Minecraft Forums

Well, with the old launcher, I was able to create a batch file that allowed for me to automatically start playing Minecraft. I read on the wiki and it said that the launcher accepted a username and a server:port command, for the username I tried entering my username, profile name, and email, and it did not do anything, and neither did the server port command. I am using the exact syntax that is on the wiki, so I do not understand what is wrong.

Wiki format:

java -cp Minecraft.jar net.minecraft.bootstrap.Bootstrap <username> <server:port>

I also tried using the -u= in front of the username, but then the launcher gives "exit code 1." So, I am just wondering, how do I auto login with the launcher, or is it even possible? Also, are there parameters for selecting a profile? What about changing the version of the current profile with a parameter?

Thanks!

It's somewhat complicated to get it to launch now using just command line :/

Right now, the only way I can figure out how to do it is through a script that generates a session token for you, then runs the Java thing. I have no idea how to generate the script it runs, though :/

#/usr/bin/env python

import urllib2
import sys
import getpass
import json

if len(sys.argv) != 3:
    username = raw_input('Username: ')
    password = getpass.getpass('Password: ')
else:
    username = sys.argv[1]
    password = sys.argv[2]

data = {
    "agent": {
        "name": "Minecraft",
        "version": 1
    },
    "username": username,
    "password": password
}

req = urllib2.Request(url='https://authserver.mojang.com/authenticate', data=json.dumps(data), headers={"Content-Type": "application/json"})
json = json.loads(urllib2.urlopen(req).read())

username = json['selectedProfile']['name']
access_token = json['accessToken']
profile_id = json['selectedProfile']['id']

session_param = 'token:%s:%s' % (access_token, profile_id)

print username
print session_param

This will print out the token you need when run. It should be run like (name of file) (email address) (password). It will then display a session token for you followed by a line break, then the username, which is everything needed to run it that's not static.

... there is a slight chance I might be overlooking something, though. Please do let me know if you find a solution