Initial commit

.gitignore

@@ -0,0 +1,3 @@
+mini-beieli-web
+nohup.out
+database/

README.md

@@ -0,0 +1,7 @@
+# mini-beieli-web - Bienenstock Ueberwachung
+
+Webapplikation, geschrieben in Golang.
+
+Autor: Joerg Lehmann, nbit Informatik GmbH
+
+

authentication.go

@@ -0,0 +1,129 @@
+package main
+
+import (
+	"github.com/gorilla/securecookie"
+	"net/http"
+	"fmt"
+        "crypto/md5"
+        "encoding/hex"
+)
+
+// cookie handling
+
+var cookieHandler = securecookie.New(
+	securecookie.GenerateRandomKey(64),
+	securecookie.GenerateRandomKey(32))
+
+func getUserName(request *http.Request) (userName string) {
+	if cookie, err := request.Cookie("session"); err == nil {
+		cookieValue := make(map[string]string)
+		if err = cookieHandler.Decode("session", cookie.Value, &cookieValue); err == nil {
+			userName = cookieValue["name"]
+		}
+	}
+	return userName
+}
+
+func getUserNameHash(request *http.Request) (userName string) {
+	if cookie, err := request.Cookie("session"); err == nil {
+		cookieValue := make(map[string]string)
+		if err = cookieHandler.Decode("session", cookie.Value, &cookieValue); err == nil {
+			userName = cookieValue["name"]
+		}
+	}
+        hasher := md5.New()
+        hasher.Write([]byte(userName))
+        return hex.EncodeToString(hasher.Sum(nil))
+}
+
+func setSession(userName string, response http.ResponseWriter) {
+	value := map[string]string{
+		"name": userName,
+	}
+	if encoded, err := cookieHandler.Encode("session", value); err == nil {
+		cookie := &http.Cookie{
+			Name:  "session",
+			Value: encoded,
+			Path:  "/",
+		}
+		http.SetCookie(response, cookie)
+	}
+}
+
+func clearSession(response http.ResponseWriter) {
+	cookie := &http.Cookie{
+		Name:   "session",
+		Value:  "",
+		Path:   "/",
+		MaxAge: -1,
+	}
+	http.SetCookie(response, cookie)
+}
+
+// login handler
+
+func loginHandler(response http.ResponseWriter, request *http.Request) {
+	name := request.FormValue("email")
+	pass := request.FormValue("password")
+	redirectTarget := "/invalid_login.html"
+	//if name != "" && pass != "" {
+	if checkLoginCredentials(name,pass) {
+		// .. check credentials ..
+		logit(fmt.Sprintf("loginHandler: successful login for User %s",name))
+		setSession(name, response)
+		updateLoginTime(name)
+		redirectTarget = "/scales.html"
+	} else {
+	  logit(fmt.Sprintf("loginHandler: invalid login for User %s",name))
+        }
+	http.Redirect(response, request, redirectTarget, 302)
+}
+
+
+// resetPassword handler
+
+func resetPasswordHandler(response http.ResponseWriter, request *http.Request) {
+	name := request.FormValue("email")
+	pass := request.FormValue("password")
+	redirectTarget := "/"
+	logit(fmt.Sprintf("resetPasswordHandler: request for User %s",name))
+	if name != "" && pass != "" {
+		if checkUserAvailable(name) {
+	        	http.Redirect(response, request, "/user_does_not_exist.html", 302)
+		} else {
+			updateUser(name,pass)
+	                http.Redirect(response, request, redirectTarget, 302)
+                }
+	}
+	http.Redirect(response, request, "/error_reset_password.html",302)
+}
+
+// setPassword handler
+
+func setPasswordHandler(response http.ResponseWriter, request *http.Request) {
+	name := getUserName(request)
+	pass := request.FormValue("password")
+	if name != "" && pass != "" {
+		if checkUserAvailable(name) {
+	        	http.Redirect(response, request, "/user_does_not_exist.html", 302)
+		} else {
+			updateUser(name,pass)
+                }
+	}
+}
+
+// logout handler
+
+func logoutHandler(response http.ResponseWriter, request *http.Request) {
+	clearSession(response)
+	http.Redirect(response, request, "/", 302)
+}
+
+// confirm handler
+
+func confirmHandler(response http.ResponseWriter, request *http.Request) {
+	confirm_id := request.URL.Query().Get("id")
+	logit(fmt.Sprintf("Confirm ID: %s\n",confirm_id))
+	confirmUser(confirm_id)
+	http.Redirect(response, request, "/", 302)
+}

log.go

@@ -0,0 +1,9 @@
+package main
+
+import (
+	"log"
+)
+
+func logit(log_message string) {
+        log.Println(log_message)
+}

mail.go

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+package main
+
+import (
+	"log"
+	"bytes"
+	"net/smtp"
+)
+
+func sendEmail(username,confirm_id string) {
+    c, err := smtp.Dial("127.0.0.1:25")
+    if err != nil {
+        log.Fatal(err)
+    }
+    defer c.Close()
+    // Set the sender and recipient.
+    c.Mail("register@mini-beieli.ch")
+    c.Rcpt(username)
+    // Send the email body.
+    wc, err := c.Data()
+    if err != nil {
+        log.Fatal(err)
+    }
+    defer wc.Close()
+	mail_message := "To: " + username + `
+Subject: Passwortaenderung auf https://mini-beieli.ch, bitte bestaetigen
+
+Lieber Benutzer von mini-beieli.ch
+
+Sie haben soeben eine Passwortaenderung veranlasst.  Bitte klicken Sie folgenden Link,
+um die Registration abzuschliessen:
+
+https://mini-beieli.ch/confirm?id=` + confirm_id + `
+
+Bitte ignorieren Sie diese Meldung, falls die Aenderung nicht von Ihnen angefordert wurde!
+
+Mit freundlichen Grüssen
+--
+mini-beieli.ch`
+
+    buf := bytes.NewBufferString(mail_message)
+    if _, err = buf.WriteTo(wc); err != nil {
+        log.Fatal(err)
+    }
+}

main.go

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+package main
+
+import (
+	"html/template"
+	"net/http"
+	"os"
+	"path"
+        "time"
+)
+
+type AccountData struct {
+  Full_name  string
+  Phone      string
+  Address    string
+  Zip        string
+  City       string
+}
+
+type Scale struct {
+  Beielipi_id    string
+  Beielipi_alias string
+  Id             string
+  Alias          string
+  My_sms_number  string
+  Sms_alarm      string
+  Last_alarm     string
+}
+
+func serveTemplate(w http.ResponseWriter, r *http.Request) {
+	logit("Called URL: "+r.URL.Path)
+	// wennn kein File angegeben ist: index.html
+	if r.URL.Path == "/" {
+		r.URL.Path = "/index.html"
+	}
+	lp := path.Join("templates", "layout.html")
+	fp := path.Join("snippets", r.URL.Path)
+
+	// Return a 404 if the template doesn't exist
+	_, err := os.Stat(fp)
+	if err != nil {
+		if os.IsNotExist(err) {
+			logit("URL not found: " + fp)
+			fp = path.Join("snippets", "404.html")
+		}
+	}
+
+	tmpl, err := template.ParseFiles(lp, fp)
+	if err != nil {
+		// Log the detailed error
+		logit(err.Error())
+		// Return a generic "Internal Server Error" message
+		http.Error(w, http.StatusText(500), 500)
+		return
+	}
+
+        var userName = getUserName(r)
+
+        t := time.Now()
+        var datetimestring = t.Format("20060102150405")
+        data := struct {
+            UserName  string
+            DateTimeString string
+        } {
+            userName,
+            datetimestring,
+        }
+
+	if err := tmpl.ExecuteTemplate(w, "layout", &data); err != nil {
+		logit(err.Error())
+		http.Error(w, http.StatusText(500), 500)
+	}
+}
+
+func main() {
+        initDB()
+        defer closeDB()
+	fs := http.FileServer(http.Dir("static"))
+	http.Handle("/static/", http.StripPrefix("/static/", fs))
+	http.Handle("/favicon.ico", fs)
+	http.HandleFunc("/", serveTemplate)
+
+        http.HandleFunc("/login", loginHandler)
+        http.HandleFunc("/reset_password", resetPasswordHandler)
+        http.HandleFunc("/set_password", setPasswordHandler)
+        http.HandleFunc("/logout", logoutHandler)
+        http.HandleFunc("/confirm", confirmHandler)
+
+	logit("Starting Web Application...")
+	http.ListenAndServe("127.0.0.1:4000", nil)
+	logit("Terminating Web Application...")
+}

persistence.go

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+package main
+
+import (
+	"time"
+	"encoding/json"
+	"crypto/rand"
+	"golang.org/x/crypto/bcrypt"
+        "github.com/gomodule/redigo/redis"
+)
+
+var globalPool *redis.Pool
+var globalConn redis.Conn
+
+
+const userPrefix string = "user:"
+const confirmPrefix string = "confirm:"
+
+func newPool() *redis.Pool {
+	return &redis.Pool{
+		// Maximum number of idle connections in the pool.
+		MaxIdle: 80,
+		// max number of connections
+		MaxActive: 12000,
+		// Dial is an application supplied function for creating and
+		// configuring a connection.
+		Dial: func() (redis.Conn, error) {
+			c, err := redis.Dial("tcp", ":6379")
+			if err != nil {
+				panic(err.Error())
+			}
+			return c, err
+		},
+	}
+}
+
+// ping tests connectivity for redis (PONG should be returned)
+func ping(c redis.Conn) error {
+	// Send PING command to Redis
+	// PING command returns a Redis "Simple String"
+	// Use redis.String to convert the interface type to string
+	s, err := redis.String(c.Do("PING"))
+	if err != nil {
+		return err
+	}
+
+	logit("PING Response = "+s)
+	// Output: PONG
+
+	return nil
+}
+
+// User is a simple user struct for this example
+type User struct {
+	Email         string `json:"email"`
+	Password      string `json:"password"`
+	NewPassword   string `json:"new_password"`
+	ConfirmId     string `json:"confirm_id"`
+	LastLogin     string `json:"last_login"`
+
+}
+
+func setStruct(c redis.Conn, usr User) error {
+
+	// serialize User object to JSON
+	json, err := json.Marshal(usr)
+	if err != nil {
+		return err
+	}
+
+	// SET object
+	_, err = c.Do("SET", userPrefix+usr.Email, json)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func getStruct(c redis.Conn, username string) (User, error) {
+
+	usr := User{}
+	s, err := redis.String(c.Do("GET", userPrefix+username))
+	if err == redis.ErrNil {
+		logit("User does not exist:"+username)
+	} else if err != nil {
+		return usr, err
+	}
+
+	err = json.Unmarshal([]byte(s), &usr)
+
+	return usr, nil
+
+}
+
+func initDB() {
+
+	// newPool returns a pointer to a redis.Pool
+	pool := newPool()
+	// get a connection from the pool (redis.Conn)
+	conn := pool.Get()
+
+        globalPool = pool
+        globalConn = conn
+
+        // wir machen einen Connection Test
+        ping(globalConn)
+
+        // Wir legen einen initialen Admin User an, falls es diesen noch nicht gibt
+        if checkUserAvailable("joerg.lehmann@nbit.ch") {
+                insertUser("joerg.lehmann@nbit.ch","changeme123","Y");
+        }
+
+}
+
+func closeDB() {
+	globalConn.Close()
+	globalPool.Close()
+}
+
+func checkUserAvailable(username string) bool {
+        logit("checkUserAvailable: User: "+username)
+        _, err := redis.String(globalConn.Do("GET", userPrefix+username))
+	if (err == redis.ErrNil) {
+		logit("User does not exist and is therefore available:"+username)
+                return true
+        } else if err != nil {
+                logit("checkUserAvailable: Error to query Key Value Store")
+                return false
+	}
+	return false
+}
+
+func randString(n int) string {
+    const alphanum = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
+    var bytes = make([]byte, n)
+    rand.Read(bytes)
+    for i, b := range bytes {
+        bytes[i] = alphanum[b % byte(len(alphanum))]
+    }
+    return string(bytes)
+}
+
+func insertUser(username,password,is_admin string) {
+        logit("insertUser: "+username)
+        pwd := []byte(password)
+        hashedPassword,err := bcrypt.GenerateFromPassword(pwd, bcrypt.DefaultCost)
+	if err != nil {
+        	logit("insertUser: Error with bcrypt.GenerateFromPassword, User: "+username)
+		return
+	}
+        confirm_id := ""
+
+	_, err = globalConn.Do("HMSET", userPrefix+username, "password", string(hashedPassword), "new_password", string(hashedPassword), "confirm_id", confirm_id, "last_login", "")
+
+	if err != nil {
+        	logit("insertUser: Error inserting User: "+username)
+		return
+        }
+}
+
+func updateUser(username,password string) {
+        logit("updateUser: "+username)
+        pwd := []byte(password)
+        hashedPassword,err := bcrypt.GenerateFromPassword(pwd, bcrypt.DefaultCost)
+	if err != nil {
+        	logit("updateUser: Error with bcrypt.GenerateFromPassword, User: "+username)
+		return
+	}
+	confirm_id := randString(30)
+
+	_, err = globalConn.Do("HMSET", userPrefix+username, "new_password", string(hashedPassword), "confirm_id", confirm_id)
+	if err != nil {
+             	logit("updateUser: Error updateing User: "+username)
+	        return
+        }
+	_, err = globalConn.Do("SET", confirmPrefix+confirm_id,username)
+	if err != nil {
+             	logit("updateUser: Error inserting confirm_id: "+confirm_id+": "+username)
+	        return
+        }
+
+        sendEmail(username,confirm_id)
+}
+
+func checkLoginCredentials(username,password string) bool {
+        logit("checkLoginCredentials: called with username,password: "+username+","+password)
+	pwd, err := redis.String(globalConn.Do("HGET", userPrefix+username, "password"))
+        if err == nil {
+	    cid, err := redis.String(globalConn.Do("HGET", userPrefix+username, "confirm_id"))
+            if err == nil {
+                logit("checkLoginCredentials: cid: "+cid)
+                if !(err != nil && cid != "") {
+                     logit("checkLoginCredentials: pwd: "+pwd)
+                     if err != nil {
+                          return false
+                     }
+                }
+            }
+        }
+
+        hashedPassword := []byte(pwd)
+	err = bcrypt.CompareHashAndPassword(hashedPassword, []byte(password))
+	return err == nil
+}
+
+func updateLoginTime(username string) {
+	_, err := globalConn.Do("HSET", userPrefix+username, "last_login", time.Now().UTC().Format("2006-01-02 15:04:05"))
+	if err != nil {
+            logit("updateUser: Error updateing User: "+username)
+	    return
+        }
+}
+
+func confirmUser(confirm_id string) {
+	u, err := redis.String(globalConn.Do("GET", confirmPrefix+confirm_id))
+        if err != nil {
+                logit("confirmUser: Error with searching confirm_id: "+confirm_id)
+                return
+        }
+	new_password, err := redis.String(globalConn.Do("HGET", userPrefix+u, "new_password"))
+        if err != nil {
+                logit("confirmUser: Error with getting new_password: "+u)
+                return
+        }
+	_, err = globalConn.Do("HMSET", userPrefix+u, "confirm_id", "", "password", new_password)
+	if err != nil {
+             	logit("confirmUser: Error updateing User: "+u)
+	        return
+        }
+	_, err = globalConn.Do("DEL", confirmPrefix+confirm_id)
+	if err != nil {
+             	logit("confirmUser: Error deleting confirm_id: "+confirm_id)
+	        return
+        }
+}

snippets/404.html

@@ -0,0 +1,5 @@
+{{define "body_content"}}
+<div class="notification is-danger">
+  <strong>Diese Seite existiert nicht</strong>
+</div>
+{{end}}

snippets/contact.html

@@ -0,0 +1,9 @@
+{{define "body_content"}}
+<p class="title is-4">Kontakt</p>
+<p>nbit Informatik GmbH<br />
+Kirchweg 2<br />
+3510 Konolfingen<br />
+<br />
++41 31 792 00 40<br />
+<a href='&#109;ai&#108;&#116;o&#58;i&#37;6Ef&#111;&#64;%6Ebi&#116;&#46;%63h'>&#105;nfo&#64;nbit&#46;ch</a>
+{{end}}

snippets/index.html

@@ -0,0 +1,28 @@
+{{define "header_additions"}}
+{{end}}
+{{define "body_content"}}
+<p class="title is-4">Die etwas andere Bienenstockwaage...</p>
+<article class="message is-danger">
+  <div class="message-body">
+Aktuell noch in Entwicklung, kommen Sie sp&auml;ter noch einmal vorbei...
+  </div>
+</article>
+{{ if ne .UserName "" }}
+<p>
+  <strong>Ich will weitere bestellen!</strong>
+  <span class="icon"><i class="fa fa-arrow-right"></i></span>
+  Hier geht's zum <a href="/order.html">Bestellformular</a>
+</p>
+{{ else }}
+<p>
+  <strong>Ich will auch eine!</strong>
+  <span class="icon"><i class="fa fa-arrow-right"></i></span>
+  Hier geht's zum <a href="/order.html">Bestellformular</a>
+</p>
+<p>&nbsp;</p>
+<p>
+  <strong>Ich habe bereits eine (oder mehrere)</strong>
+  <span class="icon"><i class="fa fa-arrow-right"></i></span>
+  Hier geht's zum <a href="/login.html">Login</a>
+{{end}}
+{{end}}

snippets/invalid_login.html

@@ -0,0 +1,5 @@
+{{define "body_content"}}
+<div class="notification is-danger">
+  <strong>Ung&uuml;ltiges Login!</strong>
+</div>
+{{end}}

snippets/login.html

@@ -0,0 +1,46 @@
+{{define "body_content"}}
+{{ if ne .UserName "" }}
+Sie sind bereits eingeloggt!
+{{ else }}
+<form class="form-signin" id="login-form" action="/login">
+  <div class="column is-auto">
+    <div class="columns is-centered">
+      <div class="column is-4">
+        <h1 class="title">Login</h1>
+        <div class="field">
+          <p class="control has-icons-left has-icons-right">
+           <input id="email" name="email" class="input is-success is-focused" type="text" placeholder="Email">
+           <span class="icon is-small is-left">
+             <i class="fa fa-envelope"></i>
+           </span>
+           <span class="icon is-small is-right">
+             <i class="fa fa-check"></i>
+           </span>
+         </p>
+       </div>
+       <div class="field">
+         <p class="control has-icons-left has-icons-right">
+           <input id="password" name="password" class="input" type="password" placeholder="Password">
+           <span class="icon is-small is-left">
+             <i class="fa fa-lock"></i>
+           </span>
+           <span class="icon is-small is-right">
+             <i class="fa fa-check"></i>
+           </span>
+         </p>
+       </div>
+       <div class="has-text-centered">
+         <a href="/reset_password.html">Passwort vergessen?</a><br/>
+       </div>
+       <br>
+       <div id="errorbox" class="notification is-danger is-size-7-mobile" style="display: none;">
+       </div>
+       <div class="has-text-centered">
+         <input id="login-button" name="login-button" type="submit" class="form-button button is-primary is-centered" value="Anmelden"></input>
+       </div>
+     </div>
+   </div>
+ </div>
+</form>
+{{end}}
+{{end}}

snippets/order.html

@@ -0,0 +1,8 @@
+{{define "body_content"}}
+<p class="title is-4">Bestellformular</p>
+<article class="message is-danger">
+  <div class="message-body">
+Aktuell noch in Entwicklung, kommen Sie sp&auml;ter noch einmal vorbei...
+  </div>
+</article>
+{{end}}

snippets/reset_password.html

@@ -0,0 +1,46 @@
+{{define "body_content"}}
+{{ if ne .UserName "" }}
+Sie sind bereits eingeloggt!
+{{ else }}
+<p class="title is-4">Passwort zur&uuml;cksetzen</p>
+<div class="notification is-info">
+  <p>Hier k&ouml;nnen Sie ein neues Passwort setzen. Sie erhalten anschliessend eine Meldung zur Best&auml;tigung zugesendet. Das neue Passwort wird erst g&uuml;ltig, wenn Sie die Best&auml;tigung durchgef&uuml;hrt haben.</p>
+</div>
+<form class="form-signin" id="reset-password-form" action="/reset_password">
+  <div class="column is-auto">
+    <div class="columns is-centered">
+      <div class="column is-4">
+        <div class="field">
+          <p class="control has-icons-left has-icons-right">
+           <input id="email" name="email" class="input is-success is-focused" type="text" placeholder="Email">
+           <span class="icon is-small is-left">
+             <i class="fa fa-envelope"></i>
+           </span>
+           <span class="icon is-small is-right">
+             <i class="fa fa-check"></i>
+           </span>
+         </p>
+       </div>
+       <div class="field">
+         <p class="control has-icons-left has-icons-right">
+           <input id="password" name="password" class="input" type="password" placeholder="Password">
+           <span class="icon is-small is-left">
+             <i class="fa fa-lock"></i>
+           </span>
+           <span class="icon is-small is-right">
+             <i class="fa fa-check"></i>
+           </span>
+         </p>
+       </div>
+       <br>
+       <div id="errorbox" class="notification is-danger is-size-7-mobile" style="display: none;">
+       </div>
+       <div class="has-text-centered">
+         <input id="login-button" name="login-button" type="submit" class="form-button button is-primary is-centered" value="Passwort zur&uuml;cksetzen"></input>
+       </div>
+     </div>
+   </div>
+ </div>
+</form>
+{{end}}
+{{end}}

snippets/scales.html

@@ -0,0 +1,7 @@
+{{define "body_content"}}
+{{ if ne .UserName "" }}
+<p>Datenauswertung</p>
+{{ else }}
+<h4>Bitte zuerst <a href="login.html">einloggen</a></h4>
+{{end}}
+{{end}}

snippets/user_does_not_exist.html

@@ -0,0 +1,5 @@
+{{define "body_content"}}
+<div class="notification is-danger">
+  <strong>Benutzer existiert nicht!</strong>
+</div>
+{{end}}

static/css/mini-beieli-web.css

@@ -0,0 +1,29 @@
+.image.is-10by1 img, .image.is-20by3 img {
+   bottom: 0;
+   left: 0;
+   position: absolute;
+   right: 0;
+   top: 0;
+   height: 100%;
+   width: 100%;
+}
+
+.image.is-10by1 {
+   padding-top: 10%;
+}
+
+.image.is-20by3 {
+   padding-top: 15%;
+}
+
+hr {
+  margin: 0px 0 5px 0;
+}
+
+.signup-box {
+  margin: auto;
+  width: 300px;
+  background: rgba(255,255,255,0.05);
+  border: 1px solid rgba(255,255,255,0.3);
+  border-radius: 10px;
+}

static/js/mini-beieli-web.js

@@ -0,0 +1,70 @@
+      $(document).ready(function() {
+
+        $("#email").focus();
+
+        // Check for click events on the navbar burger icon
+        $(".navbar-burger").click(function() {
+          // Toggle the "is-active" class on both the "navbar-burger" and the "navbar-menu"
+          $(".navbar-burger").toggleClass("is-active");
+          $(".navbar-menu").toggleClass("is-active");
+
+        });
+
+        // Login Button
+        $("#login-button").click(function(e){
+          //alert(true);
+          $("#login-form").submit();
+        });
+
+        // Login Form
+        $("#login-form-blabla").submit(function(e){
+            e.preventDefault();
+            var formData = {
+              next: $("#email").val(),
+              email: $("#email").val(),
+              password: $("#password").val(),
+              csrf_token: $("#csrf_token").val(),
+              next: $("#next").val()
+            };
+
+            //console.log(formData);
+            // send ajax
+            $.ajax({
+                url: '/login', // url where to submit the request
+                type : "POST", // type of action POST || GET
+                dataType : 'json', // data type
+                contentType: 'application/json',
+                data : JSON.stringify(formData), // post data || get data
+                success : function(result) {
+                    // you can see the result from the console
+                    // tab of the developer tools
+                    console.log('SUCCESS');
+                    console.log(result);
+                    window.location.replace("/");
+                },
+                error: function(result) {
+                    //console.log(xhr, resp, text);
+                    console.log('ERROR');
+                    console.log(result);
+                    var errortext = '<ul style="list-style-type:disc">';
+                    a = result.responseJSON.response.errors.email;
+                    if (a != undefined) {
+                      for (i=0; i < a.length; ++i) {
+                        errortext = errortext + "<li>" + a[i] + "</li>";
+                      }
+                    } 
+                    a = result.responseJSON.response.errors.password;
+                    if (a != undefined) {
+                      for (i=0; i < a.length; ++i) {
+                        errortext = errortext + "<li>" + a[i] + "</li>";
+                      }
+                    } 
+                    errortext = errortext + "</ul>";
+                    $('#errorbox').html(errortext);
+                    $('#errorbox').show();
+                }
+            })
+        });
+
+
+      });

systemd/mini-beieli-web.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=mini-beieli web service
+After=syslog.target
+After=network.target
+
+[Service]
+Type=simple
+User=beieli
+Group=beieli
+WorkingDirectory=/home/beieli/mini-beieli-web
+ExecStart=/home/beieli/mini-beieli-web/mini-beieli-web
+Restart=always
+
+[Install]
+WantedBy=multi-user.target

templates/layout.html

@@ -0,0 +1,88 @@
+{{define "header_additions"}}{{end}}
+{{define "layout"}}<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>mini-beieli.ch - die besondere Bienenstockwaage</title>
+    <link rel="stylesheet" href="/static/css/bulma-0.7.4/bulma.min.css">
+    <link rel="stylesheet" href="static/css/mini-beieli-web.css">
+
+    <script defer src="/static/js/fontawesome-5.1.0/all.js"></script>
+    <script src="/static/js/jquery-3.3.1/jquery.min.js"></script>
+{{template "header_additions" . }}
+  </head>
+  <body>
+    <section class="section">
+      <div class="container">
+      <figure class="image is-hidden-mobile is-20by3">
+        <img src="/static/images/bees-banner-1000x150.jpg" alt="mini-beieli Banner" >
+      </figure>
+      <figure class="image is-hidden-tablet is-3by1">
+        <img src="/static/images/bees-banner-450x150.jpg" alt="mini-beieli Banner" >
+      </figure>
+      <nav class="navbar" role="navigation" aria-label="main navigation">
+        <div class="navbar-brand">
+          <a class="navbar-item" href="/">
+            <img src="/static/images/bee-logo-28.png" alt="mini-beieli Logo" width="28" height="28">
+          </a>
+          <a role="button" class="navbar-burger" data-target="navMenu" aria-label="menu" aria-expanded="false">
+            <span aria-hidden="true"></span>
+            <span aria-hidden="true"></span>
+            <span aria-hidden="true"></span>
+          </a>
+        </div>
+        <div class="navbar-menu" id="navMenu">
+          <div class="navbar-start">
+            <a class="navbar-item" href="/">
+              <div style="position:relative">  
+                <span class="icon"><i class="fa fa-home"></i></span>
+                <span>Home</span>
+              </div>
+            </a>
+            <a class="navbar-item" href="/contact.html">
+              <div style="position:relative">  
+                <span class="icon"><i class="fa fa-address-card"></i></span>
+                <span>Kontakt</span>
+              </div>
+            </a>
+{{ if ne .UserName "" }}
+            <a class="navbar-item" href="/scales.html">
+              <div style="position:relative">  
+                <span class="icon"><i class="fa fa-balance-scale"></i></span>
+                <span>Meine Waagen</span>
+              </div>
+            </a>
+{{ end }}
+          </div>
+          <div class="navbar-end">
+{{ if ne .UserName "" }}
+            <a class="navbar-item" href="/logout">
+              <div style="position:relative">  
+                <span class="icon"><i class="fa fa-sign-out-alt"></i></span>
+                <span>Logout {{ .UserName }}</span>
+              </div>
+            </a>
+{{ else }}
+            <a class="navbar-item" href="/login.html">
+              <div style="position:relative">  
+                <span class="icon"><i class="fa fa-sign-in-alt"></i></span>
+                <span>Login</span>
+              </div>
+            </a>
+{{ end }}
+
+
+
+
+          </div>
+        </div>
+      </nav>
+      <hr />
+      {{template "body_content" . }}
+     </div>
+    </section>
+    <script src="/static/js/mini-beieli-web.js"></script>
+  </body>
+</html>
+{{end}}