1 files changed, 10 insertions, 0 deletions

diff --git a/canvas.go b/canvas.go
index f1a2375..41afce7 100644
--- a/canvas.go
+++ b/canvas.go
@@ -15,8 +15,18 @@ import (
 
 func initialize() {
         instance_url := os.Getenv("CANVAS_INSTANCE")
+        if len(instance_url) == 0 {
+                fmt.Println("The CANVAS_INSTANCE environment variable seems to be empty. Exiting.")
+                os.Exit(1)
+        }
+
         base_link = instance_url + "/api/v1"
         token = os.Getenv("CANVAS_API_KEY")
+        if len(token) == 0 {
+                fmt.Println("The CANVAS_API_KEY environment variable seems to be empty. Exiting.")
+                os.Exit(1)
+        }
+
         jar, _ := cookiejar.New(&cookiejar.Options{
                 PublicSuffixList: publicsuffix.List,
         })