update

README.md

@@ -1 +1,4 @@
-# PortChecker
+# portchecker
+
+[![Hits](https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2Foneclickvirt%2Fportchecker&count_bg=%2323E01C&title_bg=%23555555&icon=sonarcloud.svg&icon_color=%23E7E7E7&title=hits&edge_flat=false)](https://hits.seeyoufarm.com)
+

cmd/main.go

@@ -0,0 +1,113 @@
+package main
+
+import (
+	"bufio"
+	"flag"
+	"fmt"
+	"net"
+	"net/http"
+	"strings"
+	"sync"
+	"time"
+)
+
+// 检查本地25端口是否开放
+func isLocalPortOpen(port string) bool {
+	ln, err := net.Listen("tcp", ":"+port)
+	if err != nil {
+		return false
+	}
+	ln.Close()
+	return true
+}
+
+// 检测是否可连接SMTP服务器的25端口
+func checkSMTPConnection(name string, host string, port string, resultChan chan<- string, wg *sync.WaitGroup) {
+	defer wg.Done()
+	address := net.JoinHostPort(host, port)
+	conn, err := net.DialTimeout("tcp", address, 5*time.Second)
+	if err != nil {
+		resultChan <- fmt.Sprintf("%-9s %-19s: ❌", name, host)
+		return
+	}
+	defer conn.Close()
+	reader := bufio.NewReader(conn)
+	response, err := reader.ReadString('\n')
+	if err != nil {
+		resultChan <- fmt.Sprintf("%-9s %-19s: ❌", name, host)
+		return
+	}
+	status := "❌"
+	if strings.Split(response, " ")[0] == "220" {
+		status = "✔"
+	}
+	resultChan <- fmt.Sprintf("%-9s %-19s: %s", name, host, status)
+}
+
+func smtpCheck(language string) string {
+	smtpServers := map[string]string{
+		"Gmail":     "smtp.gmail.com",
+		"163":       "smtp.163.com",
+		"Yandex":    "smtp.yandex.com",
+		"Office365": "smtp.office365.com",
+		"QQ":        "smtp.qq.com",
+		"Outlook":   "smtp.outlook.com",
+		"Yahoo":     "smtp.mail.yahoo.com",
+		"Apple":     "smtp.mail.me.com",
+		"MailRU":    "smtp.mail.ru",
+		"AOL":       "smtp.aol.com",
+		"GMX":       "smtp.gmx.com",
+		"MailCOM":   "smtp.mail.com",
+		"Sohu":      "smtp.sohu.com",
+		"Sina":      "smtp.sina.com",
+	}
+
+	var wg sync.WaitGroup
+	resultChan := make(chan string, len(smtpServers))
+
+	for name, host := range smtpServers {
+		wg.Add(1)
+		go checkSMTPConnection(name, host, "25", resultChan, &wg)
+	}
+	wg.Wait()
+	close(resultChan)
+	var results []string
+	for result := range resultChan {
+		results = append(results, result)
+	}
+	var res string
+	if language == "zh" {
+		if isLocalPortOpen("25") {
+			res += "本地25端口                   : ✔\n"
+		} else {
+			res += "本地25端口                   : ❌\n"
+		}
+	} else {
+		if isLocalPortOpen("25") {
+			res += "Local 25 Port               : ✔\n"
+		} else {
+			res += "Local 25 Port               : ❌\n"
+		}
+	}
+	for _, result := range results {
+		res += result + "\n"
+	}
+	return res
+}
+
+func main() {
+	flag.Parse()
+	go func() {
+		http.Get("https://hits.seeyoufarm.com/api/count/incr/badge.svg?url=https%3A%2F%2Fgithub.com%2Foneclickvirt%2Fportchecker&count_bg=%2323E01C&title_bg=%23555555&icon=sonarcloud.svg&icon_color=%23E7E7E7&title=hits&edge_flat=false")
+	}()
+	fmt.Println("项目地址:", "https://github.com/oneclickvirt/portchecker")
+	languagePtr := flag.String("l", "", "Language parameter (en or zh)")
+	var language string
+	if *languagePtr == "" {
+		language = "zh"
+	} else {
+		language = strings.ToLower(*languagePtr)
+	}
+	res := smtpCheck(language)
+	fmt.Printf(res)
+}

cmd/main_test.go

@@ -0,0 +1,7 @@
+package main
+
+import "testing"
+
+func TestMain(t *testing.T) {
+	main()
+}

go.mod

@@ -0,0 +1,3 @@
+module github.com/oneclickvirt/PortChecker
+
+go 1.21.5