Resolv

Parent:Object

Resolv是用Ruby编写的线程感知型DNS解析器库。Resolv可以同时处理多个DNS请求，而不会阻塞整个Ruby解释器。

另请参见resolv-replace.rb，以便用Resolv替换libc解析器。

Resolv可以直接使用DNS模块查找各种DNS资源。

例子：

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

错误

NIS不受支持。

/etc/nsswitch.conf不受支持。

常量

AddressRegex

请使用Regexp来匹配IP地址。

DefaultResolver

用于Resolv类方法的默认解析器。

公共类方法

each_address(name, &block) Show source

遍历所有IP地址的名称。

# File lib/resolv.rb, line 57
def self.each_address(name, &block)
  DefaultResolver.each_address(name, &block)
end

each_name(address, &proc) Show source

遍历所有主机名的地址。

# File lib/resolv.rb, line 78
def self.each_name(address, &proc)
  DefaultResolver.each_name(address, &proc)
end

getaddress(name) Show source

查找名称的第一个IP地址。

# File lib/resolv.rb, line 43
def self.getaddress(name)
  DefaultResolver.getaddress(name)
end

getaddresses(name) Show source

查找所有IP地址的名称。

# File lib/resolv.rb, line 50
def self.getaddresses(name)
  DefaultResolver.getaddresses(name)
end

getname(address) Show source

查找地址的主机名。

# File lib/resolv.rb, line 64
def self.getname(address)
  DefaultResolver.getname(address)
end

getnames(address) Show source

查找所有地址的主机名。

# File lib/resolv.rb, line 71
def self.getnames(address)
  DefaultResolver.getnames(address)
end

new(resolvers=Hosts.new, DNS.new) Show source

使用解析器创建新的Resolv。

# File lib/resolv.rb, line 85
def initialize(resolvers=[Hosts.new, DNS.new])
  @resolvers = resolvers
end

公共实例方法

each_address(name) { |name| ... } Show source