AFNetworking says "cannot parse response"

Question

I am sending a request to server, which is handling the request and responsding. However on my app I am receiving:

Error Domain=NSURLErrorDomain Code=-1017 "cannot parse response" UserInfo=0x167668d0     
{NSErrorFailingURLStringKey=https://***, _kCFStreamErrorCodeKey=-1, 
NSErrorFailingURLKey=https://***/, NSLocalizedDescription=cannot
parse response, _kCFStreamErrorDomainKey=4, NSUnderlyingError=0x16731990 "cannot parse
response"

Accept field in http request is adequate.

I cannot even see what messege is arriving, because NSHTTPURLResponse object is null.

What can be an issue and in what way I can see what message is coming not using things like wireshark.

Thank You!

Answer 1

I got the same problem, and the reason is that the API require GET http method, and I need pass a parameter, I send it by the following code:

[request setHTTPBody:[postString dataUsingEncoding:NSUTF8StringEncoding]];

When I execute the request with GET method, it will report the error.

My solution is when the API need GET method, the parameter should add on the URL, such as http://apiserver/api?paramName=paramValue, when the API method is POST, then use the code above, set the HTTPBody for the request object.

Answer 2

If iOS cannot parse response, the problem must be in improper format http response from server, even if You are said, that everything is 100% correct, bacause other services communicate with it.

In my case an Android app communicated successfully, because network framework used there was not so restrictive and even if the content-length of http response does not fit the actual length of data, it could read this message, unlike ios.

Use tcpdump to check http communication!

Answer 3

I got the same issue when I tried to call a web method using http GET method instead of http POST. The web service method was expecting POST request not GET. Hope this information will help some one.

Answer 4

If you are using (iOS8 has a problem with this but works in iOS7)

NSData *dataToSend = [jsonData dataUsingEncoding:NSUTF16BigEndianStringEncoding] 

to send to the server, please make it as per below:

NSData *dataToSend = [jsonData dataUsingEncoding:NSUTF8StringEncoding]