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| 1 /* | |
| 2 * Copyright (C) 2008, 2009 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 COMPUTER, 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 COMPUTER, 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 | |
| 27 #include "core/loader/CrossOriginPreflightResultCache.h" | |
| 28 | |
| 29 #include "platform/HTTPNames.h" | |
| 30 #include "platform/loader/fetch/FetchUtils.h" | |
| 31 #include "platform/network/ResourceResponse.h" | |
| 32 #include "wtf/CurrentTime.h" | |
| 33 #include "wtf/StdLibExtras.h" | |
| 34 #include <memory> | |
| 35 | |
| 36 namespace blink { | |
| 37 | |
| 38 // These values are at the discretion of the user agent. | |
| 39 | |
| 40 static const unsigned defaultPreflightCacheTimeoutSeconds = 5; | |
| 41 | |
| 42 // Should be short enough to minimize the risk of using a poisoned cache after | |
| 43 // switching to a secure network. | |
| 44 static const unsigned maxPreflightCacheTimeoutSeconds = 600; | |
| 45 | |
| 46 static bool parseAccessControlMaxAge(const String& string, | |
| 47 unsigned& expiryDelta) { | |
| 48 // FIXME: this will not do the correct thing for a number starting with a '+' | |
| 49 bool ok = false; | |
| 50 expiryDelta = string.toUIntStrict(&ok); | |
| 51 return ok; | |
| 52 } | |
| 53 | |
| 54 template <class HashType> | |
| 55 static void addToAccessControlAllowList(const String& string, | |
| 56 unsigned start, | |
| 57 unsigned end, | |
| 58 HashSet<String, HashType>& set) { | |
| 59 StringImpl* stringImpl = string.impl(); | |
| 60 if (!stringImpl) | |
| 61 return; | |
| 62 | |
| 63 // Skip white space from start. | |
| 64 while (start <= end && isSpaceOrNewline((*stringImpl)[start])) | |
| 65 ++start; | |
| 66 | |
| 67 // only white space | |
| 68 if (start > end) | |
| 69 return; | |
| 70 | |
| 71 // Skip white space from end. | |
| 72 while (end && isSpaceOrNewline((*stringImpl)[end])) | |
| 73 --end; | |
| 74 | |
| 75 set.insert(string.substring(start, end - start + 1)); | |
| 76 } | |
| 77 | |
| 78 template <class HashType> | |
| 79 static bool parseAccessControlAllowList(const String& string, | |
| 80 HashSet<String, HashType>& set) { | |
| 81 unsigned start = 0; | |
| 82 size_t end; | |
| 83 while ((end = string.find(',', start)) != kNotFound) { | |
| 84 if (start != end) | |
| 85 addToAccessControlAllowList(string, start, end - 1, set); | |
| 86 start = end + 1; | |
| 87 } | |
| 88 if (start != string.length()) | |
| 89 addToAccessControlAllowList(string, start, string.length() - 1, set); | |
| 90 | |
| 91 return true; | |
| 92 } | |
| 93 | |
| 94 bool CrossOriginPreflightResultCacheItem::parse( | |
| 95 const ResourceResponse& response, | |
| 96 String& errorDescription) { | |
| 97 m_methods.clear(); | |
| 98 if (!parseAccessControlAllowList( | |
| 99 response.httpHeaderField(HTTPNames::Access_Control_Allow_Methods), | |
| 100 m_methods)) { | |
| 101 errorDescription = | |
| 102 "Cannot parse Access-Control-Allow-Methods response header field in " | |
| 103 "preflight response."; | |
| 104 return false; | |
| 105 } | |
| 106 | |
| 107 m_headers.clear(); | |
| 108 if (!parseAccessControlAllowList( | |
| 109 response.httpHeaderField(HTTPNames::Access_Control_Allow_Headers), | |
| 110 m_headers)) { | |
| 111 errorDescription = | |
| 112 "Cannot parse Access-Control-Allow-Headers response header field in " | |
| 113 "preflight response."; | |
| 114 return false; | |
| 115 } | |
| 116 | |
| 117 unsigned expiryDelta; | |
| 118 if (parseAccessControlMaxAge( | |
| 119 response.httpHeaderField(HTTPNames::Access_Control_Max_Age), | |
| 120 expiryDelta)) { | |
| 121 if (expiryDelta > maxPreflightCacheTimeoutSeconds) | |
| 122 expiryDelta = maxPreflightCacheTimeoutSeconds; | |
| 123 } else { | |
| 124 expiryDelta = defaultPreflightCacheTimeoutSeconds; | |
| 125 } | |
| 126 | |
| 127 m_absoluteExpiryTime = currentTime() + expiryDelta; | |
| 128 return true; | |
| 129 } | |
| 130 | |
| 131 bool CrossOriginPreflightResultCacheItem::allowsCrossOriginMethod( | |
| 132 const String& method, | |
| 133 String& errorDescription) const { | |
| 134 if (m_methods.contains(method) || FetchUtils::isSimpleMethod(method)) | |
| 135 return true; | |
| 136 | |
| 137 errorDescription = | |
| 138 "Method " + method + | |
| 139 " is not allowed by Access-Control-Allow-Methods in preflight response."; | |
| 140 return false; | |
| 141 } | |
| 142 | |
| 143 bool CrossOriginPreflightResultCacheItem::allowsCrossOriginHeaders( | |
| 144 const HTTPHeaderMap& requestHeaders, | |
| 145 String& errorDescription) const { | |
| 146 for (const auto& header : requestHeaders) { | |
| 147 if (!m_headers.contains(header.key) && | |
| 148 !FetchUtils::isSimpleHeader(header.key, header.value) && | |
| 149 !FetchUtils::isForbiddenHeaderName(header.key)) { | |
| 150 errorDescription = "Request header field " + header.key.getString() + | |
| 151 " is not allowed by Access-Control-Allow-Headers in " | |
| 152 "preflight response."; | |
| 153 return false; | |
| 154 } | |
| 155 } | |
| 156 return true; | |
| 157 } | |
| 158 | |
| 159 bool CrossOriginPreflightResultCacheItem::allowsRequest( | |
| 160 StoredCredentials includeCredentials, | |
| 161 const String& method, | |
| 162 const HTTPHeaderMap& requestHeaders) const { | |
| 163 String ignoredExplanation; | |
| 164 if (m_absoluteExpiryTime < currentTime()) | |
| 165 return false; | |
| 166 if (includeCredentials == AllowStoredCredentials && | |
| 167 m_credentials == DoNotAllowStoredCredentials) | |
| 168 return false; | |
| 169 if (!allowsCrossOriginMethod(method, ignoredExplanation)) | |
| 170 return false; | |
| 171 if (!allowsCrossOriginHeaders(requestHeaders, ignoredExplanation)) | |
| 172 return false; | |
| 173 return true; | |
| 174 } | |
| 175 | |
| 176 CrossOriginPreflightResultCache& CrossOriginPreflightResultCache::shared() { | |
| 177 DEFINE_STATIC_LOCAL(CrossOriginPreflightResultCache, cache, ()); | |
| 178 DCHECK(isMainThread()); | |
| 179 return cache; | |
| 180 } | |
| 181 | |
| 182 void CrossOriginPreflightResultCache::appendEntry( | |
| 183 const String& origin, | |
| 184 const KURL& url, | |
| 185 std::unique_ptr<CrossOriginPreflightResultCacheItem> preflightResult) { | |
| 186 DCHECK(isMainThread()); | |
| 187 m_preflightHashMap.set(std::make_pair(origin, url), | |
| 188 std::move(preflightResult)); | |
| 189 } | |
| 190 | |
| 191 bool CrossOriginPreflightResultCache::canSkipPreflight( | |
| 192 const String& origin, | |
| 193 const KURL& url, | |
| 194 StoredCredentials includeCredentials, | |
| 195 const String& method, | |
| 196 const HTTPHeaderMap& requestHeaders) { | |
| 197 DCHECK(isMainThread()); | |
| 198 CrossOriginPreflightResultHashMap::iterator cacheIt = | |
| 199 m_preflightHashMap.find(std::make_pair(origin, url)); | |
| 200 if (cacheIt == m_preflightHashMap.end()) | |
| 201 return false; | |
| 202 | |
| 203 if (cacheIt->value->allowsRequest(includeCredentials, method, requestHeaders)) | |
| 204 return true; | |
| 205 | |
| 206 m_preflightHashMap.remove(cacheIt); | |
| 207 return false; | |
| 208 } | |
| 209 | |
| 210 } // namespace blink | |
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Chromium Code Reviews
Issue 2700073002:
core/loader: create private directory to store private classes (Closed)
