cURL Error Code: 7 cURL Error Message: Failed to connect to 127.0.0.1 port 9200: Connection refused cURL Error Code: 7 cURL Error Message: Failed to connect to 127.0.0.1 port 9200: Connection refused
https://onevcat.com/2012/04/objective-c-runtime/ This blog can tell us the details ....Every program both has its feature that's why it's still be invented ....It's a good question ......