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$random_index variable

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This commit is contained in:
Igor Sysoev 2008-09-27 11:48:28 +00:00
parent e5a30cb6a9
commit 0100cbc5f3
1 changed files with 57 additions and 2 deletions
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59
src/http/modules/ngx_http_random_index_module.c
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@ -19,10 +19,11 @@ typedef struct {
static ngx_int_t ngx_http_random_index_error(ngx_http_request_t *r, static ngx_int_t ngx_http_random_index_error(ngx_http_request_t *r,
ngx_dir_t *dir, ngx_str_t *name); ngx_dir_t *dir, ngx_str_t *name);
static ngx_int_t ngx_http_random_index_init(ngx_conf_t *cf);
static void *ngx_http_random_index_create_loc_conf(ngx_conf_t *cf); static void *ngx_http_random_index_create_loc_conf(ngx_conf_t *cf);
static char *ngx_http_random_index_merge_loc_conf(ngx_conf_t *cf, static char *ngx_http_random_index_merge_loc_conf(ngx_conf_t *cf,
void *parent, void *child); void *parent, void *child);
static ngx_int_t ngx_http_random_index_add_variable(ngx_conf_t *cf);
static ngx_int_t ngx_http_random_index_init(ngx_conf_t *cf);
static ngx_command_t ngx_http_random_index_commands[] = { static ngx_command_t ngx_http_random_index_commands[] = {
@ -39,7 +40,7 @@ static ngx_command_t ngx_http_random_index_commands[] = {
static ngx_http_module_t ngx_http_random_index_module_ctx = { static ngx_http_module_t ngx_http_random_index_module_ctx = {
NULL, /* preconfiguration */ ngx_http_random_index_add_variable, /* preconfiguration */
ngx_http_random_index_init, /* postconfiguration */ ngx_http_random_index_init, /* postconfiguration */
NULL, /* create main configuration */ NULL, /* create main configuration */
@ -69,6 +70,10 @@ ngx_module_t ngx_http_random_index_module = {
}; };
static ngx_str_t ngx_http_random_index = ngx_string("random_index");
static ngx_int_t ngx_random_index_variable_index;
static ngx_int_t static ngx_int_t
ngx_http_random_index_handler(ngx_http_request_t *r) ngx_http_random_index_handler(ngx_http_request_t *r)
{ {
@ -80,6 +85,7 @@ ngx_http_random_index_handler(ngx_http_request_t *r)
ngx_dir_t dir; ngx_dir_t dir;
ngx_uint_t n, level; ngx_uint_t n, level;
ngx_array_t names; ngx_array_t names;
ngx_http_variable_value_t *v;
ngx_http_random_index_loc_conf_t *rlcf; ngx_http_random_index_loc_conf_t *rlcf;
if (r->uri.data[r->uri.len - 1] != '/') { if (r->uri.data[r->uri.len - 1] != '/') {
@ -257,6 +263,14 @@ ngx_http_random_index_handler(ngx_http_request_t *r)
last = ngx_copy(uri.data, r->uri.data, r->uri.len); last = ngx_copy(uri.data, r->uri.data, r->uri.len);
ngx_memcpy(last, name[n].data, name[n].len); ngx_memcpy(last, name[n].data, name[n].len);
v = &r->variables[ngx_random_index_variable_index];
v->len = name[n].len;
v->valid = 1;
v->no_cacheable = 0;
v->not_found = 0;
v->data = name[n].data;
return ngx_http_internal_redirect(r, &uri, &r->args); return ngx_http_internal_redirect(r, &uri, &r->args);
} }
@ -274,6 +288,22 @@ ngx_http_random_index_error(ngx_http_request_t *r, ngx_dir_t *dir,
} }
static ngx_int_t
ngx_http_random_index_variable(ngx_http_request_t *r,
ngx_http_variable_value_t *v, uintptr_t data)
{
/*
* the "random_index" directive stores index file name directly inside
* r->variables[] because request context is not preserved while
* an internal redirection
*/
v->not_found = 1;
return NGX_OK;
}
static void * static void *
ngx_http_random_index_create_loc_conf(ngx_conf_t *cf) ngx_http_random_index_create_loc_conf(ngx_conf_t *cf)
{ {
@ -302,6 +332,31 @@ ngx_http_random_index_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
} }
static ngx_int_t
ngx_http_random_index_add_variable(ngx_conf_t *cf)
{
ngx_int_t index;
ngx_http_variable_t *var;
var = ngx_http_add_variable(cf, &ngx_http_random_index,
NGX_HTTP_VAR_NOHASH);
if (var == NULL) {
return NGX_ERROR;
}
index = ngx_http_get_variable_index(cf, &ngx_http_random_index);
if (index == NGX_ERROR) {
return NGX_ERROR;
}
ngx_random_index_variable_index = index;
var->get_handler = ngx_http_random_index_variable;
return NGX_OK;
}
static ngx_int_t static ngx_int_t
ngx_http_random_index_init(ngx_conf_t *cf) ngx_http_random_index_init(ngx_conf_t *cf)
{ {