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Cache policies when the first authorization request happens and delete them when removing policies Signed-off-by: Rodney Osodo <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,6 @@ | ||
| // Copyright (c) Abstract Machines | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| // Package cache contains the domain concept definitions needed to | ||
| // support Magistrala auth cache service functionality. | ||
| package cache |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,87 @@ | ||
| // Copyright (c) Abstract Machines | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
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| package cache | ||
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| import ( | ||
| "context" | ||
| "strings" | ||
| "time" | ||
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| "github.com/absmach/magistrala/auth" | ||
| "github.com/absmach/magistrala/pkg/errors" | ||
| repoerr "github.com/absmach/magistrala/pkg/errors/repository" | ||
| "github.com/go-redis/redis/v8" | ||
| ) | ||
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| const defLimit = 100 | ||
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| var _ auth.Cache = (*policiesCache)(nil) | ||
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| type policiesCache struct { | ||
| client *redis.Client | ||
| keyDuration time.Duration | ||
| } | ||
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| // NewPoliciesCache returns redis auth cache implementation. | ||
| func NewPoliciesCache(client *redis.Client, duration time.Duration) auth.Cache { | ||
| return &policiesCache{ | ||
| client: client, | ||
| keyDuration: duration, | ||
| } | ||
| } | ||
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| func (pc *policiesCache) Save(ctx context.Context, key, value string) error { | ||
| if err := pc.client.Set(ctx, key, value, pc.keyDuration).Err(); err != nil { | ||
| return errors.Wrap(repoerr.ErrCreateEntity, err) | ||
| } | ||
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| return nil | ||
| } | ||
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| func (pc *policiesCache) Contains(ctx context.Context, key, value string) bool { | ||
| rval, err := pc.client.Get(ctx, key).Result() | ||
| if err != nil { | ||
| return false | ||
| } | ||
| if rval == value { | ||
| return true | ||
| } | ||
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| return false | ||
| } | ||
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| func (pc *policiesCache) Remove(ctx context.Context, key string) error { | ||
| if strings.Contains(key, "*") { | ||
| return pc.delete(ctx, key) | ||
| } | ||
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| if err := pc.client.Del(ctx, key).Err(); err != nil { | ||
| return errors.Wrap(repoerr.ErrRemoveEntity, err) | ||
| } | ||
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| return nil | ||
| } | ||
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| func (pc *policiesCache) delete(ctx context.Context, key string) error { | ||
| keys, cursor, err := pc.client.Scan(ctx, 0, key, defLimit).Result() | ||
| if err != nil { | ||
| return errors.Wrap(repoerr.ErrRemoveEntity, err) | ||
| } | ||
| for cursor != 0 { | ||
| var newKeys []string | ||
| newKeys, cursor, err = pc.client.Scan(ctx, cursor, key, defLimit).Result() | ||
| if err != nil { | ||
| return errors.Wrap(repoerr.ErrRemoveEntity, err) | ||
| } | ||
| keys = append(keys, newKeys...) | ||
| } | ||
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| for _, key := range keys { | ||
| if err := pc.client.Del(ctx, key).Err(); err != nil { | ||
| return errors.Wrap(repoerr.ErrRemoveEntity, err) | ||
| } | ||
| } | ||
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| return nil | ||
| } |
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