title: What does client send after receiving a "100 Continue" status code?
body: <p>Client sends a POST or PUT request that includes the header:</p>
  
  <pre><code>Expect: 100-continue
  </code></pre>
  
  <p>The server responds with the status code:</p>
  
  <pre><code>100 Continue
  </code></pre>
  
  <p>What does the client send now?  Does it send an entire request (the previously send request line and headers along with the previously NOT sent content)?  Or does it only send the content?</p>
  
  <p>I think it's the later, but I'm struggling to find concrete examples online.  Thanks.</p>