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navigator
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Navigator now support real ip header from upstream.

This commit is contained in:
Yifu Yu 2019-12-14 01:43:57 +08:00
parent be1053921b
commit c090dd60c6
1 changed files with 24 additions and 30 deletions
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52
main.go
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@ -17,6 +17,7 @@ import (
const (
errIPv4Only = "Navigator works for valid IPv4 only :)"
remoteAddrHeader = "X-NAV-REMOTE-IP"
)
type errorMessage struct {
@ -46,6 +47,23 @@ func responseWithJsonError(resp http.ResponseWriter, statusCode int, message str
}
}
func getRemoteIP(req *http.Request) string {
if addr := req.Header.Get(remoteAddrHeader); addr != "" {
if net.ParseIP(addr).To4() == nil {
return ""
}
return addr
}
host, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
return ""
}
if net.ParseIP(host).To4() == nil {
return ""
}
return host
}
func buildLocation(info *ipdb.CityInfo) string {
ret := ""
if info.CountryName != "" {
@ -74,18 +92,13 @@ func main() {
var host string
if argIp := req.FormValue("ip"); argIp != "" {
host = argIp
} else {
ip, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
responseWithError(resp, http.StatusPreconditionFailed, errIPv4Only)
return
}
host = ip
}
if net.ParseIP(host).To4() == nil {
responseWithError(resp, http.StatusPreconditionFailed, errIPv4Only)
return
}
} else {
host = getRemoteIP(req)
}
db := ipgeo.Get()
info_cn, err := db.FindInfo(host, "CN")
@ -120,15 +133,7 @@ func main() {
})
http.HandleFunc("/mapping", func(resp http.ResponseWriter, req *http.Request) {
host, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
responseWithError(resp, http.StatusPreconditionFailed, errIPv4Only)
return
}
if net.ParseIP(host).To4() == nil {
responseWithError(resp, http.StatusPreconditionFailed, errIPv4Only)
return
}
host := getRemoteIP(req)
resp.Header().Set("Content-Type", "text/plain")
resp.WriteHeader(http.StatusOK)
server := mapping.Get(host)
@ -151,15 +156,7 @@ func main() {
clientV1Api := http.NewServeMux()
clientApi.Handle("/v1/", http.StripPrefix("/v1", clientV1Api))
clientV1Api.HandleFunc("/getNodes", func(resp http.ResponseWriter, req *http.Request) {
host, _, err := net.SplitHostPort(req.RemoteAddr)
if err != nil {
responseWithJsonError(resp, http.StatusPreconditionFailed, errIPv4Only)
return
}
if net.ParseIP(host).To4() == nil {
responseWithJsonError(resp, http.StatusPreconditionFailed, errIPv4Only)
return
}
host := getRemoteIP(req)
nodes := mapping.GetNodes()
if nodes == nil {
responseWithJsonError(resp, http.StatusInternalServerError, "Unable to get nodes")
@ -174,9 +171,6 @@ func main() {
"suffix": suffix,
})
})
clientV1Api.HandleFunc("/getSuffix", func(resp http.ResponseWriter, req *http.Request) {
})
log.Println("HTTP server is running on", *listen_spec)
http.ListenAndServe(*listen_spec, nil)
}