struct Socket::Addrinfo
Overview
Domain name resolver.
Defined in:
socket/addrinfo.crClass Method Summary
-
.resolve(domain : String, service, family : Family | Nil = nil, type : Type = nil, protocol : Protocol = Protocol::IP, timeout = nil) : Array(Addrinfo)
Resolves a domain that best matches the given options.
-
.resolve(domain : String, service, family : Family | Nil = nil, type : Type = nil, protocol : Protocol = Protocol::IP, timeout = nil, &)
Resolves a domain that best matches the given options.
- .tcp(domain : String, service, family = Family::UNSPEC, timeout = nil) : Array(Addrinfo)
-
.tcp(domain : String, service, family = Family::UNSPEC, timeout = nil, &)
Resolves a domain for the TCP protocol with STREAM type, and yields each possible
Addrinfo
. - .udp(domain : String, service, family = Family::UNSPEC, timeout = nil) : Array(Addrinfo)
-
.udp(domain : String, service, family = Family::UNSPEC, timeout = nil, &)
Resolves a domain for the UDP protocol with DGRAM type, and yields each possible
Addrinfo
.
Instance Method Summary
- #family : Family
-
#inspect(io : IO)
Appends this struct's name and instance variables names and values to the given IO.
-
#ip_address : Socket::IPAddress
Returns an
IPAddress
matching this addrinfo. - #protocol : Protocol
- #size : Int32
- #to_unsafe
- #type : Type
Instance methods inherited from struct Struct
==(other) : Bool
==,
hash(hasher)
hash,
inspect(io : IO) : Nil
inspect,
pretty_print(pp) : Nil
pretty_print,
to_s(io : IO) : Nil
to_s
Instance methods inherited from struct Value
==(other : JSON::Any)==(other : YAML::Any)
==(other) ==, dup dup
Instance methods inherited from class Object
! : Bool
!,
!=(other)
!=,
!~(other)
!~,
==(other)
==,
===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as
Class methods inherited from class Object
from_json(string_or_io, root : String)from_json(string_or_io) from_json, from_yaml(string_or_io : String | IO) from_yaml
Macros inherited from class Object
class_getter(*names, &block)
class_getter,
class_getter!(*names)
class_getter!,
class_getter?(*names, &block)
class_getter?,
class_property(*names, &block)
class_property,
class_property!(*names)
class_property!,
class_property?(*names, &block)
class_property?,
class_setter(*names)
class_setter,
def_clone
def_clone,
def_equals(*fields)
def_equals,
def_equals_and_hash(*fields)
def_equals_and_hash,
def_hash(*fields)
def_hash,
delegate(*methods, to object)
delegate,
forward_missing_to(delegate)
forward_missing_to,
getter(*names, &block)
getter,
getter!(*names)
getter!,
getter?(*names, &block)
getter?,
property(*names, &block)
property,
property!(*names)
property!,
property?(*names, &block)
property?,
setter(*names)
setter
Class Method Detail
Resolves a domain that best matches the given options.
- domain may be an IP address or a domain name.
- service may be a port number or a service name. It must be specified,
because different servers may handle the
mail
orhttp
services for example. - family is optional and defaults to
Family::UNSPEC
- type is the intended socket type (e.g.
Type::STREAM
) and must be specified. - protocol is the intended socket protocol (e.g.
Protocol::TCP
) and should be specified.
Example:
require "socket"
addrinfos = Socket::Addrinfo.resolve("example.org", "http", type: Socket::Type::STREAM, protocol: Socket::Protocol::TCP)
Resolves a domain that best matches the given options.
Yields each possible Addrinfo
resolution since a domain may resolve to
many IP. Implementations are supposed to try all the addresses until the
socket is connected (or bound) or there are no addresses to try anymore.
Raising is an expensive operation, so instead of raising on a connect or bind error, just to rescue it immediately after, the block is expected to return the error instead, which will be raised once there are no more addresses to try.
The iteration will be stopped once the block returns something that isn't
an Exception
(e.g. a Socket
or nil
).
Resolves domain for the TCP protocol and returns an Array
of possible
Addrinfo
. See #resolve
for details.
Example:
require "socket"
addrinfos = Socket::Addrinfo.tcp("example.org", 80)
Resolves a domain for the TCP protocol with STREAM type, and yields each
possible Addrinfo
. See #resolve
for details.
Resolves domain for the UDP protocol and returns an Array
of possible
Addrinfo
. See #resolve
for details.
Example:
require "socket"
addrinfos = Socket::Addrinfo.udp("example.org", 53)
Resolves a domain for the UDP protocol with DGRAM type, and yields each
possible Addrinfo
. See #resolve
for details.
Instance Method Detail
Appends this struct's name and instance variables names and values to the given IO.
struct Point
def initialize(@x : Int32, @y : Int32)
end
end
p1 = Point.new 1, 2
p1.to_s # "Point(@x=1, @y=2)"
p1.inspect # "Point(@x=1, @y=2)"