BUG/MINOR: cache: Cache response even if request has "no-cache" directive
Since commit cc9bf2e5f "MEDIUM: cache: Change caching conditions"
responses that do not have an explicit expiration time are not cached
anymore. But this mechanism wrongly used the TX_CACHE_IGNORE flag
instead of the TX_CACHEABLE one. The effect this had is that a cacheable
response that corresponded to a request having a "Cache-Control:
no-cache" for instance would not be cached.
Contrary to what was said in the other commit message, the "checkcache"
option should not be impacted by the use of the TX_CACHEABLE flag
instead of the TX_CACHE_IGNORE one. The response is indeed considered as
not cacheable if it has no expiration time, regardless of the presence
of a cookie in the response.
This should fix GitHub issue #2048.
This patch can be backported up to branch 2.4.
diff --git a/include/haproxy/http_ana-t.h b/include/haproxy/http_ana-t.h
index 4db72fd..3910a4d 100644
--- a/include/haproxy/http_ana-t.h
+++ b/include/haproxy/http_ana-t.h
@@ -61,7 +61,7 @@
/* cacheability management, bits values 0x1000 to 0x3000 (0-3 shift 12) */
#define TX_CACHEABLE 0x00001000 /* at least part of the response is cacheable */
#define TX_CACHE_COOK 0x00002000 /* a cookie in the response is cacheable */
-#define TX_CACHE_IGNORE 0x00004000 /* do not retrieve object from cache, or avoid caching response */
+#define TX_CACHE_IGNORE 0x00004000 /* do not retrieve object from cache */
#define TX_CACHE_SHIFT 12 /* bit shift */
#define TX_CON_WANT_TUN 0x00008000 /* Will be a tunnel (CONNECT or 101-Switching-Protocol) */
diff --git a/reg-tests/cache/caching_rules.vtc b/reg-tests/cache/caching_rules.vtc
index b1ea7f9..61274b4 100644
--- a/reg-tests/cache/caching_rules.vtc
+++ b/reg-tests/cache/caching_rules.vtc
@@ -67,6 +67,18 @@
txresp -hdr "Cache-Control: max-age=500" \
-hdr "Age: 100" -bodylen 140
+
+ # "Control-Cache: no-cache" on client request but still stored in cache
+ rxreq
+ expect req.url == "/nocache"
+ txresp -hdr "Cache-Control: max-age=500" \
+ -hdr "Age: 100" -bodylen 140
+
+ rxreq
+ expect req.url == "/nocache"
+ txresp -hdr "Cache-Control: max-age=500" \
+ -hdr "Age: 100" -bodylen 140
+
} -start
server s2 {
@@ -221,4 +233,24 @@
expect resp.bodylen == 140
expect resp.http.X-Cache-Hit == 1
+ # Cache-Control: no-cache
+ txreq -url "/nocache" -hdr "Cache-Control: no-cache"
+ rxresp
+ expect resp.status == 200
+ expect resp.bodylen == 140
+ expect resp.http.X-Cache-Hit == 0
+
+ txreq -url "/nocache" -hdr "Cache-Control: no-cache"
+ rxresp
+ expect resp.status == 200
+ expect resp.bodylen == 140
+ expect resp.http.X-Cache-Hit == 0
+
+ txreq -url "/nocache"
+ rxresp
+ expect resp.status == 200
+ expect resp.bodylen == 140
+ expect resp.http.X-Cache-Hit == 1
+
+
} -run
diff --git a/src/cache.c b/src/cache.c
index 2b8a782..c7a231b 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -1101,7 +1101,7 @@
http_check_response_for_cacheability(s, &s->res);
- if (!(txn->flags & TX_CACHEABLE) || !(txn->flags & TX_CACHE_COOK) || (txn->flags & TX_CACHE_IGNORE))
+ if (!(txn->flags & TX_CACHEABLE) || !(txn->flags & TX_CACHE_COOK))
goto out;
shctx_lock(shctx);
diff --git a/src/http_ana.c b/src/http_ana.c
index cb7cb27..ba587df 100644
--- a/src/http_ana.c
+++ b/src/http_ana.c
@@ -3772,7 +3772,7 @@
/* We won't store an entry that has neither a cache validator nor an
* explicit expiration time, as suggested in RFC 7234#3. */
if (!has_freshness_info && !has_validator)
- txn->flags |= TX_CACHE_IGNORE;
+ txn->flags &= ~TX_CACHEABLE;
}
/*