So is "rewrite_by_lua" also evil?

[agentzh]

On Sun, Oct 16, 2011 at 12:29 PM, agentzh <agentzh at gmail.com> wrote:
> You can now do what the "rewrite" directive does in pure Lua since the
> latest ngx_lua v0.3.1rc13 release.
>
> Your previous example
>
>    location @pretty_urls {
>             rewrite ^/sometext/xyz\.html$ /abc.html last;
>             rewrite_by_lua 'ngx.exec("@proxy");';
>    }
>
> can be rewritten as
>
>    location @pretty_urls {
>        rewrite_by_lua '
>            if ngx.var.uri == "/sometext/xyz.html" then
>                return ngx.req.set_uri("/abc.html")
>            end
>            ngx.exec("@proxy");
>        ';
>    }
>

Sorry, I've changed my mind and changed the ngx.req.set_uri() API a
bit in ngx_lua v0.3.1rc14. Now it's required to trigger location jump
explicitly and the above example should be rewritten as

    location @pretty_urls {
        rewrite_by_lua '
            if ngx.var.uri == "/sometext/xyz.html" then
                -- the following function never returns
                -- when the second ("jump") arg is true
                ngx.req.set_uri("/abc.html", true)
            end
            ngx.exec("@proxy");
        ';
    }

> See the documentation here for details:
> http://wiki.nginx.org/HttpLuaModule#ngx.req.set_uri
>

I've also updated the document accordingly. Sorry for the
inconvenience but I'd preserve the right to change APIs that haven't
been in any formal releases of my modules :)

Thanks!
-agentzh

P.S. ngx_lua v0.3.1rc14 has already been included in ngx_openresty
devel release 1.0.8.11: http://openresty.org/#Download