<< 21-07-2016 >>
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00:29:55dyce_anyway to take a iterator and convert it do a sequence by using some function (or list comprehension)
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00:38:53ephjadyce_: yes http://nim-lang.org/docs/sequtils.html#toSeq.t,expr
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05:06:44dyce_how would you secure a route using jester? is there a simple session implementation?
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09:41:46federico3RedMonk language ranking 2016
09:41:50federico3http://redmonk.com/sogrady/2016/07/20/language-rankings-6-16/
09:46:35euantorYeah, I noticed Nim on there, still pretty low down unfortunately
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09:49:19Flox42well, I am just guessing, but it might have something to do with the maturity of nim. At least that's one reason why we almost stopped using nim in our company.
09:50:53ftsfanyone know of a gif encoder in nim? or easily wrapped?
09:52:23Flox42ftsf: nope, sorry
09:55:01AraqFlox42: please give some details. it is bugs? missing features? people discussing language breaks?
09:57:17ftsfFlox42, ahh well, good excuse to figure out how to write one i guess =)
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10:00:54Flox42to be clear, I think nim is fantastic as a system language, but for us some bugs (memory leaks) related to async/await in conjunction with jester and threads not working well with async/await (asynchttpserver) are currently a game breaker. furthermore the standard library is nice and growing, but we are still missing some things like a good websocket implementation (I know niv's implementation, but that is not working well with
10:00:55Flox42threads).
10:03:21Flox42and yes, nim is open source and everyone is invited to contribute, but my daily business doesn't give me much spare time.
10:05:21euantorFor me the biggest problems right now are a lack of libraries (though the standard library is great, there are some stuff very particular to what I do).
10:05:46euantorI also prefer static linking, but that's not exactly a deal breaker.
10:06:13euantorWe're using Nim at work for some small tasks (see my migrate library/tool - we use it internally to manage all database changes at work).
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10:07:02euantorIdeally, we can extend that out, and perhaps write libraries in Nim that we can interface to from C# (should already be possible thanks to Nim's brilliant FFI) which is our current main language
10:14:27Flox42currently we are mainly using C/C++, Java, JavaScript (node.js) and Go. right now we favour Go over nim for microservices and operating hardware ... and I am really missing nim's interopability with C stuff.
10:14:53cheatfateFlox42, why you need threads? for speed?
10:17:07Flox42I had to use threads support when writing windows services, for instance
10:19:21cheatfateFlox42, still can't understand
10:21:06cheatfateYou can write threads and talk to thread which run asynchttpserver via channels for example
10:22:03cheatfatewindows version of asyncdispatch is more threadsafe then posix variant
10:25:10Flox42Flox
10:25:11Flox42I am trying to use an asynchttpserver in a thread and get the following compile error for the callback: 'cb' is not GC-safe as it accesses 'nameIterVar' which is a global using GC'ed memory. Is there any way around this?
10:25:12Flox42Flox
10:25:13Flox42I am using jester already in a thread, which works fine. now I want to start a asynchttp for websockets in the same thread, which gives me the above error.
10:25:13Flox42Flox
10:25:14Flox42so, I can't really use asynchttpserver or libraries that use asynchttpserver and async calls when using --threads:on?
10:25:15Flox42dom96 (IRC)
10:25:15Flox42Araq: ok, will add nodecl
10:25:16Flox42Flox42: right now it's not officially supported I'm afraid.
10:26:26euantorWe use Go a fair bit too, mostly when working with hardware (GPIO on a Raspberry Pi for example)
10:26:49euantorI am writing a Nim library to access the pins on a Pi though, so hopefully that piece of code will get ported accross soon-ish
10:27:24cheatfateAnswer to your first question is - stop using global variables, try other technique
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10:31:33cheatfateFlox42, and if you trying to use https://github.com/niv/websocket.nim, its mostly looks like PoC not by ready to use library
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10:32:00cheatfateso its better to borrow some code from it and adopt your your server
10:32:19AraqFlox42: the known memory leaks were all gone with the latest release. is it still an issue? did you try it?
10:32:26Flox42cheatfate: yes, but I only instantiated a asynchttpserver with a callback doing nothing in a thread
10:32:51Flox42Araq: I have to check it, haven't done it yet
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10:36:14cheatfateFlox42, could you show example of your callback setup and callback code?
10:36:16Flox42this is what I am doing in a thread function: https://zerobin.tarakis.de/?32ee4bfad197993f#gWeII0CV37Gq73ofoYmJVDZfcf5eosR+QXcG723BTuI=
10:37:07Flox42and this is the error I get when compiling:
10:37:08Flox42lib/pure/asyncdispatch.nim(1596, 8) Error: 'cb' is not GC-safe as it accesses 'nameIterVar' which is a global using GC'ed memory
10:38:14cheatfateFlox42, so you have tried to instantiate 2 asynchttpserver's in one thread?
10:38:28Flox42yes
10:38:56Flox42I want to have one for my REST api and one for websockets on different ports
10:41:39cheatfateFlox42, try to use https://github.com/andreaferretti/rosencrantz/blob/master/rosencrantz/core.nim#L60-L85 this kind of conversion for your request handler proc
10:44:45Flox42thanks, will try
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10:56:13Flox42as I am not needing a context, the following should be sufficient?
10:56:14Flox42proc handle*(): auto =
10:56:14Flox42 proc server(req: asynchttpserver.Request): Future[void] {.async.} =
10:56:15Flox42 discard
10:56:16Flox42 return server
10:56:33Flox42ah, indentation got lost
10:56:47Flox42it gives me the same error
10:59:37Flox42https://zerobin.tarakis.de/?dff825b144eb3acd#2oXKohi0FsrvpgmS/pNHlZIrA7xpAHYGrd511A4SjpU=
11:04:35cheatfatecould you give me exact output of nim compilation
11:05:24cheatfatebecause error you mentioned must not be alone
11:15:51Flox42oh oh
11:16:33Flox42my bad, error went away, even with standard asynchttpserver. the problem is really in the websockets library
11:18:07Flox42so, all my bad. websocket libraray has some globals
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11:19:43cheatfatemaybe we need to sanitize packages inside of nimble?
11:21:14Flox42well, I forgot to remove the import for websocket
11:23:44Flox42I guess for further tests I have to use the websocket library directly and change it according to my needs. however, I don't feel like I can really use this in production yet. maybe if I have some more time I can contribute to the websocket library.
11:25:00AraqFlox42: fair enough, thanks for the feedback.
11:25:11cheatfateFlox42, current websocket `library` is looks like PoC, so you need to write your own
11:25:26Araqcheatfate: your 'wanted' package needs websocket support :-)
11:25:48flyxSO starts Documentation today. sadly, it tells me that the nim tag „is too new or too low activity“. we should post more on SO ;) http://blog.stackoverflow.com/2016/07/introducing-stack-overflow-documentation-beta/
11:26:09cheatfateAraq, it will have it in future... currently i'm stuck in parsers of http protocol
11:26:59cheatfateand wanted is not a package :) its PoC
11:29:49cheatfateAraq, and i'm already tired of it... :(
11:30:32euantorJust found wanted, looks interesting
11:31:52cheatfateeuantor, currently `wanted` its just a way to speed up asynchttpserver 2x
11:32:25euantorInteresting. I've not played much with the HTTP server stuff in the stdlib yet. I've used the client a bit, but not the server
11:32:48euantorA x2 speed increase sounds like a pretty major enhancement though
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13:28:47Flox42yeah, 'wanted' looks interesting
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17:50:26ftsfhmm no signum/sign/sgn function?
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22:31:52dyce_what would be a simple pattern for simple authentication in jesteR?
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22:34:06dom96dyce_: how simple is simple? :)
22:34:24dom96You can take a look at NimForum's source for an example
22:34:48dyce_dom96: http://flask.pocoo.org/snippets/8/
22:35:02dyce_does WWW-Authenticate do some magic?
22:35:18dyce_so if you authenticate once, you get access to a few routes?
22:35:37dyce_and also is it possible to see what ip the client is?
22:35:55dom96jester doesn't deal with authentication at the moment
22:36:01dom96but I think you can access everything you need via the headers
22:36:23dom96as for IP: https://github.com/dom96/jester/blob/master/jester.nim#L56
22:36:42dyce_dom96: alright cool, lol i was looking at host
22:38:09dyce_dom96: theoretically, how could you make a session? would you have a sessiontable and generate a session ID based off some client's useragent, ip, etc
22:38:33dyce_would that be enough to prevent session hijacking?
22:39:22dom96I would just hash the password + ip and store that in the client's cookie
22:39:41dom96but I'm not sure what the best practices are
22:39:55dyce_but then i will have to code a 'our site uses cookies' and i might goto jail :)
22:40:00dyce_if i dont
22:40:15dyce_yeah i dont know any best practices either
22:40:29dom96I'm still fine and the nim forum doesn't show that stupid message.
22:40:37cheatfatehashing password is a bad practice
22:40:59Xecheatfate: [citation needed]
22:41:34dyce_well you should salt it and hash it again
22:42:15dom96using a salt is a good practice when hashing in general
22:43:25dyce_for my use, i think i will make a table of authenticated sessions, with ip+unique client info with a timestamp of when it was authenticated. and each request will do a lookup and verify the session is still valid (was auth'd within 1 hour)
22:43:49dyce_not sure how secure that would be
22:43:54dyce_any thoughts?
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22:48:30cheatfatehttps://hueniverse.com/2015/07/08/on-securing-web-session-ids/
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