IIS 搜索引擎优化和带有动态图像的规范 Url

Question

我的动态图像生成器出现以下错误。它可以有任何类型的宽度或高度，但 SEO 提示它，因为它需要一个规范的 URL。如何使用不是页面的动态图像执行此操作？

The page with URL "http://localhost/assets/images/99?w=125" can also be accessed by using URL "http://localhost/assets/images/99?w=100".
Search engines identify unique pages by using URLs.  When a single page can be accessed by using any one of multiple URLs, a search engine assumes that there are multiple unique pages. Use a single URL to reference a page to prevent dilution of page relevance. You can prevent dilution by following a standard URL format.

Answer 1

canonical URL 也可以在 HTTP header 中指定。参见 RFC 6596 , 第 4 节:

or alternatively, in the HTTP header field as specified in Section 5 of [RFC5988]:

Link: <http://www.example.com/page.php?item=purse>; rel="canonical"