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support Cache-Control no-cache and max-age in cache

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This commit is contained in:
Igor Sysoev 2009-04-04 17:35:40 +00:00
parent a514d68bfb
commit 21a3c66a87
1 changed files with 57 additions and 11 deletions
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68
src/http/ngx_http_upstream.c
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@ -70,7 +70,7 @@ static void ngx_http_upstream_finalize_request(ngx_http_request_t *r,
static ngx_int_t ngx_http_upstream_process_header_line(ngx_http_request_t *r,
ngx_table_elt_t *h, ngx_uint_t offset);
static ngx_int_t
ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
ngx_http_upstream_process_cache_control(ngx_http_request_t *r,
ngx_table_elt_t *h, ngx_uint_t offset);
static ngx_int_t ngx_http_upstream_ignore_header_line(ngx_http_request_t *r,
ngx_table_elt_t *h, ngx_uint_t offset);
@ -188,8 +188,7 @@ ngx_http_upstream_header_t ngx_http_upstream_headers_in[] = {
ngx_http_upstream_copy_header_line, 0, 1 },
{ ngx_string("Cache-Control"),
ngx_http_upstream_process_multi_header_lines,
offsetof(ngx_http_upstream_headers_in_t, cache_control),
ngx_http_upstream_process_cache_control, 0,
ngx_http_upstream_copy_multi_header_lines,
offsetof(ngx_http_headers_out_t, cache_control), 1 },
@ -2805,13 +2804,23 @@ ngx_http_upstream_process_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
static ngx_int_t
ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
ngx_uint_t offset)
{
return NGX_OK;
}
static ngx_int_t
ngx_http_upstream_process_cache_control(ngx_http_request_t *r,
ngx_table_elt_t *h, ngx_uint_t offset)
{
u_char *p, *last;
ngx_int_t n;
ngx_array_t *pa;
ngx_table_elt_t **ph;
pa = (ngx_array_t *) ((char *) &r->upstream->headers_in + offset);
pa = &r->upstream->headers_in.cache_control;
if (pa->elts == NULL) {
if (ngx_array_init(pa, r->pool, 2, sizeof(ngx_table_elt_t *)) != NGX_OK)
@ -2827,14 +2836,51 @@ ngx_http_upstream_process_multi_header_lines(ngx_http_request_t *r,
*ph = h;
return NGX_OK;
}
if (r->cache == NULL) {
return NGX_OK;
}
if (r->cache->valid_sec != 0) {
return NGX_OK;
}
static ngx_int_t
ngx_http_upstream_ignore_header_line(ngx_http_request_t *r, ngx_table_elt_t *h,
ngx_uint_t offset)
{
last = h->value.data + h->value.len;
if (ngx_strlcasestrn(h->value.data, last, (u_char *) "no-cache", 8 - 1)
!= NULL)
{
r->upstream->cacheable = 0;
return NGX_OK;
}
p = ngx_strlcasestrn(h->value.data, last, (u_char *) "max-age=", 8 - 1);
if (p == NULL) {
return NGX_OK;
}
n = 0;
for (p += 8; p < last; p++) {
if (*p == ';' || *p == ' ') {
break;
}
if (*p >= '0' && *p <= '9') {
n = n * 10 + *p - '0';
continue;
}
r->upstream->cacheable = 0;
return NGX_OK;
}
if (n == 0) {
r->upstream->cacheable = 0;
return NGX_OK;
}
r->cache->valid_sec = ngx_time() + n;
return NGX_OK;
}