How to set a proxy in rubys net/http?

问题:

I'm trying to set a proxy and to use it in a simple get request like in the documentation. But I always receive an error! The adress and port are right with open-uri it worked.. it's http://proxy:8080 .

proxy_addr = 'proxy'
proxy_port = 8080

Net::HTTP.new('google.de', nil, proxy_addr, proxy_port).start { |http|
  # always proxy via your.proxy.addr:8080
  Net::HTTP.get('google.de', '')
}

What am I doing wrong? Thanks for all answers!

回答1:

Net::HTTP.new('google.de', nil, proxy_addr, proxy_port).start { |http|

This will create an http object for you to use in the block. Use that rather than generating new ones each time, here Net::HTTP.get('google.de', '')

proxy_addr = 'proxy'
proxy_port = 8080

Net::HTTP.new('google.de', nil, proxy_addr, proxy_port).start { |http|
  # always proxy via your.proxy.addr:8080
  http.get('google.de', '')
}

回答2:

There is another option:

Net::HTTP will automatically create a proxy from the http_proxy environment variable if it is present.

So you can use

ENV['http_proxy'] = 'http://172.16.3.160:4226' # your http://address:port here

and Net::HTTP will use it for all requests by default.

It can be helpful for net_http requests in third-party libraries (for example it works for gem gibbon for MailChimp).

Pass nil for the proxy address to disable default http_proxy.

回答3:

Here is the code that works if you are making a REST api call behind a proxy:

require "uri"
require 'net/http'

proxy_host = '<proxy addr>'
proxy_port = '<proxy_port'
proxy_user = '<username>'
proxy_pass = '<password>'

uri = URI.parse("https://saucelabs.com:80/rest/v1/users/<username>")
proxy = Net::HTTP::Proxy(proxy_host, proxy_port, proxy_user, proxy_pass)

req = Net::HTTP::Get.new(uri.path)
req.basic_auth(<sauce_username>,<sauce_password>)

result = proxy.start(uri.host,uri.port) do |http|
http.request(req)
end

puts result.body

回答4:

#!/usr/bin/env ruby
#

require 'rubygems' 
require 'net/http' 
require 'open-uri' 
require 'timeout' 


mimvp_url = "http://proxy.mimvp.com/exist.php"
mimvp_url2 = "https://proxy.mimvp.com/exist.php"
mimvp_url3 = "https://apps.bdimg.com/libs/jquery-i18n/1.1.1/jquery.i18n.min.js"

$proxy = '183.222.102.95:8080'

$proxy_addr = $proxy.split(':')[0].strip
$proxy_port = $proxy.split(':')[1].strip

puts $proxy_addr
puts $proxy_port


begin 
  Timeout.timeout(30) {

    # mimvp_url = http://proxy.mimvp.com/exist.php
    # uri.host = proxy.mimvp.com
    # uri.port = 80
    # uri.path = /exist.php
    uri = URI.parse(mimvp_url)
    result = Net::HTTP.new(uri.host, nil, $proxy_addr, $proxy_port).start { |http|
      http.get(uri.path)
    }
    puts result.body


    # mimvp_url = http://proxy.mimvp.com/exist.php
    # uri.host = proxy.mimvp.com
    # uri.port = 80
    # uri.path = /exist.php
    # req = #<Net::HTTP::Get:0x007fafa594ff78>
    uri = URI.parse(mimvp_url)
    req = Net::HTTP::Get.new(uri.path)
    result = Net::HTTP::Proxy($proxy_addr, $proxy_port).start(uri.host, uri.port) {|http| 
      http.request(req)
    } 
    puts result.body


    # proxy auth （NO TEST）
    $proxy_addr = '<proxy addr>'
    $proxy_port = '<proxy_port'
    $proxy_user = '<username>'                # 代理用户名
    $proxy_pass = '<password>'                # 代理密码

    $website_username = '<website_username>'  # 目标网站登录用户名
    $website_password = '<website_password>'  # 目标网站登录密码

    uri = URI.parse(mimvp_url)
    req = Net::HTTP::Get.new(uri.path)
    req.basic_auth($website_username, $website_password)

    result = Net::HTTP::Proxy($proxy_addr, $proxy_port, $proxy_user, $proxy_pass).start(uri.host, uri.port) {|http| 
      http.request(req)
    } 
    puts result.body

}
rescue => e  
    puts e.inspect  
    exit  
end