CODEWITHSUNDEEP
macosnsurlsessiondatatask
Tom
Tom

Reputation: 668

NSURLSessionDataTask does not work on macOS, "A server with the specified hostname could not be found."

Why does dataTaskWithURL work on iOS, but not on macOS?

The error message is:

Client-Error: A server with the specified hostname could not be found.

My routine is as follows: 

- (void)loadHTML {
    NSString *urlString = @"https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=12630&forum=10";
    NSURL *url = [NSURL URLWithString:urlString];
    NSURLSessionDataTask *downloadTask = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
        if (error != nil) {
            NSLog(@"Client-Error:%@",error.localizedDescription);
        }
        else {
            NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
            if (httpResponse.statusCode < 200 || httpResponse.statusCode > 299) {
                NSLog(@"Server-Error:%ld",httpResponse.statusCode);
            }
            else {
                NSLog(@"Data downloaded");
            }
        }
    }];
    [downloadTask resume];
}

Upvotes: 2

Views: 430

Answers (1)

Rob
Rob

Reputation: 438232

For macOS targets, you must explicitly enable “Outbound Connections (Client)” on the “Capabilities” tab:

capabilities

Until you do that, all outbound connections will fail with NSURLErrorCannotFindHost error.

Upvotes: 5

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