From 1e7d3b25c283c556d98c65f1c2f46db4e4178995 Mon Sep 17 00:00:00 2001
From: Jeffrey Schiller <jis@mit.edu>
Date: Mon, 6 Jun 2022 10:57:19 -0400
Subject: [PATCH] fix: use correct basepath prefix for preview urls (#1971)

---
 frontend/src/api/utils.js | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/frontend/src/api/utils.js b/frontend/src/api/utils.js
index ddddcfa7..b995bcb8 100644
--- a/frontend/src/api/utils.js
+++ b/frontend/src/api/utils.js
@@ -62,7 +62,11 @@ export function removePrefix(url) {
 }
 
 export function createURL(endpoint, params = {}, auth = true) {
-  const url = new URL(encodePath(endpoint), origin + baseURL);
+  let prefix = baseURL;
+  if (prefix[prefix.length] !== "/") {
+    prefix = prefix + "/";
+  }
+  const url = new URL(prefix + encodePath(endpoint), origin);
 
   const searchParams = {
     ...(auth && { auth: store.state.jwt }),