N00b - "set" directive is not allowed here

[Joel Parker]

I have a set directive inside an http block which I thought was valid but
when I run config -t it says the nginx: [emerg] "set" directive is not
allowed here.


http {

    log_format bodylog '$remote_addr - $remote_user [$time_local] '
      '"$request" $status $body_bytes_sent '
      '"$http_referer" "$http_user_agent" $request_time '
      '<"$request_body" >"$resp_body"';

     lua_need_request_body on;

     *set $resp_body "";*
     body_filter_by_lua '
        local resp_body = ngx.arg[1]
        ngx.ctx.buffered = (ngx.ctx.buffered or "") .. resp_body
        if ngx.arg[2] then
           ngx.var.resp_body = ngx.ctx.buffered
        end
       ';

.....

Joel
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