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package org.mule.transport.http; |
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|
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import org.mule.api.ExceptionPayload; |
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import org.mule.api.MuleEvent; |
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import org.mule.api.MuleException; |
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import org.mule.api.MuleMessage; |
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import org.mule.api.endpoint.OutboundEndpoint; |
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import org.mule.api.lifecycle.InitialisationException; |
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import org.mule.api.transformer.DataType; |
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import org.mule.api.transformer.Transformer; |
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import org.mule.api.transformer.TransformerException; |
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import org.mule.api.transport.DispatchException; |
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import org.mule.api.transport.OutputHandler; |
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import org.mule.endpoint.EndpointURIEndpointBuilder; |
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import org.mule.message.DefaultExceptionPayload; |
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import org.mule.transformer.TransformerChain; |
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import org.mule.transformer.types.DataTypeFactory; |
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import org.mule.transport.AbstractMessageDispatcher; |
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import org.mule.transport.http.transformers.ObjectToHttpClientMethodRequest; |
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import org.mule.util.StringUtils; |
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|
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import java.io.IOException; |
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import java.net.URI; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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|
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|
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import org.apache.commons.httpclient.Header; |
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import org.apache.commons.httpclient.HostConfiguration; |
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import org.apache.commons.httpclient.HttpClient; |
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import org.apache.commons.httpclient.HttpMethod; |
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import org.apache.commons.httpclient.methods.ByteArrayRequestEntity; |
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import org.apache.commons.httpclient.methods.EntityEnclosingMethod; |
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import org.apache.commons.httpclient.params.HttpMethodParams; |
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import org.apache.commons.httpclient.protocol.Protocol; |
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import org.apache.commons.lang.BooleanUtils; |
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|
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|
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|
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|
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public class HttpClientMessageDispatcher extends AbstractMessageDispatcher |
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{ |
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|
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|
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|
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public static final int ERROR_STATUS_CODE_RANGE_START = 400; |
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public static final int REDIRECT_STATUS_CODE_RANGE_START = 300; |
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protected final HttpConnector connector; |
60 | 0 | private volatile HttpClient client = null; |
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private final Transformer sendTransformer; |
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|
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public HttpClientMessageDispatcher(OutboundEndpoint endpoint) |
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{ |
65 | 0 | super(endpoint); |
66 | 0 | this.connector = (HttpConnector) endpoint.getConnector(); |
67 | 0 | List<Transformer> ts = connector.getDefaultOutboundTransformers(null); |
68 | 0 | if (ts.size() == 1) |
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{ |
70 | 0 | this.sendTransformer = ts.get(0); |
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} |
72 | 0 | else if (ts.size() == 0) |
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{ |
74 | 0 | this.sendTransformer = new ObjectToHttpClientMethodRequest(); |
75 | 0 | this.sendTransformer.setMuleContext(connector.getMuleContext()); |
76 | 0 | this.sendTransformer.setEndpoint(endpoint); |
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} |
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else |
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{ |
80 | 0 | this.sendTransformer = new TransformerChain(ts); |
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} |
82 | 0 | } |
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|
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@Override |
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protected void doInitialise() throws InitialisationException |
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{ |
87 | 0 | super.doInitialise(); |
88 | 0 | sendTransformer.initialise(); |
89 | 0 | } |
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|
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@Override |
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protected void doConnect() throws Exception |
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{ |
94 | 0 | if (client == null) |
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{ |
96 | 0 | client = connector.doClientConnect(); |
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} |
98 | 0 | } |
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|
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@Override |
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protected void doDisconnect() throws Exception |
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{ |
103 | 0 | client = null; |
104 | 0 | } |
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|
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@Override |
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protected void doDispatch(MuleEvent event) throws Exception |
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{ |
109 | 0 | HttpMethod httpMethod = getMethod(event); |
110 | 0 | connector.setupClientAuthorization(event, httpMethod, client, endpoint); |
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|
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try |
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{ |
114 | 0 | execute(event, httpMethod); |
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|
116 | 0 | if (returnException(event, httpMethod)) |
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{ |
118 | 0 | logger.error(httpMethod.getResponseBodyAsString()); |
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|
120 | 0 | Exception cause = new Exception(String.format("Http call returned a status of: %1d %1s", |
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httpMethod.getStatusCode(), httpMethod.getStatusText())); |
122 | 0 | throw new DispatchException(event, (OutboundEndpoint) endpoint, cause); |
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} |
124 | 0 | else if (httpMethod.getStatusCode() >= REDIRECT_STATUS_CODE_RANGE_START) |
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{ |
126 | 0 | if (logger.isInfoEnabled()) |
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{ |
128 | 0 | logger.info("Received a redirect response code: " + httpMethod.getStatusCode() + " " + httpMethod.getStatusText()); |
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} |
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} |
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} |
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finally |
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{ |
134 | 0 | httpMethod.releaseConnection(); |
135 | 0 | } |
136 | 0 | } |
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|
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protected HttpMethod execute(MuleEvent event, HttpMethod httpMethod) throws Exception |
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{ |
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|
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try |
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{ |
143 | 0 | URI uri = event.getEndpoint().getEndpointURI().getUri(); |
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|
145 | 0 | this.processCookies(event); |
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|
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|
148 | 0 | client.executeMethod(getHostConfig(uri), httpMethod); |
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|
150 | 0 | return httpMethod; |
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} |
152 | 0 | catch (IOException e) |
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{ |
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|
155 | 0 | throw new DispatchException(event, (OutboundEndpoint) endpoint, e); |
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} |
157 | 0 | catch (Exception e) |
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{ |
159 | 0 | throw new DispatchException(event, (OutboundEndpoint) endpoint, e); |
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} |
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|
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} |
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|
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protected void processCookies(MuleEvent event) |
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{ |
166 | 0 | MuleMessage msg = event.getMessage(); |
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|
168 | 0 | Object cookiesProperty = msg.getOutboundProperty(HttpConnector.HTTP_COOKIES_PROPERTY); |
169 | 0 | String cookieSpecProperty = (String) msg.getOutboundProperty(HttpConnector.HTTP_COOKIE_SPEC_PROPERTY); |
170 | 0 | processCookies(cookiesProperty, cookieSpecProperty, event); |
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|
172 | 0 | cookiesProperty = endpoint.getProperty(HttpConnector.HTTP_COOKIES_PROPERTY); |
173 | 0 | cookieSpecProperty = (String) endpoint.getProperty(HttpConnector.HTTP_COOKIE_SPEC_PROPERTY); |
174 | 0 | processCookies(cookiesProperty, cookieSpecProperty, event); |
175 | 0 | } |
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|
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private void processCookies(Object cookieObject, String policy, MuleEvent event) |
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{ |
179 | 0 | URI uri = this.getEndpoint().getEndpointURI().getUri(); |
180 | 0 | CookieHelper.addCookiesToClient(this.client, cookieObject, policy, event, uri); |
181 | 0 | } |
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|
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protected HttpMethod getMethod(MuleEvent event) throws TransformerException |
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{ |
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|
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|
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|
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|
189 | 0 | client.getHttpConnectionManager().getParams().setConnectionTimeout(event.getTimeout()); |
190 | 0 | client.getHttpConnectionManager().getParams().setSoTimeout(event.getTimeout()); |
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|
192 | 0 | MuleMessage msg = event.getMessage(); |
193 | 0 | setPropertyFromEndpoint(event, msg, HttpConnector.HTTP_CUSTOM_HEADERS_MAP_PROPERTY); |
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|
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HttpMethod httpMethod; |
196 | 0 | Object body = event.getMessage().getPayload(); |
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|
198 | 0 | if (body instanceof HttpMethod) |
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{ |
200 | 0 | httpMethod = (HttpMethod) body; |
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} |
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else |
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{ |
204 | 0 | httpMethod = (HttpMethod) sendTransformer.transform(msg); |
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} |
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|
207 | 0 | httpMethod.setFollowRedirects("true".equalsIgnoreCase((String)endpoint.getProperty("followRedirects"))); |
208 | 0 | return httpMethod; |
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} |
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|
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protected void setPropertyFromEndpoint(MuleEvent event, MuleMessage msg, String prop) |
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{ |
213 | 0 | Object o = msg.getOutboundProperty(prop); |
214 | 0 | if (o == null) |
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{ |
216 | 0 | o = event.getEndpoint().getProperty(prop); |
217 | 0 | if (o != null) |
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{ |
219 | 0 | msg.setOutboundProperty(prop, o); |
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} |
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} |
222 | 0 | } |
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|
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protected HttpMethod createEntityMethod(MuleEvent event, Object body, EntityEnclosingMethod postMethod) throws TransformerException |
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{ |
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HttpMethod httpMethod; |
227 | 0 | if (body instanceof String) |
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{ |
229 | 0 | httpMethod = (HttpMethod) sendTransformer.transform(body.toString()); |
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} |
231 | 0 | else if (body instanceof byte[]) |
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{ |
233 | 0 | byte[] buffer = event.transformMessage(DataType.BYTE_ARRAY_DATA_TYPE); |
234 | 0 | postMethod.setRequestEntity(new ByteArrayRequestEntity(buffer, event.getEncoding())); |
235 | 0 | httpMethod = postMethod; |
236 | 0 | } |
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else |
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{ |
239 | 0 | if (!(body instanceof OutputHandler)) |
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{ |
241 | 0 | body = event.transformMessage(DataTypeFactory.create(OutputHandler.class)); |
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} |
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|
244 | 0 | OutputHandler outputHandler = (OutputHandler) body; |
245 | 0 | postMethod.setRequestEntity(new StreamPayloadRequestEntity(outputHandler, event)); |
246 | 0 | postMethod.setContentChunked(true); |
247 | 0 | httpMethod = postMethod; |
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} |
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|
250 | 0 | return httpMethod; |
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} |
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|
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@Override |
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protected MuleMessage doSend(MuleEvent event) throws Exception |
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{ |
256 | 0 | HttpMethod httpMethod = getMethod(event); |
257 | 0 | connector.setupClientAuthorization(event, httpMethod, client, endpoint); |
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|
259 | 0 | httpMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new MuleHttpMethodRetryHandler()); |
260 | 0 | boolean releaseConn = false; |
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try |
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{ |
263 | 0 | httpMethod = execute(event, httpMethod); |
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|
265 | 0 | DefaultExceptionPayload ep = null; |
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|
267 | 0 | if (returnException(event, httpMethod)) |
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{ |
269 | 0 | ep = new DefaultExceptionPayload(new DispatchException(event, (OutboundEndpoint) endpoint, |
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new HttpResponseException(httpMethod.getStatusText(), httpMethod.getStatusCode()))); |
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} |
272 | 0 | else if (httpMethod.getStatusCode() >= REDIRECT_STATUS_CODE_RANGE_START) |
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{ |
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try |
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{ |
276 | 0 | return handleRedirect(httpMethod, event); |
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} |
278 | 0 | catch (Exception e) |
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{ |
280 | 0 | ep = new DefaultExceptionPayload(new DispatchException(event, (OutboundEndpoint) endpoint, e)); |
281 | 0 | return getResponseFromMethod(httpMethod, ep); |
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} |
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} |
284 | 0 | releaseConn = httpMethod.getResponseBodyAsStream() == null; |
285 | 0 | return getResponseFromMethod(httpMethod, ep); |
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} |
287 | 0 | catch (Exception e) |
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{ |
289 | 0 | releaseConn = true; |
290 | 0 | if (e instanceof DispatchException) |
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{ |
292 | 0 | throw (DispatchException) e; |
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} |
294 | 0 | throw new DispatchException(event, (OutboundEndpoint) endpoint, e); |
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} |
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finally |
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{ |
298 | 0 | if (releaseConn) |
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{ |
300 | 0 | httpMethod.releaseConnection(); |
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} |
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} |
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} |
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|
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protected MuleMessage handleRedirect(HttpMethod method, MuleEvent event) throws HttpResponseException, MuleException, IOException |
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{ |
307 | 0 | String followRedirects = (String)endpoint.getProperty("followRedirects"); |
308 | 0 | if (followRedirects==null || "false".equalsIgnoreCase(followRedirects)) |
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{ |
310 | 0 | if (logger.isInfoEnabled()) |
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{ |
312 | 0 | logger.info("Received a redirect, but followRedirects=false. Response code: " + method.getStatusCode() + " " + method.getStatusText()); |
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} |
314 | 0 | return getResponseFromMethod(method, null); |
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} |
316 | 0 | Header locationHeader = method.getResponseHeader(HttpConstants.HEADER_LOCATION); |
317 | 0 | if (locationHeader == null) |
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{ |
319 | 0 | throw new HttpResponseException(method.getStatusText(), method.getStatusCode()); |
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} |
321 | 0 | OutboundEndpoint out = new EndpointURIEndpointBuilder(locationHeader.getValue(), |
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connector.getMuleContext()).buildOutboundEndpoint(); |
323 | 0 | MuleEvent result = out.process(event); |
324 | 0 | if (result != null) |
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{ |
326 | 0 | return result.getMessage(); |
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} |
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else |
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{ |
330 | 0 | return null; |
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} |
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} |
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|
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protected MuleMessage getResponseFromMethod(HttpMethod httpMethod, ExceptionPayload ep) |
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throws IOException, MuleException |
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{ |
337 | 0 | MuleMessage message = createMuleMessage(httpMethod); |
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|
339 | 0 | if (logger.isDebugEnabled()) |
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{ |
341 | 0 | logger.debug("Http response is: " + message.getOutboundProperty(HttpConnector.HTTP_STATUS_PROPERTY)); |
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} |
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|
344 | 0 | message.setExceptionPayload(ep); |
345 | 0 | return message; |
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} |
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|
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protected boolean returnException(MuleEvent event, HttpMethod httpMethod) |
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{ |
350 | 0 | String disableCheck = event.getMessage().getInvocationProperty(HttpConnector.HTTP_DISABLE_STATUS_CODE_EXCEPTION_CHECK); |
351 | 0 | if (disableCheck == null) |
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{ |
353 | 0 | disableCheck = event.getMessage().getOutboundProperty(HttpConnector.HTTP_DISABLE_STATUS_CODE_EXCEPTION_CHECK); |
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} |
355 | 0 | return httpMethod.getStatusCode() >= ERROR_STATUS_CODE_RANGE_START |
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&& !BooleanUtils.toBoolean(disableCheck); |
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} |
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|
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protected HostConfiguration getHostConfig(URI uri) throws Exception |
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{ |
361 | 0 | Protocol protocol = Protocol.getProtocol(uri.getScheme().toLowerCase()); |
362 | |
|
363 | 0 | String host = uri.getHost(); |
364 | 0 | int port = uri.getPort(); |
365 | 0 | HostConfiguration config = new HostConfiguration(); |
366 | 0 | config.setHost(host, port, protocol); |
367 | 0 | if (StringUtils.isNotBlank(connector.getProxyHostname())) |
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{ |
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|
370 | 0 | config.setProxy(connector.getProxyHostname(), connector.getProxyPort()); |
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} |
372 | 0 | return config; |
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} |
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|
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@Override |
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protected void doDispose() |
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{ |
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|
379 | 0 | } |
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|
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} |