Why Can't I set cookies in lua directive?

llaoolee · 2018-07-09T12:33:43+00:00

Hi Bruce,I will take a look at it this morning and let you know, seems promising.ErickAm Donnerstag, 5. Juli 2018 20:15:59 UTC-4 schrieb Bruce Wang:Hi Erick,...

Why Can't I set cookies in lua directive?

llaoolee

I can add cookies by doing: add_header Set-Cookie 'mycookie=123';

then read and check if it exists by doing: ngx.var.cookie_mycookie

However I can't do this e.g.

location /test {

content_by_lua_block {

ngx.header['Set-Cookie'] = 'mycookie=123; path=/'

ngx.say(ngx.var.cookie_mycookie)

}

The output value is simply nil. I also tried output whole request header, and the cookie is not even there.

I checked so no other header is sent before, and it's all clean, and no proxies. Using newest OpenResty version. Default.

Any idea? Thanks.

llaoolee

Oh and typo in above text: path is set to path=/ in cookie I did try put it on location / main directive which I suppose is right and also location /test with path=/test but none of them worked.

zchao1995

Hello!

You may mix up the means of variable $cookie_*, the variable value is fetched from the HTTP request header Cookie rather than the HTTP response header Set-Cookie.

llaoolee

Thanks! You were definately right. I mixed them up! Ty. I get it now, you can't also read from cookie_* from same page when using ngx.header['Set-Cookie'] but from a different page you can read it because it's in the request header after. When reading from response I simply could read the values from ngx.resp.get_headers() on the page it was from, anyway Problem Solved. Thanks alot.