fix: 500 error caused by non-ASCII in HTTP headers

2 files changed, 33 insertions, 0 deletions

diff --git a/api/headers.js b/api/headers.js
new file mode 100644
index 00000000..9cbf6ac3
--- /dev/null
+++ b/api/headers.js
@@ -0,0 +1,13 @@
+// headers.js
+export default (req, res) => {
+    const headers = res.headers();
+    for (const key in headers) {
+      const value = headers[key];
+      if (typeof value === 'string') {
+        headers[key] = value.replace(/[^\x00-\x7F]/g, (char) => {
+          return `%${char.charCodeAt(0).toString(16).toUpperCase()}`;
+        });
+      }
+    }
+    return res;
+  };
\ No newline at end of file
diff --git a/vercel.json b/vercel.json
new file mode 100644
index 00000000..64a090ca
--- /dev/null
+++ b/vercel.json
@@ -0,0 +1,20 @@
+{
+    "version": 2,
+    "functions": {
+      "api/headers.js": {
+        "runtime": "nodejs14.x",
+        "includeFiles": "api/headers.js"
+      }
+    },
+    "headers": [
+      {
+        "source": "/(.*)",
+        "headers": [
+          {
+            "key": "X-Headers-Source",
+            "value": "headers.js"
+          }
+        ]
+      }
+    ]
+  }
\ No newline at end of file