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getset.go
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getset.go
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// © 2022 Nokia.
//
// This code is a Contribution to the gNMIc project (“Work”) made under the Google Software Grant and Corporate Contributor License Agreement (“CLA”) and governed by the Apache License 2.0.
// No other rights or licenses in or to any of Nokia’s intellectual property are granted for any other purpose.
// This code is provided on an “as is” basis without any warranties of any kind.
//
// SPDX-License-Identifier: Apache-2.0
package app
import (
"context"
"encoding/json"
"errors"
"fmt"
"github.com/itchyny/gojq"
"github.com/openconfig/gnmi/proto/gnmi"
"github.com/openconfig/grpctunnel/tunnel"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
"github.com/openconfig/gnmic/pkg/api/types"
"github.com/openconfig/gnmic/pkg/config"
"github.com/openconfig/gnmic/pkg/formatters"
)
func (a *App) GetSetPreRunE(cmd *cobra.Command, args []string) error {
a.Config.SetLocalFlagsFromFile(cmd)
a.Config.LocalFlags.GetSetModel = config.SanitizeArrayFlagValue(a.Config.LocalFlags.GetSetModel)
a.createCollectorDialOpts()
return a.initTunnelServer(tunnel.ServerConfig{
AddTargetHandler: a.tunServerAddTargetHandler,
DeleteTargetHandler: a.tunServerDeleteTargetHandler,
RegisterHandler: a.tunServerRegisterHandler,
Handler: a.tunServerHandler,
})
}
func (a *App) GetSetRunE(cmd *cobra.Command, args []string) error {
defer a.InitGetSetFlags(cmd)
if a.Config.Format == formatEvent {
return fmt.Errorf("format event not supported for GetSet RPC")
}
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
// setupCloseHandler(cancel)
targetsConfig, err := a.GetTargets()
if err != nil {
return fmt.Errorf("failed getting targets config: %v", err)
}
if !a.PromptMode {
for _, tc := range targetsConfig {
a.AddTargetConfig(tc)
}
}
req, err := a.Config.CreateGASGetRequest()
if err != nil {
return err
}
numTargets := len(a.Config.Targets)
a.errCh = make(chan error, numTargets*3)
a.wg.Add(numTargets)
for _, tc := range a.Config.Targets {
go a.GetSetRequest(ctx, tc, req)
}
a.wg.Wait()
return a.checkErrors()
}
func (a *App) GetSetRequest(ctx context.Context, tc *types.TargetConfig, req *gnmi.GetRequest) {
defer a.wg.Done()
xreq := req
if len(a.Config.LocalFlags.GetSetModel) > 0 {
spModels, unspModels, err := a.filterModels(ctx, tc, a.Config.LocalFlags.GetSetModel)
if err != nil {
a.logError(fmt.Errorf("failed getting supported models from %q: %v", tc.Name, err))
return
}
if len(unspModels) > 0 {
a.logError(fmt.Errorf("found unsupported models for target %q: %+v", tc.Name, unspModels))
}
for _, m := range spModels {
xreq.UseModels = append(xreq.UseModels, m)
}
}
if a.Config.PrintRequest {
err := a.PrintMsg(tc.Name, "Get Request:", req)
if err != nil {
a.logError(fmt.Errorf("target %q Get Request printing failed: %v", tc.Name, err))
}
}
a.Logger.Printf("sending gNMI GetRequest: prefix='%v', path='%v', type='%v', encoding='%v', models='%+v', extension='%+v' to %s",
xreq.Prefix, xreq.Path, xreq.Type, xreq.Encoding, xreq.UseModels, xreq.Extension, tc.Name)
response, err := a.ClientGet(ctx, tc, xreq)
if err != nil {
a.logError(fmt.Errorf("target %q get request failed: %v", tc.Name, err))
return
}
err = a.PrintMsg(tc.Name, "Get Response:", response)
if err != nil {
a.logError(fmt.Errorf("target %q: %v", tc.Name, err))
}
//
q, err := gojq.Parse(a.Config.LocalFlags.GetSetCondition)
if err != nil {
a.logError(err)
return
}
code, err := gojq.Compile(q)
if err != nil {
a.logError(err)
return
}
mo := formatters.MarshalOptions{Format: "json"}
b, err := mo.Marshal(response, map[string]string{"address": tc.Name})
if err != nil {
a.logError(fmt.Errorf("error marshaling message: %v", err))
return
}
var input interface{}
err = json.Unmarshal(b, &input)
if err != nil {
a.logError(fmt.Errorf("error unmarshaling message: %v", err))
return
}
iter := code.Run(input)
var ok bool
res, ok := iter.Next()
if !ok {
a.logError(fmt.Errorf("unexpected jq result type: %v", res))
// iterator not done, so the final result won't be a boolean
return
}
if err, ok = res.(error); ok {
if err != nil {
a.logError(fmt.Errorf("condition evaluation failed: %v", err))
return
}
}
switch res := res.(type) {
case bool:
a.Logger.Printf("GetSet condition evaluated to %v", res)
if res {
setReq, err := a.Config.CreateGASSetRequest(input)
if err != nil {
a.logError(err)
return
}
if len(setReq.Delete) == 0 && len(setReq.Replace) == 0 && len(setReq.Update) == 0 {
a.Logger.Printf("empty set request")
return
}
a.setRequest(ctx, tc, setReq)
}
return
default:
a.logError(errors.New("unexpected condition return type"))
return
}
}
// InitGetSetFlags used to init or reset getsetCmd flags for gnmic-prompt mode
func (a *App) InitGetSetFlags(cmd *cobra.Command) {
cmd.ResetFlags()
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetGet, "get", "", "", "get request paths")
cmd.MarkFlagRequired("get")
cmd.Flags().StringSliceVarP(&a.Config.LocalFlags.GetSetModel, "model", "", []string{}, "get request models")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetPrefix, "prefix", "", "", "get request prefix")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetType, "type", "t", "ALL", "data type requested from the target. one of: ALL, CONFIG, STATE, OPERATIONAL")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetTarget, "target", "", "", "get request target")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetCondition, "condition", "", "any([true])", "condition to be met in order to execute the set request")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetUpdate, "update", "", "", "set update path template, a Go template or a jq expression")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetReplace, "replace", "", "", "set replace path template, a Go template or a jq expression")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetDelete, "delete", "", "", "set delete path template, a Go template or a jq expression")
cmd.Flags().StringVarP(&a.Config.LocalFlags.GetSetValue, "value", "", "", "set value template, a Go template or a jq expression")
cmd.LocalFlags().VisitAll(func(flag *pflag.Flag) {
a.Config.FileConfig.BindPFlag(fmt.Sprintf("%s-%s", cmd.Name(), flag.Name), flag)
})
}