qwzhou89 commented on issue #9818:
URL: https://github.com/apache/apisix/issues/9818#issuecomment-1634005763
> code sample(not test yet):
>
> ```
> local core = require("apisix.core");
> local b64 = require("ngx.base64");
> local splited_uris = core.utils.split_uri(ctx.var.upstream_uri);
> ctx.var.upstream_uri = table.concat(splited_uris,"", 1, #splited_uris - 1)
.. b64.encode_base64url(splited_uris[#splited_uris]);
> ```
这应该是可以的。另外也可以参考
apisix/plugins/proxy-rewrite.lua
的代码，把`proxy-rewrite`的`regex_uri`的逻辑在serverless-pre-function里面实现下也可以。
还有，不知道你使用的apisix版本是多少，2.15.3以上的话，应该可以更改插件的优先级，把serverless-pre-function放在"phase":
"rewrite"，并把他的优先级提高，让它先于proxy-rewrite执行，应该也可以
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