If the URI in a request does not match the URI of the requested resource on the origin server, you must overwrite the request URI with the resource URI. To rewrite URIs, you must create a rewrite rule. After Alibaba Cloud Content Delivery Network (CDN) receives a request, Alibaba Cloud CDN compares the request with the rewrite rule. If the request matches the rewrite rule, Alibaba Cloud CDN performs a 302 redirect to redirect the request to the destination URI.

Scenarios

If you want to rewrite URIs in requests to the URIs of the requested resources, you can create a rewrite rule. If a request matches the rewrite rule, Alibaba Cloud CDN performs a 302 redirect to redirect the request to the destination URI. For example, users visit www.example.com/hello over HTTP. After you create a rewrite rule, requests that are sent to www.example.com/hello are redirected to www.example.com/index.html.

Procedure

  1. Log on to the Alibaba Cloud CDN console.
  2. In the left-side navigation pane, click Domain Names.
  3. On the Domain Names page, find the domain name that you want to manage and click Manage in the Actions column of the domain name.
  4. In the management pane of the domain name, click Cache.
  5. Click the Rewrite tab.
  6. Click Create. In the Create Rewrite Rule dialog box, set the Original URI, Rewritten URI, and Flag parameters.
    Note
    • You can create at most 50 rewrite rules for each domain name.
    • You can use regular expressions to specify the original URI and rewritten URI. Do not use braces ({}) in the regular expressions. Regular expressions that contain braces ({}) do not take effect.
    Create a rewrite rule
    Parameter Description
    Original URI Enter a URI that starts with a forward slash (/). The URI cannot contain http:// or domain names. You can use a Perl-compatible regular expression (PCRE) to specify the URI, for example, ^/hello$.
    Rewritten URI Enter a URI that starts with a forward slash (/). The URI cannot contain http:// or domain names. Example: /index.html.
    Flag Redirect and Break are supported.
    • Redirect: If the URI in a request matches the current rule, Alibaba Cloud CDN performs a 302 redirect to redirect the request to the destination URI.
    • Break: If the URI in a request matches the current rule, Alibaba Cloud CDN does not rewrite the URI and ignores other rewrite rules.
  7. Click OK.

    After a rewrite rule is created, it is displayed on the Rewrite tab. You can Modify or Delete the rule.

Examples

Example Original URI Rewritten URI Flag Description
Example 1 /hello /index.html Redirect Requests are sent to www.domain.com/hello. CDN nodes perform a 302 redirect to redirect the requests to www.domain.com/index.html.
Example 2 ^/$ /index.html Redirect Requests are sent to www.domain.com. CDN nodes perform a 302 redirect to redirect the requests to www.domain.com/index.html.
Example 3 /hello /hello/index.html Redirect Requests are sent to www.domain.com/hello. CDN nodes perform a 302 redirect to redirect the requests to www.domain.com/hello/index.html.
Example 4 ^/hello$ /index.html Break Requests are sent to www.domain.com/hello. CDN nodes perform a 302 redirect to redirect the requests to www.domain.com/index.html and ignore other rewrite rules.

Related API operations

BatchSetCdnDomainConfig