script.js

let cfIPv4 = []
let cfIPv4ToScan = []
const noOfEachRange24 = 30
const client = new XMLHttpRequest();
client.open('GET', 'https://raw.githubusercontent.com/vfarid/cf-ip-scanner/main/ipv4.txt');
client.onreadystatechange = function() {
  cfIPv4 = client.responseText.split("\n").map((cidr) => cidr.trim()).filter((cidr) => isCIDR(cidr));
  document.getElementById('btn-start').disabled = false;
  const tbody = document.getElementById('ip-ranges-body');
  cfIPv4.forEach((cidr) => {
    const row = tbody.insertRow();
    const cell = row.insertCell();
    cell.appendChild(document.createTextNode(cidr));
  })
}
client.send();

let maxIP;
let testNo;
let validIPs;
let maxLatency;
let numberOfWorkingIPs;
let ipRegex;
let immediateStop = false;
let progressBar = document.getElementById('progress-bar');
let progress = 0;
let portNo = 443;
let protocol = "https";
let language = localStorage.getItem('lang') || 'fa'

document.getElementById('max-ip').value = localStorage.getItem('max-ip') || 10;
document.getElementById('max-latency').value = localStorage.getItem('max-latency') || 600;
document.getElementById('ip-regex').value = localStorage.getItem('ip-regex');
document.getElementById('ip-include').value = localStorage.getItem('ip-include');
document.getElementById('ip-exclude').value = localStorage.getItem('ip-exclude');
document.getElementById('protocol').value = localStorage.getItem('protocol') || "https";
setLang(language);
setProtocol();

function setProtocol() {
  const ports = {
    http : ["80",  "8080", "2052", "2082", "2086", "2095"],
    https: ["443", "8443", "2053", "2083", "2087", "2096"],
  };

  portNo = document.getElementById('port-no').value || localStorage.getItem('port-no');
  document.getElementById('port-no').innerHTML = "";
  if (document.getElementById('protocol').value == 'http') {
    for(let port of ports.http) {
      document.getElementById('port-no').options.add(new Option(port))
    }
    if (ports.http.indexOf(portNo) < 0 && ports.https.indexOf(portNo) >= 0) {
      portNo = ports.http[ports.https.indexOf(portNo)];
    }
    if (!portNo) {
      portNo = ports.http[0]
    }
  } else {
    for(let port of ports.https) {
      document.getElementById('port-no').options.add(new Option(port))
    }
    if (ports.https.indexOf(portNo) < 0 && ports.http.indexOf(portNo) >= 0) {
      portNo = ports.https[ports.http.indexOf(portNo)];
    }
    if (!portNo) {
      portNo = ports.https[0]
    }
  }
  setTimeout(() => {document.getElementById('port-no').value = portNo}, 1);
}

function resetDefaults() {
  localStorage.removeItem('max-ip');
  localStorage.removeItem('max-latency');
  localStorage.removeItem('ip-regex');
  localStorage.removeItem('ip-include');
  localStorage.removeItem('ip-exclude');
  localStorage.removeItem('port-no');
  localStorage.removeItem('protocol');
  document.location = document.location;
}

function setLang(lang) {
  if (lang == 'fa') {
    document.getElementById('body').style.direction = 'rtl';
  } else {
    document.getElementById('body').style.direction = 'ltr';
  }
  let elements = document.getElementsByClassName('btn-lang');
  [].forEach.call(elements, (el) => {
    el.classList.remove('btn-primary')
    el.classList.add('btn-outline-primary')
  })
  document.getElementById('btn-' + lang).classList.remove('btn-outline-primary')
  document.getElementById('btn-' + lang).classList.add('btn-primary')
  elements = document.getElementsByClassName('lang-field');
  [].forEach.call(elements, (el) => {
    el.style.display = 'none';
  })
  elements = document.getElementsByClassName('lang-' + lang);
  [].forEach.call(elements, (el) => {
    el.style.display = 'inline';
  })
  localStorage.setItem('lang', lang);
  language = lang;
}

document.getElementById('btn-en').onclick = () => {
  setLang('en')
}
document.getElementById('btn-fa').onclick = () => {
  setLang('fa')
}
document.getElementById('btn-cn').onclick = () => {
  setLang('cn')
}
document.getElementById('protocol').onchange = () => {
  setProtocol()
}

function cancelScan() {
  immediateStop = true;
  document.getElementById('btn-start').disabled = false;
  document.getElementById('max-ip').disabled = false;
  document.getElementById('max-latency').disabled = false;
  document.getElementById('ip-regex').disabled = false;
  document.getElementById('ip-include').disabled = false;
  document.getElementById('ip-exclude').disabled = false;
  document.getElementById('port-no').disabled = false;
  document.getElementById('protocol').disabled = false;
  document.getElementById('btn-cancel').classList.add('d-none');
  document.getElementById('btn-start').classList.remove('d-none');
  document.getElementById('btn-reset').classList.remove('d-none');
}

let ips = [];

function startScan() {
  maxIP = ~~document.getElementById('max-ip').value;
  maxLatency = ~~document.getElementById('max-latency').value;
  ipRegex = document.getElementById('ip-regex').value;
  ipInclude = document.getElementById('ip-include').value;
  ipExclude = document.getElementById('ip-exclude').value;
  portNo = document.getElementById('port-no').value;
  protocol = document.getElementById('protocol').value;

  localStorage.setItem('max-ip', maxIP);
  localStorage.setItem('max-latency', maxLatency);
  localStorage.setItem('ip-regex', ipRegex);
  localStorage.setItem('ip-include', ipInclude);
  localStorage.setItem('ip-exclude', ipExclude);
  localStorage.setItem('port-no', portNo);
  localStorage.setItem('protocol', protocol);

  testNo = 0;
  numberOfWorkingIPs = 0;
  validIPs = [];
  document.getElementById('result').innerHTML = '';
  document.getElementById('btn-start').disabled = true;
  document.getElementById('max-ip').disabled = true;
  document.getElementById('max-latency').disabled = true;
  document.getElementById('ip-regex').disabled = true;
  document.getElementById('ip-include').disabled = true;
  document.getElementById('ip-exclude').disabled = true;
  document.getElementById('port-no').disabled = true;
  document.getElementById('protocol').disabled = true;
  document.getElementById('test-no').innerText = '';
  document.getElementById('btn-cancel').classList.remove('d-none');
  document.getElementById('btn-start').classList.add('d-none');
  document.getElementById('btn-reset').classList.add('d-none');

  setTimeout(() => {
    let ips = processIPs()
    ips = randomizeElements(ips)
    testIPs(ips);
  }, 50)
}

function processIPs() {
  let ips = [];
  let regex = null;
  let excludeRegex = null;
  if (ipRegex) {
    regex = new RegExp(ipRegex);
  }
  if (ipInclude) {
    cfIPv4ToScan = makeCIDR(ipInclude);
  } else {
    cfIPv4ToScan = [...cfIPv4];
  }
  if (ipExclude) {
    excludeRegex = new RegExp(
      ipExclude.split(',').map(c => {return '^' + c.replaceAll('.', '\\.').replaceAll('/', '\\/')}).join('|')
    );
  }

  for (const cidr of cfIPv4ToScan) {
    if (regex && !regex.test(cidr)) {
      continue;
    }
    if (excludeRegex && excludeRegex.test(cidr)) {
      continue;
    }
    ips = ips.concat(cidrToRandomIPArray(cidr));
  }
  return ips
}

async function testIPs(ipList) {
  for (const ip of ipList) {
    if (immediateStop) {
      break;
    }
    testNo++;
    let testResult = 0;
    let url = `${protocol}://${ip}:${portNo}/cdn-cgi/trace`;

    const startTime = performance.now();
    const controller = new AbortController();
    const multiply = maxLatency <= 500 ? 1.5 : (maxLatency <= 1000 ? 1.2 : 1);
    let timeout = 1.5 * multiply * maxLatency;
    let chNo = 0;
    for (const ch of ['', '|', '/', '-', '\\']) {
      const timeoutId = setTimeout(() => {
        controller.abort();
      }, timeout);
      if (ch) {
        timeout = 1 * multiply * maxLatency;
        document.getElementById('test-no').innerText = `#${testNo}:`;
        document.getElementById('ip-no').innerText = ip;
        document.getElementById('ip-no').style = `color: green`;
        document.getElementById('ip-try').innerText = ch;
        document.getElementById('ip-latency').innerText = Math.floor((performance.now() - startTime) / chNo) + 'ms';
      } else {
        timeout = 1.2 * multiply * maxLatency;
        document.getElementById('test-no').innerText = `#${testNo}:`;
        document.getElementById('ip-no').innerText = ip;
        document.getElementById('ip-no').style = `color: red`;
        document.getElementById('ip-try').innerText = '';
        document.getElementById('ip-latency').innerText = '';
      }
      try {
        const response = await fetch(url, {
          signal: controller.signal,
        });
        console.log(`${ip}   ${ch}   OK`)
        testResult++;
      } catch (error) {
        console.log(`${ip}   ${ch}   Fail`, error.name)
        if (!["AbortError", "TypeError"].includes(error.name)) {
          testResult++;
        }
      }
      clearTimeout(timeoutId);
      chNo++;
    }

    const latency = Math.floor((performance.now() - startTime) / 5);
    console.log(testResult, latency, maxLatency)
    if (testResult >= 3 && latency <= maxLatency) {
      numberOfWorkingIPs++;
      validIPs.push({ip: ip, latency: latency});
      const sortedArr = validIPs.sort((a, b) => a.latency - b.latency);
      const tableRows = sortedArr.map(obj => `
        <tr>
          <td></td>
          <td>${obj.ip}</td>
          <td>${obj.latency}ms</td>
          <td>
          <button class="btn btn-outline-secondary btn-sm" onclick="copyToClipboard('${obj.ip}')"><img height="16px" src="assets/icon-copy.png" /></button>
          </td>
        </tr>`).join('\n');
      document.getElementById('result').innerHTML = tableRows;
    }

    if (numberOfWorkingIPs >= maxIP) {
      break;
    }
  }

  document.getElementById('ip-no').innerText = '';
  document.getElementById('ip-try').innerText = '';
  document.getElementById('ip-latency').innerText = '';
  document.getElementById('btn-start').disabled = false;
  document.getElementById('max-ip').disabled = false;
  document.getElementById('max-latency').disabled = false;
  document.getElementById('ip-regex').disabled = false;
  document.getElementById('ip-include').disabled = false;
  document.getElementById('ip-exclude').disabled = false;
  document.getElementById('port-no').disabled = false;
  document.getElementById('protocol').disabled = false;
  document.getElementById('btn-cancel').classList.add('d-none');
  document.getElementById('btn-start').classList.remove('d-none');
  document.getElementById('btn-reset').classList.remove('d-none');

  if (immediateStop) {
    immediateStop = false;
    document.getElementById('test-no').innerHTML = `
      <span class="lang-field lang-fa text-danger fw-bold">لغو شد!</span>
      <span class="lang-field lang-en text-danger fw-bold">Canceled!</span>  
      <span class="lang-field lang-cn text-danger fw-bold">已取消！</span>  
    `;
  } else {
    if (window.self !== window.top) {
      window.top.postMessage({cleanIPs: validIPs.map(el => el.ip).join('\n')}, '*');
    }

    document.getElementById('test-no').innerHTML = `
      <span class="lang-field lang-fa text-success fw-bold">تمام شد.</span>
      <span class="lang-field lang-en text-success fw-bold">Done.</span>  
      <span class="lang-field lang-cn text-success fw-bold">完成</span>  
    `;
  }
  setLang(language)
}

function copyToClipboard(ip) {
  window.navigator.clipboard.writeText(ip).then(() => {
    alert('آی‌پی‌ در کلیپ‌بورد کپی شد.');
  }).catch(() => {
    alert('مشکلی پیش آمده است!');
  });
}

function copyAllToClipboard(ip) {
  const txt = validIPs.map(el => el.ip).join('\n');
  copyToClipboard(txt)
}

function isCIDR(cidr) {
  return cidr.match(/^([0-9]{1,3}\.){3}[0-9]{1,3}\/(16|17|18|19|20|21|22|23|24)$/g);
}

function makeCIDR(includeStr) {
  let includeList = includeStr.split(',').map((cidr) => cidr.trim());
  cidrList = includeList.flatMap((cidr) => {
    if (isCIDR(cidr)) {
      return [cidr];
    } else if (cidr) {
      const regex = new RegExp(
        '^' + cidr.replaceAll('.', '\\.').replaceAll('/', '\\/')
      );
      return cfIPv4.filter((cidr) => cidr.match(regex));
    } else {
      return [];
    }
  })
  return cidrList;
}

function generateRandomNumbers(count) {
  const numbers = [];
  while (numbers.length < count) {
    const randomNumber = Math.floor(Math.random() * 254) + 1;
    if (!numbers.includes(randomNumber)) {
      numbers.push(randomNumber);
    }
  }
  return numbers;
}

function splitCIDRTo24Ranges(cidr) {
  const [baseIP, baseMask] = cidr.split('/');
  const baseStart = baseIP.split('.').reduce((acc, octet) => (acc << 8) | parseInt(octet, 10), 0) >>> 0;
  const baseEnd = (baseStart | (0xffffffff >>> parseInt(baseMask, 10))) >>> 0;

  const ranges = [];
  let currentStart = baseStart;

  while (currentStart <= baseEnd) {
    ranges.push(currentStart);
    currentStart += 0x100;
  }

  return ranges
}


function cidrToRandomIPArray(cidr, count) {
  const ranges = splitCIDRTo24Ranges(cidr);
  const ips = [];
  for (const start of ranges) {
    const prefix = `${(start >>> 24) & 0xff}.${(start >>> 16) & 0xff}.${(start >>> 8) & 0xff}`;
    for (const no of generateRandomNumbers(noOfEachRange24)) {
      ips.push(prefix + '.' + no);
    }
  }
  return ips;
}

function randomizeElements(arr) {
  return [...arr].sort(() => {return 0.5 - Math.random()});
}

function downloadAsCSV() {
  const csvString = validIPs.map(el => el.ip).join('\n');
  const blob = new Blob([csvString], { type: 'text/csv;charset=utf-8;' });
  const url = URL.createObjectURL(blob);
  const link = document.createElement('a');
  link.setAttribute('href', url);
  link.setAttribute('download', 'ip-list.csv');
  link.style.display = 'none';
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
}

function downloadAsJSON() {
  const jsonString = JSON.stringify(validIPs.map(el => el.ip), null, 2);
  const blob = new Blob([jsonString], { type: 'application/json;charset=utf-8;' });
  const url = URL.createObjectURL(blob);
  const link = document.createElement('a');
  link.setAttribute('href', url);
  link.setAttribute('download', 'ip-list.json');
  link.style.display = 'none';
  document.body.appendChild(link);
  link.click();
  document.body.removeChild(link);
}