diff --git a/src/demo/config b/src/demo/config
new file mode 100644
index 00000000..b63319de
--- /dev/null
+++ b/src/demo/config
@@ -0,0 +1,4 @@
+
+ngx_addon_name=ngx_http_demo_module
+NGX_ADDON_SRCS="$NGX_ADDON_SRCS $ngx_addon_dir/${ngx_addon_name}.c"
+HTTP_MODULES="$HTTP_MODULES $ngx_addon_name"
diff --git a/src/demo/ngx_http_demo_module.c b/src/demo/ngx_http_demo_module.c
new file mode 100644
index 00000000..1eb58167
--- /dev/null
+++ b/src/demo/ngx_http_demo_module.c
@@ -0,0 +1,89 @@
+#include <ngx_config.h>
+#include <ngx_core.h>
+#include <ngx_http.h>
+
+ngx_module_t ngx_http_demo_module;
+
+typedef struct {
+	ngx_str_t echo;
+} ngx_http_demo_loc_conf_t;
+
+ngx_int_t
+ngx_http_demo_handler(ngx_http_request_t *r) {
+	ngx_int_t rc = ngx_http_discard_request_body(r);
+	if (rc != NGX_OK) {
+		return rc;
+	}
+
+	ngx_http_demo_loc_conf_t *dlcf = ngx_http_get_module_loc_conf(r, ngx_http_demo_module);
+	ngx_str_t echo = dlcf->echo;
+
+	r->headers_out.status = NGX_HTTP_OK;
+	r->headers_out.content_length_n = echo.len;
+	rc = ngx_http_send_header(r);
+	if (rc != NGX_OK) {
+		return rc;
+	}
+
+	ngx_buf_t *buf = ngx_create_temp_buf(r->pool, echo.len);
+	ngx_memcpy(buf->pos, echo.data, echo.len);
+	buf->last = buf->pos+echo.len;
+	buf->last_buf = 1;
+	ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "what %d", buf->pos);
+	ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, "what %d", buf->last);
+
+	ngx_chain_t out = {buf, NULL};
+	return ngx_http_output_filter(r, &out);
+}
+
+static char*
+ngx_http_demo(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) {
+	ngx_http_core_loc_conf_t *clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
+	clcf->handler = ngx_http_demo_handler;
+
+	ngx_str_t *value = cf->args->elts;
+	ngx_http_demo_loc_conf_t *dlcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_demo_module);
+	dlcf->echo = value[1];
+	return NGX_CONF_OK;
+}
+void *
+ngx_http_demo_create_loc_conf(ngx_conf_t *cf) {
+	return ngx_palloc(cf->pool, sizeof(ngx_http_demo_loc_conf_t));
+}
+
+static ngx_command_t ngx_http_demo_commands[] = {
+	{
+		ngx_string("demo"),
+		NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
+		ngx_http_demo,
+		NGX_HTTP_LOC_CONF_OFFSET,
+		0, NULL,
+	},
+	ngx_null_command
+};
+
+static ngx_http_module_t ngx_http_demo_module_ctx = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&ngx_http_demo_create_loc_conf,
+	NULL
+};
+
+ngx_module_t ngx_http_demo_module = {
+	NGX_MODULE_V1,
+	&ngx_http_demo_module_ctx,
+	ngx_http_demo_commands,
+	NGX_HTTP_MODULE,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NGX_MODULE_V1_PADDING
+};