It is not possible given current state of laws. For instance, the Bombay prohibition act prohibits transport, buying, selling, stocking, producing and consuming alcoholic drinks unless done in the manner prescribed by law. For doing any of the above, you need a license. Hence, it is not really possible to either buy or sell alcohol without violating the law. Given the present content of law, one can not even home deliver alcohol - it must be bought from a licensed shop only. Selling liquor online, microbrewery etc. are illegal in India until laws are reformed. It is a different thing that the administration does not apply these archaic laws.
Please note that states have different laws with respect to liquor control and it is a state subject. State governments can reform the laws but there is little political will in this regard.
In Bangalore, Madhuloka sells hard drinks online and even offers home delivery for FREE in Bangalore. It is primarily a brick and mortar liquor store chain with a website.