我是 ruby 的新手,有 python 背景 我想向 URL 发出头请求并检查一些信息,例如文件是否存在于服务器上以及时间戳、etag 等,我无法在 RUBY 中完成此操作。
在 Python 中:
import httplib2
print httplib2.Http().request('url.com/file.xml','HEAD')
在 Ruby 中:我试过这个并抛出一些错误
require 'net/http'
Net::HTTP.start('url.com'){|http|
response = http.head('/file.xml')
}
puts response
SocketError: getaddrinfo: nodename nor servname provided, or not known
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in `initialize'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in `open'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:877:in `block in connect'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/timeout.rb:51:in `timeout'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:876:in `connect'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:861:in `do_start'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:850:in `start'
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/net/http.rb:582:in `start'
from (irb):2
from /Users/comcast/.rvm/rubies/ruby-2.0.0-p0/bin/irb:16:in `<main>'
最佳答案
我知道这个问题已经得到解答,但我也不得不经历一些困难。下面是一些更具体的开始:
#!/usr/bin/env ruby
require 'net/http'
require 'net/https' # for openssl
uri = URI('http://stackoverflow.com')
path = '/questions/16325918/making-head-request-in-ruby'
response=nil
http = Net::HTTP.new(uri.host, uri.port)
# http.use_ssl = true # if using SSL
# http.verify_mode = OpenSSL::SSL::VERIFY_NONE # for example, when using self-signed certs
response = http.head(path)
response.each { |key, value| puts key.ljust(40) + " : " + value }
关于ruby - 在 Ruby 中发出 HEAD 请求,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16325918/