ngx.log after ngx.redirect

[fitstek]

Hi,

I was wondering if this is a bug or not. 

          set $x 'true';

          rewrite_by_lua '

            ngx.var.x = "false"

            ngx.log(ngx.NOTICE, "Value of x: ", ngx.var.x)

            ngx.redirect("http://redirectedurl.com", 301)

          ';

The above configuration works and I get the notice in my log. 

But when I move the redirect to the first line it stops working. Why is that?

          set $x 'true';

          rewrite_by_lua '

            ngx.redirect("http://redirectedurl.com", 301)

            ngx.var.x = "false"

            ngx.log(ngx.NOTICE, "Value of x: ", ngx.var.x)

          ';

[Hamish Forbes]

The docs explain this pretty clearly: https://github.com/openresty/lua-nginx-module#ngxredirect

Note that this method call terminates the processing of the current request and that it must be called before ngx.send_headers or explicit response body outputs by either ngx.print or ngx.say.

It is recommended that a coding style that combines this method call with the return statement, i.e., return ngx.redirect(...) be adopted when this method call is used in contexts other than header_filter_by_lua to reinforce the fact that the request processing is being terminated.

[Fitsum Teklehaimanot]

Thanks, must have completely skipped over that.

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