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remoteaddr.go
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remoteaddr.go
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// Licensed to Elasticsearch B.V. under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Elasticsearch B.V. licenses this file to you 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 apmhttputil
import (
"net/http"
"strconv"
)
// RemoteAddr returns the remote (peer) socket address for req,
// a server HTTP request.
func RemoteAddr(req *http.Request) string {
remoteAddr, _ := splitHost(req.RemoteAddr)
return remoteAddr
}
// DestinationAddr returns the destination server address and port
// for req, a client HTTP request.
//
// If req.URL.Host contains a port it will be returned, and otherwise
// the default port according to req.URL.Scheme will be returned. If
// the included port is not a valid integer, or no port is included
// and the scheme is unknown, the returned port value will be zero.
func DestinationAddr(req *http.Request) (string, int) {
host, strport := splitHost(req.URL.Host)
var port int
if strport != "" {
port, _ = strconv.Atoi(strport)
} else {
port = SchemeDefaultPort(req.URL.Scheme)
}
return host, port
}
// SchemeDefaultPort returns the default port for the given URI scheme,
// if known, or 0 otherwise.
func SchemeDefaultPort(scheme string) int {
switch scheme {
case "http":
return 80
case "https":
return 443
}
return 0
}