error: Uncaught (in promise) Http: connection closed before message completed

[LoganTann]

Sometimes, the following error appears randomly when I do a request :

error: Uncaught (in promise) Http: connection closed before message completed
    at Object.respondWith (deno:ext/http/01_http.js:254:21)

Unfortunately, I don't have further information. I can't even reproduce sometimes.

The following github issue and linked threads might help : denoland/deno#13203

[LoganTann]

It also happens a lot when returning a server sent event.

[LoganTann]

This issue is very blocking as it causes the server to completely crash @gr7d

I believe we should handle the error at this line : https://github.com/gr7d/aqua/blob/main/shared.ts#L57C20-L57C20

[predetermined]

I'm currently trying to reproduce it. If you have any tips, I'd be thankful.

[LoganTann]

I can confirm adding a .catch() on the line I mentioned fixed the issue.

@gr7d If you have any tips, I'd be thankful.

To create a reproduction code (with aqua v1), you may try this :

app.get("/progress", (req) => {
	let interval: number;
	const stream = new ReadableStream({
	  start(controller) {
		interval = setInterval(() => {
			const val = `data: ${new Date().toISOString()}\r\n\r\n`;
			controller.enqueue(new TextEncoder().encode(val));
		}, 300);
	  },
	  cancel() {
		clearInterval(interval);
	  }
	});
  
	return {
	  content: stream,
	  headers: {
		"Content-Type": "text/event-stream"
	  }
	};
  });

Then, create an HTML page to subscribe to the event source using the new EventSource("/progress") API.

Reload multiple times the page and you might get the error I described.

[predetermined]

Fix (#101) included in release v1.3.6. Thanks for your patience :)

[LoganTann]

Thank you too for maintaining this lib, it is very simple, and I'm using it in many projects !