Question

简而言之：我尝试从服务器获取数据，并将http请求标头的content-type设置为@"text/html ..但由于某种原因，RestKit将其更改为application/JSON

说明： 如果我只使用AFNetworking来发出这个请求......就像魅力一样......这就是我的AFNetworking代码：

AFHTTPClient *client = [AFHTTPClient alloc] initWithBaseURL:
                                               [NSURL URLWithString:kApiBaseUrl]];
singleton.parameterEncoding = AFJSONParameterEncoding;
[singleton setDefaultHeader:@"Accept" value:@"text/html"];
[client getPath:getPath parameters:nil success:successCallback failure:failureCallback];

如果我使用完全相同的客户并将其附加到

MyClient *client = [MyClient getSingleton];  //MyClient is instantiated as above        
self.objectManager = [[RKObjectManager alloc] initWithHTTPClient:client];
self.objectManager.managedObjectStore = self.managedObjectStore;
// this should have already been done by my client, but putting
// it here just to be sure
[self.objectManager setAcceptHeaderWithMIMEType:@"text/html"];

[[RKObjectManager sharedManager] getObjectsAtPath:kGradesPath 
                                       parameters:nil 
                                          success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {
 // handle success
} failure:^(RKObjectRequestOperation *operation, NSError *error) {
 // handle failure
}];

我得到的错误是：

 restkit.network:RKObjectRequestOperation.m:576 Object request failed: 
 Underlying HTTP request operation failed with error: Error
 Domain=org.restkit.RestKit.ErrorDomain Code=-1016 "Expected content type {(
    "application/x-www-form-urlencoded",
    "application/json"
)}, got text/html" UserInfo=0x8f7acd0

挖掘主题..我在managedObjectRequestOperationWithRequest中设置了一个断点，然后我检查了HTTPRequestOperation创建的acceptableContentTypes，它没有！所以我假设RestKit只是放置自己的默认可接受的内容类型..我只是不知道在哪里以及如何防止它。想法？

p.s。我无法控制服务器，因此我无法将其content-type标题更改为application/JSON

更新

事实证明，在RKObjectRequestOperation.m中，它从mime-type获取[RKMIMETypeSerialization registeredMIMETypes];（第354行）..所以在RKMIMETypeSerialization.h中有方法：

/**
 Registers the given serialization class to handle content for the given MIME Type identifier.

 MIME Types may be given as either a string or as a regular expression that matches the MIME Types for which the given serialization should handle. Serializations are searched in the reverse order of their registration. If a registration is made for an already registered MIME Type, the new registration will take precedence.

 @param serializationClass The class conforming to the RKSerialization protocol to be registered as handling the given MIME Type.
 @param MIMETypeStringOrRegularExpression A string or regular expression specifying the MIME Type(s) that given serialization implementation is to be registered as handling.
 */
+ (void)registerClass:(Class<RKSerialization>)serializationClass forMIMEType:(id)MIMETypeStringOrRegularExpression;

如何使用它来注册text/html内容类型？

Answer 1

RestKit通常需要一个MIMEType（JSON）作为其响应数据。但是，您可以使用您找到的方法告诉它处理其他类型，例如text/plain和text/html，根据我的经验，它非常方便。将此添加到我的RestKit配置（我在我的应用程序委托中执行）允许我接受application/json和text/html作为响应数据内容类型。

[RKMIMETypeSerialization registerClass:[RKNSJSONSerialization class] forMIMEType:@"text/html"];

在我的情况下，这也很有用，因为泽西岛 - 我公司后端团队使用的Web服务框架 - 将空载荷的内容类型默认为text/plain，这会触发故障块，除非我具体说明已注册该MIMEType。

希望这有帮助。

Answer 2

我使用更改const值来输入从服务器api中恢复的类似

NSString * const RKMIMETypeJSON = @"text/html";

如果与JSON相同的recived文本结构，这种方法可以完美地运行

为什么RestKit会改变我的响应内容类型？

2 个答案: