Files
tasks/common/nexus/callback_token.go
Alex ShtinandGitHub 8e8f1b0f7c Remove license header from every file (#7689)
## What changed?
<!-- Describe what has changed in this PR -->
Remove license header from every file. Because it is really hard to
follow in this PR here is the summary:
1. License header is removed from all `.go` and `.proto` files
:fireworks::fireworks:🎆.
2. `LICENSE` file in the root directory has only Temporal and Uber
copyrights.
3. 5 other `LICENSE` files added to the packages which have copyrights
different from Temporal and Uber: Datadog, Xargin, "Mat Ryer, Tyler
Bunnell and contributors".
4. `license_file` flag is removed from all code generation tools.
5. `copyright_file` flag is removed from `go:generate mockgen`
directive.
6. All copyright related targets are removed from `Makefile`.
7. Updated Temporal copyright year to 2025 everywhere.

## Why?
<!-- Tell your future self why have you made these changes -->
I double checked with legal department that it is not needed to have
license header in every file. One file per repo is enough. I put all
copyrights to the root `LICENSE` file and removed header from all other
files. Also updated tools and `Makefile`.
2025-05-01 18:50:21 -07:00

75 lines
2.1 KiB
Go

package nexus
import (
"encoding/base64"
"encoding/json"
tokenspb "go.temporal.io/server/api/token/v1"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/proto"
)
const (
// Currently supported token version.
TokenVersion = 1
// Header key for the callback token in StartOperation requests.
CallbackTokenHeader = "Temporal-Callback-Token"
)
// CallbackToken contains an encoded NexusOperationCompletion message.
type CallbackToken struct {
// Token version - currently only [TokenVersion] is supported.
Version int `json:"v"`
// Encoded [tokenspb.NexusOperationCompletion].
Data string `json:"d"`
// More fields and encryption support will come later.
}
type CallbackTokenGenerator struct {
// In the future this will contain more fields such as encryption keys.
}
func NewCallbackTokenGenerator() *CallbackTokenGenerator {
return &CallbackTokenGenerator{}
}
func (g *CallbackTokenGenerator) Tokenize(completion *tokenspb.NexusOperationCompletion) (string, error) {
b, err := proto.Marshal(completion)
if err != nil {
return "", err
}
token := CallbackToken{
Version: TokenVersion,
Data: base64.URLEncoding.EncodeToString(b),
}
b, err = json.Marshal(token)
if err != nil {
return "", err
}
return string(b), nil
}
// DecodeCompletion decodes a callback token unwrapping the contained NexusOperationCompletion proto struct.
func (g *CallbackTokenGenerator) DecodeCompletion(token *CallbackToken) (*tokenspb.NexusOperationCompletion, error) {
plaintext, err := base64.URLEncoding.DecodeString(token.Data)
if err != nil {
return nil, err
}
completion := &tokenspb.NexusOperationCompletion{}
return completion, proto.Unmarshal(plaintext, completion)
}
// DecodeCallbackToken unmarshals the given token applying minimal data verification.
func DecodeCallbackToken(encoded string) (token *CallbackToken, err error) {
err = json.Unmarshal([]byte(encoded), &token)
if err != nil {
return nil, err
}
if token.Version != TokenVersion {
return nil, status.Errorf(codes.InvalidArgument, "unsupported token version: %d", token.Version)
}
return
}