Name-based Reverse Proxy by DeleGate

(preliminary memo.)
DeleGate 9.8.2 supported name-based virtual hosting as a reverse proxy by newly introduced options for the MOUNT parameter. The nvserv option is for forwarding to name based virtual hosting servers and the nvhost option is for acting as a name-based virtual hosting server.
In the following examples, the target server in each MOUNT parameter is referred with its IP-address. It can be referred with its name if it is resolvable appropriately to its address, or if rserv option is given to specify the real server name or address.

Example IP-address and names of target servers:
 192.168.1.1 www1.local (address-based server)
 192.168.1.2 www2.local (address-based server)
 192.168.1.3 nww1.local nww2.local (name-based server)
 192.168.1.4 nww1.domain nww2.domain (name-based server)

Example IP-address and names of myself (the host of DeleGate):
 aa.aa.aa.aa www.domain (address-based server)
 xx.xx.xx.xx www1.domain (address-based server)
 yy.yy.yy.yy www2.domain (address-based server)
 zz.zz.zz.zz nww1.domain nww2.domain (name-based server)

MOUNT="/v1/* http://192.168.1.1/*"
MOUNT="/v2/* http://192.168.1.2/*"
## the target server is selected based on the URL-path
## http://www.domain/v1/* >>> http://192.168.1.1/*
## http://www.domain/v2/* >>> http://192.168.1.2/*

Address-based virtual hosting to address based servers (ex. vhost=host)

MOUNT="/* http://192.168.1.1/* avhost=www1.domain"
MOUNT="/* http://192.168.1.2/* avhost=www2.domain"
## the target server is selected based on the Host: header
## http://www1.domain/* >>> http://192.168.1.1/*
## http://www2.domain/* >>> http://192.168.1.2/*

URL-path-based reverse proxy to name-based virtual servers (new)

MOUNT="/v1/* http://192.168.1.3/* nvserv=nww1.local"
MOUNT="/v2/* http://192.168.1.3/* nvserv=nww2.local"
## http://www.domain/v1/* >>> http://nww1.local/*
## http://www.domain/v2/* >>> http://nww2.local/*

Address-based virtual hosting to name-based virtual servers (new)

MOUNT="/* http://192.168.1.3/* avhost=www1.domain,nvserv=nww1.local"
MOUNT="/* http://192.168.1.3/* avhost=www2.domain,nvserv=nww2.local"
## http://www1.domain/* >>> http://nww1.local/*
## http://www2.domain/* >>> http://nww2.local/*

Name-based virtual hosting to address based servers (ex. vhost=-host)

MOUNT="/* http://192.168.1.1/* nvhost=nww1.domain"
MOUNT="/* http://192.168.1.2/* nvhost=nww2.domain"
## http://nww1.domain/* >>> http://192.168.1.1/*
## http://nww2.domain/* >>> http://192.168.1.2/*

Name-based virtual hosting to name based virtual servers (new)

MOUNT="/* http://192.168.1.3/* nvhost=nww1.domain,nvserv=nww1.local"
MOUNT="/* http://192.168.1.3/* nvhost=nww2.domain,nvserv=nww2.local"
## http://nww1.domain/* >>> http://nww1.local/*
## http://nww2.domain/* >>> http://nww2.local/*

Name-based virtual hosting to name based virtual servers (through) (new)

MOUNT="/* http://192.168.1.4/* nvhost=nww1.domain,nvserv=nww1.domain"
MOUNT="/* http://192.168.1.4/* nvhost=nww2.domain,nvserv=nww2.domain"
## http://nww1.domain/* >>> http://nww1.domain/*
## http://nww2.domain/* >>> http://nww2.domain/*

Address or name based transparent proxy (by HTTP Host: header)

SERVER=http RELAY=vhost

SERVER=http MOUNT="/* http://odst.-:-/*"
SERVER=http://odst.-:-

A single DeleGate server as a virtual hosting server or a reverse proxy can have a set of mixture of name and address-based MOUNT parameters if the mapping by the set is unique or pri=priority option is specified to make the mapping unique.