title: How to use TCP-based HTTP to download image?
body: <p>I got some images to download using HTTP. I got these images' URL, how to build the TCP-based HTTP buffer to download the image?</p>
  
  <p>I got no library in my current platform, the only supported language in this platform is C, so I have to build the HTTP buffer for these resources. </p>
  
  <p>Currently I have build the normal API request, they are all HTTP request, every request have 0  or more parameters. But the image request got only a URL, such as <strong>http://some-image.jpg</strong>, it seems just a <strong>download</strong> job, no API parameters, no authorization, it's simple, but how to construct the TCP request?</p>