The reason of ignoring subrequest in access phase hander.

[洪志道]

Hi.

I'm wondering the reason of ignoring subrequests in access phase hander.
Can anyone explain it to me?

1069 ngx_int_t
1070 ngx_http_core_access_phase(ngx_http_request_t *r,
ngx_http_phase_handler_t *ph)
1071 {
1072     ngx_int_t                  rc;
1073     ngx_http_core_loc_conf_t  *clcf;
1074
1075     if (r != r->main) {
1076         r->phase_handler = ph->next;
1077         return NGX_AGAIN;
1078     }
1079

Thanks.
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