AFNetworking框架分析(二)——AFURLSessionManager(上)

    NSURL *securl                   = [NSURL URLWithString:authenticate_appAuthenticate];
    NSMutableURLRequest *secrequest = [[NSMutableURLRequest alloc]initWithURL:securl
                                                                  cachePolicy:NSURLRequestReloadIgnoringCacheData
                                                              timeoutInterval:1000];
    
    [secrequest setValue:[MHXIMPAFOper hashRule:[MHXIMPAFOper getTimeStamp]
                                           uuid:[MHUniqueID uniqueCFUUID]]
      forHTTPHeaderField:@"X-IMPF"];
    
    [secrequest setHTTPMethod:@"POST"];
    SendObject *secsend  = [[SendObject alloc]init];
    NSString *secbodyStr = [[secsend getSend] yy_modelToJSONString];
    NSData *secbody      = [secbodyStr dataUsingEncoding:NSUTF8StringEncoding];
    [secrequest setHTTPBody:secbody];
    NSURLSession *requestSessions = [NSURLSession sharedSession];
    NSURLSessionDataTask *requestTasks = [requestSessions dataTaskWithRequest:secrequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        NSLog(@"data ======= %@, response ======= %@, error ======= %@",data ,response, error);

    }];
    [requestTasks resume];

+(AFHTTPSessionManager *)httpManager{
    // 获取请求对象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    // 设置请求格式
    manager.requestSerializer = [AFJSONRequestSerializer serializer];
    // 设置返回格式
    manager.responseSerializer = [AFJSONResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/plain", @"multipart/form-data", @"application/json", @"text/html", @"image/jpeg", @"image/png", @"application/octet-stream", @"text/json", nil];
    [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Accept"];
    [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    manager.requestSerializer.timeoutInterval = kRequestTimeOut;
    return manager;
}

+(__kindof NSURLSessionTask *)Post:(NSString *)URLString parameters:(id)parameters success:(void(^)(id responseObject))success failure:(void(^)(NSError *))failure{
    AFHTTPSessionManager *manager = [self httpManager];
    return [manager POST:URLString parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {
        
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        if (success) {
            success(responseObject);
        }
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        if (failure) {
            failure(error);
        }
    }];
}

- (instancetype)initWithBaseURL:(NSURL *)url
           sessionConfiguration:(NSURLSessionConfiguration *)configuration
{
    self = [super initWithSessionConfiguration:configuration];
    if (!self) {
        return nil;
    }

    // Ensure terminal slash for baseURL path, so that NSURL +URLWithString:relativeToURL: works as expected
    if ([[url path] length] > 0 && ![[url absoluteString] hasSuffix:@"/"]) {
        url = [url URLByAppendingPathComponent:@""];
    }

    self.baseURL = url;

    self.requestSerializer = [AFHTTPRequestSerializer serializer];
    self.responseSerializer = [AFJSONResponseSerializer serializer];

    return self;
}

- (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)configuration {
    self = [super init];
    if (!self) {
        return nil;
    }
    //设置默认的configuration，配置session
    if (!configuration) {
        configuration = [NSURLSessionConfiguration defaultSessionConfiguration];
    }
    //当前实例变量持有configuration
    self.sessionConfiguration = configuration;

    //设置delegate的操作队列并发线程数量为1，即串行队列
    self.operationQueue = [[NSOperationQueue alloc] init];
    self.operationQueue.maxConcurrentOperationCount = 1;

    /*
     
     */
    self.session = [NSURLSession sessionWithConfiguration:self.sessionConfiguration delegate:self delegateQueue:self.operationQueue];
    
    //默认为JSON解析
    self.responseSerializer = [AFJSONResponseSerializer serializer];
    
    //设置默认证书，无条件信任HTTPS认证
    self.securityPolicy = [AFSecurityPolicy defaultPolicy];

#if !TARGET_OS_WATCH
    //网络状态监听
    self.reachabilityManager = [AFNetworkReachabilityManager sharedManager];
#endif

    //存放一个 delegate = value，taskId = key 的字典
    self.mutableTaskDelegatesKeyedByTaskIdentifier = [[NSMutableDictionary alloc] init];

    //使用NSLock确保线程安全
    self.lock = [[NSLock alloc] init];
    self.lock.name = AFURLSessionManagerLockName;

    //异步获取当前session所有未完成的task。会让后台任务重新回来初始化session，之前可能存在的任务进行置空处理
    //参考AFN问题汇总https://github.com/AFNetworking/AFNetworking/issues/3499
    [self.session getTasksWithCompletionHandler:^(NSArray *dataTasks, NSArray *uploadTasks, NSArray *downloadTasks) {
        for (NSURLSessionDataTask *task in dataTasks) {
            [self addDelegateForDataTask:task uploadProgress:nil downloadProgress:nil completionHandler:nil];
        }

        for (NSURLSessionUploadTask *uploadTask in uploadTasks) {
            [self addDelegateForUploadTask:uploadTask progress:nil completionHandler:nil];
        }

        for (NSURLSessionDownloadTask *downloadTask in downloadTasks) {
            [self addDelegateForDownloadTask:downloadTask progress:nil destination:nil completionHandler:nil];
        }
    }];

    return self;
}