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-rw-r--r--modules/caddyhttp/matchers.go29
1 files changed, 24 insertions, 5 deletions
diff --git a/modules/caddyhttp/matchers.go b/modules/caddyhttp/matchers.go
index c5cf21d..4886ba6 100644
--- a/modules/caddyhttp/matchers.go
+++ b/modules/caddyhttp/matchers.go
@@ -470,13 +470,32 @@ func (m *MatchHeader) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
}
for d.Next() {
var field, val string
- if !d.Args(&field, &val) {
- return d.Errf("malformed header matcher: expected both field and value")
+ if !d.Args(&field) {
+ return d.Errf("malformed header matcher: expected field")
}
- // If multiple header matchers with the same header field are defined,
- // we want to add the existing to the list of headers (will be OR'ed)
- http.Header(*m).Add(field, val)
+ if strings.HasPrefix(field, "!") {
+ if len(field) == 1 {
+ return d.Errf("malformed header matcher: must have field name following ! character")
+ }
+
+ field = field[1:]
+ headers := *m
+ headers[field] = nil
+ m = &headers
+ if d.NextArg() {
+ return d.Errf("malformed header matcher: null matching headers cannot have a field value")
+ }
+ } else {
+ if !d.NextArg() {
+ return d.Errf("malformed header matcher: expected both field and value")
+ }
+
+ // If multiple header matchers with the same header field are defined,
+ // we want to add the existing to the list of headers (will be OR'ed)
+ val = d.Val()
+ http.Header(*m).Add(field, val)
+ }
if d.NextBlock(0) {
return d.Err("malformed header matcher: blocks are not supported")