Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
HTTP |
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1 | package org.apache.tapestry.json; |
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2 | ||
3 | /* |
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4 | Copyright (c) 2002 JSON.org |
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5 | ||
6 | Permission is hereby granted, free of charge, to any person obtaining a copy |
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7 | of this software and associated documentation files (the "Software"), to deal |
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8 | in the Software without restriction, including without limitation the rights |
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9 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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10 | copies of the Software, and to permit persons to whom the Software is |
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11 | furnished to do so, subject to the following conditions: |
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12 | ||
13 | The above copyright notice and this permission notice shall be included in all |
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14 | copies or substantial portions of the Software. |
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15 | ||
16 | The Software shall be used for Good, not Evil. |
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17 | ||
18 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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19 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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20 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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21 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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22 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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23 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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24 | SOFTWARE. |
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25 | */ |
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26 | ||
27 | import java.text.ParseException; |
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28 | import java.util.Iterator; |
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29 | import java.util.NoSuchElementException; |
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30 | ||
31 | /** |
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32 | * Convert an HTTP header to a JSONObject and back. |
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33 | * |
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34 | * @author JSON.org |
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35 | * @version 0.1 |
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36 | */ |
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37 | public final class HTTP |
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38 | { |
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39 | ||
40 | /** Carriage return/line feed. */ |
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41 | public static final String CRLF = "\r\n"; |
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42 | ||
43 | /* defeat instantiation */ |
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44 | private HTTP() |
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45 | 0 | { |
46 | 0 | } |
47 | ||
48 | /** |
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49 | * Convert an HTTP header string into a JSONObject. It can be a request |
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50 | * header or a response header. A request header will contain |
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51 | * |
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52 | * <pre> |
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53 | * { |
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54 | * Method: "POST" (for example), |
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55 | * "Request-URI": "/" (for example), |
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56 | * "HTTP-Version": "HTTP/1.1" (for example) |
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57 | * } |
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58 | * </pre> |
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59 | * |
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60 | * A response header will contain |
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61 | * |
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62 | * <pre> |
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63 | * { |
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64 | * "HTTP-Version": "HTTP/1.1" (for example), |
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65 | * "Status-Code": "200" (for example), |
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66 | * "Reason-Phrase": "OK" (for example) |
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67 | * } |
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68 | * </pre> |
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69 | * |
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70 | * In addition, the other parameters in the header will be captured, using |
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71 | * the HTTP field names as JSON names, so that |
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72 | * |
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73 | * <pre> |
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74 | * Date: Sun, 26 May 2002 18:06:04 GMT |
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75 | * Cookie: Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s |
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76 | * Cache-Control: no-cache |
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77 | * </pre> |
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78 | * |
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79 | * become |
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80 | * |
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81 | * <pre> |
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82 | * {... |
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83 | * Date: "Sun, 26 May 2002 18:06:04 GMT", |
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84 | * Cookie: "Q=q2=PPEAsg--; B=677gi6ouf29bn&b=2&f=s", |
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85 | * "Cache-Control": "no-cache", |
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86 | * ...} |
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87 | * </pre> |
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88 | * |
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89 | * It does no further checking or conversion. It does not parse dates. It |
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90 | * does not do '%' transforms on URLs. |
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91 | * |
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92 | * @param string |
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93 | * An HTTP header string. |
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94 | * @return A JSONObject containing the elements and attributes of the XML |
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95 | * string. |
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96 | * @throws ParseException |
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97 | */ |
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98 | public static JSONObject toJSONObject(String string) |
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99 | throws ParseException |
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100 | { |
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101 | 0 | JSONObject o = new JSONObject(); |
102 | 0 | HTTPTokener x = new HTTPTokener(string); |
103 | String t; |
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104 | ||
105 | 0 | t = x.nextToken(); |
106 | 0 | if (t.toUpperCase().startsWith("HTTP")) |
107 | { |
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108 | ||
109 | // Response |
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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 | } |
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117 | else |
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118 | { |
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119 | ||
120 | // Request |
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121 | ||
122 | 0 | o.put("Method", t); |
123 | 0 | o.put("Request-URI", x.nextToken()); |
124 | 0 | o.put("HTTP-Version", x.nextToken()); |
125 | } |
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126 | ||
127 | // Fields |
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128 | ||
129 | 0 | while(x.more()) |
130 | { |
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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 | } |
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138 | ||
139 | /** |
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140 | * Convert a JSONObject into an HTTP header. A request header must contain |
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141 | * |
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142 | * <pre> |
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143 | * { |
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144 | * Method: "POST" (for example), |
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145 | * "Request-URI": "/" (for example), |
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146 | * "HTTP-Version": "HTTP/1.1" (for example) |
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147 | * } |
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148 | * </pre> |
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149 | * |
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150 | * A response header must contain |
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151 | * |
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152 | * <pre> |
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153 | * { |
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154 | * "HTTP-Version": "HTTP/1.1" (for example), |
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155 | * "Status-Code": "200" (for example), |
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156 | * "Reason-Phrase": "OK" (for example) |
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157 | * } |
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158 | * </pre> |
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159 | * |
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160 | * Any other members of the JSONObject will be output as HTTP fields. The |
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161 | * result will end with two CRLF pairs. |
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162 | * |
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163 | * @param o |
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164 | * A JSONObject |
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165 | * @return An HTTP header string. |
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166 | * @throws NoSuchElementException |
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167 | * if the object does not contain enough information. |
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168 | */ |
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169 | public static String toString(JSONObject o) |
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170 | { |
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171 | 0 | Iterator keys = o.keys(); |
172 | String s; |
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173 | 0 | StringBuffer sb = new StringBuffer(); |
174 | 0 | if (o.has("Status-Code") && o.has("Reason-Phrase")) |
175 | { |
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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 | } |
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182 | 0 | else if (o.has("Method") && o.has("Request-URI")) |
183 | { |
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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 | } |
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192 | else |
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193 | { |
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194 | 0 | throw new NoSuchElementException( |
195 | "Not enough material for an HTTP header."); |
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196 | } |
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197 | 0 | sb.append(CRLF); |
198 | 0 | while(keys.hasNext()) |
199 | { |
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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") |
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203 | && !s.equals("Request-URI") && !o.isNull(s)) |
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204 | { |
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205 | 0 | sb.append(s); |
206 | 0 | sb.append(": "); |
207 | 0 | sb.append(o.getString(s)); |
208 | 0 | sb.append(CRLF); |
209 | } |
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210 | } |
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211 | 0 | sb.append(CRLF); |
212 | 0 | return sb.toString(); |
213 | } |
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214 | } |