Run Flask on 127.0.0.2, get error "Can't assign requested address"-CodePudding

I heard that all the 127.x.x.x are loopback IPs. So I try to run Flask on 127.0.0.2 but It gets error "Can't assign requested address" instead. While it works fine on 127.0.0.1

So how can I run flask on 127.0.0.x ?

CodePudding user response：

Maybe what you looking for is to expose flask api on a different host than localhost(127.0.0.1) You can choose a different port app.run(host="0.0.0.0", port=8888)

Or host with machine hostname

from socket import gethostname
gethostname()

For custom hostname, add it in /etc/hosts file, it probably already contains a line about 127.0.0.1, in which case you just add your alias to the list

127.0.0.1 localhost localhost.localdomain myappname

in app

app.config['SERVER_NAME'] = 'myappname:5000'

for public, you would need to configure a specific dns

CodePudding user response：

Looks like your OS is a MacOS. MacOS using only 127.0.0.1 for loopback interface

But it is possible to assign 127.0.0.XX aliases manually

This article has couple completed solutions how to do that