1 /* 2 * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/protocol/HttpService.java $ 3 * $Revision: 610763 $ 4 * $Date: 2008-01-10 04:01:13 -0800 (Thu, 10 Jan 2008) $ 5 * 6 * ==================================================================== 7 * Licensed to the Apache Software Foundation (ASF) under one 8 * or more contributor license agreements. See the NOTICE file 9 * distributed with this work for additional information 10 * regarding copyright ownership. The ASF licenses this file 11 * to you under the Apache License, Version 2.0 (the 12 * "License"); you may not use this file except in compliance 13 * with the License. You may obtain a copy of the License at 14 * 15 * http://www.apache.org/licenses/LICENSE-2.0 16 * 17 * Unless required by applicable law or agreed to in writing, 18 * software distributed under the License is distributed on an 19 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 20 * KIND, either express or implied. See the License for the 21 * specific language governing permissions and limitations 22 * under the License. 23 * ==================================================================== 24 * 25 * This software consists of voluntary contributions made by many 26 * individuals on behalf of the Apache Software Foundation. For more 27 * information on the Apache Software Foundation, please see 28 * <http://www.apache.org/>. 29 * 30 */ 31 32 package org.apache.http.protocol; 33 34 import java.io.IOException; 35 36 import org.apache.http.ConnectionReuseStrategy; 37 import org.apache.http.HttpEntity; 38 import org.apache.http.HttpEntityEnclosingRequest; 39 import org.apache.http.HttpException; 40 import org.apache.http.HttpRequest; 41 import org.apache.http.HttpResponse; 42 import org.apache.http.HttpResponseFactory; 43 import org.apache.http.HttpServerConnection; 44 import org.apache.http.HttpStatus; 45 import org.apache.http.HttpVersion; 46 import org.apache.http.MethodNotSupportedException; 47 import org.apache.http.ProtocolException; 48 import org.apache.http.ProtocolVersion; 49 import org.apache.http.UnsupportedHttpVersionException; 50 import org.apache.http.entity.ByteArrayEntity; 51 import org.apache.http.params.HttpParams; 52 import org.apache.http.params.DefaultedHttpParams; 53 import org.apache.http.util.EncodingUtils; 54 55 /** 56 * Minimalistic server-side implementation of an HTTP processor. 57 * 58 * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a> 59 * 60 * @version $Revision: 610763 $ 61 */ 62 public class HttpService { 63 64 private HttpParams params = null; 65 private HttpProcessor processor = null; 66 private HttpRequestHandlerResolver handlerResolver = null; 67 private ConnectionReuseStrategy connStrategy = null; 68 private HttpResponseFactory responseFactory = null; 69 private HttpExpectationVerifier expectationVerifier = null; 70 71 /** 72 * Create a new HTTP service. 73 * 74 * @param proc the processor to use on requests and responses 75 * @param connStrategy the connection reuse strategy 76 * @param responseFactory the response factory 77 */ 78 public HttpService( 79 final HttpProcessor proc, 80 final ConnectionReuseStrategy connStrategy, 81 final HttpResponseFactory responseFactory) { 82 super(); 83 setHttpProcessor(proc); 84 setConnReuseStrategy(connStrategy); 85 setResponseFactory(responseFactory); 86 } 87 88 public void setHttpProcessor(final HttpProcessor processor) { 89 if (processor == null) { 90 throw new IllegalArgumentException("HTTP processor may not be null."); 91 } 92 this.processor = processor; 93 } 94 95 public void setConnReuseStrategy(final ConnectionReuseStrategy connStrategy) { 96 if (connStrategy == null) { 97 throw new IllegalArgumentException("Connection reuse strategy may not be null"); 98 } 99 this.connStrategy = connStrategy; 100 } 101 102 public void setResponseFactory(final HttpResponseFactory responseFactory) { 103 if (responseFactory == null) { 104 throw new IllegalArgumentException("Response factory may not be null"); 105 } 106 this.responseFactory = responseFactory; 107 } 108 109 public void setHandlerResolver(final HttpRequestHandlerResolver handlerResolver) { 110 this.handlerResolver = handlerResolver; 111 } 112 113 public void setExpectationVerifier(final HttpExpectationVerifier expectationVerifier) { 114 this.expectationVerifier = expectationVerifier; 115 } 116 117 public HttpParams getParams() { 118 return this.params; 119 } 120 121 public void setParams(final HttpParams params) { 122 this.params = params; 123 } 124 125 public void handleRequest( 126 final HttpServerConnection conn, 127 final HttpContext context) throws IOException, HttpException { 128 129 context.setAttribute(ExecutionContext.HTTP_CONNECTION, conn); 130 131 HttpResponse response = null; 132 133 try { 134 135 HttpRequest request = conn.receiveRequestHeader(); 136 request.setParams( 137 new DefaultedHttpParams(request.getParams(), this.params)); 138 139 ProtocolVersion ver = 140 request.getRequestLine().getProtocolVersion(); 141 if (!ver.lessEquals(HttpVersion.HTTP_1_1)) { 142 // Downgrade protocol version if greater than HTTP/1.1 143 ver = HttpVersion.HTTP_1_1; 144 } 145 146 if (request instanceof HttpEntityEnclosingRequest) { 147 148 if (((HttpEntityEnclosingRequest) request).expectContinue()) { 149 response = this.responseFactory.newHttpResponse(ver, 150 HttpStatus.SC_CONTINUE, context); 151 response.setParams( 152 new DefaultedHttpParams(response.getParams(), this.params)); 153 154 if (this.expectationVerifier != null) { 155 try { 156 this.expectationVerifier.verify(request, response, context); 157 } catch (HttpException ex) { 158 response = this.responseFactory.newHttpResponse(HttpVersion.HTTP_1_0, 159 HttpStatus.SC_INTERNAL_SERVER_ERROR, context); 160 response.setParams( 161 new DefaultedHttpParams(response.getParams(), this.params)); 162 handleException(ex, response); 163 } 164 } 165 if (response.getStatusLine().getStatusCode() < 200) { 166 // Send 1xx response indicating the server expections 167 // have been met 168 conn.sendResponseHeader(response); 169 conn.flush(); 170 response = null; 171 conn.receiveRequestEntity((HttpEntityEnclosingRequest) request); 172 } 173 } else { 174 conn.receiveRequestEntity((HttpEntityEnclosingRequest) request); 175 } 176 } 177 178 if (response == null) { 179 response = this.responseFactory.newHttpResponse(ver, HttpStatus.SC_OK, context); 180 response.setParams( 181 new DefaultedHttpParams(response.getParams(), this.params)); 182 183 context.setAttribute(ExecutionContext.HTTP_REQUEST, request); 184 context.setAttribute(ExecutionContext.HTTP_RESPONSE, response); 185 186 this.processor.process(request, context); 187 doService(request, response, context); 188 } 189 190 // Make sure the request content is fully consumed 191 if (request instanceof HttpEntityEnclosingRequest) { 192 HttpEntity entity = ((HttpEntityEnclosingRequest)request).getEntity(); 193 if (entity != null) { 194 entity.consumeContent(); 195 } 196 } 197 198 } catch (HttpException ex) { 199 response = this.responseFactory.newHttpResponse 200 (HttpVersion.HTTP_1_0, HttpStatus.SC_INTERNAL_SERVER_ERROR, 201 context); 202 response.setParams( 203 new DefaultedHttpParams(response.getParams(), this.params)); 204 handleException(ex, response); 205 } 206 207 this.processor.process(response, context); 208 conn.sendResponseHeader(response); 209 conn.sendResponseEntity(response); 210 conn.flush(); 211 212 if (!this.connStrategy.keepAlive(response, context)) { 213 conn.close(); 214 } 215 } 216 217 protected void handleException(final HttpException ex, final HttpResponse response) { 218 if (ex instanceof MethodNotSupportedException) { 219 response.setStatusCode(HttpStatus.SC_NOT_IMPLEMENTED); 220 } else if (ex instanceof UnsupportedHttpVersionException) { 221 response.setStatusCode(HttpStatus.SC_HTTP_VERSION_NOT_SUPPORTED); 222 } else if (ex instanceof ProtocolException) { 223 response.setStatusCode(HttpStatus.SC_BAD_REQUEST); 224 } else { 225 response.setStatusCode(HttpStatus.SC_INTERNAL_SERVER_ERROR); 226 } 227 byte[] msg = EncodingUtils.getAsciiBytes(ex.getMessage()); 228 ByteArrayEntity entity = new ByteArrayEntity(msg); 229 entity.setContentType("text/plain; charset=US-ASCII"); 230 response.setEntity(entity); 231 } 232 233 protected void doService( 234 final HttpRequest request, 235 final HttpResponse response, 236 final HttpContext context) throws HttpException, IOException { 237 HttpRequestHandler handler = null; 238 if (this.handlerResolver != null) { 239 String requestURI = request.getRequestLine().getUri(); 240 handler = this.handlerResolver.lookup(requestURI); 241 } 242 if (handler != null) { 243 handler.handle(request, response, context); 244 } else { 245 response.setStatusCode(HttpStatus.SC_NOT_IMPLEMENTED); 246 } 247 } 248 249 } 250
