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login.go
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login.go
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// Copyright 2015 Matthew Collins
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mojang
import (
"bytes"
"encoding/json"
"io/ioutil"
"net/http"
)
const (
loginURL = "https://authserver.mojang.com/authenticate"
refreshURL = "https://authserver.mojang.com/refresh"
validateURL = "https://authserver.mojang.com/validate"
)
type loginRequest struct {
Agent struct {
Name string `json:"name"`
Version int `json:"version"`
} `json:"agent"`
Username string `json:"username"`
Password string `json:"password"`
ClientToken string `json:"clientToken"`
}
type loginReply struct {
AccessToken string `json:"accessToken"`
SelectedProfile struct {
ID string `json:"id"`
Name string `json:"name"`
}
}
// Login tries to login using the passed username (or email) and password
// and returns the complete profile. error is non-nil if the login
// fails.
func Login(username, password, token string) (Profile, error) {
req := loginRequest{
Username: username,
Password: password,
ClientToken: token,
}
req.Agent.Name = "Minecraft"
req.Agent.Version = 1
b, err := json.Marshal(req)
if err != nil {
return Profile{}, err
}
r := bytes.NewReader(b)
resp, err := http.Post(loginURL, "application/json", r)
if err != nil {
return Profile{}, err
}
defer resp.Body.Close()
reply, err := ioutil.ReadAll(resp.Body)
if err != nil {
return Profile{}, err
}
var me Error
err = json.Unmarshal(reply, &me)
if err == nil && me.Type != "" {
return Profile{}, me
}
var lr loginReply
err = json.Unmarshal(reply, &lr)
return Profile{
AccessToken: lr.AccessToken,
Username: lr.SelectedProfile.Name,
ID: lr.SelectedProfile.ID,
}, err
}
type refreshRequest struct {
AccessToken string `json:"accessToken"`
ClientToken string `json:"clientToken"`
}
// Refresh attempts to refresh the passed profile's accessToken
// for futher use. The passed token should be the same as the
// one passed to Login.
func Refresh(profile Profile, token string) (Profile, error) {
req := refreshRequest{
AccessToken: profile.AccessToken,
ClientToken: token,
}
b, err := json.Marshal(req)
if err != nil {
return Profile{}, err
}
// Try to reuse old token
r := bytes.NewReader(b)
resp, err := http.Post(validateURL, "application/json", r)
if err == nil {
defer resp.Body.Close()
reply, err := ioutil.ReadAll(resp.Body)
if err == nil {
var me Error
err = json.Unmarshal(reply, &me)
if err != nil || me.Type == "" {
return profile, nil
}
}
}
r = bytes.NewReader(b)
// Try and get a updated one
resp, err = http.Post(refreshURL, "application/json", r)
if err != nil {
return Profile{}, err
}
defer resp.Body.Close()
reply, err := ioutil.ReadAll(resp.Body)
if err != nil {
return Profile{}, err
}
var me Error
err = json.Unmarshal(reply, &me)
if err == nil && me.Type != "" {
return Profile{}, me
}
var lr loginReply
err = json.Unmarshal(reply, &lr)
return Profile{
AccessToken: lr.AccessToken,
Username: lr.SelectedProfile.Name,
ID: lr.SelectedProfile.ID,
}, err
}