first commit

This commit is contained in:
wangjian 2023-02-28 09:56:20 +08:00
commit e6be1c8f28
11 changed files with 859 additions and 0 deletions

133
config/cmd/server.go Normal file
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package cmd
import (
"environmentCaptureAgent/config"
"environmentCaptureAgent/internal/monitor"
"fmt"
"git.hpds.cc/pavement/hpds_node"
"go.uber.org/zap"
"os"
"os/signal"
"syscall"
"time"
"git.hpds.cc/Component/logging"
"github.com/spf13/cobra"
)
var (
ConfigFileFlag string = "./config/config.yaml"
logger *logging.Logger
)
func must(err error) {
if err != nil {
fmt.Fprint(os.Stderr, err)
os.Exit(1)
}
}
func NewStartCmd() *cobra.Command {
cmd := &cobra.Command{
Use: "start",
Short: "Start hpds environment capture agent",
Run: func(cmd *cobra.Command, args []string) {
var (
cfg *config.AgentConfig
err error
)
//ctx, cancel := context.WithCancel(context.Background())
//defer cancel()
configFileFlag, err := cmd.Flags().GetString("c")
if err != nil {
fmt.Println("get local config err: ", err)
return
}
must(err)
cfg, err = config.ParseConfigByFile(configFileFlag)
must(err)
logger = LoadLoggerConfig(cfg.Logging)
exitChannel := make(chan os.Signal)
defer close(exitChannel)
// 退出信号监听
go func(c chan os.Signal) {
signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
}(exitChannel)
ap := hpds_node.NewAccessPoint(
cfg.Name,
hpds_node.WithMqAddr(fmt.Sprintf("%s:%d", cfg.Node.Host, cfg.Node.Port)),
hpds_node.WithCredential(cfg.Node.Token),
)
err = ap.Connect()
must(err)
//defer ap.Close()
//for _, v := range cfg.Funcs {
// ap.SetDataTag(v.DataTag)
//}
ap.SetDataTag(18)
node := monitor.GetHost()
byteNode := node.ToByte()
_ = generateAndSendData(ap, byteNode)
ticker := time.NewTicker(time.Duration(cfg.Delay) * time.Second)
count := 0
//c := cron.New()
//spec := fmt.Sprintf("*/%d * * * * *", cfg.Delay)
//_, err = c.AddFunc(spec, func() {
// stat := monitor.GetState().ToByte()
// _ = generateAndSendData(ap, stat)
// logger.With(
// zap.String("agent", "发送状态信息"),
// )
//})
//must(err)
//c.Start()
for {
select {
case <-ticker.C:
stat := monitor.GetState(node.NodeName).ToByte()
go func() {
_ = generateAndSendData(ap, stat)
}()
case errs := <-exitChannel:
count++
if count > 3 {
logger.With(
zap.String("agent", "服务退出"),
).Info(errs.String())
return
}
}
}
},
}
cmd.Flags().StringVar(&ConfigFileFlag, "c", "./config/config.yaml", "The configuration file path")
return cmd
}
func generateAndSendData(stream hpds_node.AccessPoint, data []byte) error {
_, err := stream.Write(data)
if err != nil {
return err
}
time.Sleep(1000 * time.Millisecond)
return nil
}
func LoadLoggerConfig(opt config.LogOptions) *logging.Logger {
return logging.NewLogger(
logging.SetPath(opt.Path),
logging.SetPrefix(opt.Prefix),
logging.SetDevelopment(opt.Development),
logging.SetDebugFileSuffix(opt.DebugFileSuffix),
logging.SetWarnFileSuffix(opt.WarnFileSuffix),
logging.SetErrorFileSuffix(opt.ErrorFileSuffix),
logging.SetInfoFileSuffix(opt.InfoFileSuffix),
logging.SetMaxAge(opt.MaxAge),
logging.SetMaxBackups(opt.MaxBackups),
logging.SetMaxSize(opt.MaxSize),
logging.SetLevel(logging.LogLevel["debug"]),
)
}

62
config/config.go Normal file
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package config
import (
"bytes"
"os"
"github.com/spf13/viper"
)
type AgentConfig struct {
Name string `yaml:"name,omitempty"`
Mode string `yaml:"mode,omitempty"`
Delay int `yaml:"delay"`
Logging LogOptions `yaml:"logging"`
Node HpdsNode `yaml:"node,omitempty"`
Funcs []FuncConfig `yaml:"functions,omitempty"`
}
type FuncConfig struct {
Name string `yaml:"name"`
DataTag uint8 `yaml:"dataTag"`
}
type HpdsNode struct {
Host string `yaml:"host"`
Port int `yaml:"port"`
Token string `yaml:"token,omitempty"`
}
type LogOptions struct {
Path string `yaml:"path" json:"path" toml:"path"` // 文件保存地方
Prefix string `yaml:"prefix" json:"prefix" toml:"prefix"` // 日志文件前缀
ErrorFileSuffix string `yaml:"errorFileSuffix" json:"errorFileSuffix" toml:"errorFileSuffix"` // error日志文件后缀
WarnFileSuffix string `yaml:"warnFileSuffix" json:"warnFileSuffix" toml:"warnFileSuffix"` // warn日志文件后缀
InfoFileSuffix string `yaml:"infoFileSuffix" json:"infoFileSuffix" toml:"infoFileSuffix"` // info日志文件后缀
DebugFileSuffix string `yaml:"debugFileSuffix" json:"debugFileSuffix" toml:"debugFileSuffix"` // debug日志文件后缀
Level string `yaml:"level" json:"level" toml:"level"` // 日志等级
MaxSize int `yaml:"maxSize" json:"maxSize" toml:"maxSize"` // 日志文件大小M
MaxBackups int `yaml:"maxBackups" json:"maxBackups" toml:"maxBackups"` // 最多存在多少个切片文件
MaxAge int `yaml:"maxAge" json:"maxAge" toml:"maxAge"` // 保存的最大天数
Development bool `yaml:"development" json:"development" toml:"development"` // 是否是开发模式
}
func ParseConfigByFile(path string) (cfg *AgentConfig, err error) {
buffer, err := os.ReadFile(path)
if err != nil {
return nil, err
}
return load(buffer)
}
func load(buf []byte) (cfg *AgentConfig, err error) {
cViper := viper.New()
cViper.SetConfigType("yaml")
cfg = new(AgentConfig)
cViper.ReadConfig(bytes.NewBuffer(buf))
err = cViper.Unmarshal(cfg)
if err != nil {
return nil, err
}
return
}

21
config/config.yaml Normal file
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name: capture-agent
mode: dev
delay: 15
node:
host: 114.55.236.153
port: 9188
token: 06d36c6f5705507dae778fdce90d0767
logging:
path: ./logs
prefix: capture-agent
errorFileSuffix: error.log
warnFileSuffix: warn.log
infoFileSuffix: info.log
debugFileSuffix: debug.log
maxSize: 100
maxBackups: 3000
maxAge: 30
development: true
functions:
- name: capture-agent
dataTag: 18

61
go.mod Normal file
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module environmentCaptureAgent
go 1.19
require (
git.hpds.cc/Component/logging v0.0.0-20230106105738-e378e873921b
git.hpds.cc/pavement/hpds_node v0.0.0-20221023053316-37f7ba99eab3
github.com/Erope/goss v0.0.0-20211230093305-df3c03fd1ed4
github.com/robfig/cron/v3 v3.0.1
github.com/shirou/gopsutil/v3 v3.23.1
github.com/spf13/cobra v1.6.1
github.com/spf13/viper v1.15.0
github.com/stretchr/testify v1.8.1
)
require (
git.hpds.cc/Component/mq_coder v0.0.0-20221010064749-174ae7ae3340 // indirect
git.hpds.cc/Component/network v0.0.0-20221012021659-2433c68452d5 // indirect
github.com/davecgh/go-spew v1.1.1 // indirect
github.com/fsnotify/fsnotify v1.6.0 // indirect
github.com/go-ole/go-ole v1.2.6 // indirect
github.com/go-task/slim-sprig v0.0.0-20210107165309-348f09dbbbc0 // indirect
github.com/golang/mock v1.6.0 // indirect
github.com/hashicorp/hcl v1.0.0 // indirect
github.com/inconshreveable/mousetrap v1.0.1 // indirect
github.com/lucas-clemente/quic-go v0.29.1 // indirect
github.com/lufia/plan9stats v0.0.0-20211012122336-39d0f177ccd0 // indirect
github.com/magiconair/properties v1.8.7 // indirect
github.com/marten-seemann/qtls-go1-18 v0.1.2 // indirect
github.com/marten-seemann/qtls-go1-19 v0.1.0 // indirect
github.com/matoous/go-nanoid/v2 v2.0.0 // indirect
github.com/mitchellh/mapstructure v1.5.0 // indirect
github.com/nxadm/tail v1.4.8 // indirect
github.com/onsi/ginkgo v1.16.4 // indirect
github.com/pelletier/go-toml/v2 v2.0.6 // indirect
github.com/pkg/errors v0.9.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/power-devops/perfstat v0.0.0-20210106213030-5aafc221ea8c // indirect
github.com/spf13/afero v1.9.3 // indirect
github.com/spf13/cast v1.5.0 // indirect
github.com/spf13/jwalterweatherman v1.1.0 // indirect
github.com/spf13/pflag v1.0.5 // indirect
github.com/subosito/gotenv v1.4.2 // indirect
github.com/tklauser/go-sysconf v0.3.11 // indirect
github.com/tklauser/numcpus v0.6.0 // indirect
github.com/yusufpapurcu/wmi v1.2.2 // indirect
go.uber.org/atomic v1.9.0 // indirect
go.uber.org/multierr v1.8.0 // indirect
go.uber.org/zap v1.23.0 // indirect
golang.org/x/crypto v0.0.0-20220525230936-793ad666bf5e // indirect
golang.org/x/exp v0.0.0-20220722155223-a9213eeb770e // indirect
golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4 // indirect
golang.org/x/net v0.4.0 // indirect
golang.org/x/sys v0.4.0 // indirect
golang.org/x/text v0.5.0 // indirect
golang.org/x/tools v0.1.12 // indirect
gopkg.in/ini.v1 v1.67.0 // indirect
gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

210
internal/monitor/monitor.go Normal file
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package monitor
import (
"environmentCaptureAgent/model"
"fmt"
"github.com/shirou/gopsutil/v3/disk"
"os/exec"
"regexp"
"runtime"
"strconv"
"strings"
"syscall"
"time"
"github.com/Erope/goss"
"github.com/shirou/gopsutil/v3/cpu"
"github.com/shirou/gopsutil/v3/host"
"github.com/shirou/gopsutil/v3/load"
"github.com/shirou/gopsutil/v3/mem"
"github.com/shirou/gopsutil/v3/net"
"github.com/shirou/gopsutil/v3/process"
)
var (
netInSpeed, netOutSpeed, netInTransfer, netOutTransfer, lastUpdateNetStats uint64
cachedBootTime time.Time
expectDiskFsTypes = []string{
"apfs", "ext4", "ext3", "ext2", "f2fs", "reiserfs", "jfs", "btrfs",
"fuseblk", "zfs", "simfs", "ntfs", "fat32", "exfat", "xfs", "fuse.rclone",
}
getMacDiskNo = regexp.MustCompile(`\/dev\/disk(\d)s.*`)
Version string
)
func GetHost() *model.Node {
hi, _ := host.Info()
var cpuType string
if hi.VirtualizationSystem != "" {
cpuType = "Virtual"
} else {
cpuType = "Physical"
}
cpuModelCount := make(map[string]int)
ci, _ := cpu.Info()
for i := 0; i < len(ci); i++ {
cpuModelCount[ci[i].ModelName]++
}
var cpus []string
for model, count := range cpuModelCount {
cpus = append(cpus, fmt.Sprintf("%s %d %s Core", model, count, cpuType))
}
mv, _ := mem.VirtualMemory()
diskTotal, _ := getDiskTotalAndUsed()
var swapMemTotal uint64
if runtime.GOOS == "windows" {
ms, _ := mem.SwapMemory()
swapMemTotal = ms.Total
} else {
swapMemTotal = mv.SwapTotal
}
if cachedBootTime.IsZero() {
cachedBootTime = time.Unix(int64(hi.BootTime), 0)
}
return &model.Node{
NodeName: hi.HostID,
Platform: hi.OS,
PlatformVersion: hi.PlatformVersion,
CPU: cpus,
MemTotal: mv.Total,
SwapTotal: swapMemTotal,
DiskTotal: diskTotal,
Arch: hi.KernelArch,
Virtualization: hi.VirtualizationSystem,
BootTime: hi.BootTime,
IP: cachedIP,
CountryCode: strings.ToLower(cachedCountry),
Version: Version,
}
}
func GetState(nodeName string) *model.NodeState {
procs, _ := process.Pids()
mv, _ := mem.VirtualMemory()
var swapMemUsed uint64
if runtime.GOOS == "windows" {
// gopsutil 在 Windows 下不能正确取 swap
ms, _ := mem.SwapMemory()
swapMemUsed = ms.Used
} else {
swapMemUsed = mv.SwapTotal - mv.SwapFree
}
var cpuPercent float64
cp, err := cpu.Percent(0, false)
if err == nil {
cpuPercent = cp[0]
}
_, diskUsed := getDiskTotalAndUsed()
loadStat, _ := load.Avg()
var tcpConnCount, udpConnCount uint64
ssErr := true
if runtime.GOOS == "linux" {
tcpStat, errTcp := goss.ConnectionsWithProtocol(syscall.IPPROTO_TCP)
udpStat, errUdp := goss.ConnectionsWithProtocol(syscall.IPPROTO_UDP)
if errTcp == nil && errUdp == nil {
ssErr = false
tcpConnCount = uint64(len(tcpStat))
udpConnCount = uint64(len(udpStat))
}
}
if ssErr {
conns, _ := net.Connections("all")
for i := 0; i < len(conns); i++ {
switch conns[i].Type {
case syscall.SOCK_STREAM:
tcpConnCount++
case syscall.SOCK_DGRAM:
udpConnCount++
}
}
}
return &model.NodeState{
NodeName: nodeName,
CPU: cpuPercent,
MemUsed: mv.Total - mv.Available,
SwapUsed: swapMemUsed,
DiskUsed: diskUsed,
NetInTransfer: netInTransfer,
NetOutTransfer: netOutTransfer,
NetInSpeed: netInSpeed,
NetOutSpeed: netOutSpeed,
Uptime: uint64(time.Since(cachedBootTime).Seconds()),
Load1: loadStat.Load1,
Load5: loadStat.Load5,
Load15: loadStat.Load15,
TcpConnCount: tcpConnCount,
UdpConnCount: udpConnCount,
ProcessCount: uint64(len(procs)),
}
}
func getDiskTotalAndUsed() (total uint64, used uint64) {
diskList, _ := disk.Partitions(false)
devices := make(map[string]string)
countedDiskForMac := make(map[string]struct{})
for _, d := range diskList {
fsType := strings.ToLower(d.Fstype)
// 不统计 K8s 的虚拟挂载点https://github.com/shirou/gopsutil/issues/1007
if devices[d.Device] == "" && isListContainsStr(expectDiskFsTypes, fsType) && !strings.Contains(d.Mountpoint, "/var/lib/kubelet") {
devices[d.Device] = d.Mountpoint
}
}
for device, mountPath := range devices {
diskUsageOf, _ := disk.Usage(mountPath)
// 这里是针对 Mac 机器的处理https://github.com/giampaolo/psutil/issues/1509
matches := getMacDiskNo.FindStringSubmatch(device)
if len(matches) == 2 {
if _, has := countedDiskForMac[matches[1]]; !has {
countedDiskForMac[matches[1]] = struct{}{}
total += diskUsageOf.Total
}
} else {
total += diskUsageOf.Total
}
used += diskUsageOf.Used
}
// Fallback 到这个方法,仅统计根路径,适用于OpenVZ之类的.
if runtime.GOOS == "linux" {
if total == 0 && used == 0 {
cmd := exec.Command("df")
out, err := cmd.CombinedOutput()
if err == nil {
s := strings.Split(string(out), "\n")
for _, c := range s {
info := strings.Fields(c)
if len(info) == 6 {
if info[5] == "/" {
total, _ = strconv.ParseUint(info[1], 0, 64)
used, _ = strconv.ParseUint(info[2], 0, 64)
// 默认获取的是1K块为单位的.
total = total * 1024
used = used * 1024
}
}
}
}
}
}
return
}
func isListContainsStr(list []string, str string) bool {
for i := 0; i < len(list); i++ {
if strings.Contains(str, list[i]) {
return true
}
}
return false
}

90
internal/monitor/myip.go Normal file
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package monitor
import (
"encoding/json"
"environmentCaptureAgent/pkg/utils"
"fmt"
"io/ioutil"
"net/http"
"strings"
"time"
)
type geoIP struct {
CountryCode string `json:"country_code,omitempty"`
IP string `json:"ip,omitempty"`
Query string `json:"query,omitempty"`
}
var (
geoIPApiList = []string{
"https://api.ip.sb/geoip",
"https://ip.seeip.org/geoip",
"https://ipapi.co/json",
"https://freegeoip.app/json/",
"http://ip-api.com/json/",
"https://extreme-ip-lookup.com/json/",
}
cachedIP, cachedCountry string
httpClientV4 = utils.NewSingleStackHTTPClient(time.Second*20, time.Second*5, time.Second*10, false)
httpClientV6 = utils.NewSingleStackHTTPClient(time.Second*20, time.Second*5, time.Second*10, true)
)
func UpdateIP() {
for {
ipv4 := fetchGeoIP(geoIPApiList, false)
ipv6 := fetchGeoIP(geoIPApiList, true)
if ipv4.IP == "" && ipv6.IP == "" {
time.Sleep(time.Minute)
continue
}
if ipv4.IP == "" || ipv6.IP == "" {
cachedIP = fmt.Sprintf("%s%s", ipv4.IP, ipv6.IP)
} else {
cachedIP = fmt.Sprintf("%s/%s", ipv4.IP, ipv6.IP)
}
if ipv4.CountryCode != "" {
cachedCountry = ipv4.CountryCode
} else if ipv6.CountryCode != "" {
cachedCountry = ipv6.CountryCode
}
time.Sleep(time.Minute * 30)
}
}
func fetchGeoIP(servers []string, isV6 bool) geoIP {
var ip geoIP
var resp *http.Response
var err error
for i := 0; i < len(servers); i++ {
if isV6 {
resp, err = httpClientV6.Get(servers[i])
} else {
resp, err = httpClientV4.Get(servers[i])
}
if err == nil {
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
continue
}
resp.Body.Close()
err = json.Unmarshal(body, &ip)
if err != nil {
continue
}
if ip.IP == "" && ip.Query != "" {
ip.IP = ip.Query
}
// 没取到 v6 IP
if isV6 && !strings.Contains(ip.IP, ":") {
continue
}
// 没取到 v4 IP
if !isV6 && !strings.Contains(ip.IP, ".") {
continue
}
return ip
}
}
return ip
}

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main.go Normal file
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package main
import (
"environmentCaptureAgent/config/cmd"
"fmt"
"github.com/spf13/cobra"
"os"
)
var (
rootCmd = &cobra.Command{
Use: "hpds_environment_capture_agent",
Long: "hpds_agent is a environment capture agent",
Version: "0.1",
}
)
func init() {
rootCmd.AddCommand(cmd.NewStartCmd())
}
func main() {
if err := rootCmd.Execute(); err != nil {
fmt.Fprint(os.Stderr, err.Error())
os.Exit(1)
}
}

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model/node.go Normal file
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package model
import "encoding/json"
// Node 节点信息
type Node struct {
NodeName string `json:"nodeName"`
Platform string `json:"platform,omitempty"`
PlatformVersion string `json:"platformVersion,omitempty"`
CPU []string `json:"cpu,omitempty"`
MemTotal uint64 `json:"memTotal,omitempty"`
DiskTotal uint64 `json:"diskTotal,omitempty"`
SwapTotal uint64 `json:"swapTotal,omitempty"`
Arch string `json:"arch,omitempty"`
Virtualization string `json:"virtualization,omitempty"`
BootTime uint64 `json:"bootTime,omitempty"`
IP string `json:"ip"`
CountryCode string `json:"countryCode,omitempty"`
Version string `json:"version,omitempty"`
}
func (n Node) ToByte() []byte {
data, err := json.Marshal(n)
if err != nil {
return []byte("")
}
return data
}
// NodeState 节点状态信息
type NodeState struct {
NodeName string `json:"nodeName"`
CPU float64 `json:"cpu,omitempty"`
MemUsed uint64 `json:"memUsed,omitempty"`
SwapUsed uint64 `json:"swapUsed,omitempty"`
DiskUsed uint64 `json:"diskUsed,omitempty"`
NetInTransfer uint64 `json:"netInTransfer,omitempty"`
NetOutTransfer uint64 `json:"netOutTransfer,omitempty"`
NetInSpeed uint64 `json:"netInSpeed,omitempty"`
NetOutSpeed uint64 `json:"netOutSpeed,omitempty"`
Uptime uint64 `json:"uptime,omitempty"`
Load1 float64 `json:"load1,omitempty"`
Load5 float64 `json:"load5,omitempty"`
Load15 float64 `json:"load15,omitempty"`
TcpConnCount uint64 `json:"tcpConnCount,omitempty"`
UdpConnCount uint64 `json:"udpConnCount,omitempty"`
ProcessCount uint64 `json:"processCount,omitempty"`
}
func (ns NodeState) ToByte() []byte {
data, err := json.Marshal(ns)
if err != nil {
return []byte("")
}
return data
}

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pkg/utils/http.go Normal file
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package utils
import (
"context"
"errors"
"net"
"net/http"
"strings"
"time"
)
func NewSingleStackHTTPClient(httpTimeout, dialTimeout, keepAliveTimeout time.Duration, ipv6 bool) *http.Client {
dialer := &net.Dialer{
Timeout: dialTimeout,
KeepAlive: keepAliveTimeout,
}
transport := &http.Transport{
Proxy: http.ProxyFromEnvironment,
ForceAttemptHTTP2: false,
DialContext: func(ctx context.Context, network string, addr string) (net.Conn, error) {
ip, err := resolveIP(addr, ipv6)
if err != nil {
return nil, err
}
return dialer.DialContext(ctx, network, ip)
},
}
return &http.Client{
Transport: transport,
Timeout: httpTimeout,
}
}
func resolveIP(addr string, ipv6 bool) (string, error) {
url := strings.Split(addr, ":")
dnsServers := []string{"[2606:4700:4700::1001]", "[2001:4860:4860::8844]", "[2400:3200::1]", "[2400:3200:baba::1]"}
if !ipv6 {
dnsServers = []string{"1.0.0.1", "8.8.4.4", "223.5.5.5", "223.6.6.6"}
}
res, err := net.LookupIP(url[0])
if err != nil {
for i := 0; i < len(dnsServers); i++ {
r := &net.Resolver{
PreferGo: true,
Dial: func(ctx context.Context, network, address string) (net.Conn, error) {
d := net.Dialer{
Timeout: time.Second * 10,
}
return d.DialContext(ctx, "udp", dnsServers[i]+":53")
},
}
res, err = r.LookupIP(context.Background(), "ip", url[0])
if err == nil {
break
}
}
}
if err != nil {
return "", err
}
var ipv4Resolved, ipv6Resolved bool
for i := 0; i < len(res); i++ {
ip := res[i].String()
if strings.Contains(ip, ".") && !ipv6 {
ipv4Resolved = true
url[0] = ip
break
}
if strings.Contains(ip, ":") && ipv6 {
ipv6Resolved = true
url[0] = "[" + ip + "]"
break
}
}
if ipv6 && !ipv6Resolved {
return "", errors.New("the AAAA record not resolved")
}
if !ipv6 && !ipv4Resolved {
return "", errors.New("the A record not resolved")
}
return strings.Join(url, ":"), nil
}

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pkg/utils/utils.go Normal file
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package utils
import (
"crypto/md5" // #nosec
"encoding/hex"
"math/rand"
"os"
"regexp"
"time"
"unsafe"
)
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
const (
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
letterIdxMax = 63 / letterIdxBits // # of letter indices fitting in 63 bits
)
func RandStringBytesMaskImprSrcUnsafe(n int) string {
var src = rand.NewSource(time.Now().UnixNano())
b := make([]byte, n)
// A src.Int63() generates 63 random bits, enough for letterIdxMax characters!
for i, cache, remain := n-1, src.Int63(), letterIdxMax; i >= 0; {
if remain == 0 {
cache, remain = src.Int63(), letterIdxMax
}
if idx := int(cache & letterIdxMask); idx < len(letterBytes) {
b[i] = letterBytes[idx]
i--
}
cache >>= letterIdxBits
remain--
}
return *(*string)(unsafe.Pointer(&b)) //#nosec
}
func MD5(plantext string) string {
hash := md5.New() // #nosec
hash.Write([]byte(plantext))
return hex.EncodeToString(hash.Sum(nil))
}
func IsWindows() bool {
return os.PathSeparator == '\\' && os.PathListSeparator == ';'
}
var ipv4Re = regexp.MustCompile(`(\d*\.).*(\.\d*)`)
func ipv4Desensitize(ipv4Addr string) string {
return ipv4Re.ReplaceAllString(ipv4Addr, "$1****$2")
}
var ipv6Re = regexp.MustCompile(`(\w*:\w*:).*(:\w*:\w*)`)
func ipv6Desensitize(ipv6Addr string) string {
return ipv6Re.ReplaceAllString(ipv6Addr, "$1****$2")
}
func IPDesensitize(ipAddr string) string {
ipAddr = ipv4Desensitize(ipAddr)
ipAddr = ipv6Desensitize(ipAddr)
return ipAddr
}

41
pkg/utils/utils_test.go Normal file
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@ -0,0 +1,41 @@
package utils
import (
"testing"
"github.com/stretchr/testify/assert"
)
type testSt struct {
input string
output string
}
func TestNotification(t *testing.T) {
cases := []testSt{
{
input: "103.80.236.249/d5ce:d811:cdb8:067a:a873:2076:9521:9d2d",
output: "103.****.249/d5ce:d811:****:9521:9d2d",
},
{
input: "3.80.236.29/d5ce::cdb8:067a:a873:2076:9521:9d2d",
output: "3.****.29/d5ce::****:9521:9d2d",
},
{
input: "3.80.236.29/d5ce::cdb8:067a:a873:2076::9d2d",
output: "3.****.29/d5ce::****::9d2d",
},
{
input: "3.80.236.9/d5ce::cdb8:067a:a873:2076::9d2d",
output: "3.****.9/d5ce::****::9d2d",
},
{
input: "3.80.236.9/d5ce::cdb8:067a:a873:2076::9d2d",
output: "3.****.9/d5ce::****::9d2d",
},
}
for _, c := range cases {
assert.Equal(t, IPDesensitize(c.input), c.output)
}
}