1 files changed, 21 insertions, 0 deletions
diff --git a/json.go b/json.go
new file mode 100644
index 0000000..62894cb
--- /dev/null
+++ b/json.go
@@ -0,0 +1,21 @@
+// SPDX-FileCopyrightText: 2020 Ethel Morgan
+//
+// SPDX-License-Identifier: MIT
+
+package httputil
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+)
+
+// MustWriteJSON writes data to w, panicking if it cannot.
+// It panics because being unable to marshal JSON is programmer error, and not recoverable.
+func MustWriteJSON(w http.ResponseWriter, data interface{}) {
+	blob, err := json.Marshal(data)
+	if err != nil {
+		panic(fmt.Sprintf("could not marshal JSON: %v", err))
+	}
+	w.Write(blob)
+}