/
sequence.go
81 lines (64 loc) · 2.29 KB
/
sequence.go
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// Copyright (C) 2020-2021, IrineSistiana
//
// This file is part of mosdns.
//
// mosdns is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// mosdns is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package sequence
import (
"context"
"fmt"
"github.com/IrineSistiana/mosdns/dispatcher/handler"
"github.com/IrineSistiana/mosdns/dispatcher/pkg/executable_seq"
)
const PluginType = "sequence"
func init() {
handler.RegInitFunc(PluginType, Init, func() interface{} { return new(Args) })
handler.MustRegPlugin(&noop{BP: handler.NewBP("_end", PluginType)}, true)
}
var _ handler.ExecutablePlugin = (*sequenceRouter)(nil)
type sequenceRouter struct {
*handler.BP
ecs *executable_seq.ExecutableCmdSequence
}
type Args struct {
Exec []interface{} `yaml:"exec"`
}
func Init(bp *handler.BP, args interface{}) (p handler.Plugin, err error) {
return newSequencePlugin(bp, args.(*Args))
}
func newSequencePlugin(bp *handler.BP, args *Args) (*sequenceRouter, error) {
ecs, err := executable_seq.ParseExecutableCmdSequence(args.Exec)
if err != nil {
return nil, fmt.Errorf("invalid exec squence: %w", err)
}
return &sequenceRouter{
BP: bp,
ecs: ecs,
}, nil
}
func (s *sequenceRouter) Exec(ctx context.Context, qCtx *handler.Context) (err error) {
_, err = s.ecs.ExecCmd(ctx, qCtx, s.L())
return err
}
var _ handler.ExecutablePlugin = (*noop)(nil)
var _ handler.ESExecutablePlugin = (*noop)(nil)
// noop is a no-op handler.Executable and handler.ESExecutable.
// It can be used as a stop sign in the handler.ExecutableCmd.
type noop struct {
*handler.BP
}
func (n *noop) ExecES(_ context.Context, _ *handler.Context) (earlyStop bool, err error) {
return true, nil
}
func (n *noop) Exec(_ context.Context, _ *handler.Context) (_ error) { return nil }