--- Log opened Tue May 03 00:00:50 2011
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00:26 < plexdev> http://is.gd/kXkeqi by [Robert Griesemer] in go/doc/ -- go
spec: clarify semantics of integer division
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01:13 < plexdev> http://is.gd/9Wk9e4 by [Robert Griesemer] in go/doc/ --
godoc: if there is no search box, don't run the respective JS code
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03:16 < plexdev> http://is.gd/DhE2MG by [Brad Fitzpatrick] in go/src/pkg/os/
-- os: remove race paranoia from Environ(); it's guarded now
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03:48 < plexdev> http://is.gd/SdOHiR by [Andrew Gerrand] in go/doc/ --
doc/install: specify clone -u instead of -r
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07:06 < dfc> is this a known issue ?
07:06 < dfc> http://code.google.com/p/go/issues/detail?id=1776
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07:20 < uriel> dfc: if it is in the issue tracker I'd say it is 'known'
07:21 < dfc> well, i was the one that logged it :)
07:22 < dfc> i wanted some advice if anyone else had hit this issue
07:22 < dfc> i ran into it using gomysql to create a client conn inside
init()
07:22 < dfc> I thought that all goroutines that were started in init() were
dormant until main() kicks off
07:23 < |Craig|> I'd guess thats caused by net having an init (or something
is uses) that it needs which has not run yet
07:23 < |Craig|> but thats just a wild guess on my part
07:23 < dfc> net internally uses a goroutine to handle select(2)
07:24 < dfc> and recently Dail was made non blocking
07:24 < Namegduf> Hmm, that is an interesting consequence.
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07:26 < Namegduf> The issue is in your printed stack
07:26 < Namegduf> It isn't that it spawned a goroutine.
07:27 < Namegduf> It's: runtime.chanrecv(0xf8400253c0, 0x21b9bb0, 0x0, 0x0,
0x0, ...)
07:27 < Namegduf> It's gone to sleep waiting on another goroutine during
init
07:27 < Namegduf> But the other goroutine will never run.
07:27 < Namegduf> Special case of a deadlock.
07:28 < dfc> because it's inside init() and main hasn't started yet
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07:28 < Namegduf> Yep.
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07:28 < dfc> hmm, so, at its heart you can't use chan <- value inside
init()
07:28 < Namegduf> Not a blocking one.
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07:29 < Namegduf> Nor a blocking value <- chan.
07:29 < Namegduf> Blocking means yielding until another goroutine acts,
which never happens.
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07:30 < dfc> ahh
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07:30 < dfc> and because it's blocking
07:30 < dfc> you end up at the scheduler
07:30 < Namegduf> Yep.
07:30 < dfc> and it freaks out because it's inside an init context
07:30 < Namegduf> Which it has to do because init will never be woken up
07:31 < Namegduf> Because no other goroutines start until it is done.
07:31 < dfc> because all goroutines are asleep
07:31 < dfc> catch 22
07:31 < Namegduf> I wonder if you could use cgo to get at blocking network
I/O, heh.
07:31 < uriel> as far as I know, you really shouldn't be doing that kind of
stuff in init()
07:31 < Namegduf> (Obviously not a good solution here, just an interesting
thought)
07:32 < dfc> i'll update the issue with what I was *trying* to do
07:32 < Namegduf> Well, it looks like you can't do it in init.
07:32 < dfc> ie, not come up with nasty corner cases
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07:32 < Namegduf> WorkingAsIntended?
07:32 < Namegduf> Or WontFix?
07:33 < Namegduf> It is a bit annoying I guess to have to do that kind of
stuff separately, but hard to fix.
07:33 < Namegduf> Concurrent init would simultaneously be cool and make a
lot of things a lot more annoying
07:34 < Namegduf> And thus is probably not worth it.  :(
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07:35 < dfc> Namegduf: and making the chan inside pkg/net noblocking would
add a lot of complexity for this edge case
07:36 < Namegduf> Wouldn't solve it.
07:36 < Namegduf> The reason it crashes is that it's getting into the
scheduler
07:37 < dfc> but its going into the scheduler because the chan is synchronus
07:37 < Namegduf> But the reason it's waiting on a channel is that goroutine
2 there is handling I/O
07:37 < Namegduf> You could busyloop on the channel doing non-blocking reads
all day and you still wouldn't have a connection.
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07:38 < dfc> anyhoo
07:38 < Namegduf> It'd just need to do non-blocking I/O, which would add a
lot more complexity just for init.
07:38 < dfc> WontFix or YourDoingItWrong will suffice for this issue
07:38 < Namegduf> Er, blocking I/O
07:38 < Namegduf> Is that second one a real classification?
07:38 < dfc> probably not, but the resolution status appears to be free text
07:39 < dfc> i've seen new ones added over time
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07:44 < wrtp> http://code.google.com/p/go/issues/detail?id=583
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07:46 * uriel still doesn't see the point of doing something like this in init
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07:46 < uriel> do we really want packages opening connections and stuff like
that in init?  don't think so
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07:53 < wrtp> uriel: the point is not really about making connections, but
that it can be idiomatic in Go to use goroutines to get stuff done...  and you
can't do that in the init phase
07:53 < uriel> wrtp: that is true, but still, I think init() is quite
special, and to let people run arbitrary code in init might be counterproductive,
but maybe I'm wrong
07:56 < wrtp> uriel: problem is you don't know what a package is doing under
the hood - a pkg func you call at init time might work one time, and some time
later it might fail because the author started using goroutines
07:56 < wrtp> personally, i don't see any problem with running arbitrary
stuff at init time
07:56 < wrtp> i don't see that it would be any harder to debug than running
arbitrary stuff at any other time
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08:04 < uriel> wrtp: that is a good point
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08:04 < uriel> maybe you are right
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08:04 < uriel> still, i fear init() might end up being abused, I don't like
too much crazy magic stuff to happen as soon as I import something
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08:08 < mpl> off the top of their head, does anyone know how to disable
compression on the remote when git pulling?
08:09 < taruti> mpl: you are writing git in go?
08:09 < mpl> no.  just using git.  as many ppl do here I suppose.
08:10 < mpl> and I occasionnaly put pics on my store-everything git repo.
when that happens it's pretty useless that git tries to compress them before
sending them.  it just stresses the poor cpu on my server for nothing while I have
plenty of b/w.
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08:28 < taruti> who was the one writing git in Go?
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08:30 < edsrzf> I've written a little Git in Go
08:31 < taruti> edsrzf: link to your repo?
08:31 < edsrzf> https://github.com/edsrzf/go-git
08:31 < mpl> I'm getting error messages such as
sqlite.go:7[_obj/sqlite.cgo1.go:10]: inconsistent definition for type reflect.Type
during import
08:31 < taruti> thanks
08:31 < edsrzf> It's not really in any sort of usable shape
08:31 < mpl> when building gosqlite, anyone seen that?
08:32 < vegai> the go libraries do not have any sort of version dependency
system, do they?
08:32 < vegai> has anyone talked about implementing one?
08:33 < edsrzf> mpl: It probably means that you have different packages
linked with different versions of the reflect package
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08:33 < royger_> how can I set a reflect.Value to nil?
08:34 < edsrzf> val = reflect.NewValue(nil)
08:34 < edsrzf> I'm not sure if that's the idiomatic way to do it or not
anymore.
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08:34 < royger_> gofix didn't get that
08:34 < royger_> edsrzf: thanks
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08:35 < mpl> edsrzf: I'm not using reflect myself, just importing gosqlite.
08:35 < royger_> edsrzf: reflect.NewValue is no longer
08:35 < edsrzf> Oh, right.  reflect.ValueOf(nil)
08:35 < edsrzf> I forgot its name changed.  :)
08:36 < royger_> edsrzf: niceee
08:36 < edsrzf> mpl: Probably your gosqlite was compiled against a different
version of the reflect package than your other packages
08:38 < mpl> edsrzf: ah forget my last sentence, I'm getting that error when
building gosqlite itself, so it has nothing to do with me importing it in my
project.
08:38 < royger_> is there an online godoc server with pages up to date to
latest changes?
08:39 < edsrzf> royger_: tip.goneat.org/pkg
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08:41 < royger_> edsrzf: thanks again
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09:08 < mpl> edsrzf: nm, my go tree was not recent enough, all's well with
the weekly.
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10:57 < xyproto> Is Go better than C++ for large projects, in other ways
than just that it compiles quickly?
11:00 < vegai> Yes.
11:00 < xyproto> and in other ways than the type system?
11:00 < vegai> ...  Yes.
11:01 < vegai> (I'm not helping, am I?)
11:01 < xyproto> vegai: well, that depends: Is this sentence false?  :P
11:03 < xyproto> no, wait, it's "This sentence is false".  (ref both Liar
Paradox and Portal 2)
11:06 < vegai> sadly, I've avoided large C++ projects
11:06 < vegai> or in fact all large projects
11:06 < uriel> flipping bits with a magnet is better than c++ for large
projects (and small ones)
11:06 < vegai> wait, that's not sad
11:06 < uriel> vegai: that is indeed not sad, that is very lucky
11:08 < vegai> it is
11:11 < xyproto> I agree on the C++ critisism, but I tried to convince a
college during lunch today, with no luck.  The supremacy of the visual studio
debugger was his main argument.
11:11 < xyproto> (that C++ is not great for large projects, and that Go
might be better)
11:12 < vegai> he's right that you need a good debugger if you code in C++
:)
11:12 < xyproto> Having a solid argument for why exactly Go is better for
large projects would be great
11:12 < xyproto> vegai: yeah :)
11:12 < kimelto> is it?  :)
11:12 < vegai> Go both encourages and embodies simplicity
11:12 < vegai> and simplicity is good
11:13 < vegai> if your opponent doesn't agree with that, I'm not sure what
to do
11:14 < xyproto> vegai: good one, but he's been programming C++ for the last
10 years (at list).  Every argument that I can't provide at least 42 references
for, won't fly.  ;)
11:14 < xyproto> *at least
11:14 < kimelto> so it is not for big project as big tends to be the
opposite of simplicity.  bleh ;p
11:14 < vegai> after 10 years of experience, he's probably pretty good in
C++
11:14 < vegai> so it might very well make sense for him to use it
11:14 < xyproto> The quick compilation of Go is a good argument.  It's easy
to demonstate the advantage.
11:15 < xyproto> vegai: yes, and I'm not trying to win him over, or convince
him that Go is better in every way, just that it might have its merits
11:15 * vegai shrugs
11:15 < xyproto> vegai: or at least that it's not silly
11:15 < vegai> people who like C++ are in such a different world from
myself, I'm not sure I can understand them well enough to provide good arguments
11:16 < vegai> it's like arguing with people who hate blacks
11:16 < xyproto> no, there are specific advantages that Go has.  Like the
channels and goroutines.  Quick compilation times.  The way multiple inheritance
does not exist.
11:17 < xyproto> Stuff like that.
11:17 < uriel> 11:12 < xyproto> Having a solid argument for why
exactly Go is better for large projects would be great
11:17 < uriel> xyproto: easy: write a large project in Go
11:17 < xyproto> uriel: that would be a great way to discover the advantages
myself, but not for learning them from someone else
11:17 < uriel> also, C++ damages the brain, no amount of rational or
emotional arguments will work, nor any amount of evidence
11:18 < xyproto> he's a clever guy, though.  The Norwegian champion in the
game of Go, and has been programming some Haskell.
11:18 < xyproto> He's not brain damaged in any way I can tell, even from a
lot of C++ coding.
11:19 < xyproto> He might be, though.  You never know,.
11:20 < vegai> so his ability to think is above that of most people
11:20 < vegai> and his ability to process multiple complex things
11:20 < uriel> being smart != being wise
11:21 < uriel> if you are smart, you can convince yourself of the most
idiotic things imaginable
11:21 < xyproto> uriel: I agree.  It's also != from being knowledgeable.
11:21 < uriel> like that c++ is a good language
11:22 < xyproto> I see.
11:22 < xyproto> Oh well, I assume that no more fruit will be born from this
question.  Thanks.
11:22 < xyproto> And yes, fruit can be born.  :)
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11:43 < wrtp> i think the package system is a good reason why go is good for
larger scale programming
11:45 * uriel finds that argument dubious
11:45 < uriel> oh, sorry, you mean for building large projects, that is true
11:45 < uriel> but I don't think it is the main reason
11:46 < uriel> I was thinking of goinstall (ie., 'package management', which
I'm quite sure is not what you meant)
11:47 < wrtp> i meant the way that initialisation works and the way that
packages cannot have cyclic dependencies
11:47 < wrtp> although i think that goinstall is cool too
11:48 < uriel> yea, you are right, and that does help with big projects, but
I don't think it is the main advantage of Go over c++ in big projects
11:49 < uriel> simplicity and sanity is the biggest advantage
11:49 < uriel> lack of a billion obscure 'features' that nobody fully
understands and that make it very hard to know what code does (obvious examples
are operator overloading and templates, but there are more)
11:50 < uriel> gofmt might seem trivial but also helps greatly in big
projects to keep all code uniform
11:51 < uriel> and goinstall is cool, just not very relevant for big
projects IMHO
11:51 < wrtp> those features are important in small projects too
11:52 < uriel> obviously
11:52 < Namegduf> I wish JavaScript didn't have cyclic dependencies.
11:53 < Namegduf> I want to kill the person who originally wrote some code I
have to look after due to passing in a "parent object" and operating on its
methods, meaning neither can be used separately.
11:53 < Namegduf> Go is nice for gently pushing you away from horrible
designs
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12:00 < uriel> and forcing you to keep your code clean and tiddy
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13:06 < lnostdal> hi guys!  what sort of GC does Go have?  is it precise?
generational?
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13:09 < aiju> lnostdal: mark and sweep
13:10 < aiju> supposedly to be replaced with something better eventually
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13:27 < wrtp> lnostdal: it's conservative, not precise, at present i think
13:27 < lnostdal> ok, wrtp; thanks :)
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16:52 < skelterjohn> morning
16:52 < aiju> evening
16:52 < soapy_illusions> Hi, getting back into Go, and trying to remember
how to do the following: gzip.NewWriter requires any io.Writer, if I simply want
the compressed string of bytes to printed (like fmt.Printf) how might I do that
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16:53 < skelterjohn> soapy_illusions: pass it os.Stdin
16:53 < skelterjohn> err
16:53 < skelterjohn> os.Stdout
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16:56 < soapy_illusions> ahh that's exactly what I needed, thanks a lot...
p.s.  anyone know the best compression algorithm to choose when compressing
strings that are about 400 chars long
16:56 < soapy_illusions> not huge files...
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16:58 < skelterjohn> huffman coding
http://en.wikipedia.org/wiki/Huffman_coding
16:58 < skelterjohn> provably optimal
16:58 < jbooth1> provably?
16:59 < jbooth1> or probably
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16:59 < skelterjohn> provably probably optimal :)
16:59 < jbooth1> didn't know that
16:59 < jbooth1> why isn't it used more, too cpu intensive?
17:00 < jbooth1> or are gzip and lzo actually using huffman coding
17:00 < skelterjohn> it is optimal for a very specific thing, it's important
to note
17:00 < skelterjohn> i believe all modern lossless compression algorithms
are based in part on huffman coding
17:00 < jbooth1> ok, like readable text where you have a small number of
different bytes?
17:00 < skelterjohn> the first paragraph of the wiki describes the
constraints on its optimality
17:01 < skelterjohn> it won't, for instance, abbreviate 800 zeros in a row
17:01 < jbooth1> ah, optimal if you can do a double pass to get exact
probabilities
17:01 < jbooth1> yeah
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17:02 < jbooth1> but it might pack them into a bunch of 0-bits so it'll be
100 bytes
17:02 * jbooth1 only done whiteboard huffman coding
17:02 < skelterjohn> it is a mapping of single characters to numbers, where
the numbers chosen for each character are done so that the fewest possible number
of bits are used
17:03 < soapy_illusions> cool, thanks a lot guys
17:03 < jbooth1> yeah and then you have to do something roughly varint-ish
to distinguish the different tokens from each other
17:03 < skelterjohn> i'm not sure how practically useful my suggestion is :)
17:03 < skelterjohn> jbooth1: i believe that's built into the encoding
17:03 < jbooth1> yeah
17:03 < aiju> why would you compress 400 bytes
17:03 < aiju> are you using core memory or something?
17:03 < skelterjohn> that's another good question
17:04 < skelterjohn> or maybe he has 9000 400 byte files
17:04 < skelterjohn> and he wants to fit it onto a floppy disk
17:04 < skelterjohn> my suggestion would be tgz
17:04 < aiju> yeah
17:04 < aiju> or txz if you have OCD
17:04 < skelterjohn> what's txs
17:04 < skelterjohn> txz
17:04 < aiju> .tar.xz
17:05 < skelterjohn> the embedded question was "what is xz"
17:05 < aiju> yet another compression algorithm
17:05 < skelterjohn> oh wow - that's actually googlable
17:05 < skelterjohn> i assumed that nothing would turn up
17:05 < aiju> i don't know anything else about it
17:05 < soapy_illusions> haha, I have hundreds of thousands of lines that
are about 400 bytes long but are independant and need to be stored in memory (not
disk) want to optimize as much as possible
17:06 < skelterjohn> soapy_illusions: what generated the lines?
17:06 < jbooth1> soapy i'd say LZO, slightly less compression but much less
CPU than gzip
17:06 < skelterjohn> if they are, for instance, english words
17:06 < soapy_illusions> they are
17:06 < skelterjohn> you can do clever stuff
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17:06 < soapy_illusions> well mostly...
17:06 < soapy_illusions> something like tries?
17:06 < skelterjohn> make a table of words
17:06 < jbooth1> yeah if you have a vocabulary of only 20k words
17:06 < skelterjohn> assign each a number
17:07 < jbooth1> build a table, that's a short, 2 bytes
17:07 < skelterjohn> store your strings as number arrays
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17:07 < soapy_illusions> ya I have many english words, but too many
usernames and numeric values to make it worth it (too bad)
17:07 < aiju> doesn't english have more than 65536 words?  :D
17:07 < jbooth1> does it?
17:07 < jbooth1> i'm actually not sure
17:07 < skelterjohn> yes
17:07 < skelterjohn> 140k i think
17:08 < soapy_illusions> aiju, I would bet only 20k are used in 90% of texts
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17:08 < aiju> true
17:08 < skelterjohn> soapy_illusions: they don't have to be real words
17:08 < skelterjohn> they just have to have an average length that is long
enough
17:08 < soapy_illusions> skelterjohn, ohh good point
17:08 < skelterjohn> and they need to not all be unique
17:08 < skelterjohn> otherwise your table is as big as your original data
set
17:09 < aiju> and for these words you can use huffman coding!
17:09 < skelterjohn> and you could also use huffman encoding, and treat the
words as individual symbols :)
17:09 < skelterjohn> nooooo
17:09 < skelterjohn> too slow
17:09 < soapy_illusions> now where getting to the OCD level :P
17:10 < skelterjohn> a lookup table would be a good start
17:10 < aiju> just require the user to install more RAM
17:10 < aiju> works these days
17:10 < skelterjohn> also true
17:11 < soapy_illusions> i know I am so afraid of working with an in-memory
database, but so many ppl have sooo much ram
17:11 < skelterjohn> here's your in-memory database - "var db
map[int]string"
17:13 < soapy_illusions> haha
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17:22 < Namegduf> An optimised trie would be a decent idea.
17:23 < Namegduf> No offense to anyone intended, though, but the trie
library out there is useless.
17:23 < Namegduf> It's horribly space inefficient.
17:23 < Namegduf> A map in each node, no compression of sequences of a
single child.
17:24 < Namegduf> That's well over a hundred bytes to store each
character...
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17:34 < xyproto> how is xor for bools written?
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17:37 < fzzbt> like this ^ ?
17:37 < jbooth1> lol
17:39 < xyproto> fzzbt: no, that does not work
17:40 < skelterjohn> xyproto: a != b
17:40 < skelterjohn> will do a xor b
17:41 < xyproto> skelterjohn: ah, good point.  Thanks
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17:48 < delinka> in response to an article on HN (Systems Programming with
Racket), I saw this comment: 'The Go language is also claiming to be a "Systems
Programming Language" but I won't use it for what I call "Systems Programming"...'
17:48 < delinka> so what would be the downside to writing a kernel in Go?
17:48 < xyproto> delinka: I've already argued for porting the Linux kernel
to Go. Someone just have to make a github project.  ;)
17:49 < skelterjohn> hmm.  i don't know much about kernel programming, but i
do know that go gives no control over scheduling goroutines
17:49 < skelterjohn> and in kernels i feel like you want to have control
over anything
17:49 < xyproto> skelterjohn: you could write tiny C or assembly snippets
for those parts, though?
17:50 < delinka> that's just part of the runtime, right?  since Go's current
implementation is open source, it's tweakble.
17:50 < skelterjohn> like i said, i don't know much about this stuff
17:50 < skelterjohn> a better "next step" would be drawing tools
17:51 < xyproto> I've written a simple os with C and assembly.  If there are
parts that must be in assembly, they can be linked in.
17:51 < delinka> I mean, there might be some obvious places you *need* asm,
but ...  I don't get why Go would be a bad idea for a new OS.
17:51 < xyproto> delinka: I don't think it is (a bad idea)
17:51 < Namegduf> There are parts where garbage collection can't work.
17:51 < Namegduf> Nor Go's fondess for implicit allocations.
17:51 < Namegduf> But those are minimal enough.
17:52 < Namegduf> I think someone was trying, but they stopped due to having
to rely on internals for the special parts, with the Go language change rate.
17:54 < skelterjohn> a way to specify a different allocator would be
necessary, to be sure
17:55 < delinka> I'd probably be tempted to implement a shell before a
kernel-- backgrounding, pipes, etc --surely you'd get a taste for some of the
problems that need solving in the kernel space
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18:01 < xyproto> delinka: that depends on how revolutionary your kernel
design would be
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18:52 < Bigbear1> can you make a website with Go programming language?
18:57 < skelterjohn> of course
18:57 < skelterjohn> that is one of the main targets
18:59 < skelterjohn> i remember you asked that in here once before, a day or
two ago
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18:59 < skelterjohn> and got the same response, albeit from a different
person
18:59 < aiju> apparently i didn't use enough vitriol when i answered that
question
18:59 < skelterjohn> or you used too much
19:00 < aiju> no such thing
19:00 < skelterjohn> maybe you should have answered in caps
19:00 < skelterjohn> too bad we can't specify what font our messages are in,
on irc
19:00 < aiju> i'd use fraktur all the time
19:01 < skelterjohn> that would make it even easier to ignore you
19:01 < aiju> haha
19:01 < aiju> there is /ignore already
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19:16 < TMKCodes> Only problem i'm having with Go website creation I seem
not to understand how to handle cookies
19:17 < soapy_illusions> ...  Would be interested to hear answers about
cookie handling, and for anyone starting out with web programming and Go checkout
web.go on github
19:17 < aiju> cookies are spawn from hell ;P
19:17 < TMKCodes> web.go does not compile for me
19:19 < soapy_illusions> change branch to the release version unless you are
using go weekly
19:20 < soapy_illusions> (and by change branch I mean checkout the release
branch of web.go)
19:21 < TMKCodes> soapy_illusions, will try
19:23 < soapy_illusions> aiju, agreed that they are a spawn from hell, but
is there any better way to do session management
19:24 < TMKCodes> request.go on master web.go does not compile in the latest
go
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19:31 < tux21b> assuming i want to be able to read from (immutable parts) of
a file concurrently.  What is the best way to deal with that?  Can file.ReadAt be
called concurrently?  or should I create a pool of files objects for that?
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20:18 < huin> tux21b: ReadAt doesn't look like it can be safely used from
multiple goroutines for the same instance of *File
20:19 < aiju> the pread/pwrite syscall should work concurrently
20:19 < aiju> there should be some way to invoke them ...
20:19 < huin> it's the position in the file that creates trouble
20:19 < huin> it potentially makes more than one syscall
20:19 < aiju> pread/pwrite have a position argument
20:19 < aiju> and are syscalls
20:20 < huin> ah, that might be okay then
20:20 < aiju> they are meant specifically for that kind of thing
20:20 < aiju> i'm not sure *BSD has them, though
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20:21 < mtrichardson> soapy_illusions: going back to the cookie discussion -
as best I can tell if you're using raw http you have to set the header strings
manually.  w.Headers().Add("Set-Header", "cookie string")
20:21 < huin> aiju: apparently they are in POSIX
20:21 < aiju> is *BSD 100% POSIX compatible?
20:22 < soapy_illusions> mtrichardson, coming from a php background, I for
sure miss my $_SESSION variable
20:22 < huin> *shrug* but then,
http://golang.org/src/pkg/os/file.go?s=3432:3496#L89 doesn't specifically handle
things differently for different OSs that i can see
20:22 < taruti> aiju: bsd has pwrite+pread
20:23 < huin> awesome.  didn't know about those syscalls
20:23 < aiju> ReadAt should work
20:23 < mtrichardson> soapy_illusions: well, there's a cookie struct already
but it's designed mainly for internal use around reading/setting already-set
cookies on the request/response (I think) - seems you could add a method that
attaches a properly created string to a ResponseWriter.  I know they're working
pretty heavily on that package right now, dunno if there's any thought into doing
something like that.
20:24 < huin> tux21b: conclusion - ReadAt is concurrently safe with itself
20:24 < TMKCodes> mtrichardson that would be awesome.  I have been looking
actually if that would be possible.
20:25 < soapy_illusions> mtrichardson, haven't looked into it, but does
web.go have that kind of functionality baked in (could be a very useful addition)
20:26 < mtrichardson> soapy_illusions: I haven't used web.go, but
https://github.com/hoisie/web.go/blob/master/cookie.go#L81 is how they write
cookies out using http's Cookie structs.
20:27 < TMKCodes> soapy_illusions, just to let you know "Set-Cookie:
name2=value2; Expires=Wed, 09 Jun 2021 10:18:14 GMT" is the cookie header string
20:27 < soapy_illusions> thanks a lot, will definitely look into this
20:28 < TMKCodes> You could probably write a function which takes a Cookie
structure and the responseWriter then writes this Cookie structure as string to
the responsewriter
20:30 < TMKCodes> Though i want to know how to handle req.Cookie[0] index
not being out of range
20:31 < TMKCodes> something like empty in php
20:32 < mtrichardson> TMKCodes: couldn't you len it?
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20:33 < TMKCodes> mtrichardson, i realized that
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20:37 < soapy_illusions> on an unrelated note, what is the best way to turn
a unicode rune into a readable string (unicode package didn't seem to have a
function for that)
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20:42 < aiju> string()
20:42 < aiju> string(0x5350)
20:43 < TMKCodes> though mtrichardson there's no Headers field or method in
http.ResponseWriter
20:44 < soapy_illusions> aiju, haha I wasn't even gonna try that, figuring
it had to be much more complicated
20:45 < mtrichardson> TMKCodes: it's Header() - and that's a recent change.
Here's the API: http://golang.org/pkg/http/#Header
20:46 < tux21b> huin, I've read the manpage of pread too, but I wasn't sure.
Many thanks :)
20:47 < huin> tux21b: thank aiju who pointed the discussion in the right
direction
20:48 < TMKCodes> mtrichardson yes but ResponseWriter does not have headers
field or method
20:48 < TMKCodes> there's just w.SetHeader();
20:48 < tux21b> ok, thank you too, aiju *g*
20:49 < mtrichardson> TMKCodes: again, this was a recent change, as of
February 24 - http://golang.org/doc/devel/release.html#2011-02-24
20:52 < TMKCodes> mtrichardson, yes, but as i said Headers() is not field or
method in responsewriter
20:52 < mtrichardson> TMKCodes: Header, not Headers.
20:53 < TMKCodes> w.Header undefined (type http.ResponseWriter has no field
or method Header)
20:53 < mtrichardson> Then you don't have the latest go code :)
20:53 < TMKCodes> I do have
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20:58 < TMKCodes> The actual call is w.SetHeader(); before w.Write call or
w.WriteHeader after
20:59 < mtrichardson> TMKCodes: that's the old API.  It was updated to allow
for better access to headers, especially around setting multiple similar things -
eg, multiple set-cookies.
21:00 < TMKCodes> mtrichardson, http://golang.org/pkg/http/#ResponseWriter
21:01 < mtrichardson> TMKCodes: If you're not tracking the weekly releases,
you won't see the new API.
21:02 < TMKCodes> mtrichardson, as i said i have the newest and even the
documentation is wrong if your call would be possible.
21:02 -!- keidaa [~keidaa@cm-84.210.56.138.getinternet.no] has joined #go-nuts
21:03 < keidaa> so..  when using the template package and passing a struct
the fields needs to be exportable...
21:03 < keidaa> why so?
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21:04 < kamaji> keidaa: I think it's done at runtime, so template can't see
the fields unless they're public
21:04 <+iant> keidaa: because the template package can't see the fields if
they are not exported
21:05 < kamaji> yesssssss
21:05 < kamaji> :p
21:05 < keidaa> but the struct itself does not need to be exportable since
its passed to the template
21:05 < keidaa> so isn't the fields passed with it..?
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21:07 < keidaa> i guess not:)
21:07 < kamaji> Yeah i'm stumped :p
21:08 < kamaji> which bit of template specifically?
21:08 < keidaa> execute
21:09 < keidaa> to me it seems that if you pass a private struct to some
outside function it should gain access to all its fields
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21:10 < keidaa> guess its enables you to pass around stuff but still protect
parts of it
21:11 < mtrichardson> TMKCodes:
http://code.google.com/p/go/source/detail?r=9da4e71e8f
21:11 < kamaji> I'm trying to find out if reflect gives unexported fields
21:13 < keidaa> kamaji: yes thats interesting if it does
21:13 < kamaji> I guess either way, someone is stopping you doing that on
purpose
21:13 < kamaji> hehe
21:13 < kamaji> I would imagine it's template, since it seems like it could
be useful to have some hidden fields
21:13 < TMKCodes> mtrichardson actually i might take it back.  I might not
have the newest :(
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21:15 < keidaa> kamaji: wonder if its case sensitive then when parsing the
template
21:15 * keidaa testing...
21:16 < keidaa> yes it is:P
21:17 < keidaa> effectively meaning all vars in a template must be
capitalized
21:17 < keidaa> not that I should care
21:17 < kamaji> it's the principle of the thing!
21:18 < kamaji> :D
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21:18 < keidaa> yes, it makes sense..
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21:45 < TMKCodes> mtrichardson, thank you for helping :)
21:45 < mtrichardson> TMKCodes: no problem!
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22:02 < Bigbear1> skelterjohn: how do you make a website with Go?
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22:16 < TMKCodes> Hmm..  Now to wonder how to handle file uploads over http.
:/
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22:23 < skelterjohn> Bigbear1: basically, you use the http package.  there
are some examples on the go website
22:23 < mtrichardson> TMKCodes: there's some discussion on the mailing list
-
https://groups.google.com/group/golang-nuts/browse_thread/thread/276958547364ff1d
for instance
22:24 < niemeyer> TMKCodes: You may be interested in this thread:
http://groups.google.com/group/golang-dev/t/d28255b2f98620e3
22:24 < niemeyer> mtrichardson: Wow :)
22:24 < mtrichardson> niemeyer: I like your link better
22:24 < Bigbear1> skelterjohn: link?
22:24 < skelterjohn> golang.org
22:26 < Bigbear1> well I have lokked
22:26 < Bigbear1> looked*
22:28 < skelterjohn> and what did you find?
22:29 < Bigbear1> nothing
22:29 < skelterjohn> did you look at the documentation?
22:29 < skelterjohn> or tutorial links?
22:29 < skelterjohn> i am not google
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22:30 < Bigbear1> I tried website site: http://golang.org in google
22:30 < Bigbear1> I tried looking through the site
22:30 < Bigbear1> only thing I found was that the golang website was a go
program
22:30 < skelterjohn> this is two clicks from the main page:
http://golang.org/doc/codelab/wiki/
22:31 < skelterjohn> i clicked on documentation, and i clicked on a tutorial
about web apps
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22:35 < Bigbear1> can go be used as a cms?
22:36 < Namegduf> No.
22:36 < mtrichardson> Bigbear1: you would have to write a CMS in Go.
22:36 < Namegduf> Go is a programming language, and a CMS is a type of
program.
22:37 < skelterjohn> what is a cms?
22:37 < skelterjohn> content management system?
22:37 < Namegduf> Yes.
22:38 < firwen> Some has already see for a possible integration of go in
passenger ?
22:38 < Namegduf> A system for using 20MB of RAM and significant runtime per
request to deliver mostly static content.
22:38 < firwen> this could be a cool idea, Phusion Passenger is more
convenient than classique fcgi
22:39 < skelterjohn> what is passenger?
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22:39 < firwen> http://fr.wikipedia.org/wiki/Phusion_Passenger
22:39 < Namegduf> Already see some integrated go passenger possible some.
22:39 < firwen> french version sorry ><
22:40 < firwen> a scalable mod_rails for ruby and python language with
apache and nginx
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22:57 < KirkMcDonald> I still say that an equivalent to WSGI would be a fine
thing for Go.
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23:09 < Bigbear1> I installed Go and all seems to go well all tests were
passed but when I run 6g hello.go it says
23:09 < Bigbear1> 6g: command not found
23:09 < Bigbear1> any ideas?
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23:10 < skelterjohn> yes - read documentation
23:10 < skelterjohn> however i feel that lesson won't stick
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23:14 < skelterjohn> Bigbear1: yes - read the installation guide
23:15 < skelterjohn> it explains that issue and what you need to do
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23:18 < Namegduf> KirkMcDonald: There are FastCGI packages which work well.
23:19 < KirkMcDonald> Namegduf: FastCGI does an entirely different thing.
23:19 < Bigbear1> skelterjohn: I followed this
http://golang.org/doc/install.html
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23:19 < KirkMcDonald> FastCGI is a wire protocol.  WSGI defines a Python
API.
23:19 < skelterjohn> http://golang.org/doc/install.html#environment
23:20 < Namegduf> Ah.
23:20 < Namegduf> So a package which provide an API to that protocol does do
the equivalent function.
23:21 < Bigbear1> skelterjohn: I don't get it
23:21 < KirkMcDonald> Namegduf: I suppose.
23:21 < skelterjohn> you need to update your path to include the go bin
directory
23:22 < Bigbear1> how
23:22 < Bigbear1> I installed it in Documents/go
23:22 < Bigbear1> is that ok?
23:22 < Bigbear1> or do I need to go to home/go
23:22 < skelterjohn> Bigbear1: I don't mind helping out a little, but I'm
not going to explain how unix-like systems work in detail
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23:22 < skelterjohn> google path environmental variables
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23:24 < KirkMcDonald> Environment variables.
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--- Log closed Wed May 04 00:00:50 2011