Browser Extension

chrome.webRequest.onBeforeSendHeaders.addListener(
  (details) => {
    const headers = {};
    for (const header of details.requestHeaders) {
      headers[header.name] = header.value;
    }
    capturedHeaders.set(details.url, {
      headers,
      timestamp: Date.now(),
    });
  },
  { urls: ["<all_urls>"] },
  ["requestHeaders", "extraHeaders"]
);

{
  "manifest_version": 3,
  "name": "Surge Download Manager",
  "version": "1.6.5",
  "description": "High-performance download acceleration with live progress tracking.",
  "permissions": ["downloads", "storage", "notifications", "webRequest"],
  "host_permissions": ["http://127.0.0.1/*", "<all_urls>"],
  "background": {
    "service_worker": "background.js"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  }
}

const DEFAULT_PORT = 1700;
const MAX_PORT_SCAN = 100;

for (let port = DEFAULT_PORT; port < DEFAULT_PORT + MAX_PORT_SCAN; port++) {
  const url = `http://127.0.0.1:${port}`;
  const response = await fetch(`${url}/health`, {
    signal: AbortSignal.timeout(200),
  });
  if (response.ok) {
    const data = await response.json();
    if (data.status === "ok") {
      return url;
    }
  }
}