// Minimal 1x1 red pixel PNG (68 bytes)

static const unsigned char png[] = {

0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a, // PNG signature

0x00, 0x00, 0x00, 0x0d, 0x49, 0x48, 0x44, 0x52, // IHDR chunk

0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, // 1x1

0x08, 0x02, 0x00, 0x00, 0x00, 0x90, 0x77, 0x53, // 8-bit RGB

0xde, 0x00, 0x00, 0x00, 0x0c, 0x49, 0x44, 0x41, // IDAT chunk

0x54, 0x08, 0xd7, 0x63, 0xf8, 0xcf, 0xc0, 0x00, // compressed data

0x00, 0x00, 0x03, 0x00, 0x01, 0x36, 0x28, 0x19,

0x00, 0x00, 0x00, 0x00, 0x00, 0x49, 0x45, 0x4e, // IEND chunk

0x44, 0xae, 0x42, 0x60, 0x82

};

return std::string(reinterpret_cast<const char*>(png), sizeof(png));

public:

std::shared_ptr<httpserver::http_response> render_GET(const httpserver::http_request&) {

// Build binary content as a std::string. The string can contain any

// bytes — it is not limited to printable characters or null-terminated

// C strings. The size is tracked internally by std::string::size().

std::string image_data = generate_png_data();

// Use string_response with the appropriate content type. The response

// will send the exact bytes contained in the string.

return std::make_shared<httpserver::string_response>(

std::move(image_data), 200, "image/png");

}

httpserver::webserver ws = httpserver::create_webserver(8080);

image_resource ir;

ws.register_resource("/image", &ir);

ws.start(true);

return 0;