new file mode 100644
--- /dev/null
+++ b/src/http/ngx_http_headers.c
@@ -0,0 +1,100 @@
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+
+ngx_http_header_t  ngx_http_headers_in[] = {
+    { ngx_string("Host"), offsetof(ngx_http_headers_in_t, host) },
+    { ngx_string("Connection"), offsetof(ngx_http_headers_in_t, connection) },
+    { ngx_string("If-Modified-Since"),
+                         offsetof(ngx_http_headers_in_t, if_modified_since) },
+    { ngx_string("User-Agent"), offsetof(ngx_http_headers_in_t, user_agent) },
+
+    { ngx_string("Content-Length"),
+                            offsetof(ngx_http_headers_in_t, content_length) },
+    { ngx_string("Accept-Encoding"),
+                           offsetof(ngx_http_headers_in_t, accept_encoding) },
+    { ngx_string("Range"), offsetof(ngx_http_headers_in_t, range) },
+#if 0
+    { ngx_string("If-Range"), offsetof(ngx_http_headers_in_t, if_range) },
+#endif
+
+    { ngx_string("Keep-Alive"), offsetof(ngx_http_headers_in_t, keep_alive) },
+
+    { ngx_null_string, 0 }
+};
+
+
+ngx_http_header_t  ngx_http_headers_out[] = {
+    { ngx_string("Server"), offsetof(ngx_http_headers_out_t, server) },
+    { ngx_string("Date"), offsetof(ngx_http_headers_out_t, date) },
+    { ngx_string("Content-Type"),
+                             offsetof(ngx_http_headers_out_t, content_type) },
+    { ngx_string("Content-Length"),
+                           offsetof(ngx_http_headers_out_t, content_length) },
+    { ngx_string("Content-Encoding"),
+                         offsetof(ngx_http_headers_out_t, content_encoding) },
+    { ngx_string("Location"), offsetof(ngx_http_headers_out_t, location) },
+    { ngx_string("Last-Modified"),
+                            offsetof(ngx_http_headers_out_t, last_modified) },
+    { ngx_string("Accept-Ranges"),
+                            offsetof(ngx_http_headers_out_t, accept_ranges) },
+
+    { ngx_null_string, 0 }
+};
+
+
+ngx_table_elt_t *ngx_http_add_header(void *header,
+                                     ngx_http_header_t *http_headers)
+{
+    int               i, j, nelts;
+    char             *prev;
+    ngx_table_t      *headers;
+    ngx_table_elt_t  *h, *new;
+
+    headers = *(ngx_table_t **) header;
+
+    prev = headers->elts;
+    nelts = headers->nelts;
+
+    if (!(new = ngx_push_table(headers))) {
+        return NULL;
+    }
+
+    if (prev == headers->elts) {
+        return new;
+    }
+
+    /*
+     * When table is relocated we need to update pointers in r->headers_in,
+     * r->headers_out, etc.  However this relocation should be very rare
+     * because we preallocate enough space for the number of the real world
+     * HTTP headers.
+     */
+
+    ngx_log_error(NGX_LOG_ALERT, headers->pool->log, 0,
+                  "header table is small, %d elements", nelts);
+
+    h = headers->elts;
+    for (i = 0; i < nelts; i++) {
+        if (h[i].key.len == 0) {
+            continue;
+        }
+
+        for (j = 0; http_headers[j].name.len != 0; j++) {
+            if (http_headers[j].name.len != h[i].key.len) {
+                continue;
+            }
+
+            if (ngx_strcasecmp(http_headers[j].name.data, h[i].key.data) == 0) {
+                *((ngx_table_elt_t **)
+                      ((char *) header + http_headers[j].offset)) = &h[i];
+                break;
+            }
+        }
+    }
+
+    return new;
+}
+