001 /**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package org.apache.camel.component.gae.http;
018
019 import java.lang.reflect.Proxy;
020 import java.net.URI;
021 import java.net.URISyntaxException;
022 import java.net.URL;
023 import java.util.Map;
024
025 import javax.servlet.http.HttpServletRequest;
026 import javax.servlet.http.HttpServletResponse;
027
028 import com.google.appengine.api.urlfetch.HTTPRequest;
029 import com.google.appengine.api.urlfetch.HTTPResponse;
030 import com.google.appengine.api.urlfetch.URLFetchService;
031
032 import com.google.appengine.api.urlfetch.URLFetchServiceFactory;
033 import org.apache.camel.Exchange;
034 import org.apache.camel.Producer;
035 import org.apache.camel.component.gae.bind.HttpBindingInvocationHandler;
036 import org.apache.camel.component.gae.bind.InboundBinding;
037 import org.apache.camel.component.gae.bind.OutboundBinding;
038 import org.apache.camel.component.gae.bind.OutboundBindingSupport;
039 import org.apache.camel.component.http.HttpBinding;
040 import org.apache.camel.component.http.HttpClientConfigurer;
041 import org.apache.camel.component.servlet.ServletComponent;
042 import org.apache.camel.component.servlet.ServletEndpoint;
043 import org.apache.camel.util.URISupport;
044 import org.apache.camel.util.UnsafeUriCharactersEncoder;
045 import org.apache.commons.httpclient.HttpConnectionManager;
046 import org.apache.commons.httpclient.params.HttpClientParams;
047
048 /**
049 * Represents a <a href="http://camel.apache.org/ghttp.html">Google App Engine
050 * HTTP endpoint</a>.
051 */
052 public class GHttpEndpoint extends ServletEndpoint implements OutboundBindingSupport<GHttpEndpoint, HTTPRequest, HTTPResponse> {
053
054 public static final String GHTTP_SCHEME = "ghttp";
055 public static final String GHTTPS_SCHEME = "ghttps";
056
057 public static final String HTTP_SCHEME = "http";
058 public static final String HTTPS_SCHEME = "https";
059
060 private URLFetchService urlFetchService;
061
062 private OutboundBinding<GHttpEndpoint, HTTPRequest, HTTPResponse> outboundBinding;
063 private InboundBinding<GHttpEndpoint, HttpServletRequest, HttpServletResponse> inboundBinding;
064
065 public GHttpEndpoint(String endpointUri, ServletComponent component,
066 URI httpUri, HttpClientParams params,
067 HttpConnectionManager httpConnectionManager,
068 HttpClientConfigurer clientConfigurer) throws URISyntaxException {
069 // set the endpoint uri with httpUri as we need to create http producer here
070 super(httpUri.toString(), component, httpUri, params, httpConnectionManager, clientConfigurer);
071 urlFetchService = URLFetchServiceFactory.getURLFetchService();
072 }
073
074 /**
075 * Constructs a {@link URL} from an <code>uri</code> and an optional
076 * <code>query</code> string. The encoding strategy follow those of the
077 * Camel HTTP component.
078 *
079 * @param uri
080 * must be encoded with
081 * {@link UnsafeUriCharactersEncoder#encode(String)}.
082 * @param query
083 * decoded query string. Replaces the query part of
084 * <code>uri</code> if not <code>null</code>.
085 */
086 @SuppressWarnings("unchecked")
087 static URL getEndpointUrl(String uri, String query) throws Exception {
088 Map<String, Object> parameters = null;
089 URI uriObj = new URI(uri);
090 if (query == null) {
091 parameters = URISupport.parseParameters(uriObj);
092 } else {
093 parameters = URISupport.parseQuery(query);
094 }
095 if (uriObj.getScheme().equals(GHTTPS_SCHEME)) {
096 uriObj = new URI(HTTPS_SCHEME + ":" + uriObj.getRawSchemeSpecificPart());
097 } else { // ghttp or anything else
098 uriObj = new URI(HTTP_SCHEME + ":" + uriObj.getRawSchemeSpecificPart());
099 }
100 return URISupport.createRemainingURI(uriObj, (Map)parameters).toURL();
101 }
102
103 public URL getEndpointUrl() throws Exception {
104 return getEndpointUrl(getEndpointUri(), null);
105 }
106
107 public URLFetchService getUrlFetchService() {
108 return urlFetchService;
109 }
110
111 public void setUrlFetchService(URLFetchService urlFetchService) {
112 this.urlFetchService = urlFetchService;
113 }
114
115 public OutboundBinding<GHttpEndpoint, HTTPRequest, HTTPResponse> getOutboundBinding() {
116 return outboundBinding;
117 }
118
119 public void setOutboundBinding(OutboundBinding<GHttpEndpoint, HTTPRequest, HTTPResponse> outboundBinding) {
120 this.outboundBinding = outboundBinding;
121 }
122
123 public InboundBinding<GHttpEndpoint, HttpServletRequest, HttpServletResponse> getInboundBinding() {
124 return inboundBinding;
125 }
126
127 public void setInboundBinding(
128 InboundBinding<GHttpEndpoint, HttpServletRequest, HttpServletResponse> inboundBinding) {
129 this.inboundBinding = inboundBinding;
130 }
131
132 /**
133 * Proxies the {@link HttpBinding} returned by {@link super#getBinding()}
134 * with a dynamic proxy. The proxy's invocation handler further delegates to
135 * {@link InboundBinding#readRequest(org.apache.camel.Endpoint, Exchange, Object)}
136 * .
137 *
138 * @return proxied {@link HttpBinding}.
139 */
140 @Override
141 public HttpBinding getBinding() {
142 return (HttpBinding)Proxy.newProxyInstance(getClass().getClassLoader(), new Class[] {HttpBinding.class},
143 new HttpBindingInvocationHandler<GHttpEndpoint, HttpServletRequest, HttpServletResponse>(
144 this, super.getBinding(), getInboundBinding()));
145 }
146
147 public Producer createProducer() throws Exception {
148 return new GHttpProducer(this);
149 }
150
151 @Override
152 public boolean isLenientProperties() {
153 // GHttpEndpoint could not know about all it's options on the passed URI
154 return true;
155 }
156
157 }