Refactored both main functions into own file
This commit is contained in:
Philipp Böhm
parent
a018e2d33d
commit
86f922a472
3 changed files with 172 additions and 153 deletions
54
backend.go
Normal file
54
backend.go
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@ -0,0 +1,54 @@
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package main
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import (
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"bufio"
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"fmt"
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"github.com/pboehm/ddns/connection"
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"os"
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"strings"
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)
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func RunBackend(conn *connection.RedisConnection) {
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fmt.Printf("OK\tDDNS Go Backend\n")
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bio := bufio.NewReader(os.Stdin)
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for {
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line, _, err := bio.ReadLine()
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HandleErr(err)
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parts := strings.Split(string(line), "\t")
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if len(parts) == 6 {
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query_name := parts[1]
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// get the host part of the fqdn
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// pi.d.example.org -> pi
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hostname := ""
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if strings.HasSuffix(query_name, DdnsDomain) {
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hostname = query_name[:len(query_name)-len(DdnsDomain)]
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}
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query_class := parts[2]
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// query_type := parts[3]
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query_id := parts[4]
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if hostname != "" {
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// check for existance and create response
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if conn.HostExist(hostname) {
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host := conn.GetHost(hostname)
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record := "A"
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if !host.IsIPv4() {
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record = "AAAA"
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}
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fmt.Printf("DATA\t%s\t%s\t%s\t10\t%s\t%s\n",
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query_name, query_class, record, query_id, host.Ip)
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}
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}
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}
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fmt.Printf("END\n")
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}
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}
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171
ddns.go
171
ddns.go
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@ -1,164 +1,25 @@
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"github.com/gin-gonic/gin"
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"github.com/pboehm/ddns/connection"
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"html/template"
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"log"
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"net"
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"net/http"
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"os"
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"strings"
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)
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var DdnsDomain string
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func HandleErr(err error) {
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if err != nil {
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log.Fatal(err)
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}
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}
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func RunBackend() {
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conn := connection.OpenConnection()
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defer conn.Close()
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var (
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DdnsDomain string
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)
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fmt.Printf("OK\tDDNS Go Backend\n")
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bio := bufio.NewReader(os.Stdin)
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for {
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line, _, err := bio.ReadLine()
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HandleErr(err)
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parts := strings.Split(string(line), "\t")
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if len(parts) == 6 {
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query_name := parts[1]
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// get the host part of the fqdn
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// pi.d.example.org -> pi
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hostname := ""
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if strings.HasSuffix(query_name, DdnsDomain) {
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hostname = query_name[:len(query_name)-len(DdnsDomain)]
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}
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query_class := parts[2]
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query_type := parts[3]
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query_id := parts[4]
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if hostname != "" {
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// check for existance and create response
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if conn.HostExist(hostname) {
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host := conn.GetHost(hostname)
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record := "A"
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if !host.IsIPv4() {
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record = "AAAA"
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}
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fmt.Printf("DATA\t%s\t%s\t%s\t10\t%s\t%s\n",
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query_name, query_class, record, query_id, host.Ip)
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}
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}
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}
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fmt.Printf("END\n")
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}
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}
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func RunWebService() {
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conn := connection.OpenConnection()
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defer conn.Close()
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// Add index template from bindata
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index_content, err := Asset("templates/index.html")
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HandleErr(err)
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html, err := template.New("index.html").Parse(string(index_content))
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HandleErr(err)
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r := gin.Default()
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r.HTMLTemplates = html
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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 := c.Params.ByName("hostname")
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c.JSON(200, gin.H{
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"available": !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 := c.Params.ByName("hostname")
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if conn.HostExist(hostname) {
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c.String(403, "This hostname has already been registered.")
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return
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}
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host := &connection.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 := c.Params.ByName("hostname")
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token := c.Params.ByName("token")
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if !conn.HostExist(hostname) {
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c.String(404,
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"This hostname has not been registered or is expired.")
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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.String(403,
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"You have supplied the wrong token to manipulate this host")
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return
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}
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ip, err := GetRemoteAddr(c.Req)
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if err != nil {
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c.String(500, "Your sender IP address is not in the right format")
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}
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host.Ip = ip
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conn.SaveHost(host)
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c.String(200, fmt.Sprintf("Your current IP is %s", ip))
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})
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r.Run(":8080")
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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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func init() {
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flag.StringVar(&DdnsDomain, "domain", "",
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"The subdomain which should be handled by DDNS")
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}
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func ValidateCommandArgs() {
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@ -170,12 +31,7 @@ func ValidateCommandArgs() {
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}
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}
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func init() {
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flag.StringVar(&DdnsDomain, "domain", "",
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"The subdomain which should be handled by DDNS")
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}
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func main() {
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func PrepareForExecution() string {
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flag.Parse()
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ValidateCommandArgs()
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@ -184,13 +40,22 @@ func main() {
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}
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cmd := flag.Args()[0]
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return cmd
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}
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func main() {
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cmd = PrepareForExecution()
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conn := connection.OpenConnection()
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defer conn.Close()
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switch cmd {
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case "backend":
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log.Printf("Starting PDNS Backend\n")
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RunBackend()
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RunBackend(conn)
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case "web":
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log.Printf("Starting Web Service\n")
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RunWebService()
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RunWebService(conn)
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default:
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usage()
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}
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100
web.go
Normal file
100
web.go
Normal file
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@ -0,0 +1,100 @@
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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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"github.com/pboehm/ddns/connection"
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"html/template"
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"net"
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"net/http"
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)
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func RunWebService(conn *connection.RedisConnection) {
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// Add index template from bindata
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index_content, err := Asset("templates/index.html")
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HandleErr(err)
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html, err := template.New("index.html").Parse(string(index_content))
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HandleErr(err)
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r := gin.Default()
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r.HTMLTemplates = html
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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 := c.Params.ByName("hostname")
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c.JSON(200, gin.H{
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"available": !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 := c.Params.ByName("hostname")
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if conn.HostExist(hostname) {
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c.String(403, "This hostname has already been registered.")
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return
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}
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host := &connection.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 := c.Params.ByName("hostname")
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token := c.Params.ByName("token")
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if !conn.HostExist(hostname) {
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c.String(404,
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"This hostname has not been registered or is expired.")
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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.String(403,
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"You have supplied the wrong token to manipulate this host")
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return
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}
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ip, err := GetRemoteAddr(c.Req)
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if err != nil {
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c.String(500, "Your sender IP address is not in the right format")
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}
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host.Ip = ip
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conn.SaveHost(host)
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c.String(200, fmt.Sprintf("Your current IP is %s", ip))
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})
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r.Run(":8080")
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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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