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1
52
53 package com.go.teaservlet;
54
55 import java.util.*;
56 import javax.servlet.http.*;
57 import com.go.teaservlet.util.FilteredHttpServletRequest;
58
59
71 class SpiderableRequest extends FilteredHttpServletRequest {
72 private final String  mQuerySeparator;
73 private final String mParameterSeparator;
74 private final String mValueSeparator;
75
76 private final int mQuerySepLen;
77 private final int mParamSepLen;
78 private final int mValSepLen;
79
80 private String mPathInfo;
81 private Map mParameters;
82
83 public SpiderableRequest(HttpServletRequest request,
84 String querySeparator,
85 String parameterSeparator,
86 String valueSeparator) {
87 super(request);
88 mQuerySeparator = querySeparator;
89 mParameterSeparator = parameterSeparator;
90 mValueSeparator = valueSeparator;
91
92 mQuerySepLen = querySeparator.length();
93 mParamSepLen = parameterSeparator.length();
94 mValSepLen = valueSeparator.length();
95
96 mPathInfo = request.getPathInfo();
97 mParameters = new HashMap(37);
98
99 fillParameters();
100 fillDefaultParameters();
101 }
102
103 public String getPathInfo() {
104 return mPathInfo;
105 }
106
107 public String getParameter(String name) {
108 String [] values = getParameterValues(name);
109 if (values != null && values.length > 0) {
110 return values[0];
111 }
112 return null;
113 }
114
115 public String [] getParameterValues(String name) {
116 return (String [])mParameters.get(name);
117 }
118
119 public Enumeration getParameterNames() {
120 return Collections.enumeration(mParameters.keySet());
121 }
122
123 private void fillParameters() {
124 String str;
125 int startIndex, midIndex, endIndex;
126
127 if ("?".equals(mQuerySeparator)) {
128 if ((str = mRequest.getQueryString()) == null) {
129 return;
130 }
131 startIndex = 0;
132 }
133 else {
134 startIndex = mPathInfo.indexOf(mQuerySeparator);
135 if (startIndex >= 0) {
136 mPathInfo = mPathInfo.substring(0, startIndex);
137 }
138
139 str = mRequest.getRequestURI();
140 startIndex = str.indexOf(mQuerySeparator);
141 if (startIndex < 0) {
142 return;
143 }
144 startIndex += mQuerySepLen;
145 }
146
147 int length = str.length();
148
149 for (; startIndex < length; startIndex = endIndex + mParamSepLen) {
150 endIndex = str.indexOf(mParameterSeparator, startIndex);
151
152 if (endIndex < 0) {
153 endIndex = length;
154 }
155
156 midIndex = str.indexOf(mValueSeparator, startIndex);
157
158 String key;
159 String value;
160
161 if (midIndex < 0 || midIndex > endIndex) {
162 if (endIndex - startIndex > 1) {
163 key = str.substring(startIndex, endIndex);
164 value = "";
165 }
166 else {
167 continue;
168 }
169 }
170 else if (midIndex - startIndex > 1) {
171 key = str.substring(startIndex, midIndex);
172 value = str.substring(midIndex + mValSepLen, endIndex);
173 }
174 else {
175 continue;
176 }
177
178 putParameter(key, value);
179 }
180 }
181
182 private void fillDefaultParameters() {
183 Enumeration names = mRequest.getParameterNames();
184 while (names.hasMoreElements()) {
185 String name = (String )names.nextElement();
186 putParameters(name, mRequest.getParameterValues(name));
187 }
188 }
189
190 private void putParameter(String key, String value) {
191 String [] currentValues = (String [])mParameters.get(key);
192 if (currentValues == null) {
193 currentValues = new String [] {value};
194 }
195 else {
196 String [] newValues = new String [currentValues.length + 1];
197 int i;
198 for (i=0; i<currentValues.length; i++) {
199 newValues[i] = currentValues[i];
200 }
201 currentValues = newValues;
202 currentValues[i] = value;
203 }
204
205 mParameters.put(key, currentValues);
206 }
207
208
209 private void putParameters(String key, String [] values) {
210 if (values == null || values.length == 0) {
211 return;
212 }
213 else if (values.length == 1) {
214 putParameter(key, values[0]);
215 return;
216 }
217
218 String [] currentValues = (String [])mParameters.get(key);
219 if (currentValues == null) {
220 currentValues = values;
221 }
222 else {
223 String [] newValues =
224 new String [currentValues.length + values.length];
225 int i, j;
226 for (i=0; i<currentValues.length; i++) {
227 newValues[i] = currentValues[i];
228 }
229 for (j=0; j<values.length; j++) {
230 newValues[i + j] = values[j];
231 }
232 currentValues = newValues;
233 }
234
235 mParameters.put(key, currentValues);
236 }
237 }
238
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