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-rw-r--r--modules/caddyhttp/headers/caddyfile.go18
-rw-r--r--modules/caddyhttp/headers/headers.go2
2 files changed, 17 insertions, 3 deletions
diff --git a/modules/caddyhttp/headers/caddyfile.go b/modules/caddyhttp/headers/caddyfile.go
index ee1a81a..e69c679 100644
--- a/modules/caddyhttp/headers/caddyfile.go
+++ b/modules/caddyhttp/headers/caddyfile.go
@@ -33,10 +33,13 @@ func init() {
// header [<matcher>] [[+|-]<field> [<value|regexp>] [<replacement>]] {
// [+]<field> [<value|regexp> [<replacement>]]
// -<field>
+// [defer]
// }
//
// Either a block can be opened or a single header field can be configured
-// in the first line, but not both in the same directive.
+// in the first line, but not both in the same directive. Header operations
+// are deferred to write-time if any headers are being deleted or if the
+// 'defer' subdirective is used.
func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error) {
hdr := new(Handler)
@@ -44,7 +47,6 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
if hdr.Response == nil {
hdr.Response = &RespHeaderOps{
HeaderOps: new(HeaderOps),
- Deferred: true,
}
}
}
@@ -64,14 +66,21 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
}
makeResponseOps()
CaddyfileHeaderOp(hdr.Response.HeaderOps, field, value, replacement)
+ if len(hdr.Response.HeaderOps.Delete) > 0 {
+ hdr.Response.Deferred = true
+ }
}
// if not, they should be in a block
for h.NextBlock(0) {
+ field := h.Val()
+ if field == "defer" {
+ hdr.Response.Deferred = true
+ continue
+ }
if hasArgs {
return nil, h.Err("cannot specify headers in both arguments and block")
}
- field := h.Val()
var value, replacement string
if h.NextArg() {
value = h.Val()
@@ -81,6 +90,9 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
}
makeResponseOps()
CaddyfileHeaderOp(hdr.Response.HeaderOps, field, value, replacement)
+ if len(hdr.Response.HeaderOps.Delete) > 0 {
+ hdr.Response.Deferred = true
+ }
}
}
diff --git a/modules/caddyhttp/headers/headers.go b/modules/caddyhttp/headers/headers.go
index 8dec42c..681c21f 100644
--- a/modules/caddyhttp/headers/headers.go
+++ b/modules/caddyhttp/headers/headers.go
@@ -178,6 +178,8 @@ type RespHeaderOps struct {
// If true, header operations will be deferred until
// they are written out. Superceded if Require is set.
+ // Usually you will need to set this to true if any
+ // fields are being deleted.
Deferred bool `json:"deferred,omitempty"`
}