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Referer: fixed $invalid_referer.

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The variable was considered non-existent in the absence of any
valid_referers directives.

Given the following config snippet,

    location / {
        return 200 $invalid_referer;
    }

    location /referer {
        valid_referers server_names;
    }

"location /" should work identically and independently on other
"location /referer".

The fix is to always add the $invalid_referer variable as long
as the module is compiled in, as is done by other modules.
This commit is contained in:
Ruslan Ermilov 2017-08-04 08:01:55 +03:00
parent d846f27638
commit c09bba400d
1 changed files with 25 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
src/http/modules/ngx_http_referer_module.c
View File

@ -32,6 +32,7 @@ typedef struct {
} ngx_http_referer_conf_t;
static ngx_int_t ngx_http_referer_add_variables(ngx_conf_t *cf);
static void * ngx_http_referer_create_conf(ngx_conf_t *cf);
static char * ngx_http_referer_merge_conf(ngx_conf_t *cf, void *parent,
void *child);
@ -77,7 +78,7 @@ static ngx_command_t ngx_http_referer_commands[] = {
static ngx_http_module_t ngx_http_referer_module_ctx = {
NULL, /* preconfiguration */
ngx_http_referer_add_variables, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
@ -107,6 +108,9 @@ ngx_module_t ngx_http_referer_module = {
};
static ngx_str_t ngx_http_invalid_referer_name = ngx_string("invalid_referer");
static ngx_int_t
ngx_http_referer_variable(ngx_http_request_t *r, ngx_http_variable_value_t *v,
uintptr_t data)
@ -263,6 +267,23 @@ valid:
}
static ngx_int_t
ngx_http_referer_add_variables(ngx_conf_t *cf)
{
ngx_http_variable_t *var;
var = ngx_http_add_variable(cf, &ngx_http_invalid_referer_name,
NGX_HTTP_VAR_CHANGEABLE);
if (var == NULL) {
return NGX_ERROR;
}
var->get_handler = ngx_http_referer_variable;
return NGX_OK;
}
static void *
ngx_http_referer_create_conf(ngx_conf_t *cf)
{
@ -452,19 +473,9 @@ ngx_http_valid_referers(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_referer_conf_t *rlcf = conf;
u_char *p;
ngx_str_t *value, uri, name;
ngx_uint_t i;
ngx_http_variable_t *var;
ngx_str_set(&name, "invalid_referer");
var = ngx_http_add_variable(cf, &name, NGX_HTTP_VAR_CHANGEABLE);
if (var == NULL) {
return NGX_CONF_ERROR;
}
var->get_handler = ngx_http_referer_variable;
u_char *p;
ngx_str_t *value, uri;
ngx_uint_t i;
if (rlcf->keys == NULL) {
rlcf->keys = ngx_pcalloc(cf->temp_pool, sizeof(ngx_hash_keys_arrays_t));