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Comment by dmm | Hacker News Reader

Unfortunately chrome recently removed support for "multipart/x-mixed-replace". It's too bad too. It was a simple way to implement a webcam.

https://code.google.com/p/chromium/issues/detail?id=249132 http://blog.chromium.org/2013/07/chrome-29-beta-web-audio-an...

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According to those links, they still support it for images, but removed support for other types of resources.

It's too bad IE never supported multipart/x-mixed-replace or we might have seen more live updating websites earlier. Now that we have WebSockets and well understood long polling approaches it doesn't matter any more, since x-mixed-replace would keep the download spinner spinning forever and the newer approaches don't have that problem.

I used multipart replace in firefox for streaming data for years with no download spinner. I couldn't use it in chrome because chrome always seemed to have some weird bug where 'frames' (of data in my case) were delayed.

I was disappointed when they were unceremoniously ripped out, but yes, websockets are better.

Ok, I believe you, it's been over 10 years since I tried it :-) Maybe I was thinking of the forever iframe, where a regular application/javascript document had content added to it incrementally over time.

It is actually pretty bizarre. If you point Chrome at a .jpeg that does multipart/replace it will stall, giving you roughly 0.2 fps. Point it at a. .html that contains an <img> tag and it works fine. Found this out while hacking on Hawkeye: https://igorpartola.com/projects/hawkeye/

Thanks. I misunderstood that post.

Apparently breaking the web interface for older versions of CUPS in the process.

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