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update host file

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master
兔子 3 weeks ago
parent 42ad19e798
commit 4190d59159
3 changed files with 425 additions and 149 deletions
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521
hosts/hosts.go
Unescape Escape View File

@ -1,213 +1,442 @@
package hosts
import (
"bytes"
"io/ioutil"
"bufio"
"fmt"
"io"
"net"
"os"
"runtime"
"strings"
"sync"
"b612.me/staros/sysconf"
)
var hostsPath string
var hostsCfg *sysconf.SysConf
var haveError error
var lock sync.Mutex
var reverse bool = false
func init() {
func SystemHostpath() string {
if runtime.GOOS == "windows" {
hostsPath = `C:\Windows\System32\drivers\etc\hosts`
} else {
hostsPath = `/etc/hosts`
return `C:\Windows\System32\drivers\etc\hosts`
}
return `/etc/hosts`
}
func SetHostsPath(path string) {
hostsPath = path
type HostNode struct {
uid uint64
nextuid uint64
lastuid uint64
IP string
Host []string
Comment string
Original string
OnlyComment bool
Valid bool
}
func GetHostsPath() string {
return hostsPath
type Host struct {
idx uint64
hostPath string
nextUid uint64
lastUid uint64
fulldata map[uint64]*HostNode
hostData map[string][]*HostNode
ipData map[string][]*HostNode
sync.RWMutex
}
func Parse() error {
hostsCfg = new(sysconf.SysConf)
hostsCfg.EqualFlag = ` `
hostsCfg.HaveSegMent = false
hostsCfg.CommentCR = true
hostsCfg.CommentFlag = []string{"#"}
data, haveError := ioutil.ReadFile(hostsPath)
if haveError != nil {
return haveError
func NewHosts() *Host {
return &Host{
hostData: make(map[string][]*HostNode),
ipData: make(map[string][]*HostNode),
fulldata: make(map[uint64]*HostNode),
}
data = bytes.ReplaceAll(data, []byte(` `), []byte(" "))
haveError = hostsCfg.Parse(data)
return haveError
}
func GetIpByDomain(domainName string) []string {
if haveError != nil {
return []string{}
func (h *Host) Parse(hostPath string) error {
h.Lock()
defer h.Unlock()
h.hostPath = hostPath
h.fulldata = make(map[uint64]*HostNode)
h.hostData = make(map[string][]*HostNode)
h.ipData = make(map[string][]*HostNode)
return h.parse()
}
func (h *Host) parse() error {
f, err := os.OpenFile(h.hostPath, os.O_RDONLY, 0666)
if err != nil {
return fmt.Errorf("open hosts file %s error: %s", h.hostPath, err)
}
lock.Lock()
defer lock.Unlock()
if !reverse {
hostsCfg.Reverse()
reverse = !reverse
defer f.Close()
buf := bufio.NewReader(f)
for {
line, err := buf.ReadString('\n')
if err == io.EOF {
if h.idx-1 >= 0 {
h.fulldata[h.idx].nextuid = 0
h.lastUid = h.idx
}
break
}
if err != nil {
return fmt.Errorf("read hosts file error: %s", err)
}
h.idx++
line = strings.TrimSpace(line)
data, _ := h.parseLine(line)
data.uid = h.idx
data.lastuid = h.idx - 1
data.nextuid = h.idx + 1
h.fulldata[data.uid] = &data
if h.nextUid == 0 {
h.nextUid = h.idx
}
if data.Valid {
for _, v := range data.Host {
h.hostData[v] = append(h.hostData[v], &data)
}
h.ipData[data.IP] = append(h.ipData[data.IP], &data)
}
}
return hostsCfg.Data[0].GetAll(domainName)
return nil
}
func GetDomainByIp(IpAddr string) []string {
if haveError != nil {
return []string{}
func (h *Host) parseLine(data string) (HostNode, error) {
var res = HostNode{
Original: data,
}
if len(data) == 0 {
return res, fmt.Errorf("empty line")
}
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Reverse()
reverse = !reverse
if data[0] == '#' {
res.Comment = data
res.OnlyComment = true
return res, nil
}
var dataArr []string
cache := ""
for k, v := range data {
if v == '#' {
if len(cache) > 0 {
dataArr = append(dataArr, cache)
cache = ""
}
dataArr = append(dataArr, data[k:])
break
}
if v == ' ' || v == '\t' {
if len(cache) > 0 {
dataArr = append(dataArr, cache)
cache = ""
}
continue
}
cache += string(v)
}
return hostsCfg.Data[0].GetAll(IpAddr)
if len(cache) > 0 {
dataArr = append(dataArr, cache)
}
if len(dataArr) < 2 {
return res, fmt.Errorf("invalid line")
}
if strings.HasPrefix(dataArr[1], "#") {
return res, fmt.Errorf("invalid line")
}
if net.ParseIP(dataArr[0]) == nil {
return res, fmt.Errorf("invalid ip address")
}
for k, v := range dataArr {
switch k {
case 0:
res.IP = v
default:
if strings.HasPrefix(v, "#") {
res.Comment = v
} else {
res.Host = append(res.Host, v)
}
}
}
res.Valid = true
return res, nil
}
func AddHosts(ip, host string) {
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Data[0].AddValue(host, ip, "")
} else {
hostsCfg.Data[0].AddValue(ip, host, "")
func (h *Host) List() []*HostNode {
h.RLock()
defer h.RUnlock()
var res []*HostNode
nextUid := h.nextUid
for {
if nextUid == 0 {
break
}
res = append(res, h.fulldata[nextUid])
nextUid = h.fulldata[nextUid].nextuid
}
return res
}
func RemoveHost(ip, host string) {
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Data[0].DeleteValue(host, ip)
} else {
hostsCfg.Data[0].DeleteValue(ip, host)
func (h *Host) ListByHost(host string) []*HostNode {
h.RLock()
defer h.RUnlock()
if h.hostData == nil {
return nil
}
return h.hostData[host]
}
func RemoveHostbyIp(ip string) {
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) ListIPsByHost(host string) []string {
h.RLock()
defer h.RUnlock()
if h.hostData == nil {
return nil
}
var res []string
for _, v := range h.hostData[host] {
res = append(res, v.IP)
}
hostsCfg.Data[0].Delete(ip)
return res
}
func RemoveHostbyHost(host string) {
lock.Lock()
defer lock.Unlock()
if !reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) ListFirstIPByHost(host string) string {
h.RLock()
defer h.RUnlock()
if h.hostData == nil {
return ""
}
for _, v := range h.hostData[host] {
return v.IP
}
hostsCfg.Data[0].Delete(host)
return ""
}
// SetHost 设定唯一的Host对应值，一个host对应一个ip，其余的删除
func SetHost(ip, host string) {
lock.Lock()
defer lock.Unlock()
if !reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) ListByIP(ip string) []*HostNode {
h.RLock()
defer h.RUnlock()
if h.ipData == nil {
return nil
}
hostsCfg.Data[0].Set(host, ip, "")
return h.ipData[ip]
}
func (h *Host) ListHostsByIP(ip string) []string {
h.RLock()
return h.listHostsByIP(ip)
}
func SetHostbyIp(ip, host string) {
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) listHostsByIP(ip string) []string {
if h.ipData == nil {
return nil
}
var res []string
for _, v := range h.ipData[ip] {
res = append(res, v.Host...)
}
hostsCfg.Data[0].Set(ip, host, "")
return res
}
func Build() string {
if reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) ListFirstHostByIP(ip string) string {
h.RLock()
defer h.RUnlock()
if h.ipData == nil {
return ""
}
return string(hostsCfg.Build())
for _, v := range h.ipData[ip] {
if len(v.Host) > 0 {
return v.Host[0]
}
}
return ""
}
func Write() error {
lock.Lock()
defer lock.Unlock()
data := []byte(Build())
return ioutil.WriteFile(hostsPath, data, 0644)
func (h *Host) AddHosts(ip string, hosts ...string) error {
return h.addHosts("", ip, hosts...)
}
func GetHostList() []string {
var res []string
lock.Lock()
defer lock.Unlock()
if !reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) AddHostsComment(comment string, ip string, hosts ...string) error {
return h.addHosts(comment, ip, hosts...)
}
func (h *Host) RemoveIPHosts(ip string, hosts ...string) error {
h.Lock()
defer h.Unlock()
if h.ipData == nil {
return fmt.Errorf("hosts data not initialized")
}
for _, v := range hostsCfg.Data[0].NodeData {
if v != nil {
res = append(res, v.Key)
ipInfo := h.ipData[ip]
if len(ipInfo) == 0 {
return nil
}
cntfor:
for _, v := range ipInfo {
for _, host := range hosts {
if len(v.Host) == 1 && v.Host[0] == host {
delete(h.ipData, ip)
if v.lastuid != 0 {
h.fulldata[v.lastuid].nextuid = v.nextuid
} else {
h.nextUid = v.nextuid
}
if v.nextuid != 0 {
h.fulldata[v.nextuid].lastuid = v.lastuid
} else {
h.lastUid = v.lastuid
}
var newHostData []*HostNode
for _, vv := range h.hostData[v.Host[0]] {
if vv.uid != v.uid {
newHostData = append(newHostData, vv)
}
}
h.hostData[host] = newHostData
delete(h.fulldata, v.uid)
v = nil
continue cntfor
}
if len(v.Host) > 1 {
var newHosts []string
for _, vv := range v.Host {
if vv != host {
newHosts = append(newHosts, vv)
}
}
v.Host = newHosts
var newHostData []*HostNode
for _, vv := range h.hostData[host] {
if vv.uid != v.uid {
newHostData = append(newHostData, vv)
}
}
h.hostData[host] = newHostData
}
}
}
return res
return nil
}
func GetIpList() []string {
var res []string
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) RemoveIPs(ips ...string) error {
h.Lock()
defer h.Unlock()
if h.ipData == nil {
return fmt.Errorf("hosts data not initialized")
}
for _, v := range hostsCfg.Data[0].NodeData {
if v != nil {
res = append(res, v.Key)
for _, ip := range ips {
ipInfo := h.ipData[ip]
if len(ipInfo) == 0 {
continue
}
for _, v := range ipInfo {
delete(h.ipData, ip)
delete(h.fulldata, v.uid)
if v.lastuid != 0 {
h.fulldata[v.lastuid].nextuid = v.nextuid
} else {
h.nextUid = v.nextuid
}
if v.nextuid != 0 {
h.fulldata[v.nextuid].lastuid = v.lastuid
} else {
h.lastUid = v.lastuid
}
for _, host := range v.Host {
var newHostData []*HostNode
for _, vv := range h.hostData[host] {
if vv.uid != v.uid {
newHostData = append(newHostData, vv)
}
}
h.hostData[host] = newHostData
}
}
}
return res
return nil
}
func GetAllListbyHost() map[string][]string {
res := make(map[string][]string)
lock.Lock()
defer lock.Unlock()
if !reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) RemoveHosts(hosts ...string) error {
h.Lock()
defer h.Unlock()
if h.hostData == nil {
return fmt.Errorf("hosts data not initialized")
}
for _, v := range hostsCfg.Data[0].NodeData {
if v != nil {
res[v.Key] = v.Value
for _, host := range hosts {
hostInfo := h.hostData[host]
if len(hostInfo) == 0 {
continue
}
delete(h.hostData, host)
for _, v := range hostInfo {
var newHosts []string
for _, vv := range v.Host {
if vv != host {
newHosts = append(newHosts, vv)
}
}
v.Host = newHosts
if len(v.Host) == 0 {
delete(h.ipData, v.IP)
if v.lastuid != 0 {
h.fulldata[v.lastuid].nextuid = v.nextuid
} else {
h.nextUid = v.nextuid
}
if v.nextuid != 0 {
h.fulldata[v.nextuid].lastuid = v.lastuid
} else {
h.lastUid = v.lastuid
}
delete(h.fulldata, v.uid)
}
}
}
return res
return nil
}
func GetAllListbyIp() map[string][]string {
res := make(map[string][]string)
lock.Lock()
defer lock.Unlock()
if reverse {
hostsCfg.Reverse()
reverse = !reverse
func (h *Host) SetIPHosts(ip string, hosts ...string) error {
err := h.RemoveIPs(ip)
if err != nil {
return err
}
for _, v := range hostsCfg.Data[0].NodeData {
if v != nil {
res[v.Key] = v.Value
return h.AddHosts(ip, hosts...)
}
func (h *Host) addHosts(comment string, ip string, hosts ...string) error {
h.Lock()
defer h.Unlock()
if h.hostData == nil {
return fmt.Errorf("hosts data not initialized")
}
ipInfo := h.listHostsByIP(ip)
var needAddHosts []string
for _, v := range hosts {
if !inArray(ipInfo, v) {
needAddHosts = append(needAddHosts, v)
}
}
return res
if len(needAddHosts) == 0 {
return nil
}
hostNode := HostNode{
uid: h.idx + 1,
nextuid: 0,
lastuid: h.lastUid,
IP: ip,
Host: needAddHosts,
Valid: true,
Comment: comment,
}
h.idx++
h.fulldata[h.lastUid].nextuid = h.idx
h.lastUid = h.idx
h.fulldata[h.idx] = &hostNode
h.ipData[ip] = append(h.ipData[ip], &hostNode)
for _, v := range needAddHosts {
h.hostData[v] = append(h.hostData[v], &hostNode)
}
return nil
}
func inArray(arr []string, v string) bool {
for _, vv := range arr {
if v == vv {
return true
}
}
return false
}

31
hosts/hosts_test.go
Unescape Escape View File

@ -6,7 +6,32 @@ import (
)
func Test_Hosts(t *testing.T) {
//RemoveHostbyIp("192.168.222.33")
Parse()
fmt.Println(GetAllListbyIp())
var h = NewHosts()
err := h.Parse("./test_hosts.txt")
if err != nil {
t.Error(err)
}
for _, v := range h.List() {
fmt.Printf("%+v\n", v)
}
fmt.Println(h.nextUid, h.lastUid)
fmt.Println("")
err = h.AddHosts("122.23.12.123", "b612.me", "ok.b612.me")
if err != nil {
t.Error(err)
}
for _, v := range h.List() {
fmt.Printf("%+v\n", v)
}
fmt.Println(h.nextUid, h.lastUid)
fmt.Println("")
err = h.RemoveIPHosts("11.22.33.44", "remove.b612.me", "test.dns.set.b612.me")
if err != nil {
t.Error(err)
}
for _, v := range h.List() {
fmt.Printf("%+v\n", v)
}
fmt.Println(h.nextUid, h.lastUid)
fmt.Println("")
}

22
hosts/test_hosts.txt
Unescape Escape View File

@ -0,0 +1,22 @@
#hosts This file describes a number of hostname-to-address
#mappings for the TCP/IP subsystem. It is mostly
#used at boot time, when no name servers are running.
#On small systems, this file can be used instead of a
#"named" name server.
#Syntax:
#IP-Address Full-Qualifie
#special IPv6 addre
127.0.0.1 localhost
127.0.0.1 b612
#special IPv6 addresses
::1 localhost ipv6-localhost ipv6-loopback
fe00::0 ipv6-localnet
ff00::0 ipv6-mcastprefix
ff02::1 ipv6-allnodes
ff02::2 ipv6-allrouters
ff02::3 ipv6-allhosts
1.2.3.4 ssh.b612.me
4.5.6.7 dns.b612.me
8.9.10.11 release-ftpd
11.22.33.44 test.dns.set.b612.me remove.b612.me
4.5.6.7 game.b612.me
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