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Diffstat (limited to 'Firebase/Core/FIRNetworkURLSession.m')
| -rw-r--r-- | Firebase/Core/FIRNetworkURLSession.m | 669 |
1 files changed, 0 insertions, 669 deletions
diff --git a/Firebase/Core/FIRNetworkURLSession.m b/Firebase/Core/FIRNetworkURLSession.m deleted file mode 100644 index 470d3e9..0000000 --- a/Firebase/Core/FIRNetworkURLSession.m +++ /dev/null @@ -1,669 +0,0 @@ -// Copyright 2017 Google -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -#import <Foundation/Foundation.h> - -#import "Private/FIRNetworkURLSession.h" - -#import "Private/FIRLogger.h" -#import "Private/FIRMutableDictionary.h" -#import "Private/FIRNetworkConstants.h" -#import "Private/FIRNetworkMessageCode.h" - -@implementation FIRNetworkURLSession { - /// The handler to be called when the request completes or error has occurs. - FIRNetworkURLSessionCompletionHandler _completionHandler; - - /// Session ID generated randomly with a fixed prefix. - NSString *_sessionID; - - /// The session configuration. - NSURLSessionConfiguration *_sessionConfig; - - /// The path to the directory where all temporary files are stored before uploading. - NSURL *_networkDirectoryURL; - - /// The downloaded data from fetching. - NSData *_downloadedData; - - /// The path to the temporary file which stores the uploading data. - NSURL *_uploadingFileURL; - - /// The current request. - NSURLRequest *_request; -} - -#pragma mark - Init - -- (instancetype)initWithNetworkLoggerDelegate:(id<FIRNetworkLoggerDelegate>)networkLoggerDelegate { - self = [super init]; - if (self) { - // Create URL to the directory where all temporary files to upload have to be stored. - NSArray *paths = - NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES); - NSString *applicationSupportDirectory = paths.firstObject; - NSArray *tempPathComponents = @[ - applicationSupportDirectory, kFIRNetworkApplicationSupportSubdirectory, - kFIRNetworkTempDirectoryName - ]; - _networkDirectoryURL = [NSURL fileURLWithPathComponents:tempPathComponents]; - _sessionID = [NSString stringWithFormat:@"%@-%@", kFIRNetworkBackgroundSessionConfigIDPrefix, - [[NSUUID UUID] UUIDString]]; - _loggerDelegate = networkLoggerDelegate; - } - return self; -} - -#pragma mark - External Methods - -#pragma mark - To be called from AppDelegate - -+ (void)handleEventsForBackgroundURLSessionID:(NSString *)sessionID - completionHandler: - (FIRNetworkSystemCompletionHandler)systemCompletionHandler { - // The session may not be FIRAnalytics background. Ignore those that do not have the prefix. - if (![sessionID hasPrefix:kFIRNetworkBackgroundSessionConfigIDPrefix]) { - return; - } - FIRNetworkURLSession *fetcher = [self fetcherWithSessionIdentifier:sessionID]; - if (fetcher != nil) { - [fetcher addSystemCompletionHandler:systemCompletionHandler forSession:sessionID]; - } else { - FIRLogError(kFIRLoggerCore, - [NSString stringWithFormat:@"I-NET%06ld", (long)kFIRNetworkMessageCodeNetwork003], - @"Failed to retrieve background session with ID %@ after app is relaunched.", - sessionID); - } -} - -#pragma mark - External Methods - -/// Sends an async POST request using NSURLSession for iOS >= 7.0, and returns an ID of the -/// connection. -- (NSString *)sessionIDFromAsyncPOSTRequest:(NSURLRequest *)request - completionHandler:(FIRNetworkURLSessionCompletionHandler)handler { - // NSURLSessionUploadTask does not work with NSData in the background. - // To avoid this issue, write the data to a temporary file to upload it. - // Make a temporary file with the data subset. - _uploadingFileURL = [self temporaryFilePathWithSessionID:_sessionID]; - NSError *writeError; - NSURLSessionUploadTask *postRequestTask; - NSURLSession *session; - BOOL didWriteFile = NO; - - // Clean up the entire temp folder to avoid temp files that remain in case the previous session - // crashed and did not clean up. - [self maybeRemoveTempFilesAtURL:_networkDirectoryURL - expiringTime:kFIRNetworkTempFolderExpireTime]; - - // If there is no background network enabled, no need to write to file. This will allow default - // network session which runs on the foreground. - if (_backgroundNetworkEnabled && [self ensureTemporaryDirectoryExists]) { - didWriteFile = [request.HTTPBody writeToFile:_uploadingFileURL.path - options:NSDataWritingAtomic - error:&writeError]; - - if (writeError) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession000 - message:@"Failed to write request data to file" - context:writeError]; - } - } - - if (didWriteFile) { - // Exclude this file from backing up to iTunes. There are conflicting reports that excluding - // directory from backing up does not excluding files of that directory from backing up. - [self excludeFromBackupForURL:_uploadingFileURL]; - - _sessionConfig = [self backgroundSessionConfigWithSessionID:_sessionID]; - [self populateSessionConfig:_sessionConfig withRequest:request]; - session = [NSURLSession sessionWithConfiguration:_sessionConfig - delegate:self - delegateQueue:[NSOperationQueue mainQueue]]; - postRequestTask = [session uploadTaskWithRequest:request fromFile:_uploadingFileURL]; - } else { - // If we cannot write to file, just send it in the foreground. - _sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration]; - [self populateSessionConfig:_sessionConfig withRequest:request]; - _sessionConfig.URLCache = nil; - session = [NSURLSession sessionWithConfiguration:_sessionConfig - delegate:self - delegateQueue:[NSOperationQueue mainQueue]]; - postRequestTask = [session uploadTaskWithRequest:request fromData:request.HTTPBody]; - } - - if (!session || !postRequestTask) { - NSError *error = [[NSError alloc] - initWithDomain:kFIRNetworkErrorDomain - code:FIRErrorCodeNetworkRequestCreation - userInfo:@{kFIRNetworkErrorContext : @"Cannot create network session"}]; - [self callCompletionHandler:handler withResponse:nil data:nil error:error]; - return nil; - } - - // Save the session into memory. - NSMapTable *sessionIdentifierToFetcherMap = [[self class] sessionIDToFetcherMap]; - [sessionIdentifierToFetcherMap setObject:self forKey:_sessionID]; - - _request = [request copy]; - - // Store completion handler because background session does not accept handler block but custom - // delegate. - _completionHandler = [handler copy]; - [postRequestTask resume]; - - return _sessionID; -} - -/// Sends an async GET request using NSURLSession for iOS >= 7.0, and returns an ID of the session. -- (NSString *)sessionIDFromAsyncGETRequest:(NSURLRequest *)request - completionHandler:(FIRNetworkURLSessionCompletionHandler)handler { - if (_backgroundNetworkEnabled) { - _sessionConfig = [self backgroundSessionConfigWithSessionID:_sessionID]; - } else { - _sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration]; - } - - [self populateSessionConfig:_sessionConfig withRequest:request]; - - // Do not cache the GET request. - _sessionConfig.URLCache = nil; - - NSURLSession *session = [NSURLSession sessionWithConfiguration:_sessionConfig - delegate:self - delegateQueue:[NSOperationQueue mainQueue]]; - NSURLSessionDownloadTask *downloadTask = [session downloadTaskWithRequest:request]; - - if (!session || !downloadTask) { - NSError *error = [[NSError alloc] - initWithDomain:kFIRNetworkErrorDomain - code:FIRErrorCodeNetworkRequestCreation - userInfo:@{kFIRNetworkErrorContext : @"Cannot create network session"}]; - [self callCompletionHandler:handler withResponse:nil data:nil error:error]; - return nil; - } - - // Save the session into memory. - NSMapTable *sessionIdentifierToFetcherMap = [[self class] sessionIDToFetcherMap]; - [sessionIdentifierToFetcherMap setObject:self forKey:_sessionID]; - - _request = [request copy]; - - _completionHandler = [handler copy]; - [downloadTask resume]; - - return _sessionID; -} - -#pragma mark - NSURLSessionTaskDelegate - -/// Called by the NSURLSession once the download task is completed. The file is saved in the -/// provided URL so we need to read the data and store into _downloadedData. Once the session is -/// completed, URLSession:task:didCompleteWithError will be called and the completion handler will -/// be called with the downloaded data. -- (void)URLSession:(NSURLSession *)session - downloadTask:(NSURLSessionDownloadTask *)task - didFinishDownloadingToURL:(NSURL *)url { - if (!url.path) { - [_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession001 - message:@"Unable to read downloaded data from empty temp path"]; - _downloadedData = nil; - return; - } - - NSError *error; - _downloadedData = [NSData dataWithContentsOfFile:url.path options:0 error:&error]; - - if (error) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession002 - message:@"Cannot read the content of downloaded data" - context:error]; - _downloadedData = nil; - } -} - -#if TARGET_OS_IOS || TARGET_OS_TV -- (void)URLSessionDidFinishEventsForBackgroundURLSession:(NSURLSession *)session { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelDebug - messageCode:kFIRNetworkMessageCodeURLSession003 - message:@"Background session finished" - context:session.configuration.identifier]; - [self callSystemCompletionHandler:session.configuration.identifier]; -} -#endif - -- (void)URLSession:(NSURLSession *)session - task:(NSURLSessionTask *)task - didCompleteWithError:(NSError *)error { - // Avoid any chance of recursive behavior leading to it being used repeatedly. - FIRNetworkURLSessionCompletionHandler handler = _completionHandler; - _completionHandler = nil; - - if (task.response) { - // The following assertion should always be true for HTTP requests, see https://goo.gl/gVLxT7. - NSAssert([task.response isKindOfClass:[NSHTTPURLResponse class]], @"URL response must be HTTP"); - - // The server responded so ignore the error created by the system. - error = nil; - } else if (!error) { - error = [[NSError alloc] - initWithDomain:kFIRNetworkErrorDomain - code:FIRErrorCodeNetworkInvalidResponse - userInfo:@{kFIRNetworkErrorContext : @"Network Error: Empty network response"}]; - } - - [self callCompletionHandler:handler - withResponse:(NSHTTPURLResponse *)task.response - data:_downloadedData - error:error]; - - // Remove the temp file to avoid trashing devices with lots of temp files. - [self removeTempItemAtURL:_uploadingFileURL]; - - // Try to clean up stale files again. - [self maybeRemoveTempFilesAtURL:_networkDirectoryURL - expiringTime:kFIRNetworkTempFolderExpireTime]; -} - -- (void)URLSession:(NSURLSession *)session - task:(NSURLSessionTask *)task - didReceiveChallenge:(NSURLAuthenticationChallenge *)challenge - completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, - NSURLCredential *credential))completionHandler { - // The handling is modeled after GTMSessionFetcher. - if ([challenge.protectionSpace.authenticationMethod - isEqualToString:NSURLAuthenticationMethodServerTrust]) { - SecTrustRef serverTrust = challenge.protectionSpace.serverTrust; - if (serverTrust == NULL) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelDebug - messageCode:kFIRNetworkMessageCodeURLSession004 - message:@"Received empty server trust for host. Host" - context:_request.URL]; - completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil); - return; - } - NSURLCredential *credential = [NSURLCredential credentialForTrust:serverTrust]; - if (!credential) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelWarning - messageCode:kFIRNetworkMessageCodeURLSession005 - message:@"Unable to verify server identity. Host" - context:_request.URL]; - completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil); - return; - } - - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelDebug - messageCode:kFIRNetworkMessageCodeURLSession006 - message:@"Received SSL challenge for host. Host" - context:_request.URL]; - - void (^callback)(BOOL) = ^(BOOL allow) { - if (allow) { - completionHandler(NSURLSessionAuthChallengeUseCredential, credential); - } else { - [self->_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelDebug - messageCode:kFIRNetworkMessageCodeURLSession007 - message:@"Cancelling authentication challenge for host. Host" - context:self->_request.URL]; - completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil); - } - }; - - // Retain the trust object to avoid a SecTrustEvaluate() crash on iOS 7. - CFRetain(serverTrust); - - // Evaluate the certificate chain. - // - // The delegate queue may be the main thread. Trust evaluation could cause some - // blocking network activity, so we must evaluate async, as documented at - // https://developer.apple.com/library/ios/technotes/tn2232/ - dispatch_queue_t evaluateBackgroundQueue = - dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); - - dispatch_async(evaluateBackgroundQueue, ^{ - SecTrustResultType trustEval = kSecTrustResultInvalid; - BOOL shouldAllow; - OSStatus trustError; - - @synchronized([FIRNetworkURLSession class]) { - trustError = SecTrustEvaluate(serverTrust, &trustEval); - } - - if (trustError != errSecSuccess) { - [self->_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession008 - message:@"Cannot evaluate server trust. Error, host" - contexts:@[ @(trustError), self->_request.URL ]]; - shouldAllow = NO; - } else { - // Having a trust level "unspecified" by the user is the usual result, described at - // https://developer.apple.com/library/mac/qa/qa1360 - shouldAllow = - (trustEval == kSecTrustResultUnspecified || trustEval == kSecTrustResultProceed); - } - - // Call the call back with the permission. - callback(shouldAllow); - - CFRelease(serverTrust); - }); - return; - } - - // Default handling for other Auth Challenges. - completionHandler(NSURLSessionAuthChallengePerformDefaultHandling, nil); -} - -#pragma mark - Internal Methods - -/// Stores system completion handler with session ID as key. -- (void)addSystemCompletionHandler:(FIRNetworkSystemCompletionHandler)handler - forSession:(NSString *)identifier { - if (!handler) { - [_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession009 - message:@"Cannot store nil system completion handler in network"]; - return; - } - - if (!identifier.length) { - [_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession010 - message: - @"Cannot store system completion handler with empty network " - "session identifier"]; - return; - } - - FIRMutableDictionary *systemCompletionHandlers = - [[self class] sessionIDToSystemCompletionHandlerDictionary]; - if (systemCompletionHandlers[identifier]) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelWarning - messageCode:kFIRNetworkMessageCodeURLSession011 - message:@"Got multiple system handlers for a single session ID" - context:identifier]; - } - - systemCompletionHandlers[identifier] = handler; -} - -/// Calls the system provided completion handler with the session ID stored in the dictionary. -/// The handler will be removed from the dictionary after being called. -- (void)callSystemCompletionHandler:(NSString *)identifier { - FIRMutableDictionary *systemCompletionHandlers = - [[self class] sessionIDToSystemCompletionHandlerDictionary]; - FIRNetworkSystemCompletionHandler handler = [systemCompletionHandlers objectForKey:identifier]; - - if (handler) { - [systemCompletionHandlers removeObjectForKey:identifier]; - - dispatch_async(dispatch_get_main_queue(), ^{ - handler(); - }); - } -} - -/// Sets or updates the session ID of this session. -- (void)setSessionID:(NSString *)sessionID { - _sessionID = [sessionID copy]; -} - -/// Creates a background session configuration with the session ID using the supported method. -- (NSURLSessionConfiguration *)backgroundSessionConfigWithSessionID:(NSString *)sessionID { -#if (TARGET_OS_OSX && defined(MAC_OS_X_VERSION_10_10) && \ - MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_10) || \ - TARGET_OS_TV || \ - (TARGET_OS_IOS && defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MIN_REQUIRED >= __IPHONE_8_0) - - // iOS 8/10.10 builds require the new backgroundSessionConfiguration method name. - return [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:sessionID]; - -#elif (TARGET_OS_OSX && defined(MAC_OS_X_VERSION_10_10) && \ - MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_10) || \ - (TARGET_OS_IOS && defined(__IPHONE_8_0) && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_8_0) - - // Do a runtime check to avoid a deprecation warning about using - // +backgroundSessionConfiguration: on iOS 8. - if ([NSURLSessionConfiguration - respondsToSelector:@selector(backgroundSessionConfigurationWithIdentifier:)]) { - // Running on iOS 8+/OS X 10.10+. - return [NSURLSessionConfiguration backgroundSessionConfigurationWithIdentifier:sessionID]; - } else { - // Running on iOS 7/OS X 10.9. - return [NSURLSessionConfiguration backgroundSessionConfiguration:sessionID]; - } - -#else - // Building with an SDK earlier than iOS 8/OS X 10.10. - return [NSURLSessionConfiguration backgroundSessionConfiguration:sessionID]; -#endif -} - -- (void)maybeRemoveTempFilesAtURL:(NSURL *)folderURL expiringTime:(NSTimeInterval)staleTime { - if (!folderURL.absoluteString.length) { - return; - } - - NSFileManager *fileManager = [NSFileManager defaultManager]; - NSError *error = nil; - - NSArray *properties = @[ NSURLCreationDateKey ]; - NSArray *directoryContent = - [fileManager contentsOfDirectoryAtURL:folderURL - includingPropertiesForKeys:properties - options:NSDirectoryEnumerationSkipsSubdirectoryDescendants - error:&error]; - if (error && error.code != NSFileReadNoSuchFileError) { - [_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelDebug - messageCode:kFIRNetworkMessageCodeURLSession012 - message:@"Cannot get files from the temporary network folder. Error" - context:error]; - return; - } - - if (!directoryContent.count) { - return; - } - - NSTimeInterval now = [NSDate date].timeIntervalSince1970; - for (NSURL *tempFile in directoryContent) { - NSDate *creationDate; - BOOL getCreationDate = - [tempFile getResourceValue:&creationDate forKey:NSURLCreationDateKey error:NULL]; - if (!getCreationDate) { - continue; - } - NSTimeInterval creationTimeInterval = creationDate.timeIntervalSince1970; - if (fabs(now - creationTimeInterval) > staleTime) { - [self removeTempItemAtURL:tempFile]; - } - } -} - -/// Removes the temporary file written to disk for sending the request. It has to be cleaned up -/// after the session is done. -- (void)removeTempItemAtURL:(NSURL *)fileURL { - if (!fileURL.absoluteString.length) { - return; - } - - NSFileManager *fileManager = [NSFileManager defaultManager]; - NSError *error = nil; - - if (![fileManager removeItemAtURL:fileURL error:&error] && error.code != NSFileNoSuchFileError) { - [_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession013 - message:@"Failed to remove temporary uploading data file. Error" - context:error.localizedDescription]; - } -} - -/// Gets the fetcher with the session ID. -+ (instancetype)fetcherWithSessionIdentifier:(NSString *)sessionIdentifier { - NSMapTable *sessionIdentifierToFetcherMap = [self sessionIDToFetcherMap]; - FIRNetworkURLSession *session = [sessionIdentifierToFetcherMap objectForKey:sessionIdentifier]; - if (!session && [sessionIdentifier hasPrefix:kFIRNetworkBackgroundSessionConfigIDPrefix]) { - session = [[FIRNetworkURLSession alloc] initWithNetworkLoggerDelegate:nil]; - [session setSessionID:sessionIdentifier]; - [sessionIdentifierToFetcherMap setObject:session forKey:sessionIdentifier]; - } - return session; -} - -/// Returns a map of the fetcher by session ID. Creates a map if it is not created. -+ (NSMapTable *)sessionIDToFetcherMap { - static NSMapTable *sessionIDToFetcherMap; - - static dispatch_once_t sessionMapOnceToken; - dispatch_once(&sessionMapOnceToken, ^{ - sessionIDToFetcherMap = [NSMapTable strongToWeakObjectsMapTable]; - }); - return sessionIDToFetcherMap; -} - -/// Returns a map of system provided completion handler by session ID. Creates a map if it is not -/// created. -+ (FIRMutableDictionary *)sessionIDToSystemCompletionHandlerDictionary { - static FIRMutableDictionary *systemCompletionHandlers; - - static dispatch_once_t systemCompletionHandlerOnceToken; - dispatch_once(&systemCompletionHandlerOnceToken, ^{ - systemCompletionHandlers = [[FIRMutableDictionary alloc] init]; - }); - return systemCompletionHandlers; -} - -- (NSURL *)temporaryFilePathWithSessionID:(NSString *)sessionID { - NSString *tempName = [NSString stringWithFormat:@"FIRUpload_temp_%@", sessionID]; - return [_networkDirectoryURL URLByAppendingPathComponent:tempName]; -} - -/// Makes sure that the directory to store temp files exists. If not, tries to create it and returns -/// YES. If there is anything wrong, returns NO. -- (BOOL)ensureTemporaryDirectoryExists { - NSFileManager *fileManager = [NSFileManager defaultManager]; - NSError *error = nil; - - // Create a temporary directory if it does not exist or was deleted. - if ([_networkDirectoryURL checkResourceIsReachableAndReturnError:&error]) { - return YES; - } - - if (error && error.code != NSFileReadNoSuchFileError) { - [_loggerDelegate - firNetwork_logWithLevel:kFIRNetworkLogLevelWarning - messageCode:kFIRNetworkMessageCodeURLSession014 - message:@"Error while trying to access Network temp folder. Error" - context:error]; - } - - NSError *writeError = nil; - - [fileManager createDirectoryAtURL:_networkDirectoryURL - withIntermediateDirectories:YES - attributes:nil - error:&writeError]; - if (writeError) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession015 - message:@"Cannot create temporary directory. Error" - context:writeError]; - return NO; - } - - // Set the iCloud exclusion attribute on the Documents URL. - [self excludeFromBackupForURL:_networkDirectoryURL]; - - return YES; -} - -- (void)excludeFromBackupForURL:(NSURL *)url { - if (!url.path) { - return; - } - - // Set the iCloud exclusion attribute on the Documents URL. - NSError *preventBackupError = nil; - [url setResourceValue:@YES forKey:NSURLIsExcludedFromBackupKey error:&preventBackupError]; - if (preventBackupError) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession016 - message:@"Cannot exclude temporary folder from iTunes backup"]; - } -} - -- (void)URLSession:(NSURLSession *)session - task:(NSURLSessionTask *)task - willPerformHTTPRedirection:(NSHTTPURLResponse *)response - newRequest:(NSURLRequest *)request - completionHandler:(void (^)(NSURLRequest *))completionHandler { - NSArray *nonAllowedRedirectionCodes = @[ - @(kFIRNetworkHTTPStatusCodeFound), @(kFIRNetworkHTTPStatusCodeMovedPermanently), - @(kFIRNetworkHTTPStatusCodeMovedTemporarily), @(kFIRNetworkHTTPStatusCodeMultipleChoices) - ]; - - // Allow those not in the non allowed list to be followed. - if (![nonAllowedRedirectionCodes containsObject:@(response.statusCode)]) { - completionHandler(request); - return; - } - - // Do not allow redirection if the response code is in the non-allowed list. - NSURLRequest *newRequest = request; - - if (response) { - newRequest = nil; - } - - completionHandler(newRequest); -} - -#pragma mark - Helper Methods - -- (void)callCompletionHandler:(FIRNetworkURLSessionCompletionHandler)handler - withResponse:(NSHTTPURLResponse *)response - data:(NSData *)data - error:(NSError *)error { - if (error) { - [_loggerDelegate firNetwork_logWithLevel:kFIRNetworkLogLevelError - messageCode:kFIRNetworkMessageCodeURLSession017 - message:@"Encounter network error. Code, error" - contexts:@[ @(error.code), error ]]; - } - - if (handler) { - dispatch_async(dispatch_get_main_queue(), ^{ - handler(response, data, self->_sessionID, error); - }); - } -} - -- (void)populateSessionConfig:(NSURLSessionConfiguration *)sessionConfig - withRequest:(NSURLRequest *)request { - sessionConfig.HTTPAdditionalHeaders = request.allHTTPHeaderFields; - sessionConfig.timeoutIntervalForRequest = request.timeoutInterval; - sessionConfig.timeoutIntervalForResource = request.timeoutInterval; - sessionConfig.requestCachePolicy = request.cachePolicy; -} - -@end |