Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
HTTP |
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1 | package org.apache.tapestry.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.text.ParseException; | |
28 | import java.util.Iterator; | |
29 | import java.util.NoSuchElementException; | |
30 | ||
31 | /** | |
32 | * Convert an HTTP header to a JSONObject and back. | |
33 | * | |
34 | * @author JSON.org | |
35 | * @version 0.1 | |
36 | */ | |
37 | public final class HTTP | |
38 | { | |
39 | ||
40 | /** Carriage return/line feed. */ | |
41 | public static final String CRLF = "\r\n"; | |
42 | ||
43 | /* defeat instantiation */ | |
44 | private HTTP() | |
45 | 0 | { |
46 | 0 | } |
47 | ||
48 | /** | |
49 | * Convert an HTTP header string into a JSONObject. It can be a request | |
50 | * header or a response header. A request header will contain | |
51 | * | |
52 | * <pre> | |
53 | * { | |
54 | * Method: "POST" (for example), | |
55 | * "Request-URI": "/" (for example), | |
56 | * "HTTP-Version": "HTTP/1.1" (for example) | |
57 | * } | |
58 | * </pre> | |
59 | * | |
60 | * A response header will contain | |
61 | * | |
62 | * <pre> | |
63 | * { | |
64 | * "HTTP-Version": "HTTP/1.1" (for example), | |
65 | * "Status-Code": "200" (for example), | |
66 | * "Reason-Phrase": "OK" (for example) | |
67 | * } | |
68 | * </pre> | |
69 | * | |
70 | * In addition, the other parameters in the header will be captured, using | |
71 | * the HTTP field names as JSON names, so that | |
72 | * | |
73 | * <pre> | |
74 | * Date: Sun, 26 May 2002 18:06:04 GMT | |
75 | * Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s | |
76 | * Cache-Control: no-cache | |
77 | * </pre> | |
78 | * | |
79 | * become | |
80 | * | |
81 | * <pre> | |
82 | * {... | |
83 | * Date: "Sun, 26 May 2002 18:06:04 GMT", | |
84 | * Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s", | |
85 | * "Cache-Control": "no-cache", | |
86 | * ...} | |
87 | * </pre> | |
88 | * | |
89 | * It does no further checking or conversion. It does not parse dates. It | |
90 | * does not do '%' transforms on URLs. | |
91 | * | |
92 | * @param string | |
93 | * An HTTP header string. | |
94 | * @return A JSONObject containing the elements and attributes of the XML | |
95 | * string. | |
96 | * @throws ParseException | |
97 | */ | |
98 | public static JSONObject toJSONObject(String string) | |
99 | throws ParseException | |
100 | { | |
101 | 0 | JSONObject o = new JSONObject(); |
102 | 0 | HTTPTokener x = new HTTPTokener(string); |
103 | String t; | |
104 | ||
105 | 0 | t = x.nextToken(); |
106 | 0 | if (t.toUpperCase().startsWith("HTTP")) |
107 | { | |
108 | ||
109 | // Response | |
110 | ||
111 | 0 | o.put("HTTP-Version", t); |
112 | 0 | o.put("Status-Code", x.nextToken()); |
113 | 0 | o.put("Reason-Phrase", x.nextTo('\0')); |
114 | 0 | x.next(); |
115 | ||
116 | } | |
117 | else | |
118 | { | |
119 | ||
120 | // Request | |
121 | ||
122 | 0 | o.put("Method", t); |
123 | 0 | o.put("Request-URI", x.nextToken()); |
124 | 0 | o.put("HTTP-Version", x.nextToken()); |
125 | } | |
126 | ||
127 | // Fields | |
128 | ||
129 | 0 | while(x.more()) |
130 | { | |
131 | 0 | String name = x.nextTo(':'); |
132 | 0 | x.next(':'); |
133 | 0 | o.put(name, x.nextTo('\0')); |
134 | 0 | x.next(); |
135 | 0 | } |
136 | 0 | return o; |
137 | } | |
138 | ||
139 | /** | |
140 | * Convert a JSONObject into an HTTP header. A request header must contain | |
141 | * | |
142 | * <pre> | |
143 | * { | |
144 | * Method: "POST" (for example), | |
145 | * "Request-URI": "/" (for example), | |
146 | * "HTTP-Version": "HTTP/1.1" (for example) | |
147 | * } | |
148 | * </pre> | |
149 | * | |
150 | * A response header must contain | |
151 | * | |
152 | * <pre> | |
153 | * { | |
154 | * "HTTP-Version": "HTTP/1.1" (for example), | |
155 | * "Status-Code": "200" (for example), | |
156 | * "Reason-Phrase": "OK" (for example) | |
157 | * } | |
158 | * </pre> | |
159 | * | |
160 | * Any other members of the JSONObject will be output as HTTP fields. The | |
161 | * result will end with two CRLF pairs. | |
162 | * | |
163 | * @param o | |
164 | * A JSONObject | |
165 | * @return An HTTP header string. | |
166 | * @throws NoSuchElementException | |
167 | * if the object does not contain enough information. | |
168 | */ | |
169 | public static String toString(JSONObject o) | |
170 | { | |
171 | 0 | Iterator keys = o.keys(); |
172 | String s; | |
173 | 0 | StringBuffer sb = new StringBuffer(); |
174 | 0 | if (o.has("Status-Code") && o.has("Reason-Phrase")) |
175 | { | |
176 | 0 | sb.append(o.getString("HTTP-Version")); |
177 | 0 | sb.append(' '); |
178 | 0 | sb.append(o.getString("Status-Code")); |
179 | 0 | sb.append(' '); |
180 | 0 | sb.append(o.getString("Reason-Phrase")); |
181 | } | |
182 | 0 | else if (o.has("Method") && o.has("Request-URI")) |
183 | { | |
184 | 0 | sb.append(o.getString("Method")); |
185 | 0 | sb.append(' '); |
186 | 0 | sb.append('"'); |
187 | 0 | sb.append(o.getString("Request-URI")); |
188 | 0 | sb.append('"'); |
189 | 0 | sb.append(' '); |
190 | 0 | sb.append(o.getString("HTTP-Version")); |
191 | } | |
192 | else | |
193 | { | |
194 | 0 | throw new NoSuchElementException( |
195 | "Not enough material for an HTTP header."); | |
196 | } | |
197 | 0 | sb.append(CRLF); |
198 | 0 | while(keys.hasNext()) |
199 | { | |
200 | 0 | s = keys.next().toString(); |
201 | 0 | if (!s.equals("HTTP-Version") && !s.equals("Status-Code") |
202 | && !s.equals("Reason-Phrase") && !s.equals("Method") | |
203 | && !s.equals("Request-URI") && !o.isNull(s)) | |
204 | { | |
205 | 0 | sb.append(s); |
206 | 0 | sb.append(": "); |
207 | 0 | sb.append(o.getString(s)); |
208 | 0 | sb.append(CRLF); |
209 | } | |
210 | } | |
211 | 0 | sb.append(CRLF); |
212 | 0 | return sb.toString(); |
213 | } | |
214 | } |