Multiple HTTP Servers

Implementing multiple HTTP servers as described in CherryPy Essentials is no longer supported (see ticket #752, not there anymore?). I have been able to develop an alternative method that replaces it.

This method uses a configuration file, so you will have to rework it if you want the configuration data to be hard-coded.

Here is an example of the httpservers.ini configuration file:

#httpservers.ini
[HTTP_Addresses]
Host_1:192.168.0.10
Port_1:8080
# localhost in any case will be changed to 127.0.0.1
Host_2:LOCALHOST
Port_2:8008
# IPv6 may not be valid on old systems
Host_3:[::1]
# If blank or nonexistent will default to 80
Port_3:

Note that this is a standard format ini file, not the CherryPy version that requires values that are Python datatypes.

This file goes in the same folder as the sample page below.

Here is the source code for a sample page:

import ConfigParser
import cherrypy
from cherrypy import _cpserver
from cherrypy import _cpwsgi_server

class Home:

    def index(self):
        return 'Hello World from multiple HTTP addresses'

    index.exposed=True

oConf=ConfigParser.ConfigParser()
oConf.read('httpservers.ini')
i=0;bFirst=True;lXSvrs=[];sSect='HTTP_Addresses'
while True:
    i+=1
    sOptHost='Host_%i'%i
    sOptPort='Port_%i'%i
    if oConf.has_option(sSect,sOptHost):
        sHost=oConf.get(sSect,sOptHost)
        if len(sHost)>0:
            if sHost.lower()=='localhost':
                sHost='127.0.0.1'
            try:
                iPort=oConf.getint(sSect,sOptPort)
            except:
                iPort=80
            if bFirst:
                bFirst=False
                cherrypy.config.update({
                    #'environment':'production',
                    'server.socket_host':sHost,
                    'server.socket_port':iPort,
                    'log.access_file':'access.log',
                    'log.error_file':'error.log',
                    'log.screen':True
                })
            else:
                lXSvrs.append(_cpwsgi_server.CPWSGIServer())
                lXSvrs[-1].bind_addr=(sHost,iPort)
                lXSvrs.append(_cpserver.ServerAdapter(cherrypy.engine,lXSvrs[-1],(sHost,iPort)))
                lXSvrs[-1].subscribe()
    else:
        break
try:
    del oConf,i,bFirst,sSect,sOptHost,sOptPort,sHost,iPort
except:
    raise RuntimeError,'ABORT: httpservers.ini file is invalid.'

cherrypy.tree.mount(Home(),'/',config={
    '/':{
        'tools.response_headers.on':True,
        'tools.response_headers.headers':[
            ('Content-Type','text/plain')
        ]
    }
})
cherrypy.engine.start()
cherrypy.engine.block()

---

Here's that same code stripped down to the bare essentials, showing the addition of an SSL port:

import cherrypy
from cherrypy import _cpserver
from cherrypy import _cpwsgi_server

secure_server = _cpwsgi_server.CPWSGIServer()
secure_server.bind_addr = ('0.0.0.0', 443)
secure_server.ssl_certificate = '/etc/myapp/server.pem'
secure_server.ssl_private_key = '/etc/myapp/server.pem'
adapter = _cpserver.ServerAdapter(cherrypy.engine, secure_server, secure_server.bind_addr)
adapter.subscribe()

cherrypy.config.update({
    'server.socket_host': '0.0.0.0',
    'server.socket_port': 80,
})

cherrypy.engine.start()
cherrypy.engine.block()

--fumanchu