dial test for tcp proxy list

.gitignore

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+.idea
+go.sum
+*.txt

go.mod

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+module proxyVerify
+
+go 1.19

main.go

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+/*
+*
+@author: sre
+@date: 2022/8/9 0009
+*
+*/
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"net"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	lines, err := readlines("target.txt")
+	if err != nil {
+		return
+	}
+	for _, line := range lines {
+		switch {
+		case strings.Index(line, "http://") == 0:
+			fmt.Println("http proxy	", line)
+			ipPort := strings.Split(line, "//")[1]
+			portStr := strings.Split(ipPort, ":")[1]
+			port, err := strconv.Atoi(portStr)
+			if err != nil {
+				fmt.Println("port error:", err)
+			}
+			ip := strings.Split(ipPort, ":")[0]
+			fmt.Println("ip			", ip)
+			fmt.Println("port			", port)
+			if isPortOpen(ip, port) {
+				fmt.Println("port is open")
+				fmt.Println("proxy ok")
+				writeline("success.txt", line)
+			} else {
+				fmt.Println("port is not open")
+				writeline("fail.txt", line)
+			}
+		case strings.Index(line, "https://") == 0:
+			fmt.Println("https proxy	", line)
+		case strings.Index(line, "socks5://") == 0:
+			fmt.Println("socks5 proxy	", line)
+		case strings.Index(line, "socks4://") == 0:
+			fmt.Println("socks4 proxy	", line)
+		case strings.Index(line, "socks://") == 0:
+			fmt.Println("socks proxy	", line)
+		default:
+			fmt.Println("unknown proxy	", line)
+		}
+	}
+
+}
+
+// function to verify a tcp port is open or not
+func isPortOpen(host string, port int) bool {
+	conn, err := net.Dial("tcp", host+":"+strconv.Itoa(port))
+	if err != nil {
+		return false
+	}
+	defer conn.Close()
+	return true
+}
+
+// readlines reads lines from a file and returns a slice of strings.
+func readlines(filename string) ([]string, error) {
+	file, err := os.Open(filename)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	var lines []string
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		lines = append(lines, scanner.Text())
+	}
+	return lines, scanner.Err()
+}
+
+// writeline appends a line to a file.
+func writeline(filename string, line string) error {
+	file, err := os.OpenFile(filename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	_, err = file.WriteString(line + "\n")
+	return err
+}

readme.md

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+quick tcp proxy dia test, read proxy list file and write to result
+
+target.txt
+```
+socks5://34.92.218.103:20000
+http://34.92.218.103:20000
+https://34.92.218.103:20000
+http://127.0.0.1:8118
+http://123.3.3.4:28118
+```
+
+success.txt
+```
+```
+
+fail.txt
+```
+```
+
+
+
+代理可用性批量检测- Python version
+
+https://kingly.life/2022/07/08/%e4%bb%a3%e7%90%86%e5%8f%af%e7%94%a8%e6%80%a7%e6%89%b9%e9%87%8f%e6%a3%80%e6%b5%8b-python.html