NSURL returns null while sending JSON service request?

Question

My url is http://sample_domain/sample.json?{ "language" : "en", "category" : "sports"}

I am converting this to NSURL object like below.

NSURL *url=[NSURL URLWithString:@"http://sample_domain/sample.json?{ "language" : "en", "category" : "sports"}"];

its returning nil to NSURL object, i know the URL should be in specific format from apple documentation,otherwise it will be considered as a malware site and returns nil object,

my question is how can i pass these paremeters with apple standards, so that it will not retun nil object.

Thanks in advance.

Can you encode the data differently? It might make more sense to use normal query encoding, e.g.: http://sample_domain/sample.json?language=en&category=sports As you can see, it's still the same information but now it's working much more with the way the normal web works instead of insisting on doing it differently. — Donal Fellows
Hi Donald,if i try this even in browser i am not getting response, but if i do like below NSString *str1=[@"\"lan\" : \"en\", \"cat\" : \"menus\" " stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSString *str2=[NSString stringWithFormat:@"domain/test.json?{%@}",str1]; NSURL *sample=[NSURL URLWithString:str2]; now i am getting nil url object, but if i copy and paste the 'str2' in browser i am getting response data, so here i should not encode '{' aswell NSURL should not be null, any ideas please. — mac

Vladimir Vladimir · Accepted Answer · 2010-12-23T12:00:10

Try

NSURL *url=[NSURL URLWithString:[@"http://sample_domain/sample.json?{ \"language\" : \"en\", \"category\" : \"sports\"}"
                  stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

I'm not sure why '"' characters are not escaped in your example, but I think without escapes your code should not compile.

Also you need (and that's the main problem) to replace characters that are illegal in url (e.g. ':' with corresponding percent escapes - that's what stringByAddingPercentEscapesUsingEncoding function does.

NSURL returns null while sending JSON service request?

1 Answers