Most examples of using ngx_http_read_client_request_body seem to be upstream modules which really doesn't apply to my situation. The DAV module does this at the end of the post_handler (ngx_http_dav_put_handler):

ngx_http_finalize_request(r, ngx_http_send_header(r)); return;

What is the correct thing to do at the end of the handler? I've tried both methods and neither seems to have any positive results.