001 /* 002 * Copyright 2000-2004 The Apache Software Foundation. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016 017 package org.apache.commons.scaffold.http; 018 019 import java.net.*; 020 import java.io.*; 021 022 023 /** 024 * A network client that reads from a HTTP URL. 025 * <P> 026 * Taken from Core Servlets and JavaServer Pages 027 * from Prentice Hall and Sun Microsystems Press, 028 * http://www.coreservlets.com/. 029 * © 2000 Marty Hall; may be freely used or adapted. 030 * <P> 031 * Adapted for general use by a servlet to read a page 032 * into a StringBuffer by Ted Husted, August 2001. 033 * 034 * @author Marty Hall 035 * @author Ted Husted 036 * @version $Revision: 155464 $ $Date: 2005-02-26 13:26:54 +0000 (Sat, 26 Feb 2005) $ 037 */ 038 public class HttpClient { 039 040 /** 041 * Retrieve indicated page, returning headers and 042 * page content. 043 * 044 * @param host 045 * @param port 046 * @param requestLine 047 * @param requestHeaders 048 * @param content 049 * @exception Catches IOException and UnknownHostException, 050 * and returns messages in content. 051 * @author Marty Hall 052 * @author Ted Husted 053 * @version $Revision: 155464 $ $Date: 2005-02-26 13:26:54 +0000 (Sat, 26 Feb 2005) $ 054 */ 055 public HttpClient( 056 String host, int port, 057 String requestLine, String[] requestHeaders, 058 StringBuffer responseHeaders, StringBuffer responseContent) 059 throws UnknownHostException,IOException { 060 061 // check host and connect - Will succeed or throw UHE 062 InetAddress.getByName(host); 063 Socket uriSocket = new Socket(host,port); 064 065 // handleConnection - May throw IOE 066 PrintWriter out = SocketUtil.getWriter(uriSocket); 067 BufferedReader in = SocketUtil.getReader(uriSocket); 068 069 // say howdy 070 out.println(requestLine); 071 072 // send any headers, and then blank 073 for(int i=0; i<requestHeaders.length; i++) { 074 if (requestHeaders[i] == null) 075 break; 076 else 077 out.println(requestHeaders[i]); 078 } 079 out.println(); 080 081 // capture response 082 String line; 083 // - headers 084 while ((line = in.readLine()) != null) { 085 responseHeaders.append(line + "\n"); 086 if ("".equals(line)) break; 087 } 088 // - content 089 while ((line = in.readLine()) != null) 090 responseContent.append(line + "\n"); 091 } 092 }