ngx_http_upstream_header_variable  322 http/ngx_http_upstream.h ngx_int_t ngx_http_upstream_header_variable(ngx_http_request_t *r,
ngx_http_upstream_header_variable  499 http/ngx_http_variables.c         if (ngx_http_upstream_header_variable(r, vv, (uintptr_t) name)
ngx_http_upstream_header_variable 1960 http/ngx_http_variables.c             v[i].get_handler = ngx_http_upstream_header_variable;