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
On Windows, make sure you're using the DevKit and the development version of libcurl. Unzip, then run this in your command line (alter paths to your curl location, but remember to use forward slashes):
gem install curb --platform=ruby -- --with-curl-lib=C:/curl-7.39.0-devel-mingw32/bin --with-curl-include=C:/curl-7.39.0-devel-mingw32/include
Or, if you downloaded the archive:
$ rake install
If you have a weird 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
On Ubuntu, the dependencies can be satisfied by installing the following packages:
$ sudo apt-get install libcurl3 libcurl3-gnutls libcurl4-openssl-dev
On RedHat:
$ sudo yum install ruby-devel libcurl-devel openssl-devel
Curb has fairly extensive RDoc comments in the source. You can build the documentation with:
$ rake doc
Curb provides two classes:
Curl::Easy- simple API, for day-to-day tasks.Curl::Multi- more advanced API, for operating on multiple URLs simultaneously.
To use either, you will need to require the curb gem:
require 'curb'http = Curl.get("http://www.google.com/")
puts http.body_str
http = Curl.post("http://www.google.com/", {:foo => "bar"})
puts http.body_str
http = Curl.get("http://www.google.com/") do|http|
http.headers['Cookie'] = 'foo=1;bar=2'
end
puts http.body_strc = Curl::Easy.perform("http://www.google.co.uk")
puts c.body_strSame thing, more manual:
c = Curl::Easy.new("http://www.google.co.uk")
c.perform
puts c.body_strCurl::Easy.perform("http://www.google.co.uk") do |curl|
curl.headers["User-Agent"] = "myapp-0.0"
curl.verbose = true
endSame thing, more manual:
c = Curl::Easy.new("http://www.google.co.uk") do |curl|
curl.headers["User-Agent"] = "myapp-0.0"
curl.verbose = true
end
c.performc = Curl::Easy.new("http://github.com/")
c.http_auth_types = :basic
c.username = 'foo'
c.password = 'bar'
c.performHTTP "insecure" SSL connections (like curl -k, --insecure) to avoid Curl::Err::SSLCACertificateError:
c = Curl::Easy.new("http://github.com/")
c.ssl_verify_peer = false
c.performc = Curl::Easy.new("http://www.google.co.uk")
c.on_body { |data| print(data) }
c.on_header { |data| print(data) }
c.performc = Curl::Easy.new
["http://www.google.co.uk", "http://www.ruby-lang.org/"].map do |url|
c.url = url
c.perform
c.body_str
endc = 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('thing[file]', 'myfile.rb'))c = Curl::Easy.new("https://http2.akamai.com")
c.set(:HTTP_VERSION, Curl::HTTP_2_0)
c.perform
puts (c.body_str.include? "You are using HTTP/2 right now!") ? "HTTP/2" : "HTTP/1.x"# make multiple GET requests
easy_options = {:follow_location => true}
# Use Curl::CURLPIPE_MULTIPLEX for HTTP/2 multiplexing
multi_options = {:pipeline => Curl::CURLPIPE_HTTP1}
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 => Curl::CURLPIPE_HTTP1}
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
endresponses = {}
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]
endon_successis called when the response code is 2xxon_redirectis called when the response code is 3xxon_missingis called when the response code is 4xxon_failureis called when the response code is 5xxon_completeis called in all cases.