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Message |
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mishanti1 |
The Netherlands welcomes Trump : https://www.youtube.com/watch?v=ELD2AwFN9Nc |
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| 12:33 |
sdeseille |
hello |
| 12:37 |
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| 12:38 |
sdeseille |
I want to use db handler in mojolicious app. What is the recommanded method to use ? Today i added attribute returning a new db handler each time we call it. |
| 12:39 |
bpmedley |
sdeseille : https://github.com/kraih/mojo-pg/blob/master/examples/chat.pl |
| 12:40 |
bpmedley |
sdeseille : See how the helper is used with a state variable? |
| 12:43 |
sdeseille |
great ! thank you |
| 12:44 |
sdeseille |
ok i see the state |
| 12:48 |
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| 12:50 |
sdeseille |
state is something coming with Perl 5.10 ? |
| 12:55 |
ashimema |
yup: http://perldoc.perl.org/functions/state.html |
| 12:56 |
janl |
I have used state! |
| 12:58 |
nic |
It's important to think about the granularity/scope of each db connection |
| 12:58 |
CHYC |
Don't you want to get a new db handler every time you call the attribute? Getting the same one gums up the works with non-blocking, amongst other things. |
| 12:58 |
* sri |
loves Mojo::DOM so much |
| 12:58 |
nic |
A lot of beginners try to make one db connection last forever and forget that the server or network can kill that connection |
| 12:58 |
sri |
dealing with xml web services without it would be such a nightmare |
| 12:59 |
* nic |
concurs |
| 13:00 |
* ashimema |
is always keen listen in on db connection discussions.. especially when they involve some mention of non-blocking.. it's an area he still doesn't feel he has full grip of |
| 13:01 |
sdeseille |
I understand |
| 13:01 |
sdeseille |
i don't want to open too many connection on database in fact |
| 13:02 |
sdeseille |
i'm working on little interface that will be use by few admin |
| 13:03 |
sdeseille |
you right when you say i will have to manage network failure and database connection failure |
| 13:05 |
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| 13:25 |
bobkare |
A pattern I've used a few times for services with intermittent usage is to have a helper that sets up a db connection and saves it in a state variable if it doesn't have one, and also sets up a timeout to close it on a few seconds of inactivity. It could trivially be expanded to also check that the connection is still live |
| 13:34 |
sdeseille |
ok it is interesting |
| 13:47 |
jberger |
Mojo::Pg is a connection pool |
| 13:48 |
ashimema |
I thought that :) |
| 13:48 |
jberger |
You can set the max number of connections too |
| 13:49 |
jberger |
sri: agreed on Mojo::DOM |
| 13:49 |
jberger |
Using it in a few places at work already |
| 13:50 |
jberger |
Used it at the last job too come to think of it |
| 13:52 |
sdeseille |
i will use Oracle because it is rdbms at work :( |
| 13:53 |
jberger |
I'm sorry |
| 13:53 |
sdeseille |
snif |
| 13:57 |
jabberwok |
%SYS-U-ENTRAILS: Oracle requires increased offerings for these readings to be deciphered. |
| 13:58 |
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| 14:01 |
sdeseille |
i'm going to make a sacrifice and hope to be touch by the lord |
| 14:09 |
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| 14:21 |
sdeseille |
bobkare: have you an example with timeout settings ? |
| 14:24 |
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| 14:26 |
nic |
establishing a connection to oracle is still fairly expensive, so usually merits a connection pool |
| 14:27 |
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| 14:28 |
sdeseille |
where can i start to study that case ? |
| 14:35 |
bobkare |
sdeseille: https://0bin.link/paste/vp2mA6Db#JIKB3Z1EQVevh71gGTskkfNZohcyHENxrbotPgLncCs |
| 14:37 |
sdeseille |
thanks i'm opening the door of async coding :) |
| 14:43 |
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| 14:56 |
genio |
https://www.w3.org/TR/2017/REC-WebCryptoAPI-20170126/ is now a recommendation |
| 15:02 |
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| 15:19 |
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| 15:21 |
sdeseille |
if i load value from config file in main package , how can i use that value in a plugin ? |
| 15:21 |
pink_mist |
give the value to the plugin when you load it |
| 15:23 |
sdeseille |
i call my plugin like that $self->plugin('Heidi::Helpers'); Should i have to add parameters with Plugin name ? |
| 15:24 |
sdeseille |
ok i just read the chapter about plugin in doc |
| 15:25 |
jberger |
the plugin's register method gets called with the $app as an argument |
| 15:25 |
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| 15:26 |
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| 15:26 |
sdeseille |
ho i named that $self in my startup sub |
| 15:26 |
sdeseille |
it is the reason you see $self |
| 15:27 |
pink_mist |
the name doesn't matter |
| 15:27 |
pink_mist |
as long as you know what it represents |
| 15:27 |
sdeseille |
i understand. |
| 15:28 |
sdeseille |
is it a best practices to named it $app ? |
| 15:29 |
pink_mist |
jberger likely used $app when he explained because you'd be expected to understand what he meant |
| 15:29 |
pink_mist |
you can use whatever name makes the most sense to you |
| 15:29 |
sdeseille |
ok thanks |
| 15:29 |
pink_mist |
if he just said it gets called with $self as an argument, you'd have no idea what that $self meant |
| 15:30 |
sdeseille |
i see |
| 15:30 |
jberger |
yes, we use $app by convention to talk about an instance of the application |
| 15:30 |
jberger |
$c for an instance of a controller, etc |
| 15:31 |
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| 15:31 |
jberger |
plus, in the plugin's register method the invocant (the first argument) is the plugin instance itself, and the invocant is usually called $self if anything is |
| 15:44 |
sri |
btw. did really nobody like my query param route constraint idea? |
| 15:45 |
pink_mist |
I did like it, but I've not got a usecase for it myself |
| 15:45 |
sri |
get '/foo/api/v1/lalala' => (params => {test => qr/\d+/, bar => ['a', 'b', 'c'], baz => 'yada'}) |
| 15:45 |
sri |
the use case i had was mock apps in tests |
| 15:47 |
sri |
like, in an app i'm testing right now i have mock tests like this https://gist.github.com/anonymous/6072ce53f4c3fe962e45fe9fffc8de15 |
| 15:47 |
sri |
the same route needs multiple versions with different query param variants |
| 15:48 |
sri |
currently i need to give it a closure and check $c->req->url->query->... |
| 15:48 |
sri |
and have multiple render calls |
| 15:49 |
sri |
get '/public/source/home:kraih/perl-Mojolicious' => (query => {expand => 1}) => {text => <<'EOF'}; |
| 15:50 |
sri |
that would be the version with ?expand=1 |
| 15:50 |
sri |
get '/public/source/home:kraih/perl-Mojolicious' => (query => {rev => qr/^\d+$/}) => {text => <<'EOF'}; |
| 15:50 |
sri |
or one that matches a numeric ?rev=123 |
| 15:57 |
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| 17:13 |
sri |
well, for now i'll add this to my tests https://gist.github.com/anonymous/1626dde7cdcc9f3fc08ee0b17276785d |
| 17:13 |
sri |
¯\_(ツ)_/¯ |
| 17:14 |
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| 17:15 |
kgoess |
if I wanted to launch a dozen $ua->gets in parallel, and wait until I've collected all the results before continuing, is there an idiom for that? |
| 17:15 |
kgoess |
or am I thinking about it wrong? |
| 17:15 |
sri |
ioloop delays |
| 17:15 |
Grinnz |
https://metacpan.org/pod/Mojolicious::Guides::Cookbook#Synchronizing-non-blocking-operations |
| 17:16 |
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| 17:17 |
sri |
don't start too many though, better use a queue if it's more than a dozen |
| 17:17 |
kgoess |
I'm migrating some old code into mojo, and the $ua->gets are in the middle of the processing--that means I'd have to move all the code that follows the $ua->gets into the second sub{}, right? |
| 17:17 |
Grinnz |
yes |
| 17:18 |
Grinnz |
otherwise they'd execute before the gets are complete |
| 17:18 |
sri |
i actually just wrote and example for a download queue with fixed concurrency https://github.com/openSUSE/desktop-file-translations/blob/master/50-tools/lib/SUSE/DesktopFileDownloader.pm#L66-L84 |
| 17:18 |
kgoess |
$delay->wait there doesn't actually wait, though, right? |
| 17:19 |
Grinnz |
not if you are already in a running event loop |
| 17:19 |
sri |
in my cases it does, since the script runs stand-alone |
| 17:20 |
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| 17:27 |
jberger |
sri: nice, that's more readable than my URLQueue gist |
| 17:27 |
jberger |
and re the query mock stuff, I'm not sure that would be quite enough |
| 17:28 |
sri |
and it doesn't even use all the pretty features we added in the last few weeks :o |
| 17:28 |
jberger |
I usually trap more things that that in my closures |
| 17:29 |
jberger |
I was trying to figure out how you could use __SUB__ in that queue |
| 17:29 |
sri |
Mojo::File and $tx->result would make it much better |
| 17:29 |
jberger |
yeah |
| 17:29 |
jberger |
__SUB__ can't work because you need the outermost one |
| 17:29 |
jberger |
though I guess it would mean that it wouldn't close over itself |
| 17:31 |
jberger |
oh, and mine did need to check the queue size and grow again, because it was a spider |
| 17:31 |
jberger |
yours doesn't need that |
| 17:32 |
* jberger |
always wants his code to be as clean as sri's, which is why I start looking when mine isn't :D |
| 17:32 |
Grinnz |
eek! spiders |
| 17:40 |
sri |
i really like Term::ProgressBar |
| 17:40 |
sri |
always using it in these kinda scripts now |
| 17:43 |
sri |
but i might have mentioned that before ;p |
| 17:47 |
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| 17:48 |
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| 18:04 |
[vlad] |
how do i add one Mojo::DOM object to another as a child? append_content adds it after and append doesn't seem to do anything. |
| 18:05 |
Grinnz |
append_content should be the one |
| 18:06 |
Grinnz |
are you sure you're calling append_content on the node you want to add it to and not a parent or something? |
| 18:06 |
[vlad] |
pretty sure |
| 18:06 |
purl |
pretty sure is the case, I did one of the early versions of ->populate and as I recall it was like that |
| 18:06 |
[vlad] |
nopaste? |
| 18:06 |
purl |
nopaste is http://paste.scsys.co.uk/ or http://gist.github.com/ or DO NOT USE pastebin.com IT FUCKING SUCKS or the command-line interface to App::Nopaste |
| 18:10 |
bwf |
Did purl just violate the Code of Conduct? :) |
| 18:10 |
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| 18:12 |
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| 18:13 |
[vlad] |
http://paste.scsys.co.uk/545384 |
| 18:13 |
sri |
that's the root node |
| 18:13 |
[vlad] |
it is |
| 18:13 |
sri |
http://mojolicious.org/perldoc/Mojo/DOM#NODES-AND-ELEMENTS |
| 18:14 |
sri |
you add content to the root node |
| 18:14 |
sri |
not the select element |
| 18:15 |
sri |
->at('select')->add_content(...) |
| 18:15 |
[vlad] |
thanks |
| 18:16 |
sri |
s/add/append/ |
| 18:29 |
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| 18:45 |
jberger |
bwf: I know you're joking, but swearing isn't on the code of conduct |
| 18:45 |
jberger |
targeted at others it could well be, because it could be abuse |
| 18:45 |
jberger |
but not in general |
| 18:46 |
jberger |
purl: forget pretty sure |
| 18:46 |
purl |
jberger: I forgot pretty sure |
| 18:47 |
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| 19:00 |
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| 20:13 |
coolo |
sri: the library Net::AMQP used by the rabbitmq client is just bogus :( |
| 20:13 |
coolo |
it starts with the header. |
| 20:13 |
coolo |
AMQP . pack 1, 1, $MAJOR, MINOR |
| 20:14 |
coolo |
but the spec clearly says: AMQP 0, $MAJOR, MINOR, REVISION |
| 20:15 |
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| 20:18 |
sri |
coolo: did you find out yet why it worked before you added tls? |
| 20:21 |
sri |
even if Net::AMQP is somewhat broken, pretty much all AMQP clients on cpan depend on it, so i would expect for it to work at least somewhat reasonably well |
| 20:22 |
sri |
from what i see in the open issues, perhaps Mojo::RabbitMQ::Client just encoded something wrong |
| 20:23 |
sri |
https://rt.cpan.org/Public/Dist/Display.html?Name=Net-AMQP |
| 20:25 |
coolo |
sri: there is almost no protocol code in that class - all it does write($stream->raw_frame) |
| 20:26 |
coolo |
sri: the packages sent to the amqp:/ look reasonable (beside the header, which seems to be ignored by rabbitmq :) - but the packages sent to amqps:/ are somewhat broken |
| 20:26 |
coolo |
wireshark reports unknown method |
| 20:27 |
sri |
it's not haproxy trying to rewrite the data? |
| 20:28 |
sri |
no wait, you tried other clients |
| 20:29 |
sri |
you could test Net::Async::AMQP for comparison |
| 20:30 |
sri |
it also supports ssl, and uses Net::AMQP |
| 20:45 |
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| 20:54 |
* coolo |
struggels to understand the api :( |
| 20:56 |
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| 20:59 |
coolo |
ok, made it work - and it works |
| 21:04 |
sri |
good, that means it's fixable :) |
| 21:04 |
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| 21:07 |
sri |
both clients share pretty much all of the underlying modules |
| 21:13 |
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| 21:23 |
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| 21:27 |
coolo |
sri: yeah. but the 2nd frame already has the wrong length |
| 21:36 |
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| 22:08 |
coolo |
sri: this is really strange. I added debug output to IOLoop::Stream and what is written with syswrite there is not what we get with tcpdump on the server |
| 22:08 |
coolo |
but only one byte replaced with 2 others. the rest is fine |
| 22:10 |
coolo |
oh no, there is another byte |
| 22:11 |
* coolo |
gives up |
| 22:11 |
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| 22:13 |
sri |
starting to wonder if something about the way we deal with IO::Socket::SSL might have the potential to corrupt the data |
| 22:14 |
sri |
would be nice if you could collect the specific data that gets corrupted |
| 22:14 |
sri |
coolo: makes it easier to test |
| 22:22 |
sri |
data corruption would be a really serious problem for the whole framework |
| 22:23 |
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| 22:28 |
jberger |
? |
| 22:29 |
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| 22:34 |
sri |
jberger: coolo is setting up rabbitmq with ssl, and Mojo::RabbitMQ::Client doesn't work anymore |
| 22:34 |
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| 22:34 |
sri |
it's set up with a haproxy for ssl termination, and apparently the data gets corrupted somehow |
| 22:35 |
sri |
Net::Async::AMQP seems to work |
| 22:36 |
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| 22:41 |
sri |
hmm |
| 22:41 |
sri |
http://perldoc.perl.org/5.8.8/functions/syswrite.html |
| 22:42 |
sri |
just noticed the warning at the end |
| 22:42 |
sri |
"Note that if the filehandle has been marked as :utf8 , Unicode characters are written instead of bytes..." |
| 22:47 |
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