json response is interpreted as text/plain

Question

I have the following code:

NSURL *URL = [NSURL URLWithString:[@"some-address"]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];

RKObjectRequestOperation *requestOperation = [[RKObjectRequestOperation alloc] initWithRequest:request responseDescriptors:[self.objectManager responseDescriptors]];

[requestOperation start];
[requestOperation waitUntilFinished];

I get the following error.

Object request failed: Underlying HTTP request operation failed with error: Error Domain=AFNetworkingErrorDomain Code=-1016 "Expected content type {(
    "application/x-www-form-urlencoded",
    "application/json"
)}, got text/plain" UserInfo=0x1f5e3c40 {NSLocalizedRecoverySuggestion={"total_rows":16,"offset":1,"rows":[

{"id":"1","key":1,"value":{"_id":"1","_rev":"1-e75042683867a7030fc4d3aa3b72ef35",
"user":{
"userId":"1",
"name":"A",
.......
]}}, .....

Why I get this error, when the response is in Json format?

Stefano Mondino · Accepted Answer · 2013-01-17T18:33:32.500

20

we did it. just set

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

and feel free to change RKXMLReaderSerialization class with RKNSJSONSerialization class if you're using JSON instead of XML (XML was our case).

edited Jan 17 '13 at 18:33

answered Jan 17 '13 at 18:16

Stefano Mondino

1,219
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The solution works like a charm. Thank you very much. You save my time a lot. – Thomas.Benz Sep 27 '13 at 15:33
This worked for me as well. For my use case in the setCompletionBlockWithSuccess I just checked result for nil and handled as I needed. Great tip. – Michael Nov 07 '13 at 20:11
Should use this line to add to pod file \n pod 'RKXMLReaderSerialization', :git => 'https://github.com/RestKit/RKXMLReaderSerialization.git', :branch => 'master' – Hai Hw Oct 02 '14 at 06:50
Yes, but only if you need to parse an XML. – Stefano Mondino Oct 02 '14 at 08:22

score 1 · Answer 2 · answered Jan 17 '13 at 16:33

1

You didn't set the mime-type header properly in your response. Note the error says got text/plain, while the code is expecting either application/json or application/x-www-form-urlencoded.

answered Jan 17 '13 at 16:33

Marc B

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what if MIME TYPE (server side) is not under my control? I'm using Restkit 0.20 – Stefano Mondino Jan 17 '13 at 18:06
then see if you can override/add the client-side acceptable mime-types – Marc B Jan 17 '13 at 18:07
already done. I've used this : [RKMIMETypeSerialization registerClass:[RKXMLReaderSerialization class] forMIMEType:@"text/plain"]; but it keeps on failing object mapping. Every network request/response works fine in all my app except this one. We've notified "server guys" about this bug (there's no reason to set a text/plain mimetype when you're actually sending a real, well formatted XML) but they won't fix it. There must be something inside the XML Parser (which is NOT Restkit's anymore since 0.20), maybe I should open another topic for this (nru asked about JSON) – Stefano Mondino Jan 17 '13 at 18:16

json response is interpreted as text/plain

2 Answers2