response expectedContentLength return -1

by

Ok i’ve fix it myself here is my real problem and a solution :

When i ask with Curl i can get the length no problem.

But when i use NSurlConnection 

NSURLConnection *c = [[NSURLConnection alloc] initWithRequest:req delegate:self];

The response will be compress with “Gzip” (don’t ask me why). And if the response is encode with Gzip it’s impossible to know the length, then “expectedContentLength” return -1.
And “Content-Length” is absent from [response allHeaderFields].

If you really want to get the length you can simply force to not use Gzip like this :

[req setValue:@"" forHTTPHeaderField:@"Accept-Encoding"];

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