http.go
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package main
import (
"html/template"
"net/http"
"os"
"sync"
"github.com/gin-contrib/multitemplate"
"github.com/gin-gonic/gin"
)
var mu sync.Mutex
var indexPage = template.Must(template.New("index.html").Parse(`
<html>
<head>
<title>System Configuration</title>
<style type="text/css">
div { margin-left: 20px; }
</style>
</head>
<body>
<h1>{{.Device}} Configuration</h1>
<div>
<p>System Version: {{.Version}}</p>
</div>
<hr>
<h1>Setting IP Address</h1>
<div>
<form action="/address" method="post">
<input type="text" name="address" value="{{.IP}}" required />
<input type="text" name="address2" value="{{.IP2}}" required />
<input type="submit" value="Set" />
</form>
</div>
<h1>Updating System</h1>
<div>
<form action="/system" method="post" enctype="multipart/form-data">
<input type="file" name="image" />
<input type="submit" value="Update" />
</form>
</div>
<h1>Updating Application</h1>
<div>
<form action="/application" method="post" enctype="multipart/form-data">
<input type="file" name="image" />
<input type="submit" value="Update" />
</form>
</div>
<h1>Restore System Image</h1>
<div>
<form action="/restore">
<input type="submit" value="Restore" />
</form>
</div>
</body>
</html>
`))
var rebootPage = template.Must(template.New("reboot.html").Parse(`
<html>
<head>
<title>OK</title>
</head>
<body>
<p>{{.Message}}</p>
<form action="/reboot/">
<input type="submit" value="Reboot" />
</form>
</body>
</html>
`))
func runHttp() {
gin.SetMode(gin.ReleaseMode)
g := gin.Default()
r := multitemplate.NewRenderer()
r.Add("index.html", indexPage)
r.Add("reboot.html", rebootPage)
g.HTMLRender = r
g.GET("/", renderIndex)
g.POST("/address", handleAddress)
g.POST("/system", handleSystem)
g.POST("/application", handleApplication)
g.GET("/reboot", handleReboot)
g.GET("/restore", handleRestore)
g.Run(":8988")
}
func handleAddress(c *gin.Context) {
mu.Lock()
defer mu.Unlock()
addr := c.PostForm("address")
addr2 := c.PostForm("address2")
if err := setIpAddress(addr, addr2); err != nil {
c.String(http.StatusBadRequest, "address: setIpAddress: %s", err.Error())
return
}
c.HTML(http.StatusOK, "reboot.html", gin.H{"Message": "IP address is updated."})
}
func handleSystem(c *gin.Context) {
mu.Lock()
defer mu.Unlock()
if err := saveFormFile(c, "image", "/tmp/system.zip"); err != nil {
c.String(http.StatusBadRequest, "system: saveFormFile: %s", err.Error())
return
}
if err := updateSystem(); err != nil {
c.String(http.StatusBadRequest, "system: updateSystem: %s", err.Error())
return
}
c.HTML(http.StatusOK, "reboot.html", gin.H{"Message": "System is updated."})
}
func handleApplication(c *gin.Context) {
mu.Lock()
defer mu.Unlock()
if err := saveFormFile(c, "image", "/tmp/application.zip"); err != nil {
c.String(http.StatusBadRequest, "application: saveFormFile: %s", err.Error())
return
}
if err := updateApp(); err != nil {
c.String(http.StatusBadRequest, "application: updateApplication: %s", err.Error())
return
}
c.HTML(http.StatusOK, "reboot.html", gin.H{"Message": "Application is updated."})
}
func handleReboot(c *gin.Context) {
reboot()
c.String(http.StatusOK, "OK")
}
func handleRestore(c *gin.Context) {
mu.Lock()
defer mu.Unlock()
restore()
c.HTML(http.StatusOK, "reboot.html", gin.H{"Message": "Restoration is done."})
}
func renderIndex(c *gin.Context) {
device := "System"
if len(os.Args) > 1 {
device = os.Args[1]
}
c.HTML(http.StatusOK, "index.html", gin.H{
"Device": device,
"IP": getIpAddress(),
"IP2": getIpAddress2(),
"Version": getVersion(),
})
}
func saveFormFile(c *gin.Context, name string, dst string) error {
file, err := c.FormFile(name)
if err != nil {
return err
}
return c.SaveUploadedFile(file, dst)
}