RestKit：POST錯誤（加載了無法處理的錯誤響應（400））

Question

我整天都有這個問題。我正在使用RestKit，並且已經成功地發出GET請求並將所有信息映射到對象中。下面是一段代碼片段，其中我提出了GET請求，然後是POST請求（用於測試）。我將剛收到的對象再次發佈到服務器。但！我的POST請求失敗。我嘗試用Chrome插件Postman測試REST API，確認REST API工作正常。下面是這使得GET和POST請求的代碼：

- (void)loadSample 
{ 
    [[RKObjectManager sharedManager] getObjectsAtPath:@"sampling/243570" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { 
     Sample *obj = [mappingResult.array firstObject]; 
     [[SampleList sharedInstance] addSample:obj]; 
     [self.tableView reloadData]; 


     [[RKObjectManager sharedManager] postObject:obj path:@"sampling" parameters:nil success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) { 
      NSLog(@"POST: Success"); 
     } failure:^(RKObjectRequestOperation *operation, NSError *error) { 
      NSLog(@"POST: Failure"); 
     }]; 

    } failure:nil]; 
} 

我碰到下面的調試消息時嘗試後：

restkit.network:RKObjectRequestOperation.m:208 POST 'https://XXXX.dk/api/sampling'（ 400錯誤請求/ 0對象）[request = 0.0258s mapping = 0.0000s total = 0.0320s]： error =錯誤域= org.restkit.RestKit.ErrorDomain代碼= -1016「預期內容類型{（ 」application/x -www-form-urlencoded「， 」application/json「 ）}，得到text/plain」UserInfo = 0x10a81f5d0 {NSLo calizedRecoverySuggestion =，NSErrorFailingURLKey = https://XXXX.dk/api/sampling，AFNetworkingOperationFailingURLRequestErrorKey = {URL：https://XXXX.dk/api/sampling}，AFNetworkingOperationFailingURLResponseErrorKey = {URL：https://XXXX.dk/api/sampling} {狀態碼：400，標頭{ 「緩存控制」= 「無緩存」; 「Content-Length」= 0; 日期=「星期四，2014年7月24日17:21:57 GMT」; Expires =「-1」; Pragma =「no-cache」; Server =「Microsoft-IIS/8.0」; 「X-AspNet-Version」=「4.0.30319」; 「X-Powered-By」=「ASP.NET」; }}，NSLocalizedDescription =預期的內容類型{（ 「應用程序/ x WWW的形式進行了urlencoded」， 「應用/ JSON」 ）}，得到純文本/} response.body =

所以我添加的方法如下行：configureRestKit（見下表）

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

，並得到了下面的調試消息我POST請求。看了一整天，並看不到我在錯誤期間，因爲它處理我的GET請求完美（所以我不認爲我的映射是不正確的）：

2014-07-24 18：46：21.199 XXXX [1492：60B] T，restkit.network:RKObjectRequestOperation.m:148 POST 'https://XXXX.dk/api/sampling'：

request.headers = { 「接受 - 語言」=「DA; q = 1，連接; q = 0.9，fr; q = 0.8，de; q = 0.7，zh-Hans; q = 0.6，zh-Hant; q = 0.5「; Authorization = XXXX.dk; 「Content-Type」=「application/json」; 「User-Agent」=「XXXX/1.0（iPhone Simulator; iOS 7.1; Scale/2.00）」; }

request.body =（空）

2014年7月24日18：46：21.234 XXXX.dk [1492：F03]Èrestkit.network:RKObjectRequestOperation.m:208 POST 'https://XXXX.dk/api/sampling'（ 400 Bad Request/0 objects）[request = 0.0343s mapping = 0.0000s total = 0.0405s]： error = Error Domain = org.restkit.RestKit.ErrorDomain Code = -1011「加載了一個無法處理的錯誤響應（400）」UserInfo = 0x10a6b5780 {NSLocalizedDescription =加載了一個無法處理的錯誤響應（400），NSErrorFailingURLKey = https://XXXX.dk/api/sampling} 響應。體=

我使用RestKit的配置如下：

- (void)configureRestKit 
{  
    // initialize AFNetworking HTTPClient 
    NSURL *baseURL = [NSURL URLWithString:@"https://XXXX.dk/api/"]; 
    AFHTTPClient *client = [[AFHTTPClient alloc] initWithBaseURL:baseURL]; 


    // initialize RestKit 
    RKObjectManager *objectManager = [[RKObjectManager alloc] initWithHTTPClient:client]; 
    [objectManager.HTTPClient setDefaultHeader:@"Content-Type" value:@"application/json"]; 
    [RKMIMETypeSerialization registerClass:[RKNSJSONSerialization class] forMIMEType:@"text/plain"]; 

    // register mappings with the provider using a response descriptor 
    RKResponseDescriptor *responseDescriptor = 
    [RKResponseDescriptor responseDescriptorWithMapping:[MappingProvider sampleMapping] 
               method:RKRequestMethodGET 
              pathPattern:nil 
               keyPath:nil 
              statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]; 

    [objectManager addResponseDescriptor:responseDescriptor]; 
} 

[MappingProvider sampleMapping]是返回以下結果：

+ (RKObjectMapping *) sampleMapping { 
    RKObjectMapping *sampleMapping = [RKObjectMapping mappingForClass:[Sample class]]; 
    [sampleMapping addAttributeMappingsFromDictionary:@{ 
                 @"SampleId":  @"sampleId", 
                 @"Type":   @"type", 
                 @"Scope":   @"scope", 
                 @"SamplingMethod": @"samplingMethod" 
                 }]; 

    [sampleMapping addPropertyMapping:[MappingProvider fieldAnalysisMapping]]; 
    [sampleMapping addPropertyMapping:[MappingProvider sampleDataMapping]]; 
    [sampleMapping addPropertyMapping:[MappingProvider laboratoryAnalysisMapping]]; 

    return sampleMapping; 

}

Answer 1

溶液由於Wain

我試圖實現一個RKRequestDescriptor。我添加了以下代碼：

RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:[[MappingProvider sampleMapping] inverseMapping] objectClass:[Sample class] rootKeyPath:nil method:RKRequestMethodAny]; 
[objectManager addRequestDescriptor:requestDescriptor];