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patio11's profile
Patrick McKenzie
Patrick McKenzie
Patrick McKenzie
@patio11

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Patrick McKenzie

@patio11

I work for the Internet, at @stripe, mostly on accelerating startups. Opinions here are my own.

東京都 Tokyo
kalzumeus.com
Joined February 2009

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    1. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Self-hosting my own blog has been a joyful experience of, every six months, getting reported that images fail to load on old posts because of a tweak to Nginx configs for the HTTPS site at some point in the arbitrary past. When did we make the Internet so ()#%(& complicated.

      12 replies 4 retweets 104 likes
      Show this thread
    2. Colin Percival‏ @cperciva 10 Jun 2019
      • Report Tweet
      • Report NetzDG Violation
      Replying to @patio11

      I have never had anything like this happen to me. Not once in ~15 years. I'm really curious how you managed to create such a fragile configuration.

      1 reply 0 retweets 4 likes
    3. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @cperciva

      It's a legacy software story. Do you really want me to inflict a legacy software story on the world via Twitter?

      1 reply 0 retweets 7 likes
    4. Colin Percival‏ @cperciva 10 Jun 2019
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      Replying to @patio11

      YES!

      2 replies 0 retweets 10 likes
    5. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @cperciva

      Alright world, blame Colin. So I went down the web speed rabbit hole in the late 2000s and, naturally, used my blog as a test bed. One feature of browsers circa the late 2000s was, to avoid overloading a web server, they would only parallelize up to 2 resource loads.

      1 reply 0 retweets 8 likes
    6. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @patio11 @cperciva

      This would result in browsers only loading 2 e.g. images from the same domain name at once, so best practice was to stripe your images over e.g. images{1,2,3,4}.example.com Which I did, and which quietly chugged along for much of the intervening decade.

      1 reply 0 retweets 1 like
    7. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @patio11 @cperciva

      At some point in there I replaced the images* subdomains with a CDN, but when I upgraded the site to HTTPS, the fact that my CDN couldn't usefully use a HTTP certificate for my own domain name made me bring them back onto a server under my control.

      2 replies 0 retweets 0 likes
    8. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @patio11 @cperciva

      At some point, as a weekend project, I upgraded the blog to HTTPS everywhere, but did not test this upgrade on my (relatively rare) posts which contained images in the body.

      1 reply 0 retweets 0 likes
    9. Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @patio11 @cperciva

      Had I done that, I would have realized that request to the HTTPS (but not HTTP) images{1,2,3,4} subdomains were being routed not to the Nginx configuration for the images subdomain but rather to the configuration for the blog, which would (for regex related tomfoolery) instead

      1 reply 0 retweets 1 like
      Patrick McKenzie‏ @patio11 10 Jun 2019
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      Replying to @patio11 @cperciva

      reply with an HTML document including my blog's archive page. So what I actually needed to do was include an explicit configuration for images{1,2,3,4} on the 443 port to stop Nginx from waterfalling that to a different configuration. Obviously.

      2:53 PM - 10 Jun 2019
      • 6 Likes
      • Cody W. Geisler Henk Poley David Wolever John Terracina Weltschmerz
      3 replies 0 retweets 6 likes
        1. New conversation
        2. Colin Percival‏ @cperciva 10 Jun 2019
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          Replying to @patio11

          Ok, I'm going to say that this is entirely self-inflicted and totally not a general problem of the internet being complicated.

          1 reply 0 retweets 12 likes
        3. Francis  😷 Gulotta‏ @reconbot 10 Jun 2019
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          Replying to @cperciva @patio11

          it's not *that* hard to mass migrate img src attributes btw

          0 replies 0 retweets 0 likes
        4. End of conversation
        1. I Like Spike‏ @szarka 10 Jun 2019
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          Replying to @patio11 @cperciva

          Heh. I have a similar, albeit less-baroque, situation on some old pages. Including, potentially, some customers' pages, so I can't be positive that I've found everything I might break.

          0 replies 0 retweets 0 likes
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        1. PressCaptain‏ @PressCapt 12 Jun 2019
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          Replying to @patio11 @cperciva

          You can stand @Cloudflare in front of it then 301 redirect the legacy domain sharding you had previously setup. Takes less than 15 minutes with ubiquitous SSL too. Also checkout the sub_filter directive for @nginx which can help with URL cleanup if you’d like.

          0 replies 0 retweets 0 likes
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