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lpereira
Implement HTTP/2
And possibly websockets
On Jan 8, 2014, at 6:20 AM, "Leandro A. F. Pereira" [email protected] wrote:
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Hi,
I guess not too much progress on this one? Will some existing C libs be of any help(https://github.com/warmcat/libwebsockets https://github.com/tatsuhiro-t/nghttp2 and https://github.com/devsisters/libquic)? Or integrating a new protocol in lwan will require a separate implementation?
I'm not sure I'll have the time to contribute myself, but will try to find some.
Not sure you can really rely on an external library for such an important part of the web server?
One of the advantages of lwan is that it's pretty small, and one could be looking at those implementations for inspiration, while reimplementing/integrating it in lwan, but the bad thing is that quic and http2 are a moving target(http2 it's almost there now), so the contributor would have to maintain and update the lwan implementation, i'm not ready for such a commitment.
I'm wondering what @lpereira has to say about it. Lwan seems to make wonders with http1.1, it would be interesting to see what can be done with quic/http2.
Update:
Had a chance to look into the libquic implementation, and it's quite big with quite a few dependencies, and as far as I've seen it's mostly c++. It definitely won't fit the lwan's approach of parsing the requests. Probably one of the hardest parts in the http2/quic implementation are the binary request headers(fast and without allocations), and that quic works over udp and has it's own congestion mechanisms, basically reimplementing tcp over udp. Probably it would have been possible to reuse some parts of the http2 implementation(like header parsing) in the quic implementation. This all seems like a lot of work, and refactoring.
For WebSockets, this blog post seems quite nice: https://blog.pusher.com/websockets-from-scratch/
For HTTP/2 I'd write everything myself, like I did with HTTP/1. This video is a nice one as well, although from the client side.
I was looking for a web server that I can easily extend with C/C++ code but I really need websockets. Is there any change of getting websockets in lwan ? Anything I can do to help ?
@mcirsta There's a chance, yes, but since I don't need it at the moment and I've been pretty busy with other personal projects, it's quite unlikely I'll implement it soon. I'm not against having it, though, so if you'd like to give the implementation a try I'll gladly help you.
Thanks, the problem is that I'm looking for something that will just work. Implementing this for lwan would take me too much time and I need to develop an IoT gateway too ( for wich I need websockets ). I've found some solutions out there that have websockets working so I'll try those.
@lpereira HTTP/2 seems to be finalized now, how about getting HTTP/2 support for the next LWAN milestone ?
There are many reasons I haven't implemented this yet, and the major one is that I'd like to work on other less demanding projects.
If I were to implement this, I'd write everything myself instead of using libraries. And this is going to take a lot of time I don't have any more.
On Mon, Feb 27, 2017, 14:44 Justin Yeap [email protected] wrote:
@lpereira https://github.com/lpereira HTTP/2 seems to be finalized now, how about HTTP/2 support for the next milestone ?
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Just a curious question @lpereira , do you consider lwan a very demanding project ? Also if you guide me, I might want to help implement.
Right now, no, Lwan isn't very demanding -- it's in a maintenance state. However, before that, yeah, I'd work on it almost every free waking hour. I don't think you're ready to implement HTTP2 yet, but keep fooling around and eventually you will.
@lpereira Do you happen to know where is your http implementation in lwan ? which file persay
Read this blog post here. It won't say which files implement what, but there are some code excerpts. Then you can use git grep to look around.
Websockets is now being tracked on #230. An experimental version has been pushed.
I'm taking a break from Lwan, so it's unlikely this will be implemented anytime soon. Please remember that this is an open source project, so if you'd like to have this implemented, you can step up. I'm willing to work with people that's implementing this feature.