github.com/alibaba/ilogtail/pkg@v0.0.0-20250526110833-c53b480d046c/helper/probe_http.go (about)

     1  // Copyright 2021 iLogtail Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package helper
    16  
    17  import (
    18  	"net/http"
    19  	"os"
    20  	"strconv"
    21  )
    22  
    23  func init() {
    24  	checkAlivePort := os.Getenv("HTTP_PROBE_PORT")
    25  	if len(checkAlivePort) == 0 {
    26  		return
    27  	}
    28  	checkPort, err := strconv.Atoi(checkAlivePort)
    29  	if err != nil {
    30  		return
    31  	}
    32  	server := &http.Server{ //nolint:gosec
    33  		Addr: ":" + strconv.Itoa(checkPort),
    34  	}
    35  	mux := http.NewServeMux()
    36  	mux.Handle("/", &probeHandler{})
    37  	server.Handler = mux
    38  	go func() {
    39  		_ = server.ListenAndServe()
    40  	}()
    41  }
    42  
    43  type probeHandler struct{}
    44  
    45  func (*probeHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
    46  	_, _ = w.Write([]byte("probe called"))
    47  }