Hi,

I also did these in my header_filter to make sure that the modified response is sent to the client with chunked encoding.

ngx_http_clear_content_length(r);
ngx_http_clear_accept_ranges(r);
ngx_http_clear_etag(r);

ngx_table_elt_t *header_entry = ngx_list_push(&r->headers_out.headers);
if (header_entry == NULL) {
return ngx_http_t1k_bot_rsp_body_next_header_filter(r);
}

header_entry->hash = 1;
header_entry->key.len = t1k_confuse_header_key.len;
header_entry->key.data = (u_char *)t1k_confuse_header_key.data;
header_entry->value.len = t1k_confuse_header_value.len;
header_entry->value.data = (u_char *)t1k_confuse_header_value.data;