This was actually one of the easier aspects to solve, the webcam server ran on a different port than your regular web server so it knew exactly what it was that you were going to request, it existed for one purpose only: to serve up those images. There was no HTML or other stuff to be confused with. Technically it was probably possible for a browser to re-use the same connection and to request say in index.html after requesting an image but in practice this simply never happened. After the first image request all the subsequent requests on that same socket would be image requests as well.