Curb (probably CUrl-RuBy or something) provides Ruby-language bindings for the libcurl(3), a fully-featured client-side URL transfer library. cURL and libcurl live at http://curl.haxx.se/ .
Curb is a work-in-progress, and currently only supports libcurl's 'easy' and 'multi' modes.
Curb is copyright (c)2006 Ross Bamford, and released under the terms of the Ruby license. See the LICENSE file for the gory details.
- A working Ruby installation (1.8+, tested with 1.8.6, 1.8.7, 1.9.1, and 1.9.2)
- A working (lib)curl installation, with development stuff (7.5+, tested with 7.19.x)
- A sane build environment (e.g. gcc, make)
... will usually be as simple as:
$ gem install curb
Or, if you downloaded the archive:
$ rake install
If you have a wierd setup, you might need extconf options. In this case, pass them like so:
$ rake install EXTCONF_OPTS='--with-curl-dir=/path/to/libcurl --prefix=/what/ever'
Curb is tested only on GNU/Linux x86 and Mac OSX - YMMV on other platforms. If you do use another platform and experience problems, or if you can expand on the above instructions, please report the issue at http://github.com/taf2/curb/issues
Curb has fairly extensive RDoc comments in the source. You can build the documentation with:
$ rake doc
c = Curl::Easy.perform("http://www.google.co.uk")
puts c.body_str
c = Curl::Easy.new("http://www.google.co.uk")
c.perform
puts c.body_str
Curl::Easy.perform("http://www.google.co.uk") do |curl|
curl.headers["User-Agent"] = "myapp-0.0"
curl.verbose = true
end
c = Curl::Easy.new("http://www.google.co.uk") do |curl|
curl.headers["User-Agent"] = "myapp-0.0"
curl.verbose = true
end
c.perform
c = Curl::Easy.new("http://www.google.co.uk")
c.on_body { |data| print(data) }
c.on_header { |data| print(data) }
c.perform
c = Curl::Easy.new
["http://www.google.co.uk", "http://www.ruby-lang.org/"].map do |url|
c.url = url
c.perform
c.body_str
end
c = Curl::Easy.http_post("http://my.rails.box/thing/create",
Curl::PostField.content('thing[name]', 'box'),
Curl::PostField.content('thing[type]', 'storage'))
c = Curl::Easy.new("http://my.rails.box/files/upload")
c.multipart_form_post = true
c.http_post(Curl::PostField.file('myfile.rb'))
# make multiple GET requests
easy_options = {:follow_location => true}
multi_options = {:pipeline => true}
Curl::Multi.get('url1','url2','url3','url4','url5', easy_options, multi_options) do|easy|
# do something interesting with the easy response
puts easy.last_effective_url
end
# make multiple POST requests
easy_options = {:follow_location => true, :multipart_form_post => true}
multi_options = {:pipeline => true}
url_fields = [
{ :url => 'url1', :post_fields => {'f1' => 'v1'} },
{ :url => 'url2', :post_fields => {'f1' => 'v1'} },
{ :url => 'url3', :post_fields => {'f1' => 'v1'} }
]
Curl::Multi.post(url_fields, easy_options, multi_options) do|easy|
# do something interesting with the easy response
puts easy.last_effective_url
end
responses = {}
requests = ["http://www.google.co.uk/", "http://www.ruby-lang.org/"]
m = Curl::Multi.new
# add a few easy handles
requests.each do |url|
responses[url] = ""
c = Curl::Easy.new(url) do|curl|
curl.follow_location = true
curl.on_body{|data| responses[url] << data; data.size }
curl.on_success {|easy| puts "success, add more easy handles" }
end
m.add(c)
end
m.perform do
puts "idling... can do some work here"
end
requests.each do|url|
puts responses[url]
end
on_success: is called when the response code is 20x on_failure: is called when the response code is not success, including redirects e.g. 30x on_complete: is called in all cases.
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