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// Copyright 2012-2018 The NATS Authors
// Licensed 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 server
import (
"errors"
"fmt"
"net"
"net/url"
"reflect"
"strconv"
"strings"
"time"
"github.com/nats-io/nkeys"
)
// Use nkeys and the public key.
func genID() string {
kp, _ := nkeys.CreateServer()
pub, _ := kp.PublicKey()
return string(pub)
}
// Ascii numbers 0-9
const (
asciiZero = 48
asciiNine = 57
)
// parseSize expects decimal positive numbers. We
// return -1 to signal error.
func parseSize(d []byte) (n int) {
l := len(d)
if l == 0 {
return -1
}
var (
i int
dec byte
)
// Note: Use `goto` here to avoid for loop in order
// to have the function be inlined.
// See: https://github.com/golang/go/issues/14768
loop:
dec = d[i]
if dec < asciiZero || dec > asciiNine {
return -1
}
n = n*10 + (int(dec) - asciiZero)
i++
if i < l {
goto loop
}
return n
}
// parseInt64 expects decimal positive numbers. We
// return -1 to signal error
func parseInt64(d []byte) (n int64) {
if len(d) == 0 {
return -1
}
for _, dec := range d {
if dec < asciiZero || dec > asciiNine {
return -1
}
n = n*10 + (int64(dec) - asciiZero)
}
return n
}
// Helper to move from float seconds to time.Duration
func secondsToDuration(seconds float64) time.Duration {
ttl := seconds * float64(time.Second)
return time.Duration(ttl)
}
// Parse a host/port string with a default port to use
// if none (or 0 or -1) is specified in `hostPort` string.
func parseHostPort(hostPort string, defaultPort int) (host string, port int, err error) {
if hostPort != "" {
host, sPort, err := net.SplitHostPort(hostPort)
switch err.(type) {
case *net.AddrError:
// try appending the current port
host, sPort, err = net.SplitHostPort(fmt.Sprintf("%s:%d", hostPort, defaultPort))
}
if err != nil {
return "", -1, err
}
port, err = strconv.Atoi(strings.TrimSpace(sPort))
if err != nil {
return "", -1, err
}
if port == 0 || port == -1 {
port = defaultPort
}
return strings.TrimSpace(host), port, nil
}
return "", -1, errors.New("No hostport specified")
}
// Returns true if URL u1 represents the same URL than u2,
// false otherwise.
func urlsAreEqual(u1, u2 *url.URL) bool {
return reflect.DeepEqual(u1, u2)
}
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