From 7ada9c628075dd1fa11ac9b069d521af4928407e Mon Sep 17 00:00:00 2001
From: ale <ale@incal.net>
Date: Sun, 26 Nov 2017 10:57:58 +0000
Subject: [PATCH] Add utilities for JSON request/response HTTP endpoints
---
serverutil/json.go | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 serverutil/json.go
diff --git a/serverutil/json.go b/serverutil/json.go
new file mode 100644
index 0000000..e1d0f85
--- /dev/null
+++ b/serverutil/json.go
@@ -0,0 +1,37 @@
+package serverutil
+
+import (
+ "encoding/json"
+ "net/http"
+)
+
+// DecodeJSONRequest decodes a JSON object from an incoming HTTP POST
+// request and return true when successful. In case of errors, it will
+// write an error response to w and return false.
+func DecodeJSONRequest(w http.ResponseWriter, r *http.Request, obj interface{}) bool {
+ if r.Method != "POST" {
+ http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+ return false
+ }
+ if r.Header.Get("Content-Type") != "application/json" {
+ http.Error(w, "Need JSON request", http.StatusBadRequest)
+ return false
+ }
+
+ if err := json.NewDecoder(r.Body).Decode(obj); err != nil {
+ http.Error(w, err.Error(), http.StatusBadRequest)
+ return false
+ }
+
+ return true
+}
+
+// EncodeJSONResponse writes an application/json response to w.
+func EncodeJSONResponse(w http.ResponseWriter, obj interface{}) {
+ w.Header().Set("Content-Type", "application/json")
+ w.Header().Set("Pragma", "no-cache")
+ w.Header().Set("Cache-Control", "no-store")
+ w.Header().Set("Expires", "-1")
+ w.Header().Set("X-Content-Type-Options", "nosniff")
+ json.NewEncoder(w).Encode(obj)
+}
--
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