add cname files

dyndns/handler/cname.go

@@ -0,0 +1,120 @@
+package handler
+
+import (
+	"fmt"
+	"net/http"
+	"strconv"
+
+	"github.com/benjaminbear/docker-ddns-server/dyndns/model"
+	"github.com/benjaminbear/docker-ddns-server/dyndns/nswrapper"
+	"github.com/jinzhu/gorm"
+	"github.com/labstack/echo/v4"
+)
+
+// ListCNames fetches all cnames from database and lists them on the website.
+func (h *Handler) ListCNames(c echo.Context) (err error) {
+	if !h.AuthAdmin {
+		return c.JSON(http.StatusUnauthorized, &Error{UNAUTHORIZED})
+	}
+
+	cnames := new([]model.CName)
+	if err = h.DB.Preload("Target").Find(cnames).Error; err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	return c.Render(http.StatusOK, "listcnames", echo.Map{
+		"cnames": cnames,
+	})
+}
+
+// AddCName just renders the "add cname" website.
+// Therefore all host entries from the database are being fetched.
+func (h *Handler) AddCName(c echo.Context) (err error) {
+	if !h.AuthAdmin {
+		return c.JSON(http.StatusUnauthorized, &Error{UNAUTHORIZED})
+	}
+
+	hosts := new([]model.Host)
+	if err = h.DB.Find(hosts).Error; err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	return c.Render(http.StatusOK, "addcname", echo.Map{
+		"config": h.Config,
+		"hosts":  hosts,
+	})
+}
+
+// CreateCName validates the cname data from the "add cname" website,
+// adds the cname entry to the database,
+// and adds the entry to the DNS server.
+func (h *Handler) CreateCName(c echo.Context) (err error) {
+	if !h.AuthAdmin {
+		return c.JSON(http.StatusUnauthorized, &Error{UNAUTHORIZED})
+	}
+
+	cname := &model.CName{}
+	if err = c.Bind(cname); err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	host := &model.Host{}
+	if err = h.DB.First(host, c.FormValue("target_id")).Error; err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	cname.Target = *host
+
+	if err = c.Validate(cname); err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	if err = h.checkUniqueHostname(cname.Hostname, cname.Target.Domain); err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	if err = h.DB.Create(cname).Error; err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	if err = nswrapper.UpdateRecord(cname.Hostname, fmt.Sprintf("%s.%s", cname.Target.Hostname, cname.Target.Domain), "CNAME", cname.Target.Domain, cname.Ttl); err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	return c.JSON(http.StatusOK, cname)
+}
+
+// DeleteCName fetches a cname entry from the database by "id"
+// and deletes the database and DNS server entry to it.
+func (h *Handler) DeleteCName(c echo.Context) (err error) {
+	if !h.AuthAdmin {
+		return c.JSON(http.StatusUnauthorized, &Error{UNAUTHORIZED})
+	}
+
+	id, err := strconv.Atoi(c.Param("id"))
+	if err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	cname := &model.CName{}
+	if err = h.DB.First(cname, id).Error; err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	err = h.DB.Transaction(func(tx *gorm.DB) error {
+		if err = tx.Unscoped().Delete(cname).Error; err != nil {
+			return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+		}
+
+		return nil
+	})
+	if err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	if err = nswrapper.DeleteRecord(cname.Hostname, cname.Target.Domain); err != nil {
+		return c.JSON(http.StatusBadRequest, &Error{err.Error()})
+	}
+
+	return c.JSON(http.StatusOK, id)
+}

dyndns/model/cname.go

@@ -0,0 +1,14 @@
+package model
+
+import (
+	"github.com/jinzhu/gorm"
+)
+
+// CName is a dns cname entry.
+type CName struct {
+	gorm.Model
+	Hostname string `gorm:"not null" form:"hostname" validate:"required,hostname"`
+	Target   Host   `validate:"required,hostname"`
+	TargetID uint
+	Ttl      int `form:"ttl" validate:"required,min=20,max=86400"`
+}

dyndns/views/addcname.html

@@ -0,0 +1,48 @@
+{{define "content"}}
+    <div class="p-4" style="background-color: #e9ecef">
+        <h3 class="text-center mb-4">Add CName Entry</h3>
+            <form id="editHostForm" action="javascript:void(0);">
+            <div class="row mt-3">
+                <div class="col-1"></div>
+                <div class="col-2 text-right">Hostname:</div>
+                <div class="col-8 input-group">
+                    <input type="text" class="form-control" placeholder="Enter hostname" name="hostname">
+                    <div class="input-group-append">
+                        <input type="text" class="form-control" placeholder="Select target.." id="domain_mirror" readonly>
+                    </div>
+                </div>
+                <div class="col-1"></div>
+            </div>
+            <div class="row mt-3">
+                <div class="col-1"></div>
+                <div class="col-2 text-right">Target:</div>
+                <div class="col-8">
+                    <select class="custom-select" name="target_id" id="target_id" onchange="newTargetSelected()">
+                        <option selected>Choose...</option>
+                        {{range $host := .hosts}}
+                        <a class="dropdown-item"><option label="{{$host.Hostname}}.{{$host.Domain}}" value="{{$host.ID}}">{{$host.Hostname}}</option></a>
+                        {{end}}
+                    </select>
+                </div>
+                <div class="col-1"></div>
+            </div>
+            <div class="row mt-3">
+                <div class="col-1"></div>
+                <div class="col-2 text-right">TTL:</div>
+                <div class="col-8">
+                    <select class="form-control" name="ttl">
+                        <option value="20" {{if .cname.Ttl }}{{if eq .cname.Ttl 20 }}selected{{end}}{{end}}>20 s.  Super dynamic DNS for frequent updates</option>
+                        <option value="60" {{if .cname.Ttl }}{{if eq .cname.Ttl 60 }}selected{{end}}{{end}}>60 s.  Default dynamic DNS value</option>
+                        <option value="3600" {{if .cname.Ttl }}{{if eq .cname.Ttl 3600 }}selected{{end}}{{end}}>1 hr.  Rarely updated IP address</option>
+                        <option value="14400" {{if .cname.Ttl }}{{if eq .cname.Ttl 14400 }}selected{{end}}{{end}}>4 hrs. Static record with benefits of DNS caching</option>
+                    </select>
+                </div>
+                <div class="col-1"></div>
+            </div>
+            <div class="row mt-3">
+                <div class="col-11 d-flex justify-content-end"><button id="{{.cname.ID}}" class="add cname btn btn-primary">Add CName Entry</button></div>
+                <div class="col-1"></div>
+            </div>
+        </form>
+    </div>
+{{end}}

dyndns/views/listcnames.html

@@ -0,0 +1,25 @@
+{{define "content"}}
+<div class="container marketing">
+    <h3 class="text-center mb-4">DNS CName Entries</h3>
+    <table class="table table-striped text-center">
+        <thead>
+        <tr>
+            <th>Hostname</th>
+            <th>Target</th>
+            <th>TTL</th>
+            <th><button class="addCName btn btn-primary">Add CName Entry</button></th>
+        </tr>
+        </thead>
+        <tbody>
+        {{range .cnames}}
+        <tr>
+            <td>{{.Hostname}}.{{.Target.Domain}}</td>
+            <td>{{.Target.Hostname}}.{{.Target.Domain}}</td>
+            <td>{{.Ttl}}</td>
+            <td><button id="{{.ID}}" class="deleteCName btn btn-outline-secondary btn-sm"><img src="/static/icons/trash.svg" alt="" width="16" height="16" title="Delete"></button></td>
+        </tr>
+        {{end}}
+        </tbody>
+    </table>
+</div>
+{{end}}