From arminotto at googlemail.com  Thu Aug  9 11:24:18 2007
From: arminotto at googlemail.com (Armin Otto)
Date: Thu, 9 Aug 2007 17:24:18 +0200
Subject: [Rbrainz-users] using MusicBrainz::Model::Artist
Message-ID: <a755ad020708090824i3affa0aal5069157193fcc896@mail.gmail.com>

Hi,

been playing around with the rbrainz library in rails again.

For starters i wanted to get some artist information.

so, my controller gets:

@query  = MusicBrainz::Webservice::Query.new
@filter = MusicBrainz::Webservice::ArtistFilter.new(:name => "Michael
Jackson")
@results = @query.get_artists(@filter)


in the matching view i wanted to print out the content of each result.
Sinc the MusicBrainz::Model::Artist class isn't really documented I looked
the attributes up with .inspect and tried to display them in the view:

<table>
<% @results.each do |x| %>
<tr>
<td><%=h x.score %></td>
<td><%=h x.entity.aliases.count %></td>
<td><%=h x.entity.aliases.entries %></td>
<td><%=h x.entity.aliases.offset %></td>
<td><%=h x.entity.begin_date %></td>
<td><%=h x.entity.disambiguation %></td>
<td><%=h x.entity.end_date %></td>
<td><%=h x.entity.id.entity %></td>
<td><%=h x.entity.id.uuid %></td>
<td><%=h x.entity.name %></td>
<td><%=h x.entity.releases.count %></td>
<td><%=h x.entity.releases.entries %></td>
<td><%=h x.entity.releases.offset %></td>
<td><%=h x.entity.sort_name %></td>
<td><%=h x.entity.tags.count %></td>
<td><%=h x.entity.tags.entries %></td>
<td><%=h x.entity.tags.offset %></td>
<td><%=h x.entity.type %></td>
</tr>
<%end%>
</table>


Those work find, however, when I try to access the @relations attribute, i
can't.
Is that intentional and what is that thing for ?

Cheers,
Arotto
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From nigel at maven-group.org  Thu Aug  9 11:33:55 2007
From: nigel at maven-group.org (Nigel Graham)
Date: Thu, 09 Aug 2007 17:33:55 +0200
Subject: [Rbrainz-users] using MusicBrainz::Model::Artist
In-Reply-To: <a755ad020708090824i3affa0aal5069157193fcc896@mail.gmail.com>
References: <a755ad020708090824i3affa0aal5069157193fcc896@mail.gmail.com>
Message-ID: <46BB33E3.1080104@maven-group.org>

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From phw at rubyforge.org  Sat Aug 11 10:33:09 2007
From: phw at rubyforge.org (Philipp Wolfer)
Date: Sat, 11 Aug 2007 16:33:09 +0200
Subject: [Rbrainz-users] RBrainz 0.3 released
Message-ID: <c45b7a6e0708110733w287b5d3fo115173e80fa31bf4@mail.gmail.com>

RBrainz 0.3.0 has been released. This release fixes a bug with
relation end dates and makes it easier to work with values such as
release types or relation attributes with or without namespace. See
the changelog at http://rbrainz.rubyforge.org/api/files/CHANGES.html
for details.

For more information about RBrainz see the following resources:

Homepage:
http://rbrainz.rubyforge.org
API documentation:
http://rbrainz.rubyforge.org/api/
Download:
http://rubyforge.org/frs/?group_id=3677

-- 
Philipp Wolfer

From arminotto at googlemail.com  Fri Aug 17 07:57:16 2007
From: arminotto at googlemail.com (Armin Otto)
Date: Fri, 17 Aug 2007 13:57:16 +0200
Subject: [Rbrainz-users] REXML::ParseException: Declarations can only occur
	in the doctype declaration. (MusicBrainz::Webservice::ResponseError)
Message-ID: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>

I filled my database some time ago with lots of song titles and artist
names. some special characters turned up like the evil german Umlaute. :)

I'll tidy that up, of course, however, a program i wrote to scan musicbrainz
using  the names in the database gave me an unexpected error.

To demonstrate, i included two queries. The first one works, the second
doesn't.
And I have no idea why it doesn't and the other one does, since they don't
look that different to me.
(both are expected to deliver no usable results, but thats okay ;) )


here's the executable source :

-------------------- snip -------------------

require 'rbrainz'

def self.get_brainz_tracks(filter,
                        includes = {
                          :artist       => true,
                          :releases     => true,
                          :puids        => true,
                          :artist_rels  => true,
                          :release_rels => true,
                          :track_rels   => true,
                          :label_rels   => true,
                          :url_rels     => true,
                          :tags         => true })
    track_includes = MusicBrainz::Webservice::TrackIncludes.new(includes)
    query  = MusicBrainz::Webservice::Query.new
    track_filter = MusicBrainz::Webservice::TrackFilter.new(filter)
    puts track_filter.inspect
    begin
      result = query.get_tracks(track_filter)
      puts "# result size: #{result.size}"
    rescue
      puts $!
      result = nil
    end
    result
  end

puts get_brainz_tracks({
  :title  => "Lil\302\264 Love",
  :artist => "Little love",
  :limit  => 5 })
puts get_brainz_tracks({
  :title  => "Christina St\374rmer",
  :artist => "Mama (Ana Ahabak)",
  :limit  => 5 })

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From phw at rubyforge.org  Fri Aug 17 08:45:52 2007
From: phw at rubyforge.org (Philipp Wolfer)
Date: Fri, 17 Aug 2007 14:45:52 +0200
Subject: [Rbrainz-users] REXML::ParseException: Declarations can only
	occur in the doctype declaration.
	(MusicBrainz::Webservice::ResponseError)
In-Reply-To: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
References: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
Message-ID: <c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>

Interesting. I tried to query the MusicBrainz service directly for
"Christina St?rmer" with the URL below. MusicBrainz returns a broken
XML document with some Apache error page included (which explains the
parser error).

http://musicbrainz.org/ws/1/track/?type=xml&title=Christina%20St%FCrmer

Trying the same search with "Christina St?rmer" works:

http://musicbrainz.org/ws/1/track/?type=xml&title=Christina%20St%E4rmer

Searching just for "?" doesn't work, however:

http://musicbrainz.org/ws/1/track/?type=xml&title=%E4

This does not seem to be an error in RBrainz but a problem with the
MusicBrainz server itself. I have opened a bug report for the
MusicBrainz web service: http://bugs.musicbrainz.org/ticket/3100

-- 
Philipp Wolfer

From phw at rubyforge.org  Fri Aug 17 10:41:16 2007
From: phw at rubyforge.org (Philipp Wolfer)
Date: Fri, 17 Aug 2007 16:41:16 +0200
Subject: [Rbrainz-users] REXML::ParseException: Declarations can only
	occur in the doctype declaration.
	(MusicBrainz::Webservice::ResponseError)
In-Reply-To: <c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>
References: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
	<c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>
Message-ID: <c45b7a6e0708170741q796322c2t871ef8a97de67d23@mail.gmail.com>

Hello Armin,

Ok, some more information:

All requests to the MB server must be UTF-8 encoded, the above example
uses latin1. This causes the trouble.

Try to save the test file with UTF-8 encoding and write "?" instead of
"\374" or use the iconv module to convert between the encodings like

Iconv.iconv("utf-8", "iso-8859-1", "Christina St\374rmer").to_s

By the way: RBrainz will always return UTF-8 strings. If you need to
do some string processing with the results you might want to use jcode
in your application. Just include it with the following two lines and
you can safely use string operations.

require 'jcode'
$KCODE='UTF8'



-- 
Philipp Wolfer

From arminotto at googlemail.com  Fri Aug 17 19:41:49 2007
From: arminotto at googlemail.com (Armin Otto)
Date: Sat, 18 Aug 2007 01:41:49 +0200
Subject: [Rbrainz-users] REXML::ParseException: Declarations can only
	occur in the doctype declaration.
	(MusicBrainz::Webservice::ResponseError)
In-Reply-To: <c45b7a6e0708170741q796322c2t871ef8a97de67d23@mail.gmail.com>
References: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
	<c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>
	<c45b7a6e0708170741q796322c2t871ef8a97de67d23@mail.gmail.com>
Message-ID: <a755ad020708171641y365ff27cw2aedf8746f2985bb@mail.gmail.com>

i guess i'll have to, thanks.

by the way: Even though I have a rescue block, in case the mentionen error
occurs, the program terminates.
no rescueing possible. how come ?

2007/8/17, Philipp Wolfer <phw at rubyforge.org>:
>
> Hello Armin,
>
> Ok, some more information:
>
> All requests to the MB server must be UTF-8 encoded, the above example
> uses latin1. This causes the trouble.
>
> Try to save the test file with UTF-8 encoding and write "?" instead of
> "\374" or use the iconv module to convert between the encodings like
>
> Iconv.iconv("utf-8", "iso-8859-1", "Christina St\374rmer").to_s
>
> By the way: RBrainz will always return UTF-8 strings. If you need to
> do some string processing with the results you might want to use jcode
> in your application. Just include it with the following two lines and
> you can safely use string operations.
>
> require 'jcode'
> $KCODE='UTF8'
>
>
>
> --
> Philipp Wolfer
> _______________________________________________
> Rbrainz-users mailing list
> Rbrainz-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rbrainz-users
>
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From phw at rubyforge.org  Sat Aug 18 04:38:05 2007
From: phw at rubyforge.org (Philipp Wolfer)
Date: Sat, 18 Aug 2007 10:38:05 +0200
Subject: [Rbrainz-users] Fwd: REXML::ParseException: Declarations can only
	occur in the doctype declaration.
	(MusicBrainz::Webservice::ResponseError)
In-Reply-To: <c45b7a6e0708180137t23688395h6e40710906438228@mail.gmail.com>
References: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
	<c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>
	<c45b7a6e0708170741q796322c2t871ef8a97de67d23@mail.gmail.com>
	<a755ad020708171641y365ff27cw2aedf8746f2985bb@mail.gmail.com>
	<c45b7a6e0708180137t23688395h6e40710906438228@mail.gmail.com>
Message-ID: <c45b7a6e0708180138h65d03c96hc61c021e16af1bd0@mail.gmail.com>

2007/8/18, Armin Otto <arminotto at googlemail.com>:
> by the way: Even though I have a rescue block, in case the mentionen error
> occurs, the program terminates.
> no rescueing possible. how come ?

I actually don't know, but I often noticed that in Ruby one has to
catch an exception (in this case
MusicBrainz::Webservice::ResponseError) explicitly in order for it to
work. You can as well just write "rescue Exception", but rescue
without any type won't work.

If somebody knows why exceptions behave that way, please let me know.

--
Philipp Wolfer


-- 
Philipp Wolfer

From p.eberli at gmx.ch  Tue Aug 21 13:35:55 2007
From: p.eberli at gmx.ch (Philippe)
Date: Tue, 21 Aug 2007 19:35:55 +0200
Subject: [Rbrainz-users] Tag MP3 with rbrainz
Message-ID: <267E613A-9E51-40C9-BA77-DBD58F3D0602@gmx.ch>

Hello Everybody

I've programmed a script to tag albums of MP3s with rbrainz. I  
couldn't find a complete, real world example, so I share this one.  
Feel free to do anything you want with it...

Philippe
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From phw at rubyforge.org  Mon Aug 27 16:38:13 2007
From: phw at rubyforge.org (Philipp Wolfer)
Date: Mon, 27 Aug 2007 22:38:13 +0200
Subject: [Rbrainz-users] REXML::ParseException: Declarations can only
	occur in the doctype declaration.
	(MusicBrainz::Webservice::ResponseError)
In-Reply-To: <a755ad020708271312l57754f3ave37897d105531674@mail.gmail.com>
References: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
	<c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>
	<c45b7a6e0708170741q796322c2t871ef8a97de67d23@mail.gmail.com>
	<a755ad020708271312l57754f3ave37897d105531674@mail.gmail.com>
Message-ID: <c45b7a6e0708271338i272b39c1he2a7898cb2ae8363@mail.gmail.com>

2007/8/27, Armin Otto <arminotto at googlemail.com>:
> are you sure that rbrainz SENDS utf-8 strings ?
> I tried a query with some evil un-english characters and do not get any
> results.

RBrainz itself does not take care of the character encoding, you have
to pass properly encoded strings.

In your example you have to be careful, if you save that file as a
UTF-8 encoded file you'll double encode the characters (meaning each
of the two bytes of the UTF-8 character '?' is treated as a Latin1
character and get's converted into it's UTF-8 representation. You then
end up with four bytes representing two UTF-8 characters.

So either you save the file as UTF-8 without the iconv call or you
save the file as ISO-8859-1 with the conversion in the code. Both
works for me.

There are several reasons why RBrainz has no special UTF-8 support:
1. Ruby has currently bad support for UTF-8 (will get better in Ruby
1.9), you only can set the encoding globally. But applications using
Rbrainz may use other encodings.
2. You can't automatically convert strings passed to RBrainz to UTF-8,
since RBrainz doesn't know anything about the encoding the application
uses.
3. RBrainz does not need $KCODE set to UTF-8, since it does not use
any critical string operations (e.g. String#size or substring#slice)

So the only way is for the application using RBrainz to take care of
the encoding. But if you want to display international artists you
will most likely end up using UTF-8 in your application anyway :-)

I will add some information about that topic to the RBrainz
documentaion since it is currently not clear.

-- 
Philipp Wolfer

From arminotto at googlemail.com  Tue Aug 28 08:50:27 2007
From: arminotto at googlemail.com (Armin Otto)
Date: Tue, 28 Aug 2007 14:50:27 +0200
Subject: [Rbrainz-users] REXML::ParseException: Declarations can only
	occur in the doctype declaration.
	(MusicBrainz::Webservice::ResponseError)
In-Reply-To: <c45b7a6e0708271338i272b39c1he2a7898cb2ae8363@mail.gmail.com>
References: <a755ad020708170457n4c6ce0aat54c3b22f5344879@mail.gmail.com>
	<c45b7a6e0708170545n59020067t4455a56bf9d4ccfb@mail.gmail.com>
	<c45b7a6e0708170741q796322c2t871ef8a97de67d23@mail.gmail.com>
	<a755ad020708271312l57754f3ave37897d105531674@mail.gmail.com>
	<c45b7a6e0708271338i272b39c1he2a7898cb2ae8363@mail.gmail.com>
Message-ID: <a755ad020708280550y41181ebfra99a30d54d22e878@mail.gmail.com>

Hi Phillip,

no matter what I try, i can't seem to get a result for queries for "Jos?
Gonz?lez".

I get the name-strings from a databyse and analysed the name bytewise and
it's the same as the Iconv-version:

J   o   s   ?   (c)       G   o   n   z   ?   ?   l   e   s
74  111 115 195 169 32  71  111 110 122 195 161 108 101 115

I just have to assume that the above is utf-8 encoded, since i get it this
ways:
Iconv.iconv("utf-8", "iso-8859-1", "Jos? Gonz?les").to_s

anyway, no results.

so I'd like to ask you if you can get results for Mr Gonz?les using rbrainz
with the source saved normally - not in utf-8.

thanks.
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