mirror of https://github.com/status-im/consul.git
70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
// Copyright 2011 Google Inc. All rights reserved.
|
|
// Use of this source code is governed by the Apache 2.0
|
|
// license that can be found in the LICENSE file.
|
|
|
|
// +build !appengine
|
|
|
|
package internal
|
|
|
|
import (
|
|
"io"
|
|
"log"
|
|
"net/http"
|
|
"net/url"
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
)
|
|
|
|
func Main() {
|
|
MainPath = filepath.Dir(findMainPath())
|
|
installHealthChecker(http.DefaultServeMux)
|
|
|
|
port := "8080"
|
|
if s := os.Getenv("PORT"); s != "" {
|
|
port = s
|
|
}
|
|
|
|
host := ""
|
|
if IsDevAppServer() {
|
|
host = "127.0.0.1"
|
|
}
|
|
if err := http.ListenAndServe(host+":"+port, http.HandlerFunc(handleHTTP)); err != nil {
|
|
log.Fatalf("http.ListenAndServe: %v", err)
|
|
}
|
|
}
|
|
|
|
// Find the path to package main by looking at the root Caller.
|
|
func findMainPath() string {
|
|
pc := make([]uintptr, 100)
|
|
n := runtime.Callers(2, pc)
|
|
frames := runtime.CallersFrames(pc[:n])
|
|
for {
|
|
frame, more := frames.Next()
|
|
// Tests won't have package main, instead they have testing.tRunner
|
|
if frame.Function == "main.main" || frame.Function == "testing.tRunner" {
|
|
return frame.File
|
|
}
|
|
if !more {
|
|
break
|
|
}
|
|
}
|
|
return ""
|
|
}
|
|
|
|
func installHealthChecker(mux *http.ServeMux) {
|
|
// If no health check handler has been installed by this point, add a trivial one.
|
|
const healthPath = "/_ah/health"
|
|
hreq := &http.Request{
|
|
Method: "GET",
|
|
URL: &url.URL{
|
|
Path: healthPath,
|
|
},
|
|
}
|
|
if _, pat := mux.Handler(hreq); pat != healthPath {
|
|
mux.HandleFunc(healthPath, func(w http.ResponseWriter, r *http.Request) {
|
|
io.WriteString(w, "ok")
|
|
})
|
|
}
|
|
}
|