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diff src/http/ngx_http_core_module.c @ 6432:cf3e75cfa951

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Added variables support to server_tokens. It can now be set to "off" conditionally, e.g. using the map directive. An empty value will disable the emission of the Server: header and the signature in error messages generated by nginx. Any other value is treated as "on", meaning that full nginx version is emitted in the Server: header and error messages generated by nginx.
author Ruslan Ermilov <ru@nginx.com>
date Tue, 15 Mar 2016 13:36:19 +0300
parents cf5e822cf470
children fc72784b1f52
line wrap: on
line diff
--- a/src/http/ngx_http_core_module.c
+++ b/src/http/ngx_http_core_module.c
@@ -59,6 +59,8 @@ static char *ngx_http_core_set_aio(ngx_c
     void *conf);
 static char *ngx_http_core_directio(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf);
+static char *ngx_http_core_server_tokens(ngx_conf_t *cf, ngx_command_t *cmd,
+    void *conf);
 static char *ngx_http_core_error_page(ngx_conf_t *cf, ngx_command_t *cmd,
     void *conf);
 static char *ngx_http_core_try_files(ngx_conf_t *cf, ngx_command_t *cmd,
@@ -585,10 +587,10 @@ static ngx_command_t  ngx_http_core_comm
       NULL },
 
     { ngx_string("server_tokens"),
-      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
-      ngx_conf_set_flag_slot,
+      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
+      ngx_http_core_server_tokens,
       NGX_HTTP_LOC_CONF_OFFSET,
-      offsetof(ngx_http_core_loc_conf_t, server_tokens),
+      0,
       NULL },
 
     { ngx_string("if_modified_since"),
@@ -3635,9 +3637,9 @@ ngx_http_core_create_loc_conf(ngx_conf_t
     clcf->log_not_found = NGX_CONF_UNSET;
     clcf->log_subrequest = NGX_CONF_UNSET;
     clcf->recursive_error_pages = NGX_CONF_UNSET;
-    clcf->server_tokens = NGX_CONF_UNSET;
     clcf->chunked_transfer_encoding = NGX_CONF_UNSET;
     clcf->etag = NGX_CONF_UNSET;
+    clcf->server_tokens = NGX_CONF_UNSET_UINT;
     clcf->types_hash_max_size = NGX_CONF_UNSET_UINT;
     clcf->types_hash_bucket_size = NGX_CONF_UNSET_UINT;
 
@@ -3900,11 +3902,15 @@ ngx_http_core_merge_loc_conf(ngx_conf_t 
     ngx_conf_merge_value(conf->log_subrequest, prev->log_subrequest, 0);
     ngx_conf_merge_value(conf->recursive_error_pages,
                               prev->recursive_error_pages, 0);
-    ngx_conf_merge_value(conf->server_tokens, prev->server_tokens, 1);
     ngx_conf_merge_value(conf->chunked_transfer_encoding,
                               prev->chunked_transfer_encoding, 1);
     ngx_conf_merge_value(conf->etag, prev->etag, 1);
 
+    if (conf->server_tokens == NGX_CONF_UNSET_UINT) {
+        ngx_conf_merge_uint_value(conf->server_tokens, prev->server_tokens, 1);
+        conf->server_tokens_value = prev->server_tokens_value;
+    }
+
     ngx_conf_merge_ptr_value(conf->open_file_cache,
                               prev->open_file_cache, NULL);
 
@@ -4787,6 +4793,46 @@ ngx_http_core_directio(ngx_conf_t *cf, n
 
 
 static char *
+ngx_http_core_server_tokens(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+    ngx_http_core_loc_conf_t *clcf = conf;
+
+    ngx_str_t                         *value;
+    ngx_http_compile_complex_value_t   ccv;
+
+    if (clcf->server_tokens != NGX_CONF_UNSET_UINT) {
+        return "is duplicate";
+    }
+
+    value = cf->args->elts;
+
+    if (ngx_strcmp(value[1].data, "on") == 0) {
+        clcf->server_tokens = 1;
+        return NGX_CONF_OK;
+    }
+
+    if (ngx_strcmp(value[1].data, "off") == 0) {
+        clcf->server_tokens = 0;
+        return NGX_CONF_OK;
+    }
+
+    ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
+
+    ccv.cf = cf;
+    ccv.value = &value[1];
+    ccv.complex_value = &clcf->server_tokens_value;
+
+    if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
+        return NGX_CONF_ERROR;
+    }
+
+    clcf->server_tokens = 2;
+
+    return NGX_CONF_OK;
+}
+
+
+static char *
 ngx_http_core_error_page(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 {
     ngx_http_core_loc_conf_t *clcf = conf;