title: How can we use electron.protocol.interceptFileProtocol with only certain paths, leaving other requests untouched?
body: <p>I'd like to intercept certain HTTP requests and replace them with files. So I thought I could use <code>electron.protocol.interceptFileProtocol</code> like so:</p>
  
  <pre class="lang-js prettyprint-override"><code>protocol.interceptFileProtocol('http', (request, callback) =&gt; {
    // intercept only requests to "http://example.com"
    if (request.url.startsWith("http://example.com")) {
      callback("/path/to/file")
    }
  
    // otherwise, let the HTTP request behave like normal.
    // But how?
  })
  </code></pre>
  
  <p>How do we allow other <code>http</code> requests other than <code>http://example.com</code> to continue working as normal?</p>