Initial commit

Author: claudio4

.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*]
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+indent_style = space
+indent_size = 4
+tab_width = 4
+
+[*.md]
+trim_trailing_whitespace = false
+
+[*.{js,json}]
+tab_width = 2
+indent_size = 2

.goreleaser.yml

@@ -0,0 +1,32 @@
+# .goreleaser.yml
+# Build customization
+builds:
+  -
+    main: cmd/cloudflare-ddns/main.go
+    binary: cfddns
+    goos:
+      - windows
+      - darwin
+      - linux
+      - freebsd
+    goarch:
+      - amd64
+      - 386
+      - arm
+      - arm64
+    goarm:
+      - 5
+      - 6
+      - 7
+
+    ignore:
+      - goos: darwin
+        goarch: 386
+archive:
+  format: tar.gz
+  format_overrides:
+    - goos: windows
+      format: zip
+  files:
+      - LICENSE
+      - CREDITS.md

CREDITS.md

@@ -0,0 +1,22 @@
+# CloudFlare-DDNS includes code from:
+
+### failover (MIT License)
+Copyright (c) 2018 Miguel Dorta
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 claudio4
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

cmd/cloudflare-ddns/main.go

@@ -0,0 +1,45 @@
+package main
+
+import (
+	"github.com/claudio4/cloudflare-ddns/pkg/cloudflare"
+	"flag"
+	"os"
+	"fmt"
+	"github.com/claudio4/cloudflare-ddns/pkg/ip"
+)
+
+func main() {
+    var email, apikey, zoneID, domain string
+    flag.StringVar(&email, "email", "", "Your Cloudflare email")
+    flag.StringVar(&apikey, "key", "", "Your Cloudflare API Key")
+    flag.StringVar(&zoneID, "zoneid", "", "Domain's zone ID")
+    flag.StringVar(&domain, "domain", "", "Domain to change")
+    flag.Parse()
+    if email == "" || apikey == "" || zoneID == "" || domain == "" {
+        fmt.Println("Missing parameters: All the following parameters are required")
+        flag.PrintDefaults()
+        os.Exit(1)
+    }
+
+    IP, err := ip.Get()
+    if err != nil {
+        fmt.Fprintln(os.Stderr, err.Error())
+        os.Exit(10)
+    }
+
+    id, content, ttl, err := cloudflare.GetRecordDetails(email, apikey, zoneID, domain)
+    if err != nil {
+        fmt.Fprintln(os.Stderr, err.Error())
+        os.Exit(20)
+    }
+
+    if content == IP {
+        os.Exit(0)
+    }
+
+    err = cloudflare.SetRecord(email, apikey, zoneID, id, "A", domain, IP, ttl)
+    if err != nil {
+        fmt.Fprintln(os.Stderr, err.Error())
+        os.Exit(30)
+    }
+}

pkg/cloudflare/record.go

@@ -0,0 +1,98 @@
+package cloudflare
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/pkg/errors"
+	"io/ioutil"
+	"net/http"
+	"strings"
+	"time"
+)
+
+const baseuri = "https://api.cloudflare.com/client/v4/"
+
+type listRecordSResponse struct {
+	Success  bool     `json:"success"`
+	Errors   []string `json:"errors"`
+	Messages []string `json:"messages"`
+	Result   []struct {
+		ID      string `json:"id"`
+		Name    string `json:"name"`
+		Content string `json:"content"`
+		TTL     int    `json:"ttl"`
+	} `json:"result"`
+}
+
+//GetRecordDetails Gets record's id and ttl
+func GetRecordDetails(email, apikey, zonedID, name string) (string, string, int, error) {
+	client := &http.Client{Timeout: time.Second * 2}
+	req, err := http.NewRequest("GET", fmt.Sprintf("%szones/%s/dns_records", baseuri, zonedID), nil)
+	if err != nil {
+		return "", "", 0, errors.Wrap(err, "Error creating GET request")
+	}
+	req.Header.Set("X-Auth-Email", email)
+	req.Header.Set("X-Auth-Key", apikey)
+
+	res, err := client.Do(req)
+	if err != nil {
+		return "", "", 0, errors.Wrap(err, "Error doing request to Cloudflare")
+	}
+	defer res.Body.Close()
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return "", "", 0, errors.Wrap(err, "Error reading response body")
+	}
+
+	var r listRecordSResponse
+	json.Unmarshal(body, &r)
+	if !r.Success {
+		return "", "", 0, fmt.Errorf("Cloudflare Errors: %+v - Cloudflare Messages: %+v", r.Errors, r.Messages)
+	}
+	var id, content string
+	var ttl int
+	for _, record := range r.Result {
+		if record.Name == name {
+			id = record.ID
+			content = record.Content
+			ttl = record.TTL
+			break
+		}
+	}
+
+	return id, content, ttl, nil
+}
+
+//SetRecord sets record
+func SetRecord(email, apikey, zonedID, recordID, recordType, name, content string, ttl int) error {
+	client := &http.Client{Timeout: time.Second * 2}
+
+	data := fmt.Sprintf(`{"type":"%s","name":"%s","content":"%s","ttl":%d}`, recordType, name, content, ttl)
+	req, err := http.NewRequest("PUT", fmt.Sprintf("%szones/%s/dns_records/%s", baseuri, zonedID, recordID), strings.NewReader(data))
+	if err != nil {
+		return errors.Wrap(err, "Error creating PUT request")
+	}
+
+	req.ContentLength = int64(len(data))
+	req.Header.Set("X-Auth-Email", email)
+	req.Header.Set("X-Auth-Key", apikey)
+	req.Header.Set("Content-Type", "application/json")
+	res, err := client.Do(req)
+	if err != nil {
+		return errors.Wrap(err, "Error doing request to Cloudflare")
+	}
+	defer res.Body.Close()
+
+	body, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return errors.Wrap(err, "Error reading response body")
+    }
+
+    var resMap map[string]interface{}
+	json.Unmarshal(body, &resMap)
+	if !resMap["success"].(bool) {
+		return fmt.Errorf("Cloudflare Errors: %+v - Cloudflare Messages: %+v", resMap["errors"], resMap["messages"])
+	}
+	return nil
+}

pkg/ip/ip.go

@@ -0,0 +1,24 @@
+package ip
+
+import (
+    "strings"
+	"github.com/pkg/errors"
+	"io/ioutil"
+	"net/http"
+)
+
+//Get Returns your ip
+func Get() (string, error) {
+    res, err := http.Get("https://checkip.amazonaws.com/")
+    if err != nil {
+        return "", errors.Wrap(err, "Error requesting the ip")
+    }
+    defer res.Body.Close()
+
+    ip, err := ioutil.ReadAll(res.Body)
+    if err != nil {
+        return "", errors.Wrap(err, "Error reading the request")
+    }
+
+    return strings.TrimSpace(string(ip)), nil
+}