AFNetworking JSON parsing - fails of unknown reason - objective-c

Question

im trying to parse some JSON. for simplicity ill explain using the default example at github:
when running:
NSURL *url = [NSURL URLWithString:#"http://httpbin.org/ip"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFJSONRequestOperation *operation = [AFJSONRequestOperation
JSONRequestOperationWithRequest:request success:^(
NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSLog(#"IP Address: %#", [JSON valueForKeyPath:#"origin"]);
} failure:nil];
[operation start];
i get the correct output logged. however, when i copy the example's content (which is basically 1 element) to a txt or html file (so URLWithString gets #"http:// my server address /file.txt"), putting it on my testing server and trying to prase from there, i get no output. what is wrong with this? thanks for your time!
(note: if i go to http:// my server address /file.txt i can see the contents there clearly so that's not the problem)
edit: as suggested, the content is:
"{
"origin": "10.44.119.100"
}"

Answer 1

Your problem probably has something to do with the fact that you're serving content as a text file (.txt) rather than as JSON (Content-Type: application.json / .json extension). AFNetworking is strict about HTTP standards in order to guard against unexpected behavior. Either set the correct Content-Type header on your server, or (as a hack) do AFJSONRequestOperation +addAcceptableContentTypes: adding text/plain.
As a meta note: when asking a question on Stack Overflow, specifics matter. If you had posted the error you were seeing in the console, it would be much easier to determine what the problem was. Likewise, approximate code is not actual code; if you have a problem, be specific about exactly what's going on. Details matter.

Answer 2

You should encode the json data first and then write it into the text file and when you are reading the data from file... decode the data first...
EDIT:
replace JSON operation with simple http and check if you are able to get data from there...
and if you are then JSONOperation basically is seeking for json response which is not in text file... i guess
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc]initWithRequest:request];
[operation setUploadProgressBlock:^(NSInteger bytesWritten,long long totalBytesWritten,long long totalBytesExpectedToWrite)
{
NSLog(#"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
}];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
NSLog(#" Success %#",str);
// id response = AFJSONDecode(responseObject, nil);
[self requestSucceed:response];
}
failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"error: %#", operation.responseString);
}];