Question

我在失败块中获取json字符串

 NSURL *url = [[NSURL alloc] initWithString:@"http://www.vinipost.com/Services/Update/UpdateService.asmx/GetPropSubType?"];
        NSURLRequest *request = [[NSURLRequest alloc] initWithURL:url];
        [AFJSONRequestOperation addAcceptableContentTypes:[NSSet setWithObject:@"text/html"]];

        AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {

            NSLog(@"%@", JSON);
        } failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON) {
            NSLog(@"Request Failed with Error: %@, %@", error, error.userInfo);
        }];
        [operation start];

输出：

Request Failed with Error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Expected content type {(
    "text/json",
    "text/javascript",
    "application/json",
    "text/html"
)}, got text/plain" UserInfo=0x71521a0 {NSLocalizedRecoverySuggestion=[{"PropTypId":1,"PropCatId":1,"PropTyp":"Flat/ Condo"}.......**

Answer 1

您需要在操作前添加此行

[AFJSONRequestOperation addAcceptableContentTypes:
                            [NSSet setWithObject:@"text/plain"]];

Answer 2

错误很明显： Web服务返回错误的内容类型。内容类型应为以下之一：

“文本/ JSON”， “文/ JavaScript的”， “应用程序/ JSON”， “text / html的”

但它返回

文本/纯

此外，如果您查看http响应，它会在其中返回HTML TAGS，因此AFNetworking无法解析。

如果这个页面：

http://www.vinipost.com/Services/Update/UpdateService.asmx/GetPropSubType?

在您的控制之下，纠正删除html标记和更改内容类型的行为

Answer 3

在AFNetworking中，您必须在AFHTTPClient的帮助下创建NSURLRequest（首先您必须创建AFHTTPClient并且必须为此对象设置一些属性），如下所示

AFHTTPClient *httpClient = [[httpClient alloc] initWithBaseURL:[NSURL URLWithString:@"http://www.vinipost.com/"]];

[httpClient registerHTTPOperationClass:[AFJSONRequestOperation class]];
    [httpClient setDefaultHeader:@"Accept" value:@"application/json"];
    httpClient.parameterEncoding = AFJSONParameterEncoding;

现在如果依赖于GET / POST或任何其他类型的请求你需要设置参数我认为它是POST请求，所以设置参数dict并正确设置所有必需的键值对。如果不需要参数，你可以传递参数as nil

NSURLRequest *request = [httpClient requestWithMethod:@"POST" path:@"Services/Update/UpdateService.asmx/GetPropSubType?" parameters:params];
AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request
                                     success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON)
                                     {
                                         NSLog(@"%@",JSON);

                                     }
                                     failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error, id JSON)
                                     {
                                         NSLog(@"Error MSG = %@",error);
                                     }];

[operation start];

希望这对您有用：）

AFNetworking预期的内容类型错误

3 个答案: