无法从 Javascript net::ERR_CONNECTION_REFUSED 访问 localhost

Question

I have a node.js express server hosting my API on port 7070. I have a Flask server hosting my webpage on port 5000. I can access my API from the server using curl with curl http://localhost:7070/latest and the API returns the result successfully. On my webserver I am trying to call the API using getJSON however it only works when I replace localhost with the server local IP.

If I try to access my API using localhost with http://127.0.0.1:7070/latest , or http://localhost:7070/latest create a net::ERR_CONNECTION_REFUSED an error is thrown in chrome.

If I change localhost to my local IP 192.168.68.72 for http://192.168.68.72:7070/latest it works correctly. I need to use localhost as my application is self-hosted so the URL can't be hard linked.

What am I doing wrong here, I have searched previous issues and have checked that the port is open with netstat -tnlp

Is there some other way I need to say connect to the same server but on a different port instead of localhost?

Thanks

Answer 1

Thanks to Chris I realised that localhost was looking at my own PC and not the server PC.

To fix this I used "//" + location.hostname + ":7070/latest" instead of http://localhost:7070/latest and it worked perfectly.