ios - RestKit - 预期的内容类型 application/json

Question

我在使用 RestKit 时遇到了最奇怪的错误。这是错误的本地化描述 -

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

如您所见，我希望将“application/json”作为内容类型，并且服务器正在返回 application/json。我不知道为什么会收到此错误!

详细错误在这里——

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}

---

更新--

经过一些调试，我发现问题出在我在响应中得到的“Content-Type”的值上。正如您在上面的示例中看到的，该值是“{application/json, q=1000}”而不是“application/json”。由于某种原因，RestKit 将其读取为“{application/json”(省略逗号后的内容，并注意起始大括号)，因此找不到与预期类型的​​匹配项。

为了以肮脏的方式“解决”它，我添加了以下行(注意“application/json”之前的“{”)

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

但我们都知道这不是正确的方法。我不知道这里出了什么问题，服务器发送的内容不正确吗？还是 RestKit 应该以不同的方式解读它？

Answer 1

我找不到服务器返回“错误”内容类型的原因。服务器的开发人员否认它做错了什么。所以我最终使用了我的肮脏技巧并在“application/json”之前添加了一个“{”。

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