Question

我正在尝试发布带有附件的对象。

 NSMutableURLRequest *request =
            [objectManager multipartFormRequestWithObject:reqDocObj
                                                   method:RKRequestMethodPOST
                                                     path:@"syncDocument.json"
                                               parameters:nil
                                constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
                                    [formData appendPartWithFileData:UIImagePNGRepresentation([UIImage imageNamed:@"graybox.png"])
                                                                name:@"image"
                                                            fileName:@"some_file"
                                                            mimeType:@"image/jpeg"];

            }];



RKObjectRequestOperation *operation =
            [objectManager
             objectRequestOperationWithRequest:request
                                       success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {


                                       }  
                                    failure:^(RKObjectRequestOperation *operation, NSError *error) {
                                                          NSLog(@"WS: errore operazione di richiesta %@",error);


                                        }  
             ];  


            [objectManager enqueueObjectRequestOperation:operation];

objectManager配置为：

    [objectManager setAcceptHeaderWithMIMEType:RKMIMETypeJSON];
    [objectManager setRequestSerializationMIMEType:RKMIMETypeJSON];
    objectManager.requestSerializationMIMEType = RKMIMETypeJSON;

[编辑]

我的mapepd对象是SynchDocObj：

requestDocMapping = [RKObjectMapping mappingForClass:[SynchDocObj class]];
[requestDocMapping addAttributeMappingsFromDictionary:mappingDocDict];

问题是：

1）在RKlogs中，request.body = null和JSON对象被放入表单数据

2）服务器无法解码正文，因为它是null

我的问题是：

1）我是否以错误的方式发送JSON对象？

2）如果是，我如何发送带有文件上传的JSON对象，即作为多部分请求？此致！

[溶液]

根据答案的建议，我认为解决方案是1）从表单数据而不是正文中检索映射对象; 2）或者发布一个nil对象并在表单数据中放入一个JSON字符串。

Answer 1

此：

[objectManager setRequestSerializationMIMEType:RKMIMETypeJSON];
objectManager.requestSerializationMIMEType = RKMIMETypeJSON;

是两种不同的方式来说同样的事情 - 而且你不想拥有它们中的任何一种。您需要以表单URL编码（默认值）发送请求。

最简单的方法是使用与当前代码相同的表单来创建请求，先生成JSON，然后使用appendPartWithFormData:name:将其添加到请求中（就在添加文件之前）

要生成JSON，您可以使用RestKit（RKMappingOperation），或者您只需创建一个字典/内容数组，然后使用NSJSONSerialization序列化该对象以添加到请求中。

Answer 2

分析我的代码，它就像一个魅力：

RKRequestDescriptor *requestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:[FilledExamCard defineMapping] objectClass:[MappedClassName class] rootKeyPath:nil method:RKRequestMethodPUT];

    NSData *jsonPayload = [self getJSONpayloadFromObject:mappedClassObject requestDescriptor:requestDescriptor];

    NSURL *baseURL = [NSURL URLWithString:[ZDR_BASE_URL stringByAppendingString:@"PutExamCards"]];

    AFHTTPClient *client = [AFHTTPClient clientWithBaseURL:baseURL];

    [RKMIMETypeSerialization registerClass:[RKNSJSONSerialization class] forMIMEType:@"text/plain"];
    [client setDefaultHeader:@"Accept" value:@"text/plain"];

    RKObjectManager *objectManager = [[RKObjectManager alloc] initWithHTTPClient:client];
    [objectManager setRequestSerializationMIMEType: RKMIMETypeJSON];
    [objectManager addRequestDescriptor:requestDescriptor];

    NSMutableURLRequest *request = [objectManager multipartFormRequestWithObject:nil method:RKRequestMethodPUT path:@"" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

        // Name may vary depending from server settings
        [formData appendPartWithFormData:jsonPayload name:@"model"];
    }];


    RKObjectRequestOperation *operation = [objectManager objectRequestOperationWithRequest:request success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult) {

        // Process data 

    } failure:^(RKObjectRequestOperation *operation, NSError *error) {

        // An error occurred

    }];

-(NSData*)getJSONpayloadFromObject:(NSObject*)object requestDescriptor:(RKRequestDescriptor*)requestDescriptor
{
    NSDictionary *paramObject = [RKObjectParameterization parametersWithObject:object requestDescriptor:requestDescriptor error:nil];

    NSError *error;
    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:paramObject options:NSJSONWritingPrettyPrinted error:&error];

    return jsonData;
}

发布JSON Body + MultiPart RestKit 0.2x失败

2 个答案: