1 /*

     2  * Copyright (C) 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 "WebKitDLL.h"

    28 #include "WebDownload.h"

    29 

    30 #include "DefaultDownloadDelegate.h"

    31 #include "MarshallingHelpers.h"

    32 #include "WebError.h"

    33 #include "WebKit.h"

    34 #include "WebKitLogging.h"

    35 #include "WebMutableURLRequest.h"

    36 #include "WebURLAuthenticationChallenge.h"

    37 #include "WebURLCredential.h"

    38 #include "WebURLResponse.h"

    39 

    40 #include <wtf/platform.h>

    41 #include <wtf/text/CString.h>

    42 

    43 #include <io.h>

    44 #include <sys/stat.h>

    45 #include <sys/types.h>

    46 

    47 #pragma warning(push, 0)

    48 #include <WebCore/AuthenticationCF.h>

    49 #include <WebCore/BString.h>

    50 #include <WebCore/CredentialStorage.h>

    51 #include <WebCore/LoaderRunLoopCF.h>

    52 #include <WebCore/ResourceError.h>

    53 #include <WebCore/ResourceHandle.h>

    54 #include <WebCore/ResourceRequest.h>

    55 #include <WebCore/ResourceResponse.h>

    56 #include <wtf/CurrentTime.h>

    57 #pragma warning(pop)

    58 

    59 using namespace WebCore;

    60 

    61 // CFURLDownload Callbacks ----------------------------------------------------------------

    62 static void didStartCallback(CFURLDownloadRef download, const void *clientInfo);

    63 static CFURLRequestRef willSendRequestCallback(CFURLDownloadRef download, CFURLRequestRef request, CFURLResponseRef redirectionResponse, const void *clientInfo);

    64 static void didReceiveAuthenticationChallengeCallback(CFURLDownloadRef download, CFURLAuthChallengeRef challenge, const void *clientInfo);

    65 static void didReceiveResponseCallback(CFURLDownloadRef download, CFURLResponseRef response, const void *clientInfo);

    66 static void willResumeWithResponseCallback(CFURLDownloadRef download, CFURLResponseRef response, UInt64 startingByte, const void *clientInfo);

    67 static void didReceiveDataCallback(CFURLDownloadRef download, CFIndex length, const void *clientInfo);

    68 static Boolean shouldDecodeDataOfMIMETypeCallback(CFURLDownloadRef download, CFStringRef encodingType, const void *clientInfo);

    69 static void decideDestinationWithSuggestedObjectNameCallback(CFURLDownloadRef download, CFStringRef objectName, const void *clientInfo);

    70 static void didCreateDestinationCallback(CFURLDownloadRef download, CFURLRef path, const void *clientInfo);

    71 static void didFinishCallback(CFURLDownloadRef download, const void *clientInfo);

    72 static void didFailCallback(CFURLDownloadRef download, CFErrorRef error, const void *clientInfo);

    73 

    74 void WebDownload::init(ResourceHandle* handle, const ResourceRequest& request, const ResourceResponse& response, IWebDownloadDelegate* delegate)

    75 {

    76     m_delegate = delegate ? delegate : DefaultDownloadDelegate::sharedInstance();

    77     CFURLConnectionRef connection = handle->connection();

    78     if (!connection) {

    79         LOG_ERROR("WebDownload::WebDownload(ResourceHandle*,...) called with an inactive ResourceHandle");    

    80         return;

    81     }

    82 

    83     CFURLDownloadClient client = {0, this, 0, 0, 0, didStartCallback, willSendRequestCallback, didReceiveAuthenticationChallengeCallback, 

    84         didReceiveResponseCallback, willResumeWithResponseCallback, didReceiveDataCallback, shouldDecodeDataOfMIMETypeCallback,

    85         decideDestinationWithSuggestedObjectNameCallback, didCreateDestinationCallback, didFinishCallback, didFailCallback};

    86 

    87     m_request.adoptRef(WebMutableURLRequest::createInstance(request));

    88     m_download.adoptCF(CFURLDownloadCreateAndStartWithLoadingConnection(0, connection, request.cfURLRequest(), response.cfURLResponse(), &client));

    89 

    90     // It is possible for CFURLDownloadCreateAndStartWithLoadingConnection() to fail if the passed in CFURLConnection is not in a "downloadable state"

    91     // However, we should never hit that case

    92     if (!m_download) {

    93         ASSERT_NOT_REACHED();

    94         LOG_ERROR("WebDownload - Failed to create WebDownload from existing connection (%s)", request.url().string().utf8().data());

    95     } else

    96         LOG(Download, "WebDownload - Created WebDownload %p from existing connection (%s)", this, request.url().string().utf8().data());

    97 

    98     // The CFURLDownload either starts successfully and retains the CFURLConnection, 

    99     // or it fails to creating and we have a now-useless connection with a dangling ref. 

   100     // Either way, we need to release the connection to balance out ref counts

   101     handle->releaseConnectionForDownload();

   102     CFRelease(connection);

   103 }

   104 

   105 void WebDownload::init(const KURL& url, IWebDownloadDelegate* delegate)

   106 {

   107     m_delegate = delegate ? delegate : DefaultDownloadDelegate::sharedInstance();

   108     LOG_ERROR("Delegate is %p", m_delegate.get());

   109 

   110     ResourceRequest request(url);

   111     CFURLRequestRef cfRequest = request.cfURLRequest();

   112 

   113     CFURLDownloadClient client = {0, this, 0, 0, 0, didStartCallback, willSendRequestCallback, didReceiveAuthenticationChallengeCallback, 

   114                                   didReceiveResponseCallback, willResumeWithResponseCallback, didReceiveDataCallback, shouldDecodeDataOfMIMETypeCallback, 

   115                                   decideDestinationWithSuggestedObjectNameCallback, didCreateDestinationCallback, didFinishCallback, didFailCallback};

   116     m_request.adoptRef(WebMutableURLRequest::createInstance(request));

   117     m_download.adoptCF(CFURLDownloadCreate(0, cfRequest, &client));

   118 

   119     CFURLDownloadScheduleWithCurrentMessageQueue(m_download.get());

   120     CFURLDownloadScheduleDownloadWithRunLoop(m_download.get(), loaderRunLoop(), kCFRunLoopDefaultMode);

   121 

   122     LOG(Download, "WebDownload - Initialized download of url %s in WebDownload %p", url.string().utf8().data(), this);

   123 }

   124 

   125 // IWebDownload -------------------------------------------------------------------

   126 

   127 HRESULT STDMETHODCALLTYPE WebDownload::initWithRequest(

   128         /* [in] */ IWebURLRequest* request, 

   129         /* [in] */ IWebDownloadDelegate* delegate)

   130 {

   131     COMPtr<WebMutableURLRequest> webRequest;

   132     if (!request || FAILED(request->QueryInterface(&webRequest))) {

   133         LOG(Download, "WebDownload - initWithRequest failed - not a WebMutableURLRequest");    

   134         return E_FAIL;

   135     }

   136 

   137     if (!delegate)

   138         return E_FAIL;

   139     m_delegate = delegate;

   140     LOG(Download, "Delegate is %p", m_delegate.get());

   141 

   142     RetainPtr<CFURLRequestRef> cfRequest = webRequest->resourceRequest().cfURLRequest();

   143 

   144     CFURLDownloadClient client = {0, this, 0, 0, 0, didStartCallback, willSendRequestCallback, didReceiveAuthenticationChallengeCallback, 

   145                                   didReceiveResponseCallback, willResumeWithResponseCallback, didReceiveDataCallback, shouldDecodeDataOfMIMETypeCallback, 

   146                                   decideDestinationWithSuggestedObjectNameCallback, didCreateDestinationCallback, didFinishCallback, didFailCallback};

   147     m_request.adoptRef(WebMutableURLRequest::createInstance(webRequest.get()));

   148     m_download.adoptCF(CFURLDownloadCreate(0, cfRequest.get(), &client));

   149 

   150     // If for some reason the download failed to create, 

   151     // we have particular cleanup to do

   152     if (!m_download) {

   153         m_request = 0;    

   154         return E_FAIL;

   155     }

   156 

   157     CFURLDownloadScheduleWithCurrentMessageQueue(m_download.get());

   158     CFURLDownloadScheduleDownloadWithRunLoop(m_download.get(), loaderRunLoop(), kCFRunLoopDefaultMode);

   159 

   160     LOG(Download, "WebDownload - initWithRequest complete, started download of url %s", webRequest->resourceRequest().url().string().utf8().data());

   161     return S_OK;

   162 }

   163 

   164 HRESULT STDMETHODCALLTYPE WebDownload::initToResumeWithBundle(

   165         /* [in] */ BSTR bundlePath, 

   166         /* [in] */ IWebDownloadDelegate* delegate)

   167 {

   168     LOG(Download, "Attempting resume of download bundle %s", String(bundlePath, SysStringLen(bundlePath)).ascii().data());

   169 

   170     RetainPtr<CFDataRef> resumeData(AdoptCF, extractResumeDataFromBundle(String(bundlePath, SysStringLen(bundlePath))));

   171     

   172     if (!resumeData)

   173         return E_FAIL;

   174 

   175     if (!delegate)

   176         return E_FAIL;

   177     m_delegate = delegate;

   178     LOG(Download, "Delegate is %p", m_delegate.get());

   179 

   180     CFURLDownloadClient client = {0, this, 0, 0, 0, didStartCallback, willSendRequestCallback, didReceiveAuthenticationChallengeCallback, 

   181                                   didReceiveResponseCallback, willResumeWithResponseCallback, didReceiveDataCallback, shouldDecodeDataOfMIMETypeCallback, 

   182                                   decideDestinationWithSuggestedObjectNameCallback, didCreateDestinationCallback, didFinishCallback, didFailCallback};

   183     

   184     RetainPtr<CFURLRef> pathURL(AdoptCF, MarshallingHelpers::PathStringToFileCFURLRef(String(bundlePath, SysStringLen(bundlePath))));

   185     ASSERT(pathURL);

   186 

   187     m_download.adoptCF(CFURLDownloadCreateWithResumeData(0, resumeData.get(), pathURL.get(), &client));

   188 

   189     if (!m_download) {

   190         LOG(Download, "Failed to create CFURLDownloadRef for resume");    

   191         return E_FAIL;

   192     }

   193     

   194     m_bundlePath = String(bundlePath, SysStringLen(bundlePath));

   195     // Attempt to remove the ".download" extension from the bundle for the final file destination

   196     // Failing that, we clear m_destination and will ask the delegate later once the download starts

   197     if (m_bundlePath.endsWith(bundleExtension(), false)) {

   198         m_destination = m_bundlePath.threadsafeCopy();

   199         m_destination.truncate(m_destination.length() - bundleExtension().length());

   200     } else

   201         m_destination = String();

   202     

   203     CFURLDownloadScheduleWithCurrentMessageQueue(m_download.get());

   204     CFURLDownloadScheduleDownloadWithRunLoop(m_download.get(), loaderRunLoop(), kCFRunLoopDefaultMode);

   205 

   206     LOG(Download, "WebDownload - initWithRequest complete, resumed download of bundle %s", String(bundlePath, SysStringLen(bundlePath)).ascii().data());

   207     return S_OK;

   208 }

   209 

   210 HRESULT STDMETHODCALLTYPE WebDownload::start()

   211 {

   212     LOG(Download, "WebDownload - Starting download (%p)", this);

   213     if (!m_download)

   214         return E_FAIL;

   215 

   216     CFURLDownloadStart(m_download.get());

   217     // FIXME: 4950477 - CFURLDownload neglects to make the didStart() client call upon starting the download.

   218     // This is a somewhat critical call, so we'll fake it for now!

   219     didStart();

   220 

   221     return S_OK;

   222 }

   223 

   224 HRESULT STDMETHODCALLTYPE WebDownload::cancel()

   225 {

   226     LOG(Download, "WebDownload - Cancelling download (%p)", this);

   227     if (!m_download)

   228         return E_FAIL;

   229 

   230     CFURLDownloadCancel(m_download.get());

   231     m_download = 0;

   232     return S_OK;

   233 }

   234 

   235 HRESULT STDMETHODCALLTYPE WebDownload::cancelForResume()

   236 {

   237     LOG(Download, "WebDownload - Cancelling download (%p), writing resume information to file if possible", this);

   238     ASSERT(m_download);

   239     if (!m_download)

   240         return E_FAIL;

   241 

   242     HRESULT hr = S_OK;

   243     RetainPtr<CFDataRef> resumeData;

   244     if (m_destination.isEmpty()) {

   245         CFURLDownloadCancel(m_download.get());

   246         goto exit;

   247     }

   248 

   249     CFURLDownloadSetDeletesUponFailure(m_download.get(), false);

   250     CFURLDownloadCancel(m_download.get());

   251 

   252     resumeData = CFURLDownloadCopyResumeData(m_download.get());

   253     if (!resumeData) {

   254         LOG(Download, "WebDownload - Unable to create resume data for download (%p)", this);

   255         goto exit;

   256     }

   257 

   258     appendResumeDataToBundle(resumeData.get(), m_bundlePath);

   259    

   260 exit:

   261     m_download = 0;

   262     return hr;

   263 }

   264 

   265 HRESULT STDMETHODCALLTYPE WebDownload::deletesFileUponFailure(

   266         /* [out, retval] */ BOOL* result)

   267 {

   268     if (!m_download)

   269         return E_FAIL;

   270     *result = CFURLDownloadDeletesUponFailure(m_download.get());

   271     return S_OK;

   272 }

   273 

   274 HRESULT STDMETHODCALLTYPE WebDownload::setDeletesFileUponFailure(

   275         /* [in] */ BOOL deletesFileUponFailure)

   276 {

   277     if (!m_download)

   278         return E_FAIL;

   279     CFURLDownloadSetDeletesUponFailure(m_download.get(), !!deletesFileUponFailure);

   280     return S_OK;

   281 }

   282 

   283 HRESULT STDMETHODCALLTYPE WebDownload::setDestination(

   284         /* [in] */ BSTR path, 

   285         /* [in] */ BOOL allowOverwrite)

   286 {

   287     if (!m_download)

   288         return E_FAIL;

   289 

   290     m_destination = String(path, SysStringLen(path));

   291     m_bundlePath = m_destination + bundleExtension();

   292 

   293     CFURLRef pathURL = MarshallingHelpers::PathStringToFileCFURLRef(m_bundlePath);

   294     CFURLDownloadSetDestination(m_download.get(), pathURL, !!allowOverwrite);

   295     CFRelease(pathURL);

   296 

   297     LOG(Download, "WebDownload - Set destination to %s", m_bundlePath.ascii().data());

   298 

   299     return S_OK;

   300 }

   301 

   302 // IWebURLAuthenticationChallengeSender -------------------------------------------------------------------

   303 

   304 HRESULT STDMETHODCALLTYPE WebDownload::cancelAuthenticationChallenge(

   305         /* [in] */ IWebURLAuthenticationChallenge*)

   306 {

   307     if (m_download) {

   308         CFURLDownloadCancel(m_download.get());

   309         m_download = 0;

   310     }

   311 

   312     // FIXME: Do we need a URL or description for this error code?

   313     ResourceError error(String(WebURLErrorDomain), WebURLErrorUserCancelledAuthentication, "", "");

   314     COMPtr<WebError> webError(AdoptCOM, WebError::createInstance(error));

   315     m_delegate->didFailWithError(this, webError.get());

   316 

   317     return S_OK;

   318 }

   319 

   320 HRESULT STDMETHODCALLTYPE WebDownload::continueWithoutCredentialForAuthenticationChallenge(

   321         /* [in] */ IWebURLAuthenticationChallenge* challenge)

   322 {

   323     COMPtr<WebURLAuthenticationChallenge> webChallenge(Query, challenge);

   324     if (!webChallenge)

   325         return E_NOINTERFACE;

   326 

   327     if (m_download)

   328         CFURLDownloadUseCredential(m_download.get(), 0, webChallenge->authenticationChallenge().cfURLAuthChallengeRef());

   329     return S_OK;

   330 }

   331 

   332 HRESULT STDMETHODCALLTYPE WebDownload::useCredential(

   333         /* [in] */ IWebURLCredential* credential, 

   334         /* [in] */ IWebURLAuthenticationChallenge* challenge)

   335 {

   336     COMPtr<WebURLAuthenticationChallenge> webChallenge(Query, challenge);

   337     if (!webChallenge)

   338         return E_NOINTERFACE;

   339 

   340     COMPtr<WebURLCredential> webCredential(Query, credential);

   341     if (!webCredential)

   342         return E_NOINTERFACE;

   343 

   344     RetainPtr<CFURLCredentialRef> cfCredential(AdoptCF, createCF(webCredential->credential()));

   345 

   346     if (m_download)

   347         CFURLDownloadUseCredential(m_download.get(), cfCredential.get(), webChallenge->authenticationChallenge().cfURLAuthChallengeRef());

   348     return S_OK;

   349 }

   350 

   351 // CFURLDownload Callbacks -------------------------------------------------------------------

   352 void WebDownload::didStart()

   353 {

   354 #ifndef NDEBUG

   355     m_startTime = m_dataTime = currentTime();

   356     m_received = 0;

   357     LOG(Download, "DOWNLOAD - Started %p at %.3f seconds", this, m_startTime);

   358 #endif

   359     if (FAILED(m_delegate->didBegin(this)))

   360         LOG_ERROR("DownloadDelegate->didBegin failed");

   361 }

   362 

   363 CFURLRequestRef WebDownload::willSendRequest(CFURLRequestRef request, CFURLResponseRef response)

   364 {

   365     COMPtr<WebMutableURLRequest> webRequest(AdoptCOM, WebMutableURLRequest::createInstance(ResourceRequest(request)));

   366     COMPtr<WebURLResponse> webResponse(AdoptCOM, WebURLResponse::createInstance(ResourceResponse(response)));

   367     COMPtr<IWebMutableURLRequest> finalRequest;

   368 

   369     if (FAILED(m_delegate->willSendRequest(this, webRequest.get(), webResponse.get(), &finalRequest)))

   370         LOG_ERROR("DownloadDelegate->willSendRequest failed");

   371     

   372     if (!finalRequest)

   373         return 0;

   374 

   375     COMPtr<WebMutableURLRequest> finalWebRequest(AdoptCOM, WebMutableURLRequest::createInstance(finalRequest.get()));

   376     m_request = finalWebRequest.get();

   377     CFURLRequestRef result = finalWebRequest->resourceRequest().cfURLRequest();

   378     CFRetain(result);

   379     return result;

   380 }

   381 

   382 void WebDownload::didReceiveAuthenticationChallenge(CFURLAuthChallengeRef challenge)

   383 {

   384     // Try previously stored credential first.

   385     if (!CFURLAuthChallengeGetPreviousFailureCount(challenge)) {

   386         Credential credential = CredentialStorage::get(core(CFURLAuthChallengeGetProtectionSpace(challenge)));

   387         if (!credential.isEmpty()) {

   388             RetainPtr<CFURLCredentialRef> cfCredential(AdoptCF, createCF(credential));

   389             CFURLDownloadUseCredential(m_download.get(), cfCredential.get(), challenge);

   390             return;

   391         }

   392     }

   393 

   394     COMPtr<IWebURLAuthenticationChallenge> webChallenge(AdoptCOM,

   395         WebURLAuthenticationChallenge::createInstance(AuthenticationChallenge(challenge, 0), this));

   396 

   397     if (SUCCEEDED(m_delegate->didReceiveAuthenticationChallenge(this, webChallenge.get())))

   398         return;

   399 

   400     cancelAuthenticationChallenge(webChallenge.get());

   401 }

   402 

   403 void WebDownload::didReceiveResponse(CFURLResponseRef response)

   404 {

   405     COMPtr<WebURLResponse> webResponse(AdoptCOM, WebURLResponse::createInstance(ResourceResponse(response)));

   406     if (FAILED(m_delegate->didReceiveResponse(this, webResponse.get())))

   407         LOG_ERROR("DownloadDelegate->didReceiveResponse failed");

   408 }

   409 

   410 void WebDownload::willResumeWithResponse(CFURLResponseRef response, UInt64 fromByte)

   411 {

   412     COMPtr<WebURLResponse> webResponse(AdoptCOM, WebURLResponse::createInstance(ResourceResponse(response)));

   413     if (FAILED(m_delegate->willResumeWithResponse(this, webResponse.get(), fromByte)))

   414         LOG_ERROR("DownloadDelegate->willResumeWithResponse failed");

   415 }

   416 

   417 void WebDownload::didReceiveData(CFIndex length)

   418 {

   419 #ifndef NDEBUG

   420     m_received += length;

   421     double current = currentTime();

   422     if (current - m_dataTime > 2.0)

   423         LOG(Download, "DOWNLOAD - %p hanged for %.3f seconds - Received %i bytes for a total of %i", this, current - m_dataTime, length, m_received);

   424     m_dataTime = current;

   425 #endif

   426     if (FAILED(m_delegate->didReceiveDataOfLength(this, length)))

   427         LOG_ERROR("DownloadDelegate->didReceiveData failed");

   428 }

   429 

   430 bool WebDownload::shouldDecodeDataOfMIMEType(CFStringRef mimeType)

   431 {

   432     BOOL result;

   433     if (FAILED(m_delegate->shouldDecodeSourceDataOfMIMEType(this, BString(mimeType), &result))) {

   434         LOG_ERROR("DownloadDelegate->shouldDecodeSourceDataOfMIMEType failed");

   435         return false;

   436     }

   437     return !!result;

   438 }

   439 

   440 void WebDownload::decideDestinationWithSuggestedObjectName(CFStringRef name)

   441 {    

   442     if (FAILED(m_delegate->decideDestinationWithSuggestedFilename(this, BString(name))))

   443         LOG_ERROR("DownloadDelegate->decideDestinationWithSuggestedObjectName failed");

   444 }

   445 

   446 void WebDownload::didCreateDestination(CFURLRef destination)

   447 {

   448     // The concept of the ".download bundle" is internal to the WebDownload, so therefore

   449     // we try to mask the delegate from its existence as much as possible by telling it the final

   450     // destination was created, when in reality the bundle was created

   451 

   452     String createdDestination = MarshallingHelpers::FileCFURLRefToPathString(destination);

   453 

   454     // At this point in receiving CFURLDownload callbacks, we should definitely have the bundle path stored locally

   455     // and it should match with the file that CFURLDownload created

   456     ASSERT(createdDestination == m_bundlePath);

   457     // And we should also always have the final-destination stored

   458     ASSERT(!m_destination.isEmpty());

   459 

   460     BString path(m_destination);

   461     if (FAILED(m_delegate->didCreateDestination(this, path)))

   462         LOG_ERROR("DownloadDelegate->didCreateDestination failed");

   463 }

   464 

   465 void WebDownload::didFinish()

   466 {

   467 #ifndef NDEBUG

   468     LOG(Download, "DOWNLOAD - Finished %p after %i bytes and %.3f seconds", this, m_received, currentTime() - m_startTime);

   469 #endif

   470 

   471     ASSERT(!m_bundlePath.isEmpty() && !m_destination.isEmpty());

   472     LOG(Download, "WebDownload - Moving file from bundle %s to destination %s", m_bundlePath.ascii().data(), m_destination.ascii().data());

   473 

   474     // We try to rename the bundle to the final file name.  If that fails, we give the delegate one more chance to chose

   475     // the final file name, then we just leave it

   476     if (!MoveFileEx(m_bundlePath.charactersWithNullTermination(), m_destination.charactersWithNullTermination(), 0)) {

   477         LOG_ERROR("Failed to move bundle %s to %s on completion\nError - %i", m_bundlePath.ascii().data(), m_destination.ascii().data(), GetLastError());

   478         

   479         bool reportBundlePathAsFinalPath = true;

   480 

   481         BString destinationBSTR(m_destination.characters(), m_destination.length());

   482         if (FAILED(m_delegate->decideDestinationWithSuggestedFilename(this, destinationBSTR)))

   483             LOG_ERROR("delegate->decideDestinationWithSuggestedFilename() failed");

   484 

   485         // The call to m_delegate->decideDestinationWithSuggestedFilename() should have changed our destination, so we'll try the move

   486         // one last time.

   487         if (!m_destination.isEmpty())

   488             if (MoveFileEx(m_bundlePath.charactersWithNullTermination(), m_destination.charactersWithNullTermination(), 0))

   489                 reportBundlePathAsFinalPath = false;

   490 

   491         // We either need to tell the delegate our final filename is the bundle filename, or is the file name they just told us to use

   492         if (reportBundlePathAsFinalPath) {

   493             BString bundleBSTR(m_bundlePath);

   494             m_delegate->didCreateDestination(this, bundleBSTR);

   495         } else {

   496             BString finalDestinationBSTR = BString(m_destination);

   497             m_delegate->didCreateDestination(this, finalDestinationBSTR);

   498         }

   499     }

   500 

   501     // It's extremely likely the call to delegate->didFinish() will deref this, so lets not let that cause our destruction just yet

   502     COMPtr<WebDownload> protect = this;

   503     if (FAILED(m_delegate->didFinish(this)))

   504         LOG_ERROR("DownloadDelegate->didFinish failed");

   505 

   506     m_download = 0;

   507 }

   508 

   509 void WebDownload::didFail(CFErrorRef error)

   510 {

   511     COMPtr<WebError> webError(AdoptCOM, WebError::createInstance(ResourceError(error)));

   512     if (FAILED(m_delegate->didFailWithError(this, webError.get())))

   513         LOG_ERROR("DownloadDelegate->didFailWithError failed");

   514 }

   515 

   516 // CFURLDownload Callbacks ----------------------------------------------------------------

   517 void didStartCallback(CFURLDownloadRef, const void *clientInfo)

   518 { ((WebDownload*)clientInfo)->didStart(); }

   519 

   520 CFURLRequestRef willSendRequestCallback(CFURLDownloadRef, CFURLRequestRef request, CFURLResponseRef redirectionResponse, const void *clientInfo)

   521 { return ((WebDownload*)clientInfo)->willSendRequest(request, redirectionResponse); }

   522 

   523 void didReceiveAuthenticationChallengeCallback(CFURLDownloadRef, CFURLAuthChallengeRef challenge, const void *clientInfo)

   524 { ((WebDownload*)clientInfo)->didReceiveAuthenticationChallenge(challenge); }

   525 

   526 void didReceiveResponseCallback(CFURLDownloadRef, CFURLResponseRef response, const void *clientInfo)

   527 { ((WebDownload*)clientInfo)->didReceiveResponse(response); }

   528 

   529 void willResumeWithResponseCallback(CFURLDownloadRef, CFURLResponseRef response, UInt64 startingByte, const void *clientInfo)

   530 { ((WebDownload*)clientInfo)->willResumeWithResponse(response, startingByte); }

   531 

   532 void didReceiveDataCallback(CFURLDownloadRef, CFIndex length, const void *clientInfo)

   533 { ((WebDownload*)clientInfo)->didReceiveData(length); }

   534 

   535 Boolean shouldDecodeDataOfMIMETypeCallback(CFURLDownloadRef, CFStringRef encodingType, const void *clientInfo)

   536 { return ((WebDownload*)clientInfo)->shouldDecodeDataOfMIMEType(encodingType); }

   537 

   538 void decideDestinationWithSuggestedObjectNameCallback(CFURLDownloadRef, CFStringRef objectName, const void *clientInfo)

   539 { ((WebDownload*)clientInfo)->decideDestinationWithSuggestedObjectName(objectName); }

   540 

   541 void didCreateDestinationCallback(CFURLDownloadRef, CFURLRef path, const void *clientInfo)

   542 { ((WebDownload*)clientInfo)->didCreateDestination(path); }

   543 

   544 void didFinishCallback(CFURLDownloadRef, const void *clientInfo)

   545 { ((WebDownload*)clientInfo)->didFinish(); }

   546 

   547 void didFailCallback(CFURLDownloadRef, CFErrorRef error, const void *clientInfo)

   548 { ((WebDownload*)clientInfo)->didFail(error); }