1 files changed, 46 insertions, 42 deletions
diff --git a/std/ws/README.md b/std/ws/README.md
index c166a5fb6..0c3b7a2a2 100644
--- a/std/ws/README.md
+++ b/std/ws/README.md
@@ -7,58 +7,62 @@ ws module is made to provide helpers to create WebSocket client/server.
 ### Server
 
 ```ts
-import { serve } from "https://deno.land/std/http/server.ts";
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { serve } from "../../http/server.ts";
 import {
   acceptWebSocket,
   isWebSocketCloseEvent,
   isWebSocketPingEvent,
-} from "https://deno.land/std/ws/mod.ts";
-
-/** websocket echo server */
-const port = Deno.args[0] || "8080";
-console.log(`websocket server is running on :${port}`);
-for await (const req of serve(`:${port}`)) {
-  const { conn, r: bufReader, w: bufWriter, headers } = req;
+  WebSocket,
+} from "../../ws/mod.ts";
 
+async function handleWs(sock: WebSocket) {
+  console.log("socket connected!");
   try {
-    const sock = await acceptWebSocket({
+    for await (const ev of sock) {
+      if (typeof ev === "string") {
+        // text message
+        console.log("ws:Text", ev);
+        await sock.send(ev);
+      } else if (ev instanceof Uint8Array) {
+        // binary message
+        console.log("ws:Binary", ev);
+      } else if (isWebSocketPingEvent(ev)) {
+        const [, body] = ev;
+        // ping
+        console.log("ws:Ping", body);
+      } else if (isWebSocketCloseEvent(ev)) {
+        // close
+        const { code, reason } = ev;
+        console.log("ws:Close", code, reason);
+      }
+    }
+  } catch (err) {
+    console.error(`failed to receive frame: ${err}`);
+
+    if (!sock.isClosed) {
+      await sock.close(1000).catch(console.error);
+    }
+  }
+}
+
+if (import.meta.main) {
+  /** websocket echo server */
+  const port = Deno.args[0] || "8080";
+  console.log(`websocket server is running on :${port}`);
+  for await (const req of serve(`:${port}`)) {
+    const { conn, r: bufReader, w: bufWriter, headers } = req;
+    acceptWebSocket({
       conn,
       bufReader,
       bufWriter,
       headers,
-    });
-
-    console.log("socket connected!");
-
-    try {
-      for await (const ev of sock) {
-        if (typeof ev === "string") {
-          // text message
-          console.log("ws:Text", ev);
-          await sock.send(ev);
-        } else if (ev instanceof Uint8Array) {
-          // binary message
-          console.log("ws:Binary", ev);
-        } else if (isWebSocketPingEvent(ev)) {
-          const [, body] = ev;
-          // ping
-          console.log("ws:Ping", body);
-        } else if (isWebSocketCloseEvent(ev)) {
-          // close
-          const { code, reason } = ev;
-          console.log("ws:Close", code, reason);
-        }
-      }
-    } catch (err) {
-      console.error(`failed to receive frame: ${err}`);
-
-      if (!sock.isClosed) {
-        await sock.close(1000).catch(console.error);
-      }
-    }
-  } catch (err) {
-    console.error(`failed to accept websocket: ${err}`);
-    await req.respond({ status: 400 });
+    })
+      .then(handleWs)
+      .catch(async (e) => {
+        console.error(`failed to accept websocket: ${err}`);
+        await req.respond({ status: 400 });
+      });
   }
 }
 ```