diff options
Diffstat (limited to 'middleware/cache/setup.go')
| -rw-r--r-- | middleware/cache/setup.go | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/middleware/cache/setup.go b/middleware/cache/setup.go index 11a35ddc4..337930fe4 100644 --- a/middleware/cache/setup.go +++ b/middleware/cache/setup.go @@ -1,6 +1,7 @@ package cache import ( + "fmt" "strconv" "time" @@ -49,6 +50,10 @@ func cacheParse(c *caddy.Controller) (*Cache, error) { // first args may be just a number, then it is the ttl, if not it is a zone ttl, err := strconv.Atoi(args[0]) if err == nil { + // Reserve 0 (and smaller for future things) + if ttl <= 0 { + return nil, fmt.Errorf("cache TTL can not be zero or negative: %d", ttl) + } ca.pttl = time.Duration(ttl) * time.Second ca.nttl = time.Duration(ttl) * time.Second args = args[1:] @@ -77,6 +82,10 @@ func cacheParse(c *caddy.Controller) (*Cache, error) { if err != nil { return nil, err } + // Reserve 0 (and smaller for future things) + if pttl <= 0 { + return nil, fmt.Errorf("cache TTL can not be zero or negative: %d", pttl) + } ca.pttl = time.Duration(pttl) * time.Second } case Denial: @@ -94,6 +103,10 @@ func cacheParse(c *caddy.Controller) (*Cache, error) { if err != nil { return nil, err } + // Reserve 0 (and smaller for future things) + if nttl <= 0 { + return nil, fmt.Errorf("cache TTL can not be zero or negative: %d", nttl) + } ca.nttl = time.Duration(nttl) * time.Second } default: |