1 /* 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "config.h" 27 #include "ManifestParser.h" 28 29 #if ENABLE(OFFLINE_WEB_APPLICATIONS) 30 31 #include "KURL.h" 32 #include "TextResourceDecoder.h" 33 #include <wtf/unicode/CharacterNames.h> 34 35 using namespace std; 36 37 namespace WebCore { 38 39 enum Mode { Explicit, Fallback, OnlineWhitelist, Unknown }; 40 41 bool parseManifest(const KURL& manifestURL, const char* data, int length, Manifest& manifest) 42 { 43 ASSERT(manifest.explicitURLs.isEmpty()); 44 ASSERT(manifest.onlineWhitelistedURLs.isEmpty()); 45 ASSERT(manifest.fallbackURLs.isEmpty()); 46 manifest.allowAllNetworkRequests = false; 47 48 Mode mode = Explicit; 49 50 RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("text/cache-manifest", "UTF-8"); 51 String s = decoder->decode(data, length); 52 s += decoder->flush(); 53 54 // Look for the magic signature: "^\xFEFF?CACHE MANIFEST[ \t]?" (the BOM is removed by TextResourceDecoder). 55 // Example: "CACHE MANIFEST #comment" is a valid signature. 56 // Example: "CACHE MANIFEST;V2" is not. 57 if (!s.startsWith("CACHE MANIFEST")) 58 return false; 59 60 const UChar* end = s.characters() + s.length(); 61 const UChar* p = s.characters() + 14; // "CACHE MANIFEST" is 14 characters. 62 63 if (p < end && *p != ' ' && *p != '\t' && *p != '\n' && *p != '\r') 64 return false; 65 66 // Skip to the end of the line. 67 while (p < end && *p != '\r' && *p != '\n') 68 p++; 69 70 while (1) { 71 // Skip whitespace 72 while (p < end && (*p == '\n' || *p == '\r' || *p == ' ' || *p == '\t')) 73 p++; 74 75 if (p == end) 76 break; 77 78 const UChar* lineStart = p; 79 80 // Find the end of the line 81 while (p < end && *p != '\r' && *p != '\n') 82 p++; 83 84 // Check if we have a comment 85 if (*lineStart == '#') 86 continue; 87 88 // Get rid of trailing whitespace 89 const UChar* tmp = p - 1; 90 while (tmp > lineStart && (*tmp == ' ' || *tmp == '\t')) 91 tmp--; 92 93 String line(lineStart, tmp - lineStart + 1); 94 95 if (line == "CACHE:") 96 mode = Explicit; 97 else if (line == "FALLBACK:") 98 mode = Fallback; 99 else if (line == "NETWORK:") 100 mode = OnlineWhitelist; 101 else if (line.endsWith(":")) 102 mode = Unknown; 103 else if (mode == Unknown) 104 continue; 105 else if (mode == Explicit || mode == OnlineWhitelist) { 106 const UChar* p = line.characters(); 107 const UChar* lineEnd = p + line.length(); 108 109 // Look for whitespace separating the URL from subsequent ignored tokens. 110 while (p < lineEnd && *p != '\t' && *p != ' ') 111 p++; 112 113 if (mode == OnlineWhitelist && p - line.characters() == 1 && *line.characters() == '*') { 114 // Wildcard was found. 115 manifest.allowAllNetworkRequests = true; 116 continue; 117 } 118 119 KURL url(manifestURL, String(line.characters(), p - line.characters())); 120 121 if (!url.isValid()) 122 continue; 123 124 if (url.hasFragmentIdentifier()) 125 url.removeFragmentIdentifier(); 126 127 if (!equalIgnoringCase(url.protocol(), manifestURL.protocol())) 128 continue; 129 130 if (mode == Explicit && manifestURL.protocolIs("https") && !protocolHostAndPortAreEqual(manifestURL, url)) 131 continue; 132 133 if (mode == Explicit) 134 manifest.explicitURLs.add(url.string()); 135 else 136 manifest.onlineWhitelistedURLs.append(url); 137 138 } else if (mode == Fallback) { 139 const UChar* p = line.characters(); 140 const UChar* lineEnd = p + line.length(); 141 142 // Look for whitespace separating the two URLs 143 while (p < lineEnd && *p != '\t' && *p != ' ') 144 p++; 145 146 if (p == lineEnd) { 147 // There was no whitespace separating the URLs. 148 continue; 149 } 150 151 KURL namespaceURL(manifestURL, String(line.characters(), p - line.characters())); 152 if (!namespaceURL.isValid()) 153 continue; 154 if (namespaceURL.hasFragmentIdentifier()) 155 namespaceURL.removeFragmentIdentifier(); 156 157 if (!protocolHostAndPortAreEqual(manifestURL, namespaceURL)) 158 continue; 159 160 // Skip whitespace separating fallback namespace from URL. 161 while (p < lineEnd && (*p == '\t' || *p == ' ')) 162 p++; 163 164 // Look for whitespace separating the URL from subsequent ignored tokens. 165 const UChar* fallbackStart = p; 166 while (p < lineEnd && *p != '\t' && *p != ' ') 167 p++; 168 169 KURL fallbackURL(manifestURL, String(fallbackStart, p - fallbackStart)); 170 if (!fallbackURL.isValid()) 171 continue; 172 if (fallbackURL.hasFragmentIdentifier()) 173 fallbackURL.removeFragmentIdentifier(); 174 175 if (!protocolHostAndPortAreEqual(manifestURL, fallbackURL)) 176 continue; 177 178 manifest.fallbackURLs.append(make_pair(namespaceURL, fallbackURL)); 179 } else 180 ASSERT_NOT_REACHED(); 181 } 182 183 return true; 184 } 185 186 } 187 188 #endif // ENABLE(OFFLINE_WEB_APPLICATIONS) 189
