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1
18 package org.apache.batik.util;
19
20 import java.io.ByteArrayInputStream  ;
21 import java.io.IOException ;
22 import java.io.InputStream ;
23 import java.util.Iterator ;
24
25
33 public class ParsedURLDataProtocolHandler
34 extends AbstractParsedURLProtocolHandler {
35
36 static final String DATA_PROTOCOL = "data";
37 static final String BASE64 = "base64";
38 static final String CHARSET = "charset";
39
40 public ParsedURLDataProtocolHandler() {
41 super(DATA_PROTOCOL);
42 }
43
44 public ParsedURLData parseURL(ParsedURL baseURL, String urlStr) {
45 return parseURL(urlStr);
47 }
48
49 public ParsedURLData parseURL(String urlStr) {
50 DataParsedURLData ret = new DataParsedURLData();
51
52 int pidx=0, idx;
53 idx = urlStr.indexOf(':');
54 if (idx != -1) {
55 ret.protocol = urlStr.substring(pidx, idx);
57 if (ret.protocol.indexOf('/') == -1)
58 pidx = idx+1;
59 else {
60 ret.protocol = null;
63 pidx = 0;
64 }
65 }
66
67 idx = urlStr.indexOf(',',pidx);
68 if ((idx != -1) && (idx != pidx)) {
69 ret.host = urlStr.substring(pidx, idx);
70 pidx = idx+1;
71
72 int aidx = ret.host.lastIndexOf(';');
73 if ((aidx == -1) || (aidx==ret.host.length())) {
74 ret.contentType = ret.host;
75 } else {
76 String enc = ret.host.substring(aidx+1);
77 idx = enc.indexOf('=');
78 if (idx == -1) {
79 ret.contentEncoding = enc;
81 ret.contentType = ret.host.substring(0, aidx);
82 } else {
83 ret.contentType = ret.host;
84 }
85 aidx = 0;
87 idx = ret.contentType.indexOf(';', aidx);
88 if (idx != -1) {
89 aidx = idx+1;
90 while (aidx < ret.contentType.length()) {
91 idx = ret.contentType.indexOf(';', aidx);
92 if (idx == -1) idx = ret.contentType.length();
93 String param = ret.contentType.substring(aidx, idx);
94 int eqIdx = param.indexOf('=');
95 if ((eqIdx != -1) &&
96 (CHARSET.equals(param.substring(0,eqIdx))))
97 ret.charset = param.substring(eqIdx+1);
98 aidx = idx+1;
99 }
100 }
101 }
102 }
103
104 if (pidx != urlStr.length())
105 ret.path = urlStr.substring(pidx);
106
107 return ret;
108 }
109
110
113 static class DataParsedURLData extends ParsedURLData {
114 String charset= null;
115
116 public boolean complete() {
117 return (path != null);
118 }
119
120 public String getPortStr() {
121 String portStr ="data:";
122 if (host != null) portStr += host;
123 portStr += ",";
124 return portStr;
125 }
126
127 public String toString() {
128 String ret = getPortStr();
129 if (path != null) ret += path;
130 return ret;
131 }
132
133
137 public String getContentType(String userAgent) {
138 return contentType;
139 }
140
141
145 public String getContentEncoding(String userAgent) {
146 return contentEncoding;
147 }
148
149 protected InputStream openStreamInternal
150 (String userAgent, Iterator mimeTypes, Iterator encodingTypes)
151 throws IOException {
152 if (BASE64.equals(contentEncoding)) {
153 byte [] data = path.getBytes();
154 stream = new ByteArrayInputStream (data);
155 stream = new Base64DecodeStream(stream);
156 } else {
157 stream = decode(path);
158 }
159 return stream;
160 }
161
162 public static InputStream decode(String s) {
163 int len = s.length();
164 byte [] data = new byte[len];
165 int j=0;
166 for(int i=0; i<len; i++) {
167 char c = s.charAt(i);
168 switch (c) {
169 default : data[j++]= (byte)c; break;
170 case '%': {
171 if (i+2 < len) {
172 i += 2;
173 byte b;
174 char c1 = s.charAt(i-1);
175 if (c1 >= '0' && c1 <= '9') b=(byte)(c1-'0');
176 else if (c1 >= 'a' && c1 <= 'z') b=(byte)(c1-'a'+10);
177 else if (c1 >= 'A' && c1 <= 'Z') b=(byte)(c1-'A'+10);
178 else break;
179 b*=16;
180
181 char c2 = s.charAt(i);
182 if (c2 >= '0' && c2 <= '9') b+=(byte)(c2-'0');
183 else if (c2 >= 'a' && c2 <= 'z') b+=(byte)(c2-'a'+10);
184 else if (c2 >= 'A' && c2 <= 'Z') b+=(byte)(c2-'A'+10);
185 else break;
186 data[j++] = b;
187 }
188 }
189 break;
190 }
191 }
192 return new ByteArrayInputStream (data, 0, j);
193 }
194 }
195 }
196
197 |
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