devs,
I'm looking for advice about how to properly clear a cookie value from the
current request so that it will be omitted
from the request when it goes upstream (to proxy). Here's the code I currently
have:
static ngx_str_t my_cookie_name = ngx_string("MyMagicCookieName");
ngx_uint_t i;
ngx_table_elt_t **h;
ngx_str_t null_header_value = ngx_null_string;
h = r->headers_in.cookies.elts;
for (i = 0; i < r->headers_in.cookies.nelts; i++) {
if (h[i]->value.len > my_cookie_name.len &&
0 == ngx_strncmp(h[i]->value.data, my_cookie_name.data,
my_cookie_name.len))
{
h[i]->value = null_header_value;
break;
}
}
my main concern is leaking memory -- will the nulling of this value cause
memory to be leaked? If so, how can I fix this?
A secondary concern is that I believe value can actually contain a list of
comma separated of cookie name/vals, although
I've not actually encountered that problem so far. What would be the right way
to wipe out only PART of the value data,
if that's indeed what I need to do?
Thanks,
Mike Ellery
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