTTP request to: {}", httpExchange.getUrl());
}
client.send(httpExchange);
}
public JettyHttpBinding getBinding() {
return binding;
}
public void setBinding(JettyHttpBinding binding) {
this.binding = binding;
}
@Override
protected void doStart() throws Exception {
client.start();
super.doStart();
}
@Override
protected void doStop() throws Exception {
super.doStop();
client.stop();
}
}