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RestKit - expected content type / json application

When using RestKit, I experience the strangest error. Here's the localized error description -

Expected content type {(
    "application/json",
    "text/html",
    "text/plain",
    "application/x-www-form-urlencoded"
)}, got {application/json}

As you can see, I expect "application / json" as the content type, and the server returns application / json. I do not know why I get this error!

Detailed error here -

2015-02-19 11:24:43.234 MyProject[62944:10754151] E restkit.network:RKObjectRequestOperation.m:213 POST 'https://ipaddress/api/v1.0/user/verify' (200 OK / 0 objects) [request=0.1408s mapping=0.0000s total=0.1428s]: Error Domain=org.restkit.RestKit.ErrorDomain Code=-1016 "Expected content type {(
    "application/json",
    "text/html",
    "text/plain",
    "application/x-www-form-urlencoded"
)}, got {application/json" UserInfo=0x7f9c49db4930 {NSLocalizedRecoverySuggestion={"user_id":"3749f17f647c4ee1a9ee9d75c5f49f7e","domain":"domain","device_id":"2751029764","access_token":"589134b447974320b2d494a491e8226a","access_token_expiration":2181237828314,"refresh_token":"cb06c038be7b4f7c930de1fcb3f2017a"}, NSErrorFailingURLKey=https://ipaddress/api/v1.0/user/verify, AFNetworkingOperationFailingURLRequestErrorKey=<NSMutableURLRequest: 0x7f9c49def0c0> { URL: https://ipaddress/api/v1.0/user/verify }, AFNetworkingOperationFailingURLResponseErrorKey=<NSHTTPURLResponse: 0x7f9c49f567a0> { URL: https://ipaddress/api/v1.0/user/verify } { status code: 200, headers {
    "Baseline-Request-Id" = 30f91b50;
    Connection = "keep-alive";
    "Content-Length" = 230;
    "Content-Type" = "{application/json, q=1000}";
    Date = "Thu, 19 Feb 2015 19:23:48 GMT";
    Server = "nginx/1.6.2";
} }, NSLocalizedDescription=Expected content type {(
    "application/json",
    "text/html",
    "text/plain",
    "application/x-www-form-urlencoded"
)}, got {application/json}

Update -

After some debugging, I found out that the problem is the "Content-Type" value that I get in response. As you can see in the above example, the value is " {application/json, q=1000}" instead of " application/json". RestKit for some reason reads it as " {application/json" (omits the material after the decimal point and notices the initial bracket) and, therefore, does not find a match with the expected types.

"" , ( "{" "application/json" )

[RKMIMETypeSerialization registerClass:[RKNSJSONSerialization class] forMIMEType:@"{application/json"];

, . , , - ? RestKit -?

+4
1

, "". , - . "{" "application/json".

[RKMIMETypeSerialization registerClass:[RKNSJSONSerialization class] forMIMEType:@"{application/json"];
+3

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