headers

weed/s3api/s3api_object_handlers_put.go

@@ -443,7 +443,13 @@ func (s3a *S3ApiServer) putToFiler(r *http.Request, uploadUrl string, dataReader
 	// Copy user metadata and standard headers
 	for k, v := range r.Header {
 		if len(v) > 0 && len(v[0]) > 0 {
-			if strings.HasPrefix(k, "X-Amz-Meta-") || k == "Cache-Control" || k == "Expires" || k == "Content-Disposition" {
+			if strings.HasPrefix(k, "X-Amz-Meta-") {
+				// AWS S3 stores user metadata keys in lowercase
+				// Go's HTTP server canonicalizes headers (e.g., x-amz-meta-foo → X-Amz-Meta-Foo)
+				// but S3 expects lowercase, so convert back to lowercase for storage
+				lowerKey := strings.ToLower(k)
+				entry.Extended[lowerKey] = []byte(v[0])
+			} else if k == "Cache-Control" || k == "Expires" || k == "Content-Disposition" {
 				entry.Extended[k] = []byte(v[0])
 			}
 			if k == "Response-Content-Disposition" {

weed/server/filer_server_handlers_write_autochunk.go

@@ -544,8 +544,12 @@ func SaveAmzMetaData(r *http.Request, existing map[string][]byte, isReplace bool
 
 	for header, values := range r.Header {
 		if strings.HasPrefix(header, s3_constants.AmzUserMetaPrefix) {
+			// AWS S3 stores user metadata keys in lowercase
+			// Go's HTTP server canonicalizes headers (e.g., x-amz-meta-foo → X-Amz-Meta-Foo)
+			// but S3 expects lowercase, so convert back to lowercase for storage
+			lowerHeader := strings.ToLower(header)
 			for _, value := range values {
-				metadata[header] = []byte(value)
+				metadata[lowerHeader] = []byte(value)
 			}
 		}
 	}