NSURLSessionDownloadTask is not sending cookie in the request - macos

Question

I need to send a cookie in the request. But seems the cookie is not send. What is wrong I am doing here,
// set the cookie for getdoc request url
if (request.cookie)
{
NSDictionary *cookieProperties = #{NSHTTPCookieName : #"GetDoc",
NSHTTPCookieValue : request.cookie,
NSHTTPCookieDomain : [NSURL URLWithString:request.url].host,
// NSHTTPCookieOriginURL: request.url,
NSHTTPCookiePath : #"/",
// NSHTTPCookieVersion : #"1",
NSHTTPCookieExpires : [[NSDate date] dateByAddingTimeInterval:60*60*24*30]
};
NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:cookieProperties];
[[NSHTTPCookieStorage sharedHTTPCookieStorage] setCookie:cookie];
}
NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
// NSURLSession *session = [NSURLSession sessionWithConfiguration:sessionConfig];
NSURLSession *session = [NSURLSession sharedSession];
__block NSData *documentData = nil;
__block NSString *mimeType = nil;
DLog(#"COOKIES: %#", [NSHTTPCookieStorage sharedHTTPCookieStorage].cookies);
// retrieve the doc from url
// block the call to wait for response for kMaxBlockingTimeHttpSeconds
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
NSURLSessionDownloadTask *getDocTask = [session downloadTaskWithURL:[NSURL URLWithString:request.url]
completionHandler:^(NSURL *location,
NSURLResponse *response,
NSError *error)
{
if (error) {
NSLog(#"Error retrieving document from %#, Error: %#",
request.url, error);
res.errorCode = SCPErrorDocumentGetError;
res.errorMessage = [error localizedDescription];
} else {
mimeType = response.MIMEType;
documentData = [NSData dataWithContentsOfURL:location];
}
dispatch_semaphore_signal(sema);
}];
[getDocTask resume];
dispatch_time_t timeout = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(kMaxBlockingTimeHttpSeconds * NSEC_PER_SEC));
dispatch_semaphore_wait(sema, timeout);
if (!documentData) {
DLog(#"Response: %#", [res jsonDict]);
self.data = [NSJSONSerialization dataWithJSONObject:[res jsonDict] options:NSJSONWritingPrettyPrinted error:nil];
return;
}
NSString *str = [[NSString alloc] initWithData:documentData encoding:NSISOLatin1StringEncoding];
DLog(#"%#", str);
The NSLog printout of the cookie is,
"",
But this is not sent in the request header.

Answer 1

Adding the cookie header directly in the sessionConfig worked for me. But why did not the shareCookie work. This is supposed to work according the the documentation.
NSURLSessionConfiguration *sessionConfig = [NSURLSessionConfiguration defaultSessionConfiguration];
sessionConfig.HTTPAdditionalHeaders = #{#"Cookie" : request.cookie};