iOS - 增加 AFHTTPRequestOperationManager 的超时时间答案

【问题标题】：iOS - Increase timeout for AFHTTPRequestOperationManageriOS - 增加 AFHTTPRequestOperationManager 的超时时间
【发布时间】：2014-02-09 20:28:54
【问题描述】：

我正在从非常慢的服务器下载 JSON 数据。从服务器获得响应大约需要一分钟。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];
    }];

找不到为AFHTTPRequestOperationManager 设置超时的方法。我该怎么做？

【问题讨论】：

这个问题对你有帮助吗？ stackoverflow.com/questions/19953964/… 似乎只有扩展 GET: AFHTTPRequestOperationManager 的方法才能更改超时。希望这会有所帮助。

标签： ios cocoa-touch afnetworking afnetworking-2

【解决方案1】：

在AFNetworking 2库中有AFHTTPRequestSerializer中的方法直接设置请求超时间隔。

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];
    }];

您无需重写该类来设置请求超时间隔。

【讨论】：

【解决方案2】：

方法一。

我认为最好的方法是继承AFHTTPRequestSerializer 并覆盖

- (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];
    }];

方法二

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];

【讨论】：

感谢您的回答！实际上我不得不覆盖 - (NSMutableURLRequest *)requestWithMethod:(NSString *)method URLString:(NSString *)URLString parameters:(NSDictionary *)parameters error:(NSError *__autoreleasing *)error 也，但你的答案是绝对正确的！
PgmFreek 的解决方案是 2.0 的解决方案。

【解决方案3】：

我有点懒得分类或子类化。您可以直接访问管理器的请求序列化程序：

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

【讨论】：

不幸的是它不起作用。在调试时，我发现使用此方法设置时不遵守超时。目前似乎只有子类化有效。
嗯...我使用 AFNetworking 2.5.4 运行的测试在 1 到 120 秒之间改变超时都运行良好。
嗯，这很奇怪。对我来说，无论我设置什么值（使用默认的 AFNetworking 管理器单例），AFNetworking 2.5.4 的解决方案超时始终为 ~60 秒。不过感谢您的检查，贡献良多！
@Vive 它只在我创建一个新的 requestSerializer AFJSONRequestSerializer *serializer = [AFJSONRequestSerializer serializer]; manager.requestSerializer = serializer; // Then execute the above code 时才对我有用

【解决方案4】：

创建一个子类

self.requestOperationManager.requestSerializer = [[TimeoutAFHTTPRequestSerializer alloc] initWithTimeout:30];

TimeoutAFHTTPRequestSerializer.h

#import "AFURLRequestSerialization.h"

@interface TimeoutAFHTTPRequestSerializer : AFHTTPRequestSerializer

@property (nonatomic, assign) NSTimeInterval timeout;

- (id)initWithTimeout:(NSTimeInterval)timeout;

@end

TimeoutAFHTTPRequestSerializer.m

#import "TimeoutAFHTTPRequestSerializer.h"

@implementation TimeoutAFHTTPRequestSerializer

- (id)initWithTimeout:(NSTimeInterval)timeout {

    self = [super init];
    if (self) {
        self.timeout = timeout;
    }
    return self;

}

- (NSMutableURLRequest *)requestWithMethod:(NSString *)method
                                 URLString:(NSString *)URLString
                                parameters:(NSDictionary *)parameters
                                     error:(NSError *__autoreleasing *)error
{
    NSMutableURLRequest *request = [super requestWithMethod:method URLString:URLString parameters:parameters error:error];

    if (self.timeout > 0) {
        [request setTimeoutInterval:self.timeout];
    }
    return request;
}

@end

【讨论】：

【解决方案5】：

实际上，timeoutInterval 属性的值被忽略了——我已经通过调试方法 requestWithMethod:URLString:parameters:error: 进行了检查

我设法继承并覆盖了方法 (Swift)

class RequestSerializer: AFHTTPRequestSerializer {

    override func requestWithMethod(method: String!, URLString: String!, parameters:AnyObject!, error: NSErrorPointer) -> NSMutableURLRequest {
            var req = super.requestWithMethod(method, URLString: URLString, parameters: parameters, error: error)
                req.timeoutInterval = self.timeoutInterval
                return req
    }
}

【讨论】：