feat: improve error message

src/open.ts

@@ -72,9 +72,9 @@ export const open: Open = async (
       openTimeout
     )
   } else if (socket.readyState == ReadyState.Closing) {
-    throw new Error('Socket is closing')
+    throw new Error('[maria2 error] Socket is closing')
   } else if (socket.readyState == ReadyState.Closed) {
-    throw new Error('Socket is closed')
+    throw new Error('[maria2 error] Socket is closed')
   }
 
   socket.addEventListener('message', handleMessage)

src/shared.ts

@@ -1,3 +1,7 @@
+export const isDev =
+  process.env['NODE_ENV'] != 'production' ||
+  (globalThis as any)?.Deno?.env?.get?.('NODE_ENV') != 'production'
+
 export const isNodeEnv =
   (globalThis as any)?.global?.process?.versions?.node != null
 
@@ -21,10 +25,28 @@ export const randomUUID = await (async () => {
       if (nodeUUID != null) return nodeUUID
     }
 
-    console.warn(
-      '[warn] Not found `crypto.randomUUID()` in this environment; ' +
-        'switching to fallback (unsafe)'
-    )
+    if (typeof Math.random == 'function') {
+      if (isDev) {
+        console.warn(
+          '[maria2 warn] Not found `crypto.randomUUID()` in this environment; ' +
+            'switching to fallback (Math.random)'
+        )
+      }
+
+      return () =>
+        [Math.random(), Math.random(), Math.random()]
+          .map((v) => v.toString(16).slice(2))
+          .join('')
+          .slice(0, 32)
+          .padStart(32, '0')
+    }
+
+    if (isDev) {
+      console.warn(
+        '[maria2 warn] Not found `crypto.randomUUID()` in this environment; ' +
+          'switching to fallback (unsafe counting)'
+      )
+    }
 
     let count = 0
     return () => (count += 1).toString()
@@ -43,7 +65,7 @@ export const useTimeout = <T>(
     p,
     sleep(ms).then(() => {
       onTimeout?.()
-      throw new Error(`Timeout of ${ms}ms exceeded`)
+      throw new Error(`[maria2 error] Timeout of ${ms}ms exceeded`)
     }),
   ])
 
@@ -68,6 +90,6 @@ export const decodeMessageData = (data: any) => {
     }
     return out.join('')
   } else {
-    throw new Error('Data cannot be decoded')
+    throw new Error('[maria2 error] Message data cannot be decoded')
   }
 }

src/transport/http.ts

@@ -26,7 +26,7 @@ const createPost = await (async () => {
     return (await import('../shims/xhr.ts')).xhrPost
   } else {
     return () => {
-      throw new Error('Not found any http client implementation.')
+      throw new Error('[maria2 error] HTTP client implementation is missing')
     }
   }
 })()

src/transport/websocket.ts

@@ -8,7 +8,9 @@ const WebSocket =
     ? (await import('ws')).default
     : class {
         constructor() {
-          throw new Error('Not found any http client implementation.')
+          throw new Error(
+            '[maria2 error] WebSocket client implementation is missing'
+          )
         }
       })
 
@@ -29,7 +31,7 @@ export const createWebSocket: CreateWebSocket = (
   options?: Partial<OpenOptions>
 ) => {
   if (WebSocket == null) {
-    throw new Error('Not Found `WebSocket()` in globalThis or require()')
+    throw new Error('[maria2 error] WebSocket client implementation is missing')
   }
 
   return new (class extends WebSocket {