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-rw-r--r--modules/caddyhttp/headers/headers.go5
1 files changed, 4 insertions, 1 deletions
diff --git a/modules/caddyhttp/headers/headers.go b/modules/caddyhttp/headers/headers.go
index d523723..f8d3fdc 100644
--- a/modules/caddyhttp/headers/headers.go
+++ b/modules/caddyhttp/headers/headers.go
@@ -332,7 +332,10 @@ func (rww *responseWriterWrapper) WriteHeader(status int) {
if rww.wroteHeader {
return
}
- rww.wroteHeader = true
+ // 1xx responses aren't final; just informational
+ if status < 100 || status > 199 {
+ rww.wroteHeader = true
+ }
if rww.require == nil || rww.require.Match(status, rww.ResponseWriterWrapper.Header()) {
if rww.headerOps != nil {
rww.headerOps.ApplyTo(rww.ResponseWriterWrapper.Header(), rww.replacer)