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Cache: ETag now saved into cache header.

This commit is contained in:
Maxim Dounin 2014-06-26 02:28:23 +04:00
parent 3e0eecc7a1
commit b393276eee
3 changed files with 22 additions and 1 deletions
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7
src/http/ngx_http_cache.h
View File

@ -24,8 +24,9 @@
#define NGX_HTTP_CACHE_SCARCE 8
#define NGX_HTTP_CACHE_KEY_LEN 16
#define NGX_HTTP_CACHE_ETAG_LEN 42
#define NGX_HTTP_CACHE_VERSION 1
#define NGX_HTTP_CACHE_VERSION 2
typedef struct {
@ -69,6 +70,8 @@ struct ngx_http_cache_s {
time_t last_modified;
time_t date;
ngx_str_t etag;
size_t header_start;
size_t body_start;
off_t length;
@ -107,6 +110,8 @@ typedef struct {
u_short valid_msec;
u_short header_start;
u_short body_start;
u_char etag_len;
u_char etag[NGX_HTTP_CACHE_ETAG_LEN];
} ngx_http_file_cache_header_t;

12
src/http/ngx_http_file_cache.c
View File

@ -525,6 +525,8 @@ ngx_http_file_cache_read(ngx_http_request_t *r, ngx_http_cache_t *c)
c->valid_msec = h->valid_msec;
c->header_start = h->header_start;
c->body_start = h->body_start;
c->etag.len = h->etag_len;
c->etag.data = h->etag;
r->cached = 1;
@ -890,6 +892,11 @@ ngx_http_file_cache_set_header(ngx_http_request_t *r, u_char *buf)
h->header_start = (u_short) c->header_start;
h->body_start = (u_short) c->body_start;
if (c->etag.len <= NGX_HTTP_CACHE_ETAG_LEN) {
h->etag_len = (u_char) c->etag.len;
ngx_memcpy(h->etag, c->etag.data, c->etag.len);
}
p = buf + sizeof(ngx_http_file_cache_header_t);
p = ngx_cpymem(p, ngx_http_file_cache_key, sizeof(ngx_http_file_cache_key));
@ -1077,6 +1084,11 @@ ngx_http_file_cache_update_header(ngx_http_request_t *r)
h.header_start = (u_short) c->header_start;
h.body_start = (u_short) c->body_start;
if (c->etag.len <= NGX_HTTP_CACHE_ETAG_LEN) {
h.etag_len = (u_char) c->etag.len;
ngx_memcpy(h.etag, c->etag.data, c->etag.len);
}
(void) ngx_write_file(&file, (u_char *) &h,
sizeof(ngx_http_file_cache_header_t), 0);

4
src/http/ngx_http_upstream.c
View File

@ -2498,6 +2498,10 @@ ngx_http_upstream_send_response(ngx_http_request_t *r, ngx_http_upstream_t *u)
r->cache->date = now;
r->cache->body_start = (u_short) (u->buffer.pos - u->buffer.start);
if (u->headers_in.etag) {
r->cache->etag = u->headers_in.etag->value;
}
ngx_http_file_cache_set_header(r, u->buffer.start);
} else {