import { spawn } from "child_process";
export interface SubfinderResult {
subdomains: string[];
count: number;
error?: string;
}
export async function executeSubfinder(
domain: string,
silent: boolean = true
): Promise<SubfinderResult> {
return new Promise((resolve) => {
const args = ["-d", domain, "-json"];
if (silent) args.push("-silent");
const subdomains: string[] = [];
let errorOutput = "";
const process = spawn("subfinder", args);
process.stdout.on("data", (data) => {
const lines = data.toString().split("\n").filter((line: string) => line.trim());
for (const line of lines) {
try {
const parsed = JSON.parse(line);
if (parsed.host) {
subdomains.push(parsed.host);
}
} catch (e) {
// If not JSON, treat as plain subdomain
if (line.trim()) subdomains.push(line.trim());
}
}
});
process.stderr.on("data", (data) => {
errorOutput += data.toString();
});
process.on("close", (code) => {
if (code !== 0 && subdomains.length === 0) {
resolve({
subdomains: [],
count: 0,
error: `subfinder exited with code ${code}: ${errorOutput}`,
});
} else {
resolve({
subdomains: [...new Set(subdomains)], // Remove duplicates
count: subdomains.length,
});
}
});
process.on("error", (err) => {
resolve({
subdomains: [],
count: 0,
error: `Failed to execute subfinder: ${err.message}. Make sure subfinder is installed.`,
});
});
});
}
