finish database, udp pool

src/components/UploadCard.vue

@@ -23,6 +23,7 @@
 
 <script lang="ts" setup>
 import { client } from '@/client';
+import { TRPCClientError } from '@trpc/client';
 
 var bitstream = null;
 
@@ -41,9 +42,20 @@ function handleFileChange(event: Event): void {
 }
 
 async function uploadBitStream() {
-  const serverStatus = await client.api.status.query();
+  try {
+    const serverStatus = await client.api.status.query();
+    if (serverStatus != "OK") {
+      throw new Error("Server Busy...")
+    }
+
+  } catch (error) {
+    if (error instanceof TRPCClientError) {
+      console.error("Can't connect to Server!")
+    } else {
+      console.error(error)
+    }
+  }
 
-  console.log(serverStatus)
 }
 
 function checkFileType(file: File) {