HTTP/2 Server Push on Netlify (opens in new tab)

(netlify.com)

64 pointscalavera8y ago23 comments

23 comments

21 comments · 8 top-level

thearrow8y ago· 6 in thread

How do people go about sending Link headers / configuring server push for resources with a changing hash in their filenames?

For example if you have your app.ab9a9a09fe9.js file, but then the next deploy you have your app.ba293dcde.js file... can you just set the resource to app.*.js somehow?

Svenskunganka8y ago

You can make it part of your build process to generate a file with the headers needed, and during deploy it gets copied and/or configures the web server/platform you're running on.

treve8y ago

If you can write a <script> tag that references app.ab9a9a09fe9.js, presumably you can write a HTTP header that references that same file, no?

thearrow8y ago

For example: a SPA webpack setup using html-webpack-plugin which generates the <script> tags in index.html for the different assets, later served by nginx or similar.

How does one tell nginx the names of the files to push if they are generated dynamically? You have to put the names in a separate file and then somehow configure the server using that file?

calaveraOP8y ago

this webpack plugin might help you: https://gist.github.com/Kamshak/35630ec21df8dca27de3bb915f2d...

I have no idea why the original comment by the author is shadow banned.

waxjar8y ago

What about a static website served through nginx, for example?

1 more reply

Kamshak8y ago

I suppose you are using webpack, i have just written a small plugin for this (assumes an SPA, writes the same js/css to /*): https://gist.github.com/Kamshak/35630ec21df8dca27de3bb915f2d...

ezequiel-garzon8y ago· 3 in thread

Do any browsers already provide a way to refuse pushed resources?

jbergstroem8y ago

You'd have to handle this in service workers. You want this: https://datatracker.ietf.org/doc/draft-ietf-httpbis-cache-di...

bfred_it8y ago

Why would you need this? The use case of Server Push is to download resources earlier than a browser can request them, but will eventually require anyway.

What are you hoping to refuse?

ezequiel-garzon8y ago

Thanks for the reply, and good point. I guess I feel uneasy about letting the server "push" at will, for instance when dealing with mobile data plans. But come to think about it, I don't have much control on what I'll get once I visit a website.

jitl8y ago· 2 in thread

> It’s important to understand that HTTP/2 requires secure connectivity. Only websites with HTTPS enabled can take advantage of HTTP/2 and its performance optimizations, like server push and header compression.

Pedantically, this is not correct. HTTP/2 does not mandate any encryption. But, all the browser vendors only support HTTP/2 with TLS. https://http2.github.io/faq/#does-http2-require-encryption

richardwhiuk8y ago

If you assume the second sentence explains the first, then this is correct - only websites (i.e something designed to be consumed by browsers) with HTTPS can take advantage of HTTP/2.

fredliu8y ago

This is true, but no mandate on encryption in the HTTP/2 standard was an deliberate decision, one of the very few differences between HTTP/2 and SPDY. But yes, practically, you can't use HTTP/2 without encryption nowadays.

StavrosK8y ago· 2 in thread

This is welcome, but doesn't seem to be ready. My site broke with SPDY errors (wth?) when I enabled this.

calaveraOP8y ago

Hey StavrosK, don't hesitate to reach out to Netlify support. I'd love to take a look at your site to figure out what's going on there.

StavrosK8y ago

Yep, I already talked to Chris about it, thanks! I talked to you guys a week ago about HTTP/2 Push, I didn't know you'd have it ready so soon. I'm eager to get this working on stavros.io, so please feel free to email me so we can debug this!

1 more reply

OJFord8y ago

> Developers love using the CLI because everything can be done from the command line.

What? Do users also love the UI because everything can be done by the user?

judahtanthony8y ago

How does Netlify handle caching of push file? I would love to push my global.css and global.js; however, I don't want those files to be pushed on every subsequent request.

thinkMOAR8y ago

"You can read this article in the next version of Smashing Magazine, completely hosted on Netlify."

No actually quite a few resources are served by third parties.

Zpalmtree8y ago

I read this as Netflix and was very confused for a while.

j / k navigate · click thread line to collapse

23 comments

21 comments · 8 top-level

thearrow8y ago· 6 in thread

How do people go about sending Link headers / configuring server push for resources with a changing hash in their filenames?

For example if you have your app.ab9a9a09fe9.js file, but then the next deploy you have your app.ba293dcde.js file... can you just set the resource to app.*.js somehow?

Svenskunganka8y ago

You can make it part of your build process to generate a file with the headers needed, and during deploy it gets copied and/or configures the web server/platform you're running on.

treve8y ago

If you can write a <script> tag that references app.ab9a9a09fe9.js, presumably you can write a HTTP header that references that same file, no?

thearrow8y ago

For example: a SPA webpack setup using html-webpack-plugin which generates the <script> tags in index.html for the different assets, later served by nginx or similar.

How does one tell nginx the names of the files to push if they are generated dynamically? You have to put the names in a separate file and then somehow configure the server using that file?

calaveraOP8y ago

this webpack plugin might help you: https://gist.github.com/Kamshak/35630ec21df8dca27de3bb915f2d...

I have no idea why the original comment by the author is shadow banned.

waxjar8y ago

What about a static website served through nginx, for example?

1 more reply

Kamshak8y ago

I suppose you are using webpack, i have just written a small plugin for this (assumes an SPA, writes the same js/css to /*): https://gist.github.com/Kamshak/35630ec21df8dca27de3bb915f2d...

ezequiel-garzon8y ago· 3 in thread

Do any browsers already provide a way to refuse pushed resources?

jbergstroem8y ago

You'd have to handle this in service workers. You want this: https://datatracker.ietf.org/doc/draft-ietf-httpbis-cache-di...

bfred_it8y ago

Why would you need this? The use case of Server Push is to download resources earlier than a browser can request them, but will eventually require anyway.

What are you hoping to refuse?

ezequiel-garzon8y ago

jitl8y ago· 2 in thread

Pedantically, this is not correct. HTTP/2 does not mandate any encryption. But, all the browser vendors only support HTTP/2 with TLS. https://http2.github.io/faq/#does-http2-require-encryption

richardwhiuk8y ago

If you assume the second sentence explains the first, then this is correct - only websites (i.e something designed to be consumed by browsers) with HTTPS can take advantage of HTTP/2.

fredliu8y ago

StavrosK8y ago· 2 in thread

This is welcome, but doesn't seem to be ready. My site broke with SPDY errors (wth?) when I enabled this.

calaveraOP8y ago

Hey StavrosK, don't hesitate to reach out to Netlify support. I'd love to take a look at your site to figure out what's going on there.

StavrosK8y ago

1 more reply

OJFord8y ago

> Developers love using the CLI because everything can be done from the command line.

What? Do users also love the UI because everything can be done by the user?

judahtanthony8y ago

How does Netlify handle caching of push file? I would love to push my global.css and global.js; however, I don't want those files to be pushed on every subsequent request.

thinkMOAR8y ago

"You can read this article in the next version of Smashing Magazine, completely hosted on Netlify."

No actually quite a few resources are served by third parties.

Zpalmtree8y ago

I read this as Netflix and was very confused for a while.

j / k navigate · click thread line to collapse