iOS - 增加AFHTTPRequestOperationManager的超时

Question

我正在从一个非常慢的服务器上下载JSON数据.从服务器获得一个resoonse大约需要一分钟.我使用AFNetworking库,我的代码抛出"请求超时"错误:

NSString *urlString = [NSString stringWithFormat:@"%@/account.do?JSON&sysparm_action=getRecords",baseUrlString];

    NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"login"];
    NSString *password = [[NSUserDefaults standardUserDefaults] objectForKey:@"password"];

    [manager setRequestSerializer:[AFHTTPRequestSerializer serializer]];
    [manager.requestSerializer setAuthorizationHeaderFieldWithUsername:login password:password];


    [manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"JSON: %@", responseObject);
        [self parseJsonWithAccountsData:responseObject];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", operation.responseString);
        [self performSelectorOnMainThread:@selector(failedWithContactsDownload) withObject:nil waitUntilDone:YES];
    }];

没有找到设置超时的方法AFHTTPRequestOperationManager.我该怎么做？

Answer 1

在AFNetworking 2库中有AFHTTPRequestSerializer直接设置请求超时间隔的方法.

NSString *urlString = [NSString stringWithFormat:@"%@/account.do?JSON&sysparm_action=getRecords",baseUrlString];

    NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"login"];
    NSString *password = [[NSUserDefaults standardUserDefaults] objectForKey:@"password"];

    [manager setRequestSerializer:[AFHTTPRequestSerializer serializer]];
    [manager.requestSerializer setAuthorizationHeaderFieldWithUsername:login password:password];
    [manager.requestSerializer setTimeoutInterval:TIME_OUT_INTERVAL];


    [manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"JSON: %@", responseObject);
        [self parseJsonWithAccountsData:responseObject];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", operation.responseString);
        [self performSelectorOnMainThread:@selector(failedWithContactsDownload) withObject:nil waitUntilDone:YES];
    }];

您不需要覆盖类来设置请求超时间隔.

Answer 2

方法1.

我认为最好的方法是子类化AFHTTPRequestSerializer和覆盖

- (NSMutableURLRequest *)requestWithMethod:(NSString *)method
                                 URLString:(NSString *)URLString
                                parameters:(NSDictionary *)parameters

像这样:

- (NSMutableURLRequest *)requestWithMethod:(NSString *)method
                                 URLString:(NSString *)URLString
                                parameters:(NSDictionary *)parameters
{
    NSMutableURLRequest *request = [super requestWithMethod:method URLString:URLString parameters:parameters];
    [request setTimeoutInterval:YOUR_TIMEOUT_INTERVAL_HERE];

    return request;
}

然后

    NSString *urlString = [NSString stringWithFormat:@"%@/account.do?JSON&sysparm_action=getRecords",baseUrlString];

    NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"login"];
    NSString *password = [[NSUserDefaults standardUserDefaults] objectForKey:@"password"];

    [manager setRequestSerializer:YOUR_NEW_REQUEST_SERIALIZER_HERE];
    [manager.requestSerializer setAuthorizationHeaderFieldWithUsername:login password:password];


    [manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"JSON: %@", responseObject);
        [self parseJsonWithAccountsData:responseObject];
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"Error: %@", operation.responseString);
        [self performSelectorOnMainThread:@selector(failedWithContactsDownload) withObject:nil waitUntilDone:YES];
    }];

方法2

NSString *urlString = [NSString stringWithFormat:@"%@/account.do?JSON&sysparm_action=getRecords",baseUrlString];

NSString *login = [[NSUserDefaults standardUserDefaults] objectForKey:@"login"];
NSString *password = [[NSUserDefaults standardUserDefaults] objectForKey:@"password"];

[manager setRequestSerializer:[AFHTTPRequestSerializer serializer]];
[manager.requestSerializer setAuthorizationHeaderFieldWithUsername:login password:password];

NSMutableURLRequest *request = [manager.requestSerializer requestWithMethod:@"GET" URLString:[[NSURL URLWithString:urlString relativeToURL:manager.baseURL] absoluteString] parameters:nil];
[request setTimeoutInterval:YOUR_TIMEOUT_INTERVAL_HERE];

AFHTTPRequestOperation *operation = [manager HTTPRequestOperationWithRequest:request success:^(AFHTTPRequestOperation *operation, id responseObject) {
    NSLog(@"JSON: %@", responseObject);
    [self parseJsonWithAccountsData:responseObject];
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
    NSLog(@"Error: %@", operation.responseString);
    [self performSelectorOnMainThread:@selector(failedWithContactsDownload) withObject:nil waitUntilDone:YES];
}];
[manager.operationQueue addOperation:operation];

Answer 3

我有点懒要分类或子类化。您可以直接访问管理器的请求序列化器：

AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
manager.requestSerializer.timeoutInterval = INTERNET_TIMEOUT;
manager.requestSerializer.cachePolicy = NSURLRequestReloadIgnoringLocalAndRemoteCacheData;