From 5452a224bf619dd256d7906e55dad440c49e36e0 Mon Sep 17 00:00:00 2001
From: Eric Wohltman <eric.wohltman@gmail.com>
Date: Thu, 19 Dec 2019 12:46:45 -0500
Subject: [PATCH] Fix for Discord's API returning a 400 Bad Request if
 Content-Type is set, but the request body is empty.

---
 restapi.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/restapi.go b/restapi.go
index 8134d92..69c5507 100644
--- a/restapi.go
+++ b/restapi.go
@@ -88,7 +88,12 @@ func (s *Session) RequestWithLockedBucket(method, urlStr, contentType string, b
 		req.Header.Set("authorization", s.Token)
 	}
 
-	req.Header.Set("Content-Type", contentType)
+	// Discord's API returns a 400 Bad Request is Content-Type is set, but the
+	// request body is empty.
+	if b != nil {
+		req.Header.Set("Content-Type", contentType)
+	}
+
 	// TODO: Make a configurable static variable.
 	req.Header.Set("User-Agent", s.UserAgent)