76 lines
1.9 KiB
Go
76 lines
1.9 KiB
Go
package main
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import (
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"fmt"
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"io"
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"log"
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"net/http"
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"os"
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"strings"
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)
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const (
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MethodPurge = "PURGE"
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)
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var (
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varnishList = MakeVarnishList()
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status = "200 Purged"
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)
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// MakeVarnishList reads the list of varnish servers from a file on disk.
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func MakeVarnishList() []string {
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Data, err := os.ReadFile("./varnish")
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if err != nil {
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log.Fatal(err)
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}
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sliceData := strings.Split(string(Data), ",")
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return sliceData
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}
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// PurgeHandler handles PURGE request to broadcast it to all varnish instances.
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func PurgeHandler(w http.ResponseWriter, r *http.Request) {
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url := r.URL.String()
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status := SendToVarnish(url)
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if status != "200 Purged" {
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w.WriteHeader(405)
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}
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io.WriteString(w, status)
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}
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func SendToVarnish(url string) string {
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status = "200 Purged"
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// Take url to ban as argument.
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// Loop over the list of Varnish servers and send PURGE request to each.
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for i := 0; i < len(varnishList); i++ {
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//status = "200 Purged"
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client := &http.Client{}
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domain := strings.Trim(varnishList[i], "\r\n")
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req, err := http.NewRequest(MethodPurge, domain + url, nil)
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if err != nil {
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log.Fatal("NewRequest: %s", err)
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}
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resp, err := client.Do(req)
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if err != nil {
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log.Fatal("Client.do: %s", err)
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}
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//fmt.Printf("Resp: %v\n", resp)
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if resp.StatusCode != 200 {
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status = "405 Not Allowed"
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}
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fmt.Println("Purge URL" + " " + domain + url + " : " + status)
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}
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return status
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}
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// HealthHandler handles healthcheck requests and return 200.
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func HealthHandler(w http.ResponseWriter, r *http.Request) {
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io.WriteString(w, "OK")
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}
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func main() {
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http.HandleFunc("/", PurgeHandler)
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http.HandleFunc("/healthcheck", HealthHandler)
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log.Fatal(http.ListenAndServe(":6081",nil))
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}
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