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      1 /*
      2  * Copyright (C) 2006, 2007 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 #include "config.h"
     27 #include "ResourceResponse.h"
     28 
     29 #if USE(CFNETWORK)
     30 
     31 #include "HTTPParsers.h"
     32 #include "MIMETypeRegistry.h"
     33 #include <CFNetwork/CFURLResponsePriv.h>
     34 #include <wtf/RetainPtr.h>
     35 
     36 using namespace std;
     37 
     38 // We would like a better value for a maximum time_t,
     39 // but there is no way to do that in C with any certainty.
     40 // INT_MAX should work well enough for our purposes.
     41 #define MAX_TIME_T ((time_t)INT_MAX)
     42 
     43 namespace WebCore {
     44 
     45 static CFStringRef const commonHeaderFields[] = {
     46     CFSTR("Age"), CFSTR("Cache-Control"), CFSTR("Date"), CFSTR("Etag"), CFSTR("Expires"), CFSTR("Last-Modified"), CFSTR("Pragma")
     47 };
     48 static const int numCommonHeaderFields = sizeof(commonHeaderFields) / sizeof(CFStringRef);
     49 
     50 CFURLResponseRef ResourceResponse::cfURLResponse() const
     51 {
     52     if (!m_cfResponse && !m_isNull) {
     53         RetainPtr<CFURLRef> url(AdoptCF, m_url.createCFURL());
     54         RetainPtr<CFStringRef> mimeType(AdoptCF, m_mimeType.createCFString());
     55         RetainPtr<CFStringRef> textEncodingName(AdoptCF, m_textEncodingName.createCFString());
     56         m_cfResponse.adoptCF(CFURLResponseCreate(0, url.get(), mimeType.get(), m_expectedContentLength, textEncodingName.get(), kCFURLCacheStorageAllowed));
     57     }
     58 
     59     return m_cfResponse.get();
     60 }
     61 
     62 static inline bool filenameHasSaneExtension(const String& filename)
     63 {
     64     int dot = filename.find('.');
     65 
     66     // The dot can't be the first or last character in the filename.
     67     int length = filename.length();
     68     return dot > 0 && dot < length - 1;
     69 }
     70 
     71 static time_t toTimeT(CFAbsoluteTime time)
     72 {
     73     static const double maxTimeAsDouble = std::numeric_limits<time_t>::max();
     74     static const double minTimeAsDouble = std::numeric_limits<time_t>::min();
     75     return min(max(minTimeAsDouble, time + kCFAbsoluteTimeIntervalSince1970), maxTimeAsDouble);
     76 }
     77 
     78 void ResourceResponse::platformLazyInit(InitLevel initLevel)
     79 {
     80     if (m_initLevel > initLevel)
     81         return;
     82 
     83     if (m_isNull) {
     84         ASSERT(!m_cfResponse.get());
     85         return;
     86     }
     87 
     88     if (m_initLevel < CommonFieldsOnly && initLevel >= CommonFieldsOnly) {
     89         m_url = CFURLResponseGetURL(m_cfResponse.get());
     90         m_mimeType = CFURLResponseGetMIMEType(m_cfResponse.get());
     91         m_expectedContentLength = CFURLResponseGetExpectedContentLength(m_cfResponse.get());
     92         m_textEncodingName = CFURLResponseGetTextEncodingName(m_cfResponse.get());
     93 
     94         // Workaround for <rdar://problem/8757088>, can be removed once that is fixed.
     95         unsigned textEncodingNameLength = m_textEncodingName.length();
     96         if (textEncodingNameLength >= 2 && m_textEncodingName[0U] == '"' && m_textEncodingName[textEncodingNameLength - 1] == '"')
     97             m_textEncodingName = m_textEncodingName.substring(1, textEncodingNameLength - 2);
     98 
     99         m_lastModifiedDate = toTimeT(CFURLResponseGetLastModifiedDate(m_cfResponse.get()));
    100 
    101         RetainPtr<CFStringRef> suggestedFilename(AdoptCF, CFURLResponseCopySuggestedFilename(m_cfResponse.get()));
    102         m_suggestedFilename = suggestedFilename.get();
    103 
    104         CFHTTPMessageRef httpResponse = CFURLResponseGetHTTPResponse(m_cfResponse.get());
    105         if (httpResponse) {
    106             m_httpStatusCode = CFHTTPMessageGetResponseStatusCode(httpResponse);
    107 
    108             RetainPtr<CFDictionaryRef> headers(AdoptCF, CFHTTPMessageCopyAllHeaderFields(httpResponse));
    109 
    110             for (int i = 0; i < numCommonHeaderFields; i++) {
    111                 CFStringRef value;
    112                 if (CFDictionaryGetValueIfPresent(headers.get(), commonHeaderFields[i], (const void **)&value))
    113                     m_httpHeaderFields.set(commonHeaderFields[i], value);
    114             }
    115         } else
    116             m_httpStatusCode = 0;
    117     }
    118 
    119     if (m_initLevel < AllFields && initLevel >= AllFields) {
    120         CFHTTPMessageRef httpResponse = CFURLResponseGetHTTPResponse(m_cfResponse.get());
    121         if (httpResponse) {
    122             RetainPtr<CFStringRef> statusLine(AdoptCF, CFHTTPMessageCopyResponseStatusLine(httpResponse));
    123             m_httpStatusText = extractReasonPhraseFromHTTPStatusLine(statusLine.get());
    124 
    125             RetainPtr<CFDictionaryRef> headers(AdoptCF, CFHTTPMessageCopyAllHeaderFields(httpResponse));
    126             CFIndex headerCount = CFDictionaryGetCount(headers.get());
    127             Vector<const void*, 128> keys(headerCount);
    128             Vector<const void*, 128> values(headerCount);
    129             CFDictionaryGetKeysAndValues(headers.get(), keys.data(), values.data());
    130             for (int i = 0; i < headerCount; ++i)
    131                 m_httpHeaderFields.set((CFStringRef)keys[i], (CFStringRef)values[i]);
    132         }
    133     }
    134 
    135     m_initLevel = initLevel;
    136 }
    137 
    138 bool ResourceResponse::platformCompare(const ResourceResponse& a, const ResourceResponse& b)
    139 {
    140     return CFEqual(a.cfURLResponse(), b.cfURLResponse());
    141 }
    142 
    143 
    144 } // namespace WebCore
    145 
    146 #endif // USE(CFNETWORK)
    147