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1   package atg.taglib.json.util;
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  /**
28   * The HTTPTokener extends the JSONTokener to provide additional methods
29   * for the parsing of HTTP headers.
30   * @author JSON.org
31   * @version 2
32   */
33  public class HTTPTokener extends JSONTokener {
34  
35      /**
36       * Construct an XMLTokener from a string.
37       * @param s A source string.
38       */
39      public HTTPTokener(String s) {
40          super(s);
41      }
42  
43  
44      /**
45       * Get the next token or string. This is used in parsing HTTP headers.
46       * @throws JSONException
47       * @return A String.
48       */
49      public String nextToken() throws JSONException {
50          char c;
51          char q;
52          StringBuffer sb = new StringBuffer();
53          do {
54              c = next();
55          } while (Character.isWhitespace(c));
56          if (c == '"' || c == '\'') {
57              q = c;
58              for (;;) {
59                  c = next();
60                  if (c < ' ') {
61                      throw syntaxError("Unterminated string.");
62                  }
63                  if (c == q) {
64                      return sb.toString();
65                  }
66                  sb.append(c);
67              }
68          } 
69          for (;;) {
70              if (c == 0 || Character.isWhitespace(c)) {
71                  return sb.toString();
72              }
73              sb.append(c);
74              c = next();
75          }
76      }
77  }