golang的json结构体转换
https://mholt.github.io/json-to-go/
添加了多用户,基本的功能已经实现,应该只能在ubuntu和debian系统下才能运行,因为我只会用这两个系统
效果如下
知识点有点杂,我都不知道怎么总结
index.html部分
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<title>VPS云监控 by foxzc</title>
<!-- Bootstrap core CSS -->
<link href="assets/dist/css/bootstrap.min.css" rel="stylesheet">
</head>
<body>
<div class="container themed-container">
<header class="d-flex justify-content-center py-3">
<p class="h2">系统信息</p>
</header>
<table class="table table-sm table-bordered" style="text-align: center;">
<thead>
<tr>
<th scope="col">节点名</th>
<th scope="col">在线时间</th>
<th scope="col">网络 ↓|↑</th>
<th scope="col">流量 ↓|↑</th>
<th scope="col">处理器</th>
<th scope="col">内存</th>
<th scope="col">硬盘</th>
</tr>
</thead>
<tbody id="servers">
<!-- Servers here \o/ -->
</tbody>
</table>
</article>
</div>
<script src="assets/dist/js/bootstrap.bundle.min.js"></script>
<script src="assets/dist/js/jquery-3.6.0.min.js"></script>
<script src="assets/dist/js/loli.js"></script>
</body>
</html>
js部分
$(function (){
firstajax();
function firstajax(){
$.get('/ajax',function(data,status){
if (status == 'success') {
$("#servers tr").remove();
for (var i = 0 ; i < data.servers.length; i++) {
$("#servers").append(`<tr id="r`+i+`" data-bs-toggle="collapse" data-bs-target="#tr`+i+`" aria-expanded="true">
<th id="name">Name</th>
<td id="day">0天</td>
<td id="net">1K | 1K</td>
<td id="speed">1G | 1G</td>
<td><div class="progress">
<div class="progress-bar bg-success" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" id="cpu">0%</div></div></td>
<td><div class="progress">
<div class="progress-bar bg-success" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" id="mem">0%</div></div></td>
<td><div class="progress">
<div class="progress-bar bg-success" role="progressbar" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100" id="disk">0%</div></div></td>
</tr>
<tr>
<td colspan="16"><div id="tr`+i+`" class="collapse">
显示额外信息
</div></td>
</tr>`)
}
for (var i = 0; i < data.servers.length; i++) {
cpuclass = data.servers[i].Cpuused+"%"
memclass = data.servers[i].Memused+"%"
diskclass = data.servers[i].Diskused+"%"
$('#r'+i+' #name').text(data.servers[i].Name)
$('#r'+i+' #cpu').css("width",cpuclass)
$('#r'+i+' #cpu').text(data.servers[i].Cpuused+"%")
$('#r'+i+' #mem').css("width",memclass)
$('#r'+i+' #mem').text(data.servers[i].Memused+"%")
$('#r'+i+' #disk').css("width",diskclass)
$('#r'+i+' #disk').text(data.servers[i].Diskused+"%")
$('#r'+i+' #net').text(data.servers[i].Netsend+"G | "+data.servers[i].Netrecv+"G")
$('#r'+i+' #speed').text(data.servers[i].Netdown+" | "+data.servers[i].Netup)
$('#r'+i+' #day').text(data.servers[i].Uptime+"天")
$('#tr'+i).text("硬盘: "+data.servers[i].Diskfree+"G/"+ data.servers[i].Disktotal+'G | 内存: '+data.servers[i].Memavailable+"G/"+ data.servers[i].Memtotal+"G | Swap: "+data.servers[i].Swapfree+"G/"+data.servers[i].Swaptotal+"G")
}
}
});
};
setInterval(myajax, 2000);
function myajax(){
$.get('/ajax',function(data,status){
if (status == 'success') {
for (var i = 0; i < data.servers.length; i++) {
cpuclass = data.servers[i].Cpuused+"%"
memclass = data.servers[i].Memused+"%"
diskclass = data.servers[i].Diskused+"%"
$('#r'+i+' #name').text(data.servers[i].Name)
$('#r'+i+' #cpu').css("width",cpuclass)
$('#r'+i+' #cpu').text(data.servers[i].Cpuused+"%")
$('#r'+i+' #mem').css("width",memclass)
$('#r'+i+' #mem').text(data.servers[i].Memused+"%")
$('#r'+i+' #disk').css("width",diskclass)
$('#r'+i+' #disk').text(data.servers[i].Diskused+"%")
$('#r'+i+' #net').text(data.servers[i].Netsend+"G | "+data.servers[i].Netrecv+"G")
$('#r'+i+' #speed').text(data.servers[i].Netdown+" | "+data.servers[i].Netup)
$('#r'+i+' #day').text(data.servers[i].Uptime+"天")
$('#tr'+i).text("硬盘: "+data.servers[i].Diskfree+"G/"+ data.servers[i].Disktotal+'G | 内存: '+data.servers[i].Memavailable+"G/"+ data.servers[i].Memtotal+"G | Swap: "+data.servers[i].Swapfree+"G/"+data.servers[i].Swaptotal+"G")
}
}
});
};
});
服务端部分
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net"
"net/http"
"strings"
"text/template"
)
//定义json配置文件解析后的结构
type ClientJson struct {
Servers []struct {
Username string `json:"username"`
Password string `json:"password"`
Name string `json:"name"`
} `json:"servers"`
}
//定义传出的json配置文件解析后的结构
type Clients struct {
Servers []Server`json:"servers"`
}
type Server struct {
Name string
Cpuused int `json:"Cpuused"`
Memused int `json:"Memused"`
Memavailable float64 `json:"Memavailable"`
Swaptotal float64 `json:"Swaptotal"`
Swapfree float64 `json:"Swapfree"`
Memtotal float64 `json:"Memtotal"`
Disktotal float64 `json:"Disktotal"`
Diskfree float64 `json:"Diskfree"`
Diskused int `json:"Diskused"`
Netsend float64 `json:"Netsend"`
Netrecv float64 `json:"Netrecv"`
Netup string `json:"Netup"`
Netdown string `json:"Netdown"`
Uptime int `json:"Uptime"`
}
func index(w http.ResponseWriter, r *http.Request) {
t, _ := template.ParseFiles("index.html") //找模板
t.Execute(w, nil) //执行模板
}
func ajax(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-type", "application/json;charset=utf-8")
}
func main() {
clientjson := ClientJson{}
clients :=Clients{}
//下面使用的是相对路径,config.json文件和main.go文件处于同一目录下
Readjson("./config.json", &clientjson)
clients.Servers=make([]Server,len(clientjson.Servers))//读取了配置文件,配置文件里有几个用户就make几个
Setname(clientjson,clients.Servers)
go startserver(clientjson,clients)//开个协程,要不然会跟http的监听有冲突
http.Handle("/assets/", http.StripPrefix("/assets/", http.FileServer(http.Dir("assets"))))
http.HandleFunc("/", index) //函数也是一种变量
http.HandleFunc("/ajax", func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-type", "application/json;charset=utf-8")
d,_:=json.Marshal(clients)
fmt.Fprintln(w,string(d))
}) //函数也是一种变量
http.ListenAndServe(":8082", nil)
}
func startserver(clientjson ClientJson,clients Clients){
addr, _ := net.ResolveTCPAddr("tcp4", "0.0.0.0:8899")
lis, _ := net.ListenTCP("tcp4", addr)
fmt.Println("服务器已启动")
for {//通过gorountine,每个客户端分配一个独立协程。
conn, _ := lis.Accept()
go handleConn(conn,clientjson,clients)
}
fmt.Println("服务器结束")
}
func handleConn(conn net.Conn,clientjson ClientJson,clients Clients){
defer conn.Close()
b := make([]byte, 256)
count, err := conn.Read(b)//接收第一个传过来的账号和密码
if err != nil {//这里判断一下err,如果断开就跳出循环,关闭当前连接
fmt.Println("客户端断开连接")
return
}
arr := strings.Split(string(b[:count]),":")//验证账号和密码
isbool,k:=Confirm(arr[0],arr[1],clientjson,clients)
if !isbool{
fmt.Println("用户名或者密码错误!")
return
}
for{//验证通过了,就一直保持连接接收信息
count, err := conn.Read(b)
if err != nil {//这里判断一下err,如果断开就跳出循环,关闭当前连接
fmt.Println(arr[0]+"客户端断开连接")
break
}
err=json.Unmarshal(b[:count],&clients.Servers[k])
if err != nil {//这里判断一下err,如果断开就跳出循环,关闭当前连接
fmt.Println(err.Error())
break
}
}
}
func Readjson(filename string, v interface{}) {
//ReadFile函数会读取文件的全部内容,并将结果以[]byte类型返回
data, err := ioutil.ReadFile(filename)
if err != nil {
return
}
//读取的数据为json格式,需要进行解码
err = json.Unmarshal(data, v)
if err != nil {
return
}
}
func Confirm(u string,pd string,clientjson ClientJson,clients Clients) (bool,int){
for k,v := range clientjson.Servers {
if v.Username == u && v.Password == pd{
fmt.Println(v.Username+"登录成功!")
clients.Servers[k].Name=v.Name
return true,k
}
}
return false,0
}
func Setname(clientjson ClientJson,clients []Server){
for k, v := range clientjson.Servers {
clients[k].Name=v.Name
}
}
客户端部分
package main
import (
"encoding/json"
"fmt"
net2 "net"
"strconv"
"strings"
"time"
"os"
"github.com/shirou/gopsutil/cpu"
"github.com/shirou/gopsutil/disk"
"github.com/shirou/gopsutil/host"
"github.com/shirou/gopsutil/mem"
"github.com/shirou/gopsutil/net"
)
type Sys struct {
Cpuused int
Memused int
Memavailable float64
Swaptotal float64
Swapfree float64
Memtotal float64
Disktotal float64
Diskfree float64
Diskused int
Netsend float64
Netrecv float64
Netup string
Netdown string
Uptime int
}
func main() {
username:=os.Args[1]
pwd:=os.Args[2]
addr:= os.Args[3]
if username=="" || pwd=="" || addr=="" {
fmt.Println("输入的参数有误!例如: ./main username password 127.0.0.1:8899")
}
//服务器端ip和端口
conn, err := net2.Dial("tcp4", addr)
if err != nil {
fmt.Println(err.Error())
}
//向服务端发送数据
s := Sys{}
c := make(chan []byte, 2) //设置2个缓存,这样取了一个就会马上放进去一个
go func() {
for {
s = getstatus()
d, _ := json.Marshal(s)
c <- d
}
}()
_, err = conn.Write([]byte(username+":"+pwd)) //发送账号密码
if err != nil { //如果验证不通过就结束程序
fmt.Println(err.Error())
return
}
for {
_, err := conn.Write(<-c)
if err != nil {
fmt.Println(err.Error())
break
}
}
////关闭连接
defer conn.Close()
}
func toG(i uint64) float64 {
return float64(i) / 1024 / 1024 / 1024
}
func toKB(i uint64) float64 {
return float64(i) / 1024
}
func toMB(i uint64) float64 {
return float64(i) / 1024 / 1024
}
func Decimal(value float64) float64 {
value, _ = strconv.ParseFloat(fmt.Sprintf("%.2f", value), 64)
return value
}
func getNetSpeed() (string, string) {
// 读取所有网卡网速
Net, _ := net.IOCounters(true)
// 定义网速保存变量
var rx, tx uint64
// 循环网络信息
for _, nv := range Net {
// 去除多余信息
if strings.Contains(nv.Name, "eth") || strings.Contains(nv.Name, "ens") {
// 加上网速信息
rx += nv.BytesRecv
tx += nv.BytesSent
}
}
// 暂停一秒
time.Sleep(time.Second)
// 重新读取网络信息
Net, _ = net.IOCounters(true)
// 网络信息保存变量
var rx2, tx2 uint64
// 循环网络信息
for _, nv := range Net {
// 去除多余信息
if strings.Contains(nv.Name, "eth") || strings.Contains(nv.Name, "ens") {
// 加上网速信息
rx2 += nv.BytesRecv
tx2 += nv.BytesSent
}
}
// 两次相减
if toKB(rx2-rx) > 1024 || toKB(tx2-tx) > 1024 {
down := strconv.FormatFloat(toMB(rx2-rx), 'f', 2, 64) + "MB/S"
up := strconv.FormatFloat(toMB(tx2-tx), 'f', 2, 64) + "MB/S"
return down, up
} else {
down := strconv.FormatFloat(toKB(rx2-rx), 'f', 2, 64) + "KB/S"
up := strconv.FormatFloat(toKB(tx2-tx), 'f', 2, 64) + "KB/S"
return down, up
}
}
func getstatus() Sys {
s := Sys{}
m, _ := mem.VirtualMemory()
c, _ := cpu.Percent(time.Second, false)
d, _ := disk.Usage("/")
n, _ := net.IOCounters(true)
swap, _ := mem.SwapMemory()
s.Netsend = Decimal(toG(n[1].BytesSent))
s.Netrecv = Decimal(toG(n[1].BytesRecv))
s.Diskused = int(d.UsedPercent)
s.Diskfree = Decimal(toG(d.Free))
s.Disktotal = Decimal(toG(d.Total))
s.Memused = int(m.UsedPercent)
s.Memtotal = Decimal(toG(m.Total))
s.Memavailable = Decimal(toG(m.Available))
s.Cpuused = int(c[0])
s.Netdown, s.Netup = getNetSpeed()
s.Uptime = int(getUptime() / 60 / 60 / 24)
s.Swaptotal = Decimal(toG(swap.Total))
s.Swapfree = Decimal(toG((swap.Free)))
return s
}
func getUptime() uint64 { //获取的是秒数
up, err := host.BootTime()
if nil != err {
return 0
}
return uint64(time.Now().Unix()) - up
}
服务端这么运行
go run main.go username password 127.0.0.1:8899
代码应该还可以优化一下,比如用结构体的方法什么的,本人新手,完全就是函数堆起来的,感觉很麻烦