1 package com.google.polo.json; 2 3 /* 4 Copyright (c) 2002 JSON.org 5 6 Permission is hereby granted, free of charge, to any person obtaining a copy 7 of this software and associated documentation files (the "Software"), to deal 8 in the Software without restriction, including without limitation the rights 9 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 copies of the Software, and to permit persons to whom the Software is 11 furnished to do so, subject to the following conditions: 12 13 The above copyright notice and this permission notice shall be included in all 14 copies or substantial portions of the Software. 15 16 The Software shall be used for Good, not Evil. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 21 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 22 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 23 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 24 SOFTWARE. 25 */ 26 27 import java.util.Iterator; 28 29 /** 30 * Convert an HTTP header to a JSONObject and back. 31 * @author JSON.org 32 * @version 2008-09-18 33 */ 34 public class HTTP { 35 36 /** Carriage return/line feed. */ 37 public static final String CRLF = "\r\n"; 38 39 /** 40 * Convert an HTTP header string into a JSONObject. It can be a request 41 * header or a response header. A request header will contain 42 * <pre>{ 43 * Method: "POST" (for example), 44 * "Request-URI": "/" (for example), 45 * "HTTP-Version": "HTTP/1.1" (for example) 46 * }</pre> 47 * A response header will contain 48 * <pre>{ 49 * "HTTP-Version": "HTTP/1.1" (for example), 50 * "Status-Code": "200" (for example), 51 * "Reason-Phrase": "OK" (for example) 52 * }</pre> 53 * In addition, the other parameters in the header will be captured, using 54 * the HTTP field names as JSON names, so that <pre> 55 * Date: Sun, 26 May 2002 18:06:04 GMT 56 * Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s 57 * Cache-Control: no-cache</pre> 58 * become 59 * <pre>{... 60 * Date: "Sun, 26 May 2002 18:06:04 GMT", 61 * Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s", 62 * "Cache-Control": "no-cache", 63 * ...}</pre> 64 * It does no further checking or conversion. It does not parse dates. 65 * It does not do '%' transforms on URLs. 66 * @param string An HTTP header string. 67 * @return A JSONObject containing the elements and attributes 68 * of the XML string. 69 * @throws JSONException 70 */ 71 public static JSONObject toJSONObject(String string) throws JSONException { 72 JSONObject o = new JSONObject(); 73 HTTPTokener x = new HTTPTokener(string); 74 String t; 75 76 t = x.nextToken(); 77 if (t.toUpperCase().startsWith("HTTP")) { 78 79 // Response 80 81 o.put("HTTP-Version", t); 82 o.put("Status-Code", x.nextToken()); 83 o.put("Reason-Phrase", x.nextTo('\0')); 84 x.next(); 85 86 } else { 87 88 // Request 89 90 o.put("Method", t); 91 o.put("Request-URI", x.nextToken()); 92 o.put("HTTP-Version", x.nextToken()); 93 } 94 95 // Fields 96 97 while (x.more()) { 98 String name = x.nextTo(':'); 99 x.next(':'); 100 o.put(name, x.nextTo('\0')); 101 x.next(); 102 } 103 return o; 104 } 105 106 107 /** 108 * Convert a JSONObject into an HTTP header. A request header must contain 109 * <pre>{ 110 * Method: "POST" (for example), 111 * "Request-URI": "/" (for example), 112 * "HTTP-Version": "HTTP/1.1" (for example) 113 * }</pre> 114 * A response header must contain 115 * <pre>{ 116 * "HTTP-Version": "HTTP/1.1" (for example), 117 * "Status-Code": "200" (for example), 118 * "Reason-Phrase": "OK" (for example) 119 * }</pre> 120 * Any other members of the JSONObject will be output as HTTP fields. 121 * The result will end with two CRLF pairs. 122 * @param o A JSONObject 123 * @return An HTTP header string. 124 * @throws JSONException if the object does not contain enough 125 * information. 126 */ 127 public static String toString(JSONObject o) throws JSONException { 128 Iterator keys = o.keys(); 129 String s; 130 StringBuffer sb = new StringBuffer(); 131 if (o.has("Status-Code") && o.has("Reason-Phrase")) { 132 sb.append(o.getString("HTTP-Version")); 133 sb.append(' '); 134 sb.append(o.getString("Status-Code")); 135 sb.append(' '); 136 sb.append(o.getString("Reason-Phrase")); 137 } else if (o.has("Method") && o.has("Request-URI")) { 138 sb.append(o.getString("Method")); 139 sb.append(' '); 140 sb.append('"'); 141 sb.append(o.getString("Request-URI")); 142 sb.append('"'); 143 sb.append(' '); 144 sb.append(o.getString("HTTP-Version")); 145 } else { 146 throw new JSONException("Not enough material for an HTTP header."); 147 } 148 sb.append(CRLF); 149 while (keys.hasNext()) { 150 s = keys.next().toString(); 151 if (!s.equals("HTTP-Version") && !s.equals("Status-Code") && 152 !s.equals("Reason-Phrase") && !s.equals("Method") && 153 !s.equals("Request-URI") && !o.isNull(s)) { 154 sb.append(s); 155 sb.append(": "); 156 sb.append(o.getString(s)); 157 sb.append(CRLF); 158 } 159 } 160 sb.append(CRLF); 161 return sb.toString(); 162 } 163 } 164
