iOS-增加AFHTTPRequestOperationManager的超时

Question

我正在从速度非常慢的服务器上下载JSON数据。 从服务器获取恢复大约需要一分钟。 我使用AFNetworking库，并且我的代码抛出“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AFHTTPRequestOperationManager 。 我该怎么做？

Answer 1

在AFNetworking 2库中， AFHTTPRequestSerializer有一个方法可以AFHTTPRequestSerializer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];
    }];

您无需重写类即可设置请求超时间隔。

Answer 2

方法1

我认为最好的方法是AFHTTPRequestSerializer并重写

- (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;

Answer 4

创建一个子类

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

超时AFHTTPRequestSerializer.h

#import "AFURLRequestSerialization.h"

@interface TimeoutAFHTTPRequestSerializer : AFHTTPRequestSerializer

@property (nonatomic, assign) NSTimeInterval timeout;

- (id)initWithTimeout:(NSTimeInterval)timeout;

@end

超时AFHTTPRequestSerializer.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

Answer 5

实际上， timeoutInterval属性的值将被忽略-我已经通过调试方法requestWithMethod:URLString:parameters:error:

我设法继承并重写了方法（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
    }
}