micro/util/token/basic/basic.go

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package basic
import (
"context"
"encoding/json"
"fmt"
"time"
"github.com/google/uuid"
"github.com/unistack-org/micro/v3/auth"
"github.com/unistack-org/micro/v3/store"
"github.com/unistack-org/micro/v3/util/token"
)
// Basic implementation of token provider, backed by the store
type Basic struct {
store store.Store
}
// StorePrefix to isolate tokens
var StorePrefix = "tokens/"
// NewTokenProvider returns an initialized basic provider
func NewTokenProvider(opts ...token.Option) token.Provider {
options := token.NewOptions(opts...)
if options.Store == nil {
options.Store = store.DefaultStore
}
return &Basic{
store: options.Store,
}
}
// Generate a token for an account
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func (b *Basic) Generate(acc *auth.Account, opts ...token.GenerateOption) (*token.Token, error) {
options := token.NewGenerateOptions(opts...)
// marshal the account to bytes
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bytes, err := json.Marshal(acc)
if err != nil {
return nil, err
}
// write to the store
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key := uuid.New().String()
err = b.store.Write(context.Background(), fmt.Sprintf("%v%v", StorePrefix, key), bytes, store.WriteTTL(options.Expiry))
if err != nil {
return nil, err
}
// return the token
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return &token.Token{
Token: key,
Created: time.Now(),
Expiry: time.Now().Add(options.Expiry),
}, nil
}
// Inspect a token
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func (b *Basic) Inspect(t string) (*auth.Account, error) {
// lookup the token in the store
var val []byte
err := b.store.Read(context.Background(), StorePrefix+t, val)
if err == store.ErrNotFound {
return nil, token.ErrInvalidToken
} else if err != nil {
return nil, err
}
// unmarshal the bytes
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var acc *auth.Account
if err := json.Unmarshal(val, &acc); err != nil {
return nil, err
}
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return acc, nil
}
// String returns basic
func (b *Basic) String() string {
return "basic"
}