--- nginx-0.1.41/src/http/modules/ngx_http_rewrite_module.c.orig	2005-07-07 17:20:46 +0400
+++ nginx-0.1.41/src/http/modules/ngx_http_rewrite_module.c	2005-08-18 00:50:24 +0400
@@ -189,6 +189,99 @@ ngx_http_rewrite_handler(ngx_http_reques
 
 
 static void
+ngx_http_rewrite_file_not_exists_code(ngx_http_script_engine_t *e)
+{
+    ngx_http_request_t           	*r;
+	ngx_http_core_loc_conf_t     *clcf;
+	ngx_file_info_t			fi;
+	ngx_str_t	              name;
+	u_char*			      last;
+
+	r = e->request;
+	clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
+	name.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len + 2);
+	if (name.data == NULL) {
+	    e->sp->value = 1;
+	    e->sp->text.len = 1;
+	    e->sp->text.data = (u_char *) "1";
+	    e->sp++;
+
+		return;
+	}
+
+	last = ngx_cpymem(name.data, clcf->root.data, clcf->root.len);
+	last = ngx_cpystrn(last, r->uri.data, r->uri.len + 1);
+
+	name.len = last - name.data;
+
+	if (ngx_file_info(name.data, &fi) == NGX_FILE_ERROR) {
+	    e->sp->value = 1;
+	    e->sp->text.len = 1;
+	    e->sp->text.data = (u_char *) "1";
+	    e->sp++;
+	}
+	else {
+	    e->sp->value = 0;
+	    e->sp->text.len = 0;
+	    e->sp->text.data = (u_char *) "";
+	    e->sp++;
+	}
+
+	ngx_pfree(r->pool, name.data);
+
+    e->ip += sizeof(uintptr_t);
+}
+
+
+static void
+ngx_http_rewrite_dir_not_exists_code(ngx_http_script_engine_t *e)
+{
+    ngx_http_request_t           	*r;
+	ngx_http_core_loc_conf_t     *clcf;
+	ngx_dir_t			dir;
+	ngx_str_t	              dname;
+	u_char			      *last;
+
+	r = e->request;
+	clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+
+	dname.data = ngx_palloc(r->pool, clcf->root.len + r->uri.len 
+							+ NGX_DIR_MASK_LEN);
+	if (dname.data == NULL) {
+	    e->sp->value = 1;
+	    e->sp->text.len = 1;
+	    e->sp->text.data = (u_char *) "1";
+	    e->sp++;
+
+		return;
+	}
+
+	last = ngx_cpymem(dname.data, clcf->root.data, clcf->root.len);
+	last = ngx_cpystrn(last, r->uri.data, r->uri.len + 1);
+
+	dname.len = last - dname.data;
+
+	if (ngx_open_dir(&dname, &dir) == NGX_FILE_ERROR) {
+	    e->sp->value = 1;
+	    e->sp->text.len = 1;
+	    e->sp->text.data = (u_char *) "1";
+	    e->sp++;
+	}
+	else {
+	    e->sp->value = 0;
+	    e->sp->text.len = 0;
+	    e->sp->text.data = (u_char *) "";
+	    e->sp++;
+	}
+
+	ngx_pfree(r->pool, dname.data);
+
+    e->ip += sizeof(uintptr_t);
+}
+
+
+static void
 ngx_http_rewrite_invalid_referer_code(ngx_http_script_engine_t *e)
 {
     u_char                       *ref;
@@ -892,6 +985,31 @@ ngx_http_rewrite_variable(ngx_conf_t *cf
 
         *code = ngx_http_rewrite_invalid_referer_code;
 
+    	} else if (value->len == sizeof("file_not_exists") - 1
+		&& ngx_strncmp(value->data, "file_not_exists",
+						sizeof("file_not_exists") - 1) == 0)
+	{
+        code = ngx_http_script_start_code(cf->pool, &lcf->codes,
+                                           sizeof(ngx_http_script_code_pt));
+
+        if (code == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+        *code = ngx_http_rewrite_file_not_exists_code;
+	
+	} else if (value->len == sizeof("dir_not_exists") - 1
+		&& ngx_strncmp(value->data, "dir_not_exists",
+						sizeof("dir_not_exists") - 1) == 0)
+	{
+        code = ngx_http_script_start_code(cf->pool, &lcf->codes,
+                                           sizeof(ngx_http_script_code_pt));
+        if (code == NULL) {
+            return NGX_CONF_ERROR;
+        }
+
+	*code = ngx_http_rewrite_dir_not_exists_code;
+
     } else {
         index = ngx_http_get_variable_index(cf, value);