126 lines
2.7 KiB
Go
126 lines
2.7 KiB
Go
package main
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import (
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"fmt"
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"github.com/gin-gonic/gin"
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"html/template"
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"net"
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"net/http"
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"regexp"
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)
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func RunWebService(conn *RedisConnection) {
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r := gin.Default()
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r.SetHTMLTemplate(BuildTemplate())
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r.GET("/", func(g *gin.Context) {
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g.HTML(200, "index.html", gin.H{"domain": DdnsDomain})
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})
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r.GET("/available/:hostname", func(c *gin.Context) {
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hostname, valid := ValidHostname(c.Params.ByName("hostname"))
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c.JSON(200, gin.H{
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"available": valid && !conn.HostExist(hostname),
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})
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})
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r.GET("/new/:hostname", func(c *gin.Context) {
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hostname, valid := ValidHostname(c.Params.ByName("hostname"))
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if !valid {
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c.JSON(404, gin.H{"error": "This hostname is not valid"})
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return
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}
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if conn.HostExist(hostname) {
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c.JSON(403, gin.H{
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"error": "This hostname has already been registered.",
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})
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return
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}
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host := &Host{Hostname: hostname, Ip: "127.0.0.1"}
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host.GenerateAndSetToken()
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conn.SaveHost(host)
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c.JSON(200, gin.H{
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"hostname": host.Hostname,
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"token": host.Token,
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"update_link": fmt.Sprintf("/update/%s/%s", host.Hostname, host.Token),
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})
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})
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r.GET("/update/:hostname/:token", func(c *gin.Context) {
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hostname, valid := ValidHostname(c.Params.ByName("hostname"))
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token := c.Params.ByName("token")
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if !valid {
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c.JSON(404, gin.H{"error": "This hostname is not valid"})
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return
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}
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if !conn.HostExist(hostname) {
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c.JSON(404, gin.H{
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"error": "This hostname has not been registered or is expired.",
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})
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return
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}
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host := conn.GetHost(hostname)
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if host.Token != token {
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c.JSON(403, gin.H{
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"error": "You have supplied the wrong token to manipulate this host",
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})
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return
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}
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ip, err := GetRemoteAddr(c.Request)
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if err != nil {
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c.JSON(400, gin.H{
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"error": "Your sender IP address is not in the right format",
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})
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return
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}
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host.Ip = ip
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conn.SaveHost(host)
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c.JSON(200, gin.H{
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"current_ip": ip,
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"status": "Successfuly updated",
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})
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})
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r.Run(DdnsWebListenSocket)
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}
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// Get the Remote Address of the client. At First we try to get the
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// X-Forwarded-For Header which holds the IP if we are behind a proxy,
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// otherwise the RemoteAddr is used
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func GetRemoteAddr(req *http.Request) (string, error) {
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header_data, ok := req.Header["X-Forwarded-For"]
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if ok {
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return header_data[0], nil
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} else {
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ip, _, err := net.SplitHostPort(req.RemoteAddr)
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return ip, err
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}
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}
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// Get index template from bindata
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func BuildTemplate() *template.Template {
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html, err := template.New("index.html").Parse(indexTemplate)
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HandleErr(err)
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return html
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}
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func ValidHostname(host string) (string, bool) {
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valid, _ := regexp.Match("^[a-z0-9]{1,32}$", []byte(host))
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return host, valid
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}
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