HTTP/1 to HTTP/2 to HTTP/3
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- čas přidán 16. 08. 2022
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I learnt so much from this short video..
The history of HTTP made understanding the reasons for its successors to be specced and made this a great progression video rather than just a simple DATA DUMP..
Thank you for making this..
Minor correction about HTTP/2 server push: it's not for updating a resource in the client side. It's a way to proactively send a resource known to be used on the requested resource (like sending a js when a request to an html is made), to avoid one round trip
It's not limited to that. As used by gRPC, for example.
EDIT: I was wrong. Push is a different feature than used by gRPC. HTTP/2 just allows "streaming responses". It's not the same as an independent push, as I assumed.
- Essentially: PUSH_PROMISE allows pre-starting a stream from the server, but client still must start all streams.
- HTTP/2 allows pushing to an existing stream in roughly the same way as long polling in HTTP/1 (but it's less likely to accidentally die, and more).
@@Verrisin I'd argue that using server push for notifying the client of something is violating the HTTP spec.
The HTTP (2 and 3) spec says clearly that it's the server fulfilling requests which it anticipates the client making, so the application layer of the client shouldn't even see those pushes until it itself makes a corresponding request.
Do you have some reference for it being used by gRPC for sending data to the client? (A quick googling just shows people saying "gRPC is not using PUSH_PROMISE", but most of them are already some years old, so things might have changed.)
@@PauxloE I remember reading an article that said gRPC requires HTTP/2 because it's utilizing streams and server push for gRPC streaming.
- I don't know the (gRPC or HTTP) spec, but do know it doesn't work over HTTP/1.
- Maybe it's only using streams and actively polls for responses, but it seems less likely to me, if HTTP/2 can push somehow. (EDIT: It cannot. Pushing into an existing stream opened from a client is roughly the same as just sending more data in a chunked response)
In the end, it's roughly the same, but it's not that _exact_ PUSH feature of HTTP/2.
- One could easily implement an extra stream, that lets server "push" what resource-streams the client should open, for example.
- In the same way, websockets seem effectively built into (/unnecessary over) HTTP/2.
- BUT I am not sure how HTTP/2 handles connections dying and re-establishing, etc. Maybe it's not a drop-in replacement, or there are other gotchas.
@ByteByteGo it would be great if you have sample code NODEJS for this
Learned something new…so I subscribed.
Quality, no fluff, presentation.
Your explanation and animations are simply amazing. They are crystal clear and straight to the point.Thanks a ton for sharing your knowledge. 👏👏👏
So happy to finally find a straight forward explainer on this and why it's important. I'll likely be sharing this and I'm definitely subbing.
Been very looking forward to this, and thank you so much for doing this so clear and concise
I'm so old.
I know
🤝🏼
y
Yes
I'm so stupid
This is the best channel. Look forward to every new video.
Excellent. Thank you - brief, to the point and informative. Love it.
What a efficient content within in 4 min and this is unbelievable. Great work team and Thank you for sharing such great content
I hope this channel gets to grow AF. Valuable and stright to the point content. Congratz on the format!
Keep up the good work guys! I wish this channel existed when I learned my basics.
New sub here! This is my first video & followed you on twitter!
This channel is going places!
Great vid. The concept of streams was being used in the telco field many years ago for signaling applications. Except it was done at layer 4.
Wow, just discovered this channel. Beautifully animated and on a subject I know very little about. Excellent! Subscribed
beautiful arrows, eh ?)))))
those are excellent tutorials. clear, short and straight to the point. the best find in years.
these are not tutorials
@@apidas there you're right, but it depends from where you start.
THIS IS IMPORTANT CONTENT THAT THE SYSTEM DESIGN BOOK DOESN'T TAKE.
Well, If this is so clear. Would you mind to explain how QUIC protocol ensures that packets are not lost and why looses in some streams are insignificant?
Just yesterday I tried to find simple answer to this topic, but I couldn't on any site I've visited, and today this video just popped in my recommendations, and explained everything better in just 4 minutes. Thank you ☺💕
brony :(
Ultra concise. Just the way I like it! Thank you very much.
Short concise and to the point, thank you
HTTP is older than 1996. The first version named 0.9 was released in 1991, when the WWW was created at CERN by Tim Berner-Lee. Before the FORMAL release of HTTP/1, most features were available far before that in various draft states. I would say the HTTP/1 that most of us know and love was shaped around 1994.
I see.
thank you the video was confusing, LOL what was I using in 1993? Should have said "officially"
@@LuigiSimoncini Yup... _that wasn't version 1 yet_
#rekt
Great video, packed with clear information and right to the point 👍🏼
Thank you very much respected fellow, you answer lot of questions in just 4 minutes.
It was the best explanation I have ever seen on this subject
It was a vital info I wanted to understand. Thank you sir for Sharing sincerely and thank you CZcams 🙏 for the priority order.
So glad to find thus channel, keep learning new tech
Great initiative, please keep delivering content like that ❤️
Very clear and informative, thanks
I'm so glad this channel just appear to me, just subsribed+liked+love it!
I work with firewalls and this is a great explanation thanks 👍
Holy .. I learned so much so quickly! Much thanks!
Informative & impressive. Concise & crisp!
Very nice explanation! Very clear and comprehensive! Great animation!
I love your videos. Please keep them coming. I was just wondering if you could share what do you use to create your briliant animations as I would love to put these into my presentations
Thanks for sharing.
Took 4mins to subscribe. Great content!
Http/1/1.1/2 are built on TCP
Http/1.1 introduces "keep-alive" which allows a connection to reuse and avoid the expensive 3 way handshake
Http/2: Http streams and (server) push capability
Http/3 introduces QUIC protocol based on UDP to make stream first class in transportation layer, replacing TCP usage for mobile devices
You're really awesome in explaining it. Thanks ☺
Thanks. Clear and to the point. Well done.
CZcams just recommend me this channel, jewel of explanation, +1 subscriber :D
Wow this was excellent explained and visualized.
The HTTP/3 looks perfect for exceptionally precise user tracking, especially with a direct inbound UDP connection on an end-user device.
Oh- now that you mention it, the connection ID can track users across IPs also adda to it
Easy enough for browser to expire their connection IDs and negotiate new ones say, every 15 minutes.
If you choose to use stateful applications you don’t really get to bitch about them keeping state.
Thank you so much. It is so great, you explained very clear in 4 minutes.
Amazing video. Thank you, God bless you:)
This video has given me more questions than answers.
Apart from the content, the animations and thumbnail are quite good. Cheers to the editor!
Really, really clear explanations. Thank you.
Finally, we get 3 and I enjoy it. Hopefully you do too.
Such an animated presentation! :D
i'm inverting the color video because dark > white for our eyes!
Great short explanations with the visuals.
I like this channel. Great content
High quality content. Good work.
well done
You tutorials are excellent!!!!!
Very informative. Thank you for this video!
So great content.Thank you so much!
Thank you, so helpful explanations
i love your explanations. thank you
Thank you so much for this very informative video and animations
gQUIC started in 2012, so it's takes 10 years to evolve to QUIC in 2020 through to ratification in 2022.
The problem QUIC introduces is that each element of the HTTP/3 request is not a separate request which can be intercepted for inspection for IDP/IDS. This forces secuirty solutions to use endpoint tools for monitoring/blocking, or you just reject UDP/443 and force fallback to allow IDP inspection to take place.
Good clear explanation! I just subscribed!
That's a good visualization, thanks for that.
thanks for to the point tutorials
excellent video..thanks for that.
Thank you for explaining in a nutshell
This 4 minute video is more understandable than the 90 minute lecture I had about this
To the point. Loved it
Thank you very much for your very useful videos!
Thanks for the lesson
Simply wow!
Great lesson .. appreciate it
Keep doing good job
One question, if we are moving to UDP based protocol in HTTP/3, isn't that a problem for reliability? I mean in TCP we have concept of ack for it. Doesn't UDP based protocol have issue with packet loss?
HTTP/3 runs on top of QUIC which handles all of the reliability business :)
Refer to Hussein Nasser video on such topics..
TCP can also experience packet loss, but it's handled for you. And handled quite poorly - data transmission stops until you ACK the received packet. That creates an issue of Head-of-line blocking, mentioned in the video.
The issue is - you are not commonly sending just one packet of data, so why block on one?
QUICK solves this problem, by being way smarter at packet ACKs.
As others have already said, QUIC handles the retransmission for you. In any case, we already use UDP for protocols that should be using TCP (the DNS protocol, for instance). It's not an issue. Back then, networks weren't as reliable as now. Nowadays we can afford to handle retransmission at a higher level because we most likely won't need it as much.
There are many Reliable UDP-based protocols for a long time now, QUIC is one of them
On point! Thanks
I love this guy!
Really good explanation
Thanks so much.
Thanks for sharing this.
Awesome! Thank you
awesome explained and very intuitive video graphics. what tools did you utilize to produce the presentation / visuals ?
Thank you for the clear explanation! Also it's unbelievable that http/3 has been released while /2 merely been used for some years 🤣
QUIC took the ideas from HTTP/2 (multiple streams in one connection), made them more generic, and moved to the transport layer, merging with the encryption.
After QUIC was finally standardized (the process took a while), of course a version of HTTP which uses it had to be published, otherwise it would not be of much use. (HTTP/3 by itself is much simpler than HTTP/2, because it can use the infrastructure provided by QUIC.)
I guess one could have named it "HTTP over QUIC", but they then settled for HTTP/3 instead, as this is more user-intuitive.
All HTTP versions can be used in parallel (assuming servers and clients support them), the semantics towards the applications are still the same (and were recently re-specified in a version-independent way in RFC 9110).
QUIC (and thus HTTP/3) won't be supported everywhere (specifically people behind old routers/firewalls which might not let UDP through), so HTTP/2 is still useful in those cases.
Try making a full fledge course your explaining skills is very good
Thank you for such a great video. Is there a resource to learn about HTTP3 and HTTP2?
Thanks for your sharing
Thank you!!!
Thank you for the video.
I didn't know about QUIC and was wondering how that internet exchange happens between wifi and mobile data
Great video. What software do you use to generate such animation?
Thanks a lot
pipelining = ARQ Go Back N
streams = ARQ Selective Repeat
pd. Correct me if am wrong
what about hybrid?
end users use ordinary http 2 or 1
and http3 are used by internet hopping devices like routers or switches and servers for fast communication
since servers are cpu intensive can transmit alot of data
I always thought QUIC was something separate to HTTP/2~3, Thank you for sharing this
QUIC is in principle independent of HTTP, but it was developed based on a prototype from Google (used as a replacement for HTTP), and its main motivation is for purposes like HTTP. HTTP/3 is using QUIC as its base, and is therefore in itself much simpler than HTTP/2 (which is based on TCP).
I have no choice but subscribed. 😇
0:17 There was an HTTP/0.9, which left out some of the header structure. I think it was very quickly replaced with HTTP/1.0, which regularized the whole request/response structure.
Make a separate video for http3
Nice video, bro.
How do you make the fancy process flow animation?
Well said
Good stuff
Thanks
Nice animations.
Thank you :)
Will a Http 3 REST API call be faster than GRPC?