通过CLI下载完整网站及网站页面大小测量工具选型求助

Hey there! Let's tackle your two problems one by one—both are super common when dealing with site crawling and size auditing, so I feel your pain with those finicky curl/wget commands and inconsistent Lighthouse numbers.

1. CLI Tool to Download Entire Websites (No More Encoding Headaches) #

I totally get why wget and curl fell short here—they’re great for single requests, but handling modern encodings like brotli and recursively grabbing all linked resources (CSS, JS, images, etc.) gets messy fast. The best tool I’ve found for full site mirroring is httrack—it’s built specifically for this use case and handles encodings, redirects, and internal link rewrites automatically.

Here’s a go-to command to mirror a site properly:

httrack https://your-target-site.com -O ./local-site-mirror \
  --mirror \          # Enables full mirror mode (follows all internal links)
  --robots=0 \        # Optional: Skip robots.txt if you need unrestricted access
  --user-agent="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36" \
  --accept-encoding="gzip, br" \  # Explicitly request gzip/brotli compression
  --keep-alive        # Maintain persistent connections for faster crawling

Httrack will decompress gzip/brotli content on download, save every linked resource, and adjust internal URLs so your local mirror works offline. If you want to exclude certain file types (like large videos), just add --exclude=*.mp4 to the command.

2. Reliable Page Size Measurement (Matches Browser Network Panel) #

Lighthouse’s size metrics are optimized for performance scoring, which is why they don’t align perfectly with DevTools’ raw network data. If you want numbers that match exactly what you see in the Network tab, here are two solid options:

Option 1: Headless Chrome + Puppeteer (Full Resource Size Tracking) #

This method uses Chrome’s DevTools Protocol to capture every resource’s size as it loads—so it’s a 1:1 match with the Network panel. You’ll need Node.js for this, but it’s straightforward:

First install Puppeteer:

npm install puppeteer

Then create a script named measure-page-size.js:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  
  let totalSize = 0;
  // Track every successful response
  page.on('response', async (response) => {
    if (!response.ok() || response.url().startsWith('data:')) return;
    
    // Get size from Content-Length header if available
    const contentLength = response.headers()['content-length'];
    if (contentLength) {
      totalSize += parseInt(contentLength);
    } else {
      // For compressed content without Content-Length, use the raw buffer size
      const buffer = await response.buffer();
      totalSize += buffer.length;
    }
  });

  // Wait until network is idle (all resources loaded)
  await page.goto('https://your-target-site.com', { waitUntil: 'networkidle2' });
  console.log(`Total page size (matches Network Panel "Size" column): ${(totalSize / 1024 / 1024).toFixed(2)} MB`);
  
  await browser.close();
})();

Run it with:

node measure-page-size.js

If you want the uncompressed content size (matching the Network panel’s "Content" column), replace buffer.length with (await response.text()).length.

Option 2: Fixed curl Command (Single Page Only) #

If you just need the size of the main HTML file (not all resources), you can fix your curl command to handle gzip/brotli correctly. The issue with your previous attempts was likely missing the right headers or compression flags:

• Get compressed size (matches Network Panel’s "Size" for the HTML request):

curl -s -H "Accept-Encoding: gzip, br" https://example.com | wc -c

• Get uncompressed size (matches Network Panel’s "Content" column):

curl -s -H "Accept-Encoding: gzip, br" https://example.com --compressed | wc -c

Just note this only measures the HTML file—use Puppeteer if you need the full page + resource size.

内容的提问来源于stack exchange，提问作者Mascarpone