Merge pull request #4256 from classdojo/cd-master

Fix crashes and memory leaks

AFNetworking/AFURLSessionManager.h

@@ -196,7 +196,15 @@ NS_ASSUME_NONNULL_BEGIN
 
  @param cancelPendingTasks Whether or not to cancel pending tasks.
  */
-- (void)invalidateSessionCancelingTasks:(BOOL)cancelPendingTasks;
+- (void)invalidateSessionCancelingTasks:(BOOL)cancelPendingTasks DEPRECATED_ATTRIBUTE;
+
+/**
+ Invalidates the managed session, optionally canceling pending tasks and optionally resets given session.
+ 
+ @param cancelPendingTasks  Whether or not to cancel pending tasks.
+ @param resetSession        Whether or not to reset the session of the manager.
+ */
+- (void)invalidateSessionCancelingTasks:(BOOL)cancelPendingTasks resetSession:(BOOL)resetSession;
 
 ///-------------------------
 /// @name Running Data Tasks

AFNetworking/AFURLSessionManager.m

@@ -405,7 +405,7 @@ + (void)load {
             8) Set the current class to the super class, and repeat steps 3-8
          */
         NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration ephemeralSessionConfiguration];
-        NSURLSession * session = [NSURLSession sessionWithConfiguration:configuration];
+        NSURLSession *session = [NSURLSession sessionWithConfiguration:configuration];
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wnonnull"
         NSURLSessionDataTask *localDataTask = [session dataTaskWithURL:nil];
@@ -518,8 +518,6 @@ - (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)config
     self.operationQueue = [[NSOperationQueue alloc] init];
     self.operationQueue.maxConcurrentOperationCount = 1;
 
-    self.session = [NSURLSession sessionWithConfiguration:self.sessionConfiguration delegate:self delegateQueue:self.operationQueue];
-
     self.responseSerializer = [AFJSONResponseSerializer serializer];
 
     self.securityPolicy = [AFSecurityPolicy defaultPolicy];
@@ -533,17 +531,20 @@ - (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)config
     self.lock = [[NSLock alloc] init];
     self.lock.name = AFURLSessionManagerLockName;
 
+    __weak typeof(self) weakSelf = self;
     [self.session getTasksWithCompletionHandler:^(NSArray *dataTasks, NSArray *uploadTasks, NSArray *downloadTasks) {
+
+        __strong typeof(weakSelf) strongSelf = weakSelf;
         for (NSURLSessionDataTask *task in dataTasks) {
-            [self addDelegateForDataTask:task uploadProgress:nil downloadProgress:nil completionHandler:nil];
+            [strongSelf addDelegateForDataTask:task uploadProgress:nil downloadProgress:nil completionHandler:nil];
         }
 
         for (NSURLSessionUploadTask *uploadTask in uploadTasks) {
-            [self addDelegateForUploadTask:uploadTask progress:nil completionHandler:nil];
+            [strongSelf addDelegateForUploadTask:uploadTask progress:nil completionHandler:nil];
         }
 
         for (NSURLSessionDownloadTask *downloadTask in downloadTasks) {
-            [self addDelegateForDownloadTask:downloadTask progress:nil destination:nil completionHandler:nil];
+            [strongSelf addDelegateForDownloadTask:downloadTask progress:nil destination:nil completionHandler:nil];
         }
     }];
 
@@ -556,6 +557,19 @@ - (void)dealloc {
 
 #pragma mark -
 
+- (NSURLSession *)session {
+
+    @synchronized (self) {
+        if (!_session) {
+            _session = [NSURLSession sessionWithConfiguration:self.sessionConfiguration delegate:self delegateQueue:self.operationQueue];
+        }
+    }
+    return _session;
+}
+
+#pragma mark -
+
+
 - (NSString *)taskDescriptionForSessionTasks {
     return [NSString stringWithFormat:@"%p", self];
 }
@@ -712,11 +726,18 @@ - (NSArray *)downloadTasks {
 #pragma mark -
 
 - (void)invalidateSessionCancelingTasks:(BOOL)cancelPendingTasks {
+    [self invalidateSessionCancelingTasks:cancelPendingTasks resetSession:NO];
+}
+
+- (void)invalidateSessionCancelingTasks:(BOOL)cancelPendingTasks resetSession:(BOOL)resetSession {
     if (cancelPendingTasks) {
         [self.session invalidateAndCancel];
     } else {
         [self.session finishTasksAndInvalidate];
     }
+    if (resetSession) {
+        self.session = nil;
+    }
 }
 
 #pragma mark -