CherryPy Hello World error

Question

When I am running CherryPy Hello World:

import cherrypy

class HelloWorld:
    def index(self):
        return "Hello world!"
    index.exposed = True

cherrypy.config.update({'server.socket_port': 8080,})
cherrypy.quickstart(HelloWorld())

... I get this: IOError: Port 8080 not bound on 'localhost'. What could it be?

Answer 1

I think I had a similar problem when I started using CherryPy... But I can't remember exactly what it was... But the fix involved using a config file instead of passing the configs by hand:

MyProj.conf:

[global]
server.socket_host = "127.0.0.1"
server.socket_port = 8080
server.thread_pool = 10

MyProj.py

import os
import cherrypy

class HelloWorld:
    def index(self):
        return "Hello world!"
    index.exposed = True

# Assumes the config file is in the directory as the source.    
conf_path = os.path.dirname(os.path.abspath(__file__))
conf_path = os.path.join(conf_path, "MyProj.conf")
cherrypy.config.update(conf_path)
cherrypy.quickstart(HelloWorld())

This definitely works here.
I'm using Python 2.6.1 and CherryPy 3.1.1 and I run the script with -W ignore:

c:\My_path> python -W ignore MyProj.py

If you're under *nix, you should put the -W ignore in the #! comment at the top of the file.