使用方便的request.build_absolute_uri() 方法根据请求，将相对 url 传递给它，它会给你一个完整的.

Use handy request.build_absolute_uri() method on request, pass it the relative url and it'll give you full one.

默认情况下，返回的是 request.get_full_path() 的绝对 URL，但您可以将相对 URL 作为第一个参数传递给它，以将其转换为绝对 URL.

By default, the absolute URL for request.get_full_path() is returned, but you can pass it a relative URL as the first argument to convert it to an absolute URL.