# 可能出现的错误
Net::OpenTimeout: execution expired
Errno::ECONNREFUSED: Connection refused

# 常见错误
OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed

# 可能的错误
Net::HTTPBadResponse: wrong status line
Encoding::UndefinedConversionError

require 'net/http'
require 'uri'

begin
  url = URI.parse('http://example.com')
  response = Net::HTTP.get_response(url)
  
  case response
  when Net::HTTPSuccess
    puts response.body
  else
    puts "Error: #{response.code} #{response.message}"
  end
rescue => e
  puts "Error occurred: #{e.message}"
end

require 'net/http'
require 'uri'

url = URI.parse('https://example.com')
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

# 禁用证书验证（不推荐生产环境使用）
http.verify_mode = OpenSSL::SSL::VERIFY_NONE

response = http.get(url.request_uri)

http = Net::HTTP.new(url.host, url.port)
http.open_timeout = 5 # 连接超时5秒
http.read_timeout = 10 # 读取超时10秒

def safe_http_get(url_str, max_retries = 3)
  retries = 0
  url = URI.parse(url_str)
  
  begin
    response = Net::HTTP.start(url.host, url.port, 
                              use_ssl: url.scheme == 'https',
                              open_timeout: 5,
                              read_timeout: 10) do |http|
      http.get(url.request_uri)
    end
    
    response.is_a?(Net::HTTPSuccess) ? response : nil
    
  rescue StandardError => e
    retries += 1
    retry if retries < max_retries
    nil
  end
end