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expires modified

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This commit is contained in:
Igor Sysoev 2008-05-16 15:18:50 +00:00
parent 69988d1162
commit f1e58930c8
1 changed files with 76 additions and 41 deletions
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91
src/http/modules/ngx_http_headers_filter_module.c
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@ -31,18 +31,20 @@ struct ngx_http_header_val_s {
};
#define NGX_HTTP_EXPIRES_OFF 0
#define NGX_HTTP_EXPIRES_EPOCH 1
#define NGX_HTTP_EXPIRES_MAX 2
#define NGX_HTTP_EXPIRES_ACCESS 3
#define NGX_HTTP_EXPIRES_MODIFIED 4
typedef struct {
time_t expires;
ngx_uint_t expires;
time_t expires_time;
ngx_array_t *headers;
} ngx_http_headers_conf_t;
#define NGX_HTTP_EXPIRES_UNSET -2147483647
#define NGX_HTTP_EXPIRES_OFF -2147483646
#define NGX_HTTP_EXPIRES_EPOCH -2147483645
#define NGX_HTTP_EXPIRES_MAX -2147483644
static ngx_int_t ngx_http_set_expires(ngx_http_request_t *r,
ngx_http_headers_conf_t *conf);
static ngx_int_t ngx_http_add_cache_control(ngx_http_request_t *r,
@ -76,7 +78,7 @@ static ngx_command_t ngx_http_headers_filter_commands[] = {
{ ngx_string("expires"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF
|NGX_CONF_TAKE1,
|NGX_CONF_TAKE12,
ngx_http_headers_expires,
NGX_HTTP_LOC_CONF_OFFSET,
0,
@ -185,6 +187,7 @@ static ngx_int_t
ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf)
{
size_t len;
time_t since;
ngx_uint_t i;
ngx_table_elt_t *expires, *cc, **ccp;
@ -266,7 +269,7 @@ ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf)
return NGX_ERROR;
}
if (conf->expires == 0) {
if (conf->expires_time == 0) {
ngx_memcpy(expires->value.data, ngx_cached_http_time.data,
ngx_cached_http_time.len + 1);
@ -276,9 +279,18 @@ ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf)
return NGX_OK;
}
ngx_http_time(expires->value.data, ngx_time() + conf->expires);
if (conf->expires == NGX_HTTP_EXPIRES_ACCESS
|| r->headers_out.last_modified_time == -1)
{
since = ngx_time();
if (conf->expires < 0) {
} else {
since = r->headers_out.last_modified_time;
}
ngx_http_time(expires->value.data, since + conf->expires_time);
if (conf->expires_time < 0) {
cc->value.len = sizeof("no-cache") - 1;
cc->value.data = (u_char *) "no-cache";
@ -291,7 +303,8 @@ ngx_http_set_expires(ngx_http_request_t *r, ngx_http_headers_conf_t *conf)
return NGX_ERROR;
}
cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T", conf->expires)
cc->value.len = ngx_sprintf(cc->value.data, "max-age=%T",
since + conf->expires_time - ngx_time())
- cc->value.data;
return NGX_OK;
@ -413,9 +426,10 @@ ngx_http_headers_create_conf(ngx_conf_t *cf)
* set by ngx_pcalloc():
*
* conf->headers = NULL;
* conf->expires_time = 0;
*/
conf->expires = NGX_HTTP_EXPIRES_UNSET;
conf->expires = NGX_CONF_UNSET_UINT;
return conf;
}
@ -427,9 +441,13 @@ ngx_http_headers_merge_conf(ngx_conf_t *cf, void *parent, void *child)
ngx_http_headers_conf_t *prev = parent;
ngx_http_headers_conf_t *conf = child;
if (conf->expires == NGX_HTTP_EXPIRES_UNSET) {
conf->expires = (prev->expires == NGX_HTTP_EXPIRES_UNSET) ?
NGX_HTTP_EXPIRES_OFF : prev->expires;
if (conf->expires == NGX_CONF_UNSET_UINT) {
conf->expires = prev->expires;
conf->expires_time = prev->expires_time;
if (conf->expires == NGX_CONF_UNSET_UINT) {
conf->expires = NGX_HTTP_EXPIRES_OFF;
}
}
if (conf->headers == NULL) {
@ -455,15 +473,17 @@ ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_http_headers_conf_t *hcf = conf;
ngx_uint_t minus;
ngx_uint_t minus, n;
ngx_str_t *value;
if (hcf->expires != NGX_HTTP_EXPIRES_UNSET) {
if (hcf->expires != NGX_CONF_UNSET_UINT) {
return "is duplicate";
}
value = cf->args->elts;
if (cf->args->nelts == 2) {
if (ngx_strcmp(value[1].data, "epoch") == 0) {
hcf->expires = NGX_HTTP_EXPIRES_EPOCH;
return NGX_CONF_OK;
@ -479,32 +499,47 @@ ngx_http_headers_expires(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
return NGX_CONF_OK;
}
if (value[1].data[0] == '+') {
value[1].data++;
value[1].len--;
hcf->expires = NGX_HTTP_EXPIRES_ACCESS;
n = 1;
} else { /* cf->args->nelts == 3 */
if (ngx_strcmp(value[1].data, "modified") != 0) {
return "invalid value";
}
hcf->expires = NGX_HTTP_EXPIRES_MODIFIED;
n = 2;
}
if (value[n].data[0] == '+') {
value[n].data++;
value[n].len--;
minus = 0;
} else if (value[1].data[0] == '-') {
value[1].data++;
value[1].len--;
} else if (value[n].data[0] == '-') {
value[n].data++;
value[n].len--;
minus = 1;
} else {
minus = 0;
}
hcf->expires = ngx_parse_time(&value[1], 1);
hcf->expires_time = ngx_parse_time(&value[n], 1);
if (hcf->expires == NGX_ERROR) {
if (hcf->expires_time == NGX_ERROR) {
return "invalid value";
}
if (hcf->expires == NGX_PARSE_LARGE_TIME) {
if (hcf->expires_time == NGX_PARSE_LARGE_TIME) {
return "value must be less than 68 years";
}
if (minus) {
hcf->expires = - hcf->expires;
hcf->expires_time = - hcf->expires_time;
}
return NGX_CONF_OK;