passing value from inside lua to outside nginx is empty

ronneilcamara · 2018-02-11T17:52:29+00:00

I was able to fix this.On Saturday, February 10, 2018 at 8:47:02 PM UTC-6, Ronneil Camara wrote:I tried lua-resty-string today - https://github.com/open...

passing value from inside lua to outside nginx is empty

ronneilcamara

set $some_var "";

location /test {

content_by_lua_block {

ngx.var.some_var = "somestring"

}

return 200 $some_var;

}

When I visit on my browser, the value is still empty and not "somestring".

ronneilcamara

I fixed this. Some docs are wrong. I got it to work by moving set command inside location. I have no idea why it works now. Once I move it outside again, it becomes empty again.

On Sunday, February 11, 2018 at 3:52:29 AM UTC-6, Ronneil Camara wrote:

set $some_var "";

location /test {
content_by_lua_block {
ngx.var.some_var = "somestring"
}
return 200 $some_var;
}

When I visit on my browser, the value is still empty and not "somestring".

zchao1995

Hi!

The directive return works on the rewrite phase prior the content_by_lua_block which works on the content phase, so the code inside content_by_lua_block cannot be run. Instead, you may implements this just use the rewrite_by_lua_block, like

rewrite_by_lua_block{
    ngx.var.some_var = "somestring"
    ngx.print(ngx.var.some_var)
    return ngx.exit(200)
}

This code is just for reference only.