Whois implementation speedrun

Signed-off-by: caramel <caramel@caramel.horse>

data/dns.fur.meta

@@ -0,0 +1,4 @@
+DotFur Internal
+7:46PM August 13th, 2024
+7:46PM August 13th, 2034
+ok

data/dot.fur.meta

@@ -0,0 +1,4 @@
+DotFur Internal
+7:46PM August 13th, 2024
+7:46PM August 13th, 2034
+ok

data/example.fur

@@ -0,0 +1,41 @@
+----------------------------------------------------------------
+Hi! This is example.fur, a domain registered for use in 
+documentation, or when you need to use an example domain in
+any conversation, text, or anywhere else! 
+
+For example: When formatting a whois request on debian using
+the APT `whois` package, you can specify a host with
+`whois example.fur -h hostname`, which will send a whois req
+to the server `hostname`.
+
+Because this domain is an example one, there's no ownership
+information to return via WHOIS protocol, so instead we made
+you a gay unicode cat, because everyone likes gay unicode cats.
+
+⠀⠀⠀⢰⠶⣄⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⣠⠶⠲⣄⠀
+⠀⠀⣠⡟⠀⠈⠙⢦⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀⡶⣦⣀⠀⠀⠀⠀⠀⠀⠀⠀⣠⠾⠋⠁⠀⠀⢽⡄
+⠀⠀⡿⠀⠀⠀⠀⠀⠉⠷⣄⣀⣤⠤⠤⠤⠤⢤⣷⡀⠙⢷⡄⠀⠀⠀⠀⣠⠞⠉⠀⠀⠀⠀⠀⠈⡇
+⠀⢰⡇⠀⠀⠀⠀⠀⠀⠀⠉⠳⣄⠀⠀⠀⠀⠀⠈⠁⠀⠀⠹⣦⠀⣠⡞⠁⠀⠀⠀⠀⠀⠀⠀⠀⡗
+⠀⣾⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠃⠀⠀⠀⠀⠀⠀⠀⠀⠀⠘⣻⠇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣏
+⠀⣿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢠⡇
+⠀⡿⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣾⠂
+⠀⢿⠀⠀⠀⠀⣤⣤⣤⣀⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⣤⣤⣤⣤⣤⡀⠀⠀⠀⠀⠀⣸⠇⠀
+⠀⠘⣇⠀⠀⠀⠀⠉⠉⠛⠛⢿⣶⣦⠀⠀⠀⠀⠀⠀⢴⣾⣟⣛⡋⠋⠉⠉⠁⠀⠀⠀⠀⣴⠏⠀⠀
+⢀⣀⠙⢷⡄⠀⠀⣀⣤⣶⣾⠿⠋⠁⠀⢴⠶⠶⠄⠀⠀⠉⠙⠻⠿⣿⣷⣶⡄⠀⠀⡴⠾⠛⠛⣹⠇
+⢸⡍⠉⠉⠉⠀⠀⠈⠉⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠀⠀⠀⠀⣬⠷⣆⣠⡤⠄⢀⣤⠞⠁⠀
+⠈⠻⣆⡀⠶⢻⣇⡴⠖⠀⠀⠀⣴⡀⣀⡴⠚⠳⠦⣤⣤⠾⠀⠀⠀⠀⠀⠘⠟⠋⠀⠀⠀⢻⣄⠀⠀
+⠀⠀⣼⠃⠀⠀⠉⠁⠀⠀⠀⠀⠈⠉⢻⡆⠀⠀⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⠀⠀
+⠀⢠⡇⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣿⡀⠀⠀⢀⡇⠀⠀⠀⠀⠀⠀⠀⠀⣀⡿⠧⠿⠿⠟⠀⠀
+⠀⣾⡴⠖⠛⠳⢦⣿⣶⣄⣀⠀⠀⠀⠀⠘⢷⣀⠀⣸⠃⠀⠀⠀⣀⣀⣤⠶⠚⠉⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠈⢷⡀⠈⠻⠦⠀⠀⠀⠀⠉⠉⠁⠀⠀⠀⠀⠹⣆⡀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⢀⡴⠟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⢳⡄⠀⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⢠⡟⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠻⡄⠀⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠈⠉⠛⠛⢲⡗⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢻⡆⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣸⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢸⡇⠀⠀⠀⠀⠀⠀⠀
+⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠙⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠈⠋⠀⠀⠀⠀⠀⠀⠀
+
+.... You may need to make sure your whois client or terminal
+support UTF-8 in order to see this gay unicode cat.
+
+Much love,
+- .fur WHOIS Server~

data/example.fur.meta

@@ -0,0 +1,4 @@
+DotFur Internal
+7:46PM August 13th, 2024
+7:46PM August 13th, 2034
+ok

data/nic.fur.meta

@@ -0,0 +1,4 @@
+DotFur Internal
+7:46PM August 13th, 2024
+7:46PM August 13th, 2034
+ok

data/whois.fur.meta

@@ -0,0 +1,4 @@
+DotFur Internal
+7:46PM August 13th, 2024
+7:46PM August 13th, 2034
+ok

main.go

@@ -0,0 +1,161 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"net"
+	"os"
+	"strings"
+	"time"
+)
+
+const (
+	port         = "43"
+	whoisversion = "v0.01"
+	dataDir      = "./data" // Directory where domain files are stored
+	crlf         = "\r\n"
+)
+
+// Function to get metadata for a domain
+func getDomainMetadata(domain string) (string, string, string, string, error) {
+	metaFilePath := fmt.Sprintf("%s/%s.meta", dataDir, domain)
+	file, err := os.Open(metaFilePath)
+	if err != nil {
+		return "", "", "", "", err
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	var registrar, registrationDate, expirationDate, status string
+	if scanner.Scan() {
+		registrar = scanner.Text()
+	}
+	if scanner.Scan() {
+		registrationDate = scanner.Text()
+	}
+	if scanner.Scan() {
+		expirationDate = scanner.Text()
+	}
+	if scanner.Scan() {
+		status = scanner.Text()
+	}
+
+	if err := scanner.Err(); err != nil {
+		return "", "", "", "", err
+	}
+
+	return registrar, registrationDate, expirationDate, status, nil
+}
+
+func handleConnection(conn net.Conn) {
+	defer conn.Close()
+
+	// Get the client's IP address
+	clientIP := conn.RemoteAddr().String()
+
+	// Read the domain name from the client
+	reader := bufio.NewReader(conn)
+	request, err := reader.ReadString('\n')
+	if err != nil {
+		log.Println("Error reading from connection:", err)
+		return
+	}
+
+	// Clean up the request
+	domain := strings.TrimSpace(request)
+
+	// Get the current timestamp
+	timestamp := time.Now().Format(time.RFC3339)
+
+	// Check if the domain file exists
+	filePath := fmt.Sprintf("%s/%s", dataDir, domain)
+	domainInfo, err := ioutil.ReadFile(filePath)
+	if err != nil {
+		// Domain file not found, so check if metadata file exists
+		metaFilePath := fmt.Sprintf("%s/%s.meta", dataDir, domain)
+		if _, err := os.Stat(metaFilePath); err == nil {
+			// Metadata file exists but domain file doesn't
+			registrar, registrationDate, expirationDate, status, err := getDomainMetadata(domain)
+			if err != nil {
+				log.Println("Error reading metadata file:", err)
+				conn.Write([]byte("Error reading domain metadata" + crlf))
+				return
+			}
+			response := fmt.Sprintf("       __        __      ____            \n  ____/ /____   / /_    / __/__  __ _____\n / __  // __ \\ / __/   / /_ / / / // ___/\n/ /_/ // /_/ // /_ _  / __// /_/ // /      | \n\\__,_/ \\____/ \\__/(_)/_/   \\__,_//_/       |      dot.fur WHOIS Server\n _       __ __  __ ____   ____ _____       |  whois.fur | whois.dotfur.net\n| |     / // / / // __ \\ /  _// ___/       |         Version: %s\n| | /| / // /_/ // / / / / /  \\__ \\        |\n| |/ |/ // __  // /_/ /_/ /  ___/ /      \n|__/|__//_/ /_/ \\____//___/ /____/       \n                                         \n", whoisversion)
+			response += fmt.Sprintf(
+				"Domain: %s%sOrigin IP: %s%sTimestamp: %s%sRegistrar: %s%sRegistration Date: %s%sExpiration Date: %s%sStatus: %s%sNo WHOIS Info to show%s",
+				domain, crlf,
+				clientIP, crlf,
+				timestamp, crlf,
+				registrar, crlf,
+				registrationDate, crlf,
+				expirationDate, crlf,
+				status, crlf,
+				crlf)
+			response += fmt.Sprintf("\n.fur WHOIS Server | https://git.fur/caramel/whois | Version: %s", whoisversion)
+			response += crlf
+
+			conn.Write([]byte(response))
+		} else {
+			// Both domain file and metadata file not found
+			log.Println("Domain and metadata file not found")
+			conn.Write([]byte("Domain not found" + crlf))
+		}
+		return
+	}
+
+	// Domain file found, get metadata for the domain
+	registrar, registrationDate, expirationDate, status, err := getDomainMetadata(domain)
+	if err != nil {
+		log.Println("Error reading metadata file:", err)
+		conn.Write([]byte("Error reading domain metadata" + crlf))
+		return
+	}
+
+	// Format the response with additional fields, origin IP, and timestamp
+	response := fmt.Sprintf("       __        __      ____            \n  ____/ /____   / /_    / __/__  __ _____\n / __  // __ \\ / __/   / /_ / / / // ___/\n/ /_/ // /_/ // /_ _  / __// /_/ // /      | \n\\__,_/ \\____/ \\__/(_)/_/   \\__,_//_/       |      dot.fur WHOIS Server\n _       __ __  __ ____   ____ _____       |  whois.fur | whois.dotfur.net\n| |     / // / / // __ \\ /  _// ___/       |         Version: %s\n| | /| / // /_/ // / / / / /  \\__ \\        |\n| |/ |/ // __  // /_/ /_/ /  ___/ /      \n|__/|__//_/ /_/ \\____//___/ /____/       \n                                         \n", whoisversion)
+	response += fmt.Sprintf(
+		"Domain: %s%sOrigin IP: %s%sTimestamp: %s%sRegistrar: %s%sRegistration Date: %s%sExpiration Date: %s%sStatus: %s%s%s",
+		domain, crlf,
+		clientIP, crlf,
+		timestamp, crlf,
+		registrar, crlf,
+		registrationDate, crlf,
+		expirationDate, crlf,
+		status, crlf,
+		string(domainInfo))
+
+	// Add a final CRLF to signify the end of the response
+	response += fmt.Sprintf("\n.fur WHOIS Server | https://git.fur/caramel/whois | Version: %s", whoisversion)
+	response += crlf
+
+	// Send the response back to the client
+	conn.Write([]byte(response))
+
+	log.Printf("Served domain: %s to %s at %s\n", domain, clientIP, timestamp)
+}
+
+func main() {
+	// Start the TCP server
+	listener, err := net.Listen("tcp", ":"+port)
+	if err != nil {
+		log.Fatalf("Error starting server: %s", err)
+	}
+	defer listener.Close()
+
+	log.Printf("Whois server running on port %s\n", port)
+
+	for {
+		// Accept incoming connections
+		conn, err := listener.Accept()
+		if err != nil {
+			log.Println("Error accepting connection:", err)
+			continue
+		}
+
+		// Handle the connection in a new goroutine
+		go handleConnection(conn)
+	}
+}

readme.md

@@ -0,0 +1 @@
+Domain WHOIS contents are stored in `data`, in a plaintext named with the domain `example.fur`, and an accompanying file `example.fur.meta` which contains the Registration date, Expiry date, EPP status, and registrar.