HonoH
Hono•16mo ago
Chris

Hono SSE Stream Closing Unexpectedly After 10 Seconds

Title: Hono SSE Stream Closing After 10 Seconds

Issue: Using Hono's streamSSE, the SSE connection closes after ~10 seconds, regardless of client (curl/browser). A minimal Node.js SSE server works fine.

Environment: Debian, localhost

Code snippet:
app.get("/render", (c: Context) => {
  return streamSSE(c, async (stream) => {
    while (true) {
      await stream.writeSSE({
        data: `It is ${new Date().toISOString()}`,
        event: "time-update",
      });
      await stream.sleep(1000);
    }
  });
});


Logs show:
SSE connection initiated
Sending message #1: It is 2024-08-30T14:21:10.214Z
...
Sending message #9: It is 2024-08-30T14:21:18.236Z
Stream aborted by client


Any ideas why Hono's SSE implementation might be closing the connection prematurely? Tried error handling and abort detection, issue persists. Thanks for any help!
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