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application.go
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application.go
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// Copyright 2015 The Vanadium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Make the Envelope type JSON-codeable.
package application
import (
"encoding/base64"
"encoding/json"
"time"
"v.io/v23/security"
"v.io/v23/verror"
"v.io/v23/vom"
)
const pkgPath = "v.io/v23/services/application"
var (
errCantVOMEncodePublisher = verror.Register(pkgPath+".errCantVOMEncodePublisher", verror.NoRetry, "{1:}{2:} failed to vom-encode Publisher{:_}")
errCantBase64DecodePublisher = verror.Register(pkgPath+".errCantBase64DecodePublisher", verror.NoRetry, "{1:}{2:} failed to base64-decode Publisher{:_}")
errCantVOMDecodePublisher = verror.Register(pkgPath+".errCantVOMDecodePublisher", verror.NoRetry, "{1:}{2:} failed to vom-decode Publisher{:_}")
)
type jsonType struct {
Title string
Args []string
Binary SignedFile
Publisher string // base64-vom-encoded security.Blessings
Env []string
Packages Packages
Restarts int32
RestartTimeWindow time.Duration
}
func (env Envelope) MarshalJSON() ([]byte, error) {
var bytes []byte
if !env.Publisher.IsZero() {
var err error
if bytes, err = vom.Encode(env.Publisher); err != nil {
return nil, verror.New(errCantVOMEncodePublisher, nil, err)
}
}
return json.Marshal(jsonType{
Title: env.Title,
Args: env.Args,
Binary: env.Binary,
Publisher: base64.URLEncoding.EncodeToString(bytes),
Env: env.Env,
Packages: env.Packages,
Restarts: env.Restarts,
RestartTimeWindow: env.RestartTimeWindow,
})
}
func (env *Envelope) UnmarshalJSON(input []byte) error {
var jt jsonType
if err := json.Unmarshal(input, &jt); err != nil {
return err
}
var publisher security.Blessings
if len(jt.Publisher) > 0 {
bytes, err := base64.URLEncoding.DecodeString(jt.Publisher)
if err != nil {
return verror.New(errCantBase64DecodePublisher, nil, err)
}
if err := vom.Decode(bytes, &publisher); err != nil {
return verror.New(errCantVOMDecodePublisher, nil, err)
}
}
env.Title = jt.Title
env.Args = jt.Args
env.Binary = jt.Binary
env.Publisher = publisher
env.Env = jt.Env
env.Packages = jt.Packages
env.Restarts = jt.Restarts
env.RestartTimeWindow = jt.RestartTimeWindow
return nil
}