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basic.go
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basic.go
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// Copyright 2020 Asim Aslam
//
// 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
//
// https://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.
//
// Original source: github.com/micro/go-micro/v3/util/token/basic/basic.go
package basic
import (
"encoding/json"
"fmt"
"time"
"github.com/google/uuid"
"github.com/micro/micro/v3/service/store"
"github.com/micro/micro/v3/internal/auth/token"
"github.com/micro/micro/v3/service/auth"
)
// Basic implementation of token provider, backed by the store
type Basic struct {
store store.Store
}
var (
// StorePrefix to isolate tokens
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
func (b *Basic) Generate(acc *auth.Account, opts ...token.GenerateOption) (*token.Token, error) {
options := token.NewGenerateOptions(opts...)
// marshal the account to bytes
bytes, err := json.Marshal(acc)
if err != nil {
return nil, err
}
// write to the store
key := uuid.New().String()
err = b.store.Write(&store.Record{
Key: fmt.Sprintf("%v%v", StorePrefix, key),
Value: bytes,
Expiry: options.Expiry,
})
if err != nil {
return nil, err
}
// return the token
return &token.Token{
Token: key,
Created: time.Now(),
Expiry: time.Now().Add(options.Expiry),
}, nil
}
// Inspect a token
func (b *Basic) Inspect(t string) (*auth.Account, error) {
// lookup the token in the store
recs, err := b.store.Read(StorePrefix + t)
if err == store.ErrNotFound {
return nil, token.ErrInvalidToken
} else if err != nil {
return nil, err
}
bytes := recs[0].Value
// unmarshal the bytes
var acc *auth.Account
if err := json.Unmarshal(bytes, &acc); err != nil {
return nil, err
}
return acc, nil
}
// String returns basic
func (b *Basic) String() string {
return "basic"
}