ios - AFNetworking 500 响应正文

Question

我一直在我的应用程序中使用 AFNetworking 2.0。我注意到，如果我的 Web 服务返回 500 状态代码，我将无法获得响应正文。

这是我的 php 代码示例

try
{
    $conn = new PDO( "sqlsrv:server=$serverName;Database = $database", $uid, $pwd);
    $conn->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
    return $conn;
}

catch( PDOException $e )
{
    $response->status(500);
    echo( "Connection Error: " . $e->getMessage() );
}

如果我使用简单的休息客户端，这是响应主体的示例。

Connection Error: SQLSTATE[08001]: [Microsoft][SQL Server Native Client 11.0]SQL Server Network Interfaces: Error Locating Server/Instance Specified [xFFFFFFFF]. 

然而，这似乎是我能从 AFNetworking 得到的唯一回应

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (JSON text did not start with array or object and option to allow fragments not set.) UserInfo=0x15e58fa0 {NSDebugDescription=JSON text did not start with array or object and option to allow fragments not set.}

这是执行此操作的我的 objective-c 代码的一部分。

...} failure:^(NSURLSessionDataTask *task, NSError *error) {

        NSLog(@"%@",error.description);

    }];

有什么方法可以获得响应正文吗？

编辑:澄清更多代码

下面是我的 AFHTTPSessionManager 子类的一部分

@implementation MSMAMobileAPIClient

    + (MSMAMobileAPIClient *)sharedClient {
        static MSMAMobileAPIClient *_sharedClient = nil;
        static dispatch_once_t onceToken;
        dispatch_once(&onceToken, ^{
            _sharedClient = [[MSMAMobileAPIClient alloc] initWithDefaultURL];
        });

        return _sharedClient;
    }

    - (id)initWithDefaultURL {
        return [self initWithBaseURL:[NSURL URLWithString:[NSString stringWithFormat:@"https://%@/mamobile/index.php/" ,[[NSUserDefaults standardUserDefaults] stringForKey:@"serviceIPAddress"]]]];
    }

    - (id)initWithBaseURL:(NSURL *)url {

        self = [super initWithBaseURL:url];
        if (!self) {
            return nil;
        }
        self.responseSerializer = [AFCompoundResponseSerializer compoundSerializerWithResponseSerializers:@[[AFJSONResponseSerializer serializer], [AFHTTPResponseSerializer serializer]]];

        return self;
    }

我尝试将响应序列化程序设置为 AFCompoundResponseSerializer，但它似乎没有什么不同

下面是一个我称之为图书馆员的子类的例子。

-(void)searchForItemWithString:(NSString *)searchString withCompletionBlock:(arrayBlock)block {

    self.inventorySearchBlock = block;

    NSDictionary *parameters = @{@"query": searchString};

    [[MSMAMobileAPIClient sharedClient] GET:@"inventory/search" parameters:parameters success:^(NSURLSessionDataTask *task, id responseObject) {

        if (!responseObject) {
            NSLog(@"Error parsing JSON");
        } else {
            //do stuff with the json dictionary that's returned..
        }

    } failure:^(NSURLSessionDataTask *task, NSError *error) {

        NSLog(@"Error: %@",error.description);

    }];

}

Answer 1

更新:我已经创建了一个 github 存储库来包含我正在使用的最新代码。所有更改都将发布在那里。 https://github.com/Hackmodford/HMFJSONResponseSerializerWithData

答案来自github上的这个issue。 https://github.com/AFNetworking/AFNetworking/issues/1397

gfiumara 是想出这个的开发者。我只是稍微修改了他的 AFJSONResponseSerializer 子类以包含一个实际的字符串而不是 NSData

//MSJSONResponseSerializerWithData.h

#import "AFURLResponseSerialization.h"

/// NSError userInfo key that will contain response data
static NSString * const JSONResponseSerializerWithDataKey = @"JSONResponseSerializerWithDataKey";

@interface MSJSONResponseSerializerWithData : AFJSONResponseSerializer

@end

---

//  MSJSONResponseSerializerWithData.m

#import "MSJSONResponseSerializerWithData.h"

@implementation MSJSONResponseSerializerWithData

- (id)responseObjectForResponse:(NSURLResponse *)response
                           data:(NSData *)data
                          error:(NSError *__autoreleasing *)error
{
    if (![self validateResponse:(NSHTTPURLResponse *)response data:data error:error]) {
        if (*error != nil) {
            NSMutableDictionary *userInfo = [(*error).userInfo mutableCopy];
            userInfo[JSONResponseSerializerWithDataKey] = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
            NSError *newError = [NSError errorWithDomain:(*error).domain code:(*error).code userInfo:userInfo];
            (*error) = newError;
        }

        return (nil);
    }

    return ([super responseObjectForResponse:response data:data error:error]);
}

@end

这是我如何在失败 block 中使用它的示例。

} failure:^(NSURLSessionDataTask *task, NSError *error) {
        NSLog(@"%@",[error.userInfo objectForKey:@"JSONResponseSerializerWithDataKey"]); 
    }];