First commit

LICENSE.txt

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+MIT License
+
+Copyright (c) 2017 Igor V Belousov
+
+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.

README.md

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+IP Checker
+==========
+
+This program check modify IPv4 address and send notification. 
+
+Only windows platform. 
+Only for me. ;-)
+
+Build
+-----
+
+```cmd
+go get github.com/akavel/rsrc
+
+rsrc -manifest ip_checker.manifest.txt -ico icon.ico -o rsrc.syso
+
+go build -ldflags="-H windowsgui -s -w"
+```
+
+License
+-------
+
+### Icon
+Icon made by <a href="http://www.freepik.com" title="Freepik">Freepik</a> from <a href="http://www.flaticon.com" title="Flaticon">www.flaticon.com</a> is licensed by <a href="http://creativecommons.org/licenses/by/3.0/" title="Creative Commons BY 3.0" target="_blank">CC 3.0 BY</a>
+
+### Program 
+
+MIT License
+
+Copyright (c) 2017 Igor V Belousov
+
+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.

ip_checker.manifest.txt

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+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0" xmlns:asmv3="urn:schemas-microsoft-com:asm.v3">
+	<assemblyIdentity version="1.0.0.0" processorArchitecture="*" name="ip_checker" type="win32"/>
+	<dependency>
+		<dependentAssembly>
+			<assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls" version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"/>
+		</dependentAssembly>
+	</dependency>
+	<asmv3:application>
+		<asmv3:windowsSettings xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">
+			<dpiAware>true</dpiAware>
+		</asmv3:windowsSettings>
+	</asmv3:application>
+    <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
+        <application>
+            <!-- Windows 10 -->
+            <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}"/>
+        </application>
+    </compatibility>
+</assembly>

main.go

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+package main
+
+import (
+	"fmt"
+	"github.com/lxn/walk"
+	"github.com/marcsauter/single"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"time"
+)
+
+func get_ip() (string, error) {
+	resp, err := http.Get("https://4.ifcfg.me/ip")
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return "", err
+	}
+	ip := fmt.Sprintf("%s", body)
+	return ip, err
+}
+
+var old_ip string
+
+func main() {
+	single_proc := single.New("name")
+	single_proc.Lock()
+	defer single_proc.Unlock()
+
+	mw, err := walk.NewMainWindow()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	icon, err := walk.NewIconFromResourceId(9)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	ni, err := walk.NewNotifyIcon()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer ni.Dispose()
+
+	if err := ni.SetIcon(icon); err != nil {
+		log.Fatal(err)
+	}
+
+	exitAction := walk.NewAction()
+	if err := exitAction.SetText("E&xit"); err != nil {
+		log.Fatal(err)
+	}
+	exitAction.Triggered().Attach(func() { walk.App().Exit(0) })
+	if err := ni.ContextMenu().Actions().Add(exitAction); err != nil {
+		log.Fatal(err)
+	}
+
+	if err := ni.SetVisible(true); err != nil {
+		log.Fatal(err)
+	}
+
+	go func() {
+		first_loop := true
+		for first_loop {
+			ip, ip_err := get_ip()
+			if ip_err == nil {
+				first_loop = false
+				old_ip = ip
+				if err := ni.ShowCustom(
+					"IP Checker",
+					" Current IP is "+old_ip); err != nil {
+
+					log.Fatal(err)
+				}
+
+				go func() {
+					for {
+						time.Sleep(time.Second * 60)
+						ip, ip_err := get_ip()
+						if ip_err == nil {
+							if old_ip != ip {
+								if err := ni.ShowCustom(
+									"IP Checker",
+									" Old IP - "+old_ip+" New IP - "+ip); err != nil {
+
+									log.Fatal(err)
+								}
+								old_ip = ip
+							}
+						}
+					}
+				}()
+
+			}
+		}
+
+	}()
+
+	mw.Run()
+}