new file mode 100644
--- /dev/null
+++ b/src/http/modules/ngx_http_ssi_filter_module.h
@@ -0,0 +1,90 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_HTTP_SSI_FILTER_H_INCLUDED_
+#define _NGX_HTTP_SSI_FILTER_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+
+#define NGX_HTTP_SSI_MAX_PARAMS     16
+
+#define NGX_HTTP_SSI_COMMAND_LEN    31
+#define NGX_HTTP_SSI_PARAM_LEN      31
+#define NGX_HTTP_SSI_PARAMS_N       4
+
+
+typedef struct {
+    ngx_hash_t                hash;
+    ngx_hash_keys_arrays_t    commands;
+} ngx_http_ssi_main_conf_t;
+
+
+typedef struct {
+    ngx_buf_t                *buf;
+
+    u_char                   *pos;
+    u_char                   *copy_start;
+    u_char                   *copy_end;
+
+    ngx_uint_t                key;
+    ngx_str_t                 command;
+    ngx_array_t               params;
+    ngx_table_elt_t          *param;
+    ngx_table_elt_t           params_array[NGX_HTTP_SSI_PARAMS_N];
+
+    ngx_chain_t              *in;
+    ngx_chain_t              *out;
+    ngx_chain_t             **last_out;
+    ngx_chain_t              *busy;
+    ngx_chain_t              *free;
+
+    ngx_uint_t                state;
+    ngx_uint_t                saved_state;
+    size_t                    saved;
+    size_t                    looked;
+
+    size_t                    value_len;
+
+    ngx_array_t               variables;
+
+    ngx_uint_t                output;        /* unsigned  output:1; */
+
+    ngx_str_t                 timefmt;
+    ngx_str_t                 errmsg;
+} ngx_http_ssi_ctx_t;
+
+
+typedef ngx_int_t (*ngx_http_ssi_command_pt) (ngx_http_request_t *r,
+    ngx_http_ssi_ctx_t *ctx, ngx_str_t **);
+
+
+typedef struct {
+    ngx_str_t                 name;
+    ngx_uint_t                index;
+
+    unsigned                  mandatory:1;
+    unsigned                  multiple:1;
+} ngx_http_ssi_param_t;
+
+
+typedef struct {
+    ngx_str_t                 name;
+    ngx_http_ssi_command_pt   handler;
+    ngx_http_ssi_param_t     *params;
+
+    unsigned                  conditional:1;
+    unsigned                  flush:1;
+} ngx_http_ssi_command_t;
+
+
+extern ngx_module_t  ngx_http_ssi_filter_module;
+
+
+#endif /* _NGX_HTTP_SSI_FILTER_H_INCLUDED_ */