forked from contiv/vpp
/
utils.go
60 lines (54 loc) · 1.66 KB
/
utils.go
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/*
* // Copyright (c) 2018 Cisco and/or its affiliates.
* //
* // Licensed under the Apache License, Version 2.0 (the "License");
* // you may not use this file except in compliance with the License.
* // You may obtain a copy of the License at:
* //
* // http://www.apache.org/licenses/LICENSE-2.0
* //
* // Unless required by applicable law or agreed to in writing, software
* // distributed under the License is distributed on an "AS IS" BASIS,
* // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* // See the License for the specific language governing permissions and
* // limitations under the License.
*/
package utils
import (
"context"
"encoding/json"
"github.com/unrolled/render"
"io/ioutil"
"net/http"
"os/exec"
"time"
)
const (
defaultNetctlCommandTimeout = 2 * time.Second
)
// HandleNetctlCommand executes the contiv-netctl tool with give arguments and sends the output in the response.
func HandleNetctlCommand(formatter *render.Render) http.HandlerFunc {
return func(w http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
body, err := ioutil.ReadAll(req.Body)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
var args []string
err = json.Unmarshal(body, &args)
if err != nil {
w.WriteHeader(http.StatusInternalServerError)
w.Write([]byte(err.Error()))
return
}
ctx, cancel := context.WithTimeout(context.Background(), defaultNetctlCommandTimeout)
defer cancel()
out, err := exec.CommandContext(ctx, "/contiv-netctl", args...).CombinedOutput()
w.Write(out)
if err != nil {
w.Write([]byte(err.Error()))
}
}
}