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token_service.go
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token_service.go
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package service
import (
"context"
"errors"
"github.com/dgrijalva/jwt-go"
. "github.com/longjoy/micro-go-book/ch13-seckill/oauth-service/model"
uuid "github.com/satori/go.uuid"
"net/http"
"strconv"
"time"
)
var (
ErrNotSupportGrantType = errors.New("grant type is not supported")
ErrNotSupportOperation = errors.New("no support operation")
ErrInvalidUsernameAndPasswordRequest = errors.New("invalid username, password")
ErrInvalidTokenRequest = errors.New("invalid token")
ErrExpiredToken = errors.New("token is expired")
)
type TokenGranter interface {
Grant(ctx context.Context, grantType string, client *ClientDetails, reader *http.Request) (*OAuth2Token, error)
}
type ComposeTokenGranter struct {
TokenGrantDict map[string]TokenGranter
}
func NewComposeTokenGranter(tokenGrantDict map[string]TokenGranter) TokenGranter {
return &ComposeTokenGranter{
TokenGrantDict: tokenGrantDict,
}
}
func (tokenGranter *ComposeTokenGranter) Grant(ctx context.Context, grantType string, client *ClientDetails, reader *http.Request) (*OAuth2Token, error) {
dispatchGranter := tokenGranter.TokenGrantDict[grantType]
if dispatchGranter == nil {
return nil, ErrNotSupportGrantType
}
return dispatchGranter.Grant(ctx, grantType, client, reader)
}
type UsernamePasswordTokenGranter struct {
supportGrantType string
userDetailsService UserDetailsService
tokenService TokenService
}
func NewUsernamePasswordTokenGranter(grantType string, userDetailsService UserDetailsService, tokenService TokenService) TokenGranter {
return &UsernamePasswordTokenGranter{
supportGrantType: grantType,
userDetailsService: userDetailsService,
tokenService: tokenService,
}
}
func (tokenGranter *UsernamePasswordTokenGranter) Grant(ctx context.Context,
grantType string, client *ClientDetails, reader *http.Request) (*OAuth2Token, error) {
if grantType != tokenGranter.supportGrantType {
return nil, ErrNotSupportGrantType
}
// 从请求体中获取用户名密码
username := reader.FormValue("username")
password := reader.FormValue("password")
if username == "" || password == "" {
return nil, ErrInvalidUsernameAndPasswordRequest
}
// 验证用户名密码是否正确
userDetails, err := tokenGranter.userDetailsService.GetUserDetailByUsername(ctx, username, password)
if err != nil {
return nil, ErrInvalidUsernameAndPasswordRequest
}
// 根据用户信息和客户端信息生成访问令牌
return tokenGranter.tokenService.CreateAccessToken(&OAuth2Details{
Client: client,
User: userDetails,
})
}
type RefreshTokenGranter struct {
supportGrantType string
tokenService TokenService
}
func NewRefreshGranter(grantType string, userDetailsService UserDetailsService, tokenService TokenService) TokenGranter {
return &RefreshTokenGranter{
supportGrantType: grantType,
tokenService: tokenService,
}
}
func (tokenGranter *RefreshTokenGranter) Grant(ctx context.Context, grantType string, client *ClientDetails, reader *http.Request) (*OAuth2Token, error) {
if grantType != tokenGranter.supportGrantType {
return nil, ErrNotSupportGrantType
}
// 从请求中获取刷新令牌
refreshTokenValue := reader.URL.Query().Get("refresh_token")
if refreshTokenValue == "" {
return nil, ErrInvalidTokenRequest
}
return tokenGranter.tokenService.RefreshAccessToken(refreshTokenValue)
}
type TokenService interface {
// 根据访问令牌获取对应的用户信息和客户端信息
GetOAuth2DetailsByAccessToken(tokenValue string) (*OAuth2Details, error)
// 根据用户信息和客户端信息生成访问令牌
CreateAccessToken(oauth2Details *OAuth2Details) (*OAuth2Token, error)
// 根据刷新令牌获取访问令牌
RefreshAccessToken(refreshTokenValue string) (*OAuth2Token, error)
// 根据用户信息和客户端信息获取已生成访问令牌
GetAccessToken(details *OAuth2Details) (*OAuth2Token, error)
// 根据访问令牌值获取访问令牌结构体
ReadAccessToken(tokenValue string) (*OAuth2Token, error)
}
type DefaultTokenService struct {
tokenStore TokenStore
tokenEnhancer TokenEnhancer
}
func NewTokenService(tokenStore TokenStore, tokenEnhancer TokenEnhancer) TokenService {
return &DefaultTokenService{
tokenStore: tokenStore,
tokenEnhancer: tokenEnhancer,
}
}
func (tokenService *DefaultTokenService) CreateAccessToken(oauth2Details *OAuth2Details) (*OAuth2Token, error) {
existToken, err := tokenService.tokenStore.GetAccessToken(oauth2Details)
var refreshToken *OAuth2Token
if err == nil {
// 存在未失效访问令牌,直接返回
if !existToken.IsExpired() {
tokenService.tokenStore.StoreAccessToken(existToken, oauth2Details)
return existToken, nil
}
// 访问令牌已失效,移除
tokenService.tokenStore.RemoveAccessToken(existToken.TokenValue)
if existToken.RefreshToken != nil {
refreshToken = existToken.RefreshToken
tokenService.tokenStore.RemoveRefreshToken(refreshToken.TokenType)
}
}
if refreshToken == nil || refreshToken.IsExpired() {
refreshToken, err = tokenService.createRefreshToken(oauth2Details)
if err != nil {
return nil, err
}
}
// 生成新的访问令牌
accessToken, err := tokenService.createAccessToken(refreshToken, oauth2Details)
if err == nil {
// 保存新生成令牌
tokenService.tokenStore.StoreAccessToken(accessToken, oauth2Details)
tokenService.tokenStore.StoreRefreshToken(refreshToken, oauth2Details)
}
return accessToken, err
}
func (tokenService *DefaultTokenService) createAccessToken(refreshToken *OAuth2Token, oauth2Details *OAuth2Details) (*OAuth2Token, error) {
validitySeconds := oauth2Details.Client.AccessTokenValiditySeconds
s, _ := time.ParseDuration(strconv.Itoa(validitySeconds) + "s")
expiredTime := time.Now().Add(s)
accessToken := &OAuth2Token{
RefreshToken: refreshToken,
ExpiresTime: &expiredTime,
TokenValue: uuid.NewV4().String(),
}
if tokenService.tokenEnhancer != nil {
return tokenService.tokenEnhancer.Enhance(accessToken, oauth2Details)
}
return accessToken, nil
}
func (tokenService *DefaultTokenService) createRefreshToken(oauth2Details *OAuth2Details) (*OAuth2Token, error) {
validitySeconds := oauth2Details.Client.RefreshTokenValiditySeconds
s, _ := time.ParseDuration(strconv.Itoa(validitySeconds) + "s")
expiredTime := time.Now().Add(s)
refreshToken := &OAuth2Token{
ExpiresTime: &expiredTime,
TokenValue: uuid.NewV4().String(),
}
if tokenService.tokenEnhancer != nil {
return tokenService.tokenEnhancer.Enhance(refreshToken, oauth2Details)
}
return refreshToken, nil
}
func (tokenService *DefaultTokenService) RefreshAccessToken(refreshTokenValue string) (*OAuth2Token, error) {
refreshToken, err := tokenService.tokenStore.ReadRefreshToken(refreshTokenValue)
if err == nil {
if refreshToken.IsExpired() {
return nil, ErrExpiredToken
}
oauth2Details, err := tokenService.tokenStore.ReadOAuth2DetailsForRefreshToken(refreshTokenValue)
if err == nil {
oauth2Token, err := tokenService.tokenStore.GetAccessToken(oauth2Details)
// 移除原有的访问令牌
if err == nil {
tokenService.tokenStore.RemoveAccessToken(oauth2Token.TokenValue)
}
// 移除已使用的刷新令牌
tokenService.tokenStore.RemoveRefreshToken(refreshTokenValue)
refreshToken, err = tokenService.createRefreshToken(oauth2Details)
if err == nil {
accessToken, err := tokenService.createAccessToken(refreshToken, oauth2Details)
if err == nil {
tokenService.tokenStore.StoreAccessToken(accessToken, oauth2Details)
tokenService.tokenStore.StoreRefreshToken(refreshToken, oauth2Details)
}
return accessToken, err
}
}
}
return nil, err
}
func (tokenService *DefaultTokenService) GetAccessToken(details *OAuth2Details) (*OAuth2Token, error) {
return tokenService.tokenStore.GetAccessToken(details)
}
func (tokenService *DefaultTokenService) ReadAccessToken(tokenValue string) (*OAuth2Token, error) {
return tokenService.tokenStore.ReadAccessToken(tokenValue)
}
func (tokenService *DefaultTokenService) GetOAuth2DetailsByAccessToken(tokenValue string) (*OAuth2Details, error) {
accessToken, err := tokenService.tokenStore.ReadAccessToken(tokenValue)
if err == nil {
if accessToken.IsExpired() {
return nil, ErrExpiredToken
}
return tokenService.tokenStore.ReadOAuth2Details(tokenValue)
}
return nil, err
}
type TokenStore interface {
// 存储访问令牌
StoreAccessToken(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details)
// 根据令牌值获取访问令牌结构体
ReadAccessToken(tokenValue string) (*OAuth2Token, error)
// 根据令牌值获取令牌对应的客户端和用户信息
ReadOAuth2Details(tokenValue string) (*OAuth2Details, error)
// 根据客户端信息和用户信息获取访问令牌
GetAccessToken(oauth2Details *OAuth2Details) (*OAuth2Token, error)
// 移除存储的访问令牌
RemoveAccessToken(tokenValue string)
// 存储刷新令牌
StoreRefreshToken(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details)
// 移除存储的刷新令牌
RemoveRefreshToken(oauth2Token string)
// 根据令牌值获取刷新令牌
ReadRefreshToken(tokenValue string) (*OAuth2Token, error)
// 根据令牌值获取刷新令牌对应的客户端和用户信息
ReadOAuth2DetailsForRefreshToken(tokenValue string) (*OAuth2Details, error)
}
func NewJwtTokenStore(jwtTokenEnhancer *JwtTokenEnhancer) TokenStore {
return &JwtTokenStore{
jwtTokenEnhancer: jwtTokenEnhancer,
}
}
type JwtTokenStore struct {
jwtTokenEnhancer *JwtTokenEnhancer
}
func (tokenStore *JwtTokenStore) StoreAccessToken(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details) {
}
func (tokenStore *JwtTokenStore) ReadAccessToken(tokenValue string) (*OAuth2Token, error) {
oauth2Token, _, err := tokenStore.jwtTokenEnhancer.Extract(tokenValue)
return oauth2Token, err
}
// 根据令牌值获取令牌对应的客户端和用户信息
func (tokenStore *JwtTokenStore) ReadOAuth2Details(tokenValue string) (*OAuth2Details, error) {
_, oauth2Details, err := tokenStore.jwtTokenEnhancer.Extract(tokenValue)
return oauth2Details, err
}
// 根据客户端信息和用户信息获取访问令牌
func (tokenStore *JwtTokenStore) GetAccessToken(oauth2Details *OAuth2Details) (*OAuth2Token, error) {
return nil, ErrNotSupportOperation
}
// 移除存储的访问令牌
func (tokenStore *JwtTokenStore) RemoveAccessToken(tokenValue string) {
}
// 存储刷新令牌
func (tokenStore *JwtTokenStore) StoreRefreshToken(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details) {
}
// 移除存储的刷新令牌
func (tokenStore *JwtTokenStore) RemoveRefreshToken(oauth2Token string) {
}
// 根据令牌值获取刷新令牌
func (tokenStore *JwtTokenStore) ReadRefreshToken(tokenValue string) (*OAuth2Token, error) {
oauth2Token, _, err := tokenStore.jwtTokenEnhancer.Extract(tokenValue)
return oauth2Token, err
}
// 根据令牌值获取刷新令牌对应的客户端和用户信息
func (tokenStore *JwtTokenStore) ReadOAuth2DetailsForRefreshToken(tokenValue string) (*OAuth2Details, error) {
_, oauth2Details, err := tokenStore.jwtTokenEnhancer.Extract(tokenValue)
return oauth2Details, err
}
type TokenEnhancer interface {
// 组装 Token 信息
Enhance(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details) (*OAuth2Token, error)
// 从 Token 中还原信息
Extract(tokenValue string) (*OAuth2Token, *OAuth2Details, error)
}
type OAuth2TokenCustomClaims struct {
UserDetails UserDetails
ClientDetails ClientDetails
RefreshToken OAuth2Token
jwt.StandardClaims
}
type JwtTokenEnhancer struct {
secretKey []byte
}
func NewJwtTokenEnhancer(secretKey string) TokenEnhancer {
return &JwtTokenEnhancer{
secretKey: []byte(secretKey),
}
}
func (enhancer *JwtTokenEnhancer) Enhance(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details) (*OAuth2Token, error) {
return enhancer.sign(oauth2Token, oauth2Details)
}
func (enhancer *JwtTokenEnhancer) Extract(tokenValue string) (*OAuth2Token, *OAuth2Details, error) {
token, err := jwt.ParseWithClaims(tokenValue, &OAuth2TokenCustomClaims{}, func(token *jwt.Token) (i interface{}, e error) {
return enhancer.secretKey, nil
})
if err == nil {
claims := token.Claims.(*OAuth2TokenCustomClaims)
expiresTime := time.Unix(claims.ExpiresAt, 0)
return &OAuth2Token{
RefreshToken: &claims.RefreshToken,
TokenValue: tokenValue,
ExpiresTime: &expiresTime,
}, &OAuth2Details{
User: &claims.UserDetails,
Client: &claims.ClientDetails,
}, nil
}
return nil, nil, err
}
func (enhancer *JwtTokenEnhancer) sign(oauth2Token *OAuth2Token, oauth2Details *OAuth2Details) (*OAuth2Token, error) {
expireTime := oauth2Token.ExpiresTime
clientDetails := *oauth2Details.Client
userDetails := *oauth2Details.User
clientDetails.ClientSecret = ""
userDetails.Password = ""
claims := OAuth2TokenCustomClaims{
UserDetails: userDetails,
ClientDetails: clientDetails,
StandardClaims: jwt.StandardClaims{
ExpiresAt: expireTime.Unix(),
Issuer: "System",
},
}
if oauth2Token.RefreshToken != nil {
claims.RefreshToken = *oauth2Token.RefreshToken
}
token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
tokenValue, err := token.SignedString(enhancer.secretKey)
if err == nil {
oauth2Token.TokenValue = tokenValue
oauth2Token.TokenType = "jwt"
return oauth2Token, nil
}
return nil, err
}