Resolv 類別

Resolv 是使用 Ruby 編寫的多執行緒 DNS 解析器程式庫。 Resolv 可以同時處理多個 DNS 要求,而不會阻擋整個 Ruby 詮譯器。

另請參閱 resolv-replace.rb,以使用 Resolv 取代 libc 解析器。

Resolv 可以直接使用 DNS 模組查詢各種 DNS 資源。

範例

p Resolv.getaddress "www.ruby-lang.org"
p Resolv.getname "210.251.121.214"

Resolv::DNS.open do |dns|
  ress = dns.getresources "www.ruby-lang.org", Resolv::DNS::Resource::IN::A
  p ress.map(&:address)
  ress = dns.getresources "ruby-lang.org", Resolv::DNS::Resource::IN::MX
  p ress.map { |r| [r.exchange.to_s, r.preference] }
end

錯誤

常數

AddressRegex

用於比對 IP 位址的 Regexp

DefaultResolver

用於 Resolv 類別方法的預設解析器。

VERSION

公開類別方法

each_address(name, &block) 按一下以切換來源

反覆處理 name 的所有 IP 位址。

# File lib/resolv.rb, line 59
def self.each_address(name, &block)
  DefaultResolver.each_address(name, &block)
end
each_name(address, &proc) 按一下以切換來源

反覆處理 address 的所有主機名稱。

# File lib/resolv.rb, line 80
def self.each_name(address, &proc)
  DefaultResolver.each_name(address, &proc)
end
getaddress(name) 按一下以切換來源

查詢 name 的第一個 IP 位址。

# File lib/resolv.rb, line 45
def self.getaddress(name)
  DefaultResolver.getaddress(name)
end
getaddresses(name) 按一下以切換來源

查詢 name 的所有 IP 位址。

# File lib/resolv.rb, line 52
def self.getaddresses(name)
  DefaultResolver.getaddresses(name)
end
getname(address) 按一下以切換來源

查詢 address 的主機名稱。

# File lib/resolv.rb, line 66
def self.getname(address)
  DefaultResolver.getname(address)
end
getnames(address) 按一下以切換來源

查詢所有 address 的主機名稱。

# File lib/resolv.rb, line 73
def self.getnames(address)
  DefaultResolver.getnames(address)
end
new(resolvers=nil, use_ipv6: nil) 按一下以切換來源

使用 resolvers 建立新的 Resolv

# File lib/resolv.rb, line 87
def initialize(resolvers=nil, use_ipv6: nil)
  @resolvers = resolvers || [Hosts.new, DNS.new(DNS::Config.default_config_hash.merge(use_ipv6: use_ipv6))]
end

公開實例方法

each_address(name) { |name| ... } 按一下以切換來源

反覆處理 name 的所有 IP 位址。

# File lib/resolv.rb, line 111
def each_address(name)
  if AddressRegex =~ name
    yield name
    return
  end
  yielded = false
  @resolvers.each {|r|
    r.each_address(name) {|address|
      yield address.to_s
      yielded = true
    }
    return if yielded
  }
end
each_name(address) { |name| ... } 按一下以切換來源

反覆處理 address 的所有主機名稱。

# File lib/resolv.rb, line 146
def each_name(address)
  yielded = false
  @resolvers.each {|r|
    r.each_name(address) {|name|
      yield name.to_s
      yielded = true
    }
    return if yielded
  }
end
getaddress(name) 按一下以切換來源

查詢 name 的第一個 IP 位址。

# File lib/resolv.rb, line 94
def getaddress(name)
  each_address(name) {|address| return address}
  raise ResolvError.new("no address for #{name}")
end
getaddresses(name) 按一下以切換來源

查詢 name 的所有 IP 位址。

# File lib/resolv.rb, line 102
def getaddresses(name)
  ret = []
  each_address(name) {|address| ret << address}
  return ret
end
getname(address) 按一下以切換來源

查詢 address 的主機名稱。

# File lib/resolv.rb, line 129
def getname(address)
  each_name(address) {|name| return name}
  raise ResolvError.new("no name for #{address}")
end
getnames(address) 按一下以切換來源

查詢所有 address 的主機名稱。

# File lib/resolv.rb, line 137
def getnames(address)
  ret = []
  each_name(address) {|name| ret << name}
  return ret
end