Java tutorial
/** * Copyright (c) 2009, WSO2 Inc. (http://www.wso2.org) All Rights Reserved. * * Licensed 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.synapse.transport.passthru.util; import org.apache.axiom.om.OMOutputFormat; import org.apache.axis2.context.MessageContext; import org.apache.axis2.transport.MessageFormatter; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.http.protocol.HTTP; import org.apache.synapse.transport.nhttp.NhttpConstants; import org.apache.synapse.transport.nhttp.util.MessageFormatterDecoratorFactory; import org.apache.synapse.transport.nhttp.util.NhttpUtil; import org.apache.synapse.transport.passthru.PassThroughConstants; import org.apache.synapse.transport.passthru.Pipe; import org.apache.synapse.transport.passthru.SourceRequest; import org.apache.synapse.transport.passthru.SourceResponse; import org.apache.synapse.transport.passthru.config.SourceConfiguration; import com.ibm.wsdl.extensions.http.HTTPConstants; import java.util.Collection; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Set; public class SourceResponseFactory { private static Log log = LogFactory.getLog(SourceResponseFactory.class); public static SourceResponse create(MessageContext msgContext, SourceRequest sourceRequest, SourceConfiguration sourceConfiguration) { // determine the status code to be sent int statusCode = PassThroughTransportUtils.determineHttpStatusCode(msgContext); SourceResponse sourceResponse; String statusLine = PassThroughTransportUtils.determineHttpStatusLine(msgContext); if (msgContext.getProperty(PassThroughConstants.ORIGINAL_HTTP_SC) != null && statusCode == ((Integer) msgContext.getProperty(PassThroughConstants.ORIGINAL_HTTP_SC))) { sourceResponse = new SourceResponse(sourceConfiguration, statusCode, statusLine, sourceRequest); } else { if (msgContext.getProperty(PassThroughConstants.ORIGINAL_HTTP_REASON_PHRASE) != null && (statusLine .equals(msgContext.getProperty(PassThroughConstants.ORIGINAL_HTTP_REASON_PHRASE)))) { sourceResponse = new SourceResponse(sourceConfiguration, statusCode, sourceRequest); } else { sourceResponse = new SourceResponse(sourceConfiguration, statusCode, statusLine, sourceRequest); } } // set any transport headers Map transportHeaders = (Map) msgContext.getProperty(MessageContext.TRANSPORT_HEADERS); boolean forceContentLength = msgContext.isPropertyTrue(NhttpConstants.FORCE_HTTP_CONTENT_LENGTH); boolean forceContentLengthCopy = msgContext .isPropertyTrue(PassThroughConstants.COPY_CONTENT_LENGTH_FROM_INCOMING); if (forceContentLength && forceContentLengthCopy && msgContext.getProperty(PassThroughConstants.ORGINAL_CONTEN_LENGTH) != null) { sourceResponse.addHeader(HTTP.CONTENT_LEN, (String) msgContext.getProperty(PassThroughConstants.ORGINAL_CONTEN_LENGTH)); } // When invoking http HEAD request esb set content length as 0 to response header. Since there is no message // body content length cannot be calculated inside synapse. Hence content length of the backend response is // set to sourceResponse. if (sourceRequest != null && PassThroughConstants.HTTP_HEAD .equalsIgnoreCase(sourceRequest.getRequest().getRequestLine().getMethod()) && msgContext.getProperty(PassThroughConstants.ORGINAL_CONTEN_LENGTH) != null) { sourceResponse.addHeader(PassThroughConstants.ORGINAL_CONTEN_LENGTH, (String) msgContext.getProperty(PassThroughConstants.ORGINAL_CONTEN_LENGTH)); } if (transportHeaders != null && msgContext.getProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE) != null) { if (msgContext.getProperty(org.apache.axis2.Constants.Configuration.CONTENT_TYPE) != null && msgContext.getProperty(org.apache.axis2.Constants.Configuration.CONTENT_TYPE).toString() .contains(PassThroughConstants.CONTENT_TYPE_MULTIPART_RELATED)) { transportHeaders.put(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE, PassThroughConstants.CONTENT_TYPE_MULTIPART_RELATED); } else { Pipe pipe = (Pipe) msgContext.getProperty(PassThroughConstants.PASS_THROUGH_PIPE); if (pipe != null && !Boolean.TRUE .equals(msgContext.getProperty(PassThroughConstants.MESSAGE_BUILDER_INVOKED))) { transportHeaders.put(HTTP.CONTENT_TYPE, msgContext.getProperty(org.apache.axis2.Constants.Configuration.CONTENT_TYPE)); } } } if (transportHeaders != null) { addResponseHeader(sourceResponse, transportHeaders); } else { Boolean noEntityBody = (Boolean) msgContext.getProperty(NhttpConstants.NO_ENTITY_BODY); if (noEntityBody == null || Boolean.FALSE == noEntityBody) { OMOutputFormat format = NhttpUtil.getOMOutputFormat(msgContext); transportHeaders = new HashMap(); MessageFormatter messageFormatter = MessageFormatterDecoratorFactory .createMessageFormatterDecorator(msgContext); if (msgContext.getProperty(org.apache.axis2.Constants.Configuration.MESSAGE_TYPE) == null) { transportHeaders.put(HTTP.CONTENT_TYPE, messageFormatter.getContentType(msgContext, format, msgContext.getSoapAction())); } addResponseHeader(sourceResponse, transportHeaders); } } // Add excess response header. String excessProp = NhttpConstants.EXCESS_TRANSPORT_HEADERS; Map excessHeaders = (Map) msgContext.getProperty(excessProp); if (excessHeaders != null) { for (Iterator iterator = excessHeaders.keySet().iterator(); iterator.hasNext();) { String key = (String) iterator.next(); for (String excessVal : (Collection<String>) excessHeaders.get(key)) { sourceResponse.addHeader(key, (String) excessVal); } } } // keep alive String noKeepAlie = (String) msgContext.getProperty(PassThroughConstants.NO_KEEPALIVE); if ("true".equals(noKeepAlie)) { sourceResponse.setKeepAlive(false); } else { // If the payload is delayed for GET/HEAD/DELETE, http-core-nio will start processing request, without // waiting for the payload. Therefore the delayed payload will be appended to the next request. To avoid // that, disable keep-alive to avoid re-using the existing connection by client for the next request. if (sourceRequest != null) { String requestMethod = sourceRequest.getRequest().getRequestLine().getMethod(); if (requestMethod != null && isPayloadOptionalMethod(requestMethod.toUpperCase()) && (sourceRequest.getHeaders().containsKey(HTTP.CONTENT_LEN) || sourceRequest.getHeaders().containsKey(HTTP.TRANSFER_ENCODING))) { if (log.isDebugEnabled()) { log.debug("Disable keep-alive in the client connection : Content-length/Transfer-encoding" + " headers present for GET/HEAD/DELETE request"); } sourceResponse.setKeepAlive(false); } } } return sourceResponse; } private static void addResponseHeader(SourceResponse sourceResponse, Map transportHeaders) { for (Object entryObj : transportHeaders.entrySet()) { Map.Entry entry = (Map.Entry) entryObj; if (entry.getValue() != null && entry.getKey() instanceof String && entry.getValue() instanceof String) { sourceResponse.addHeader((String) entry.getKey(), (String) entry.getValue()); } } } private static boolean isPayloadOptionalMethod(String httpMethod) { return (PassThroughConstants.HTTP_GET.equals(httpMethod) || PassThroughConstants.HTTP_HEAD.equals(httpMethod) || PassThroughConstants.HTTP_DELETE.equals(httpMethod)); } }