title: insert <img> in html that is obtained through HTTP POST
body: <p>Suppose I need to call an RPC HTTP api that requires the client to HTTP POST (potentially with a file) a uri and on success results in a "Content-Type: image/png" binary. Is there any way I can do this within html/js and insert the png into the HTML document? Or will I need to provide a proxy service that supports HTTP GET?</p>