class TCPSocket

Overview

A Transmission Control Protocol (TCP/IP) socket.

Usage example:

client = TCPSocket.new("localhost", 1234)
client << "message\n"
response = client.gets
client.close

Direct Known Subclasses

Defined in:

socket/tcp_socket.cr

Class Method Summary

Instance Method Summary

Instance methods inherited from class IPSocket

local_address local_address, remote_address remote_address

Instance methods inherited from class Socket

broadcast=(val : Bool) broadcast=, broadcast? broadcast?, close_read close_read, close_write close_write, getsockopt(optname, optval, level = LibC::SOL_SOCKET) getsockopt, inspect(io) inspect, keepalive=(val : Bool) keepalive=, keepalive? keepalive?, linger linger, linger=(val : Int | Nil) linger=, recv_buffer_size recv_buffer_size, recv_buffer_size=(val : Int32) recv_buffer_size=, reuse_address=(val : Bool) reuse_address=, reuse_address? reuse_address?, send_buffer_size send_buffer_size, send_buffer_size=(val : Int32) send_buffer_size=, setsockopt(optname, optval, level = LibC::SOL_SOCKET) setsockopt

Class methods inherited from class Socket

ip?(string : String) ip?, new(fd, blocking = false) new

Instance methods inherited from class IO::FileDescriptor

blocking blocking, blocking=(value) blocking=, close_on_exec=(arg : Bool) close_on_exec=, close_on_exec? close_on_exec?, closed? : Bool closed?, cooked(&block) cooked, cooked! cooked!, fcntl(cmd, arg = 0) fcntl, fd : Int32 fd, finalize finalize, inspect(io) inspect, noecho(&block) noecho, noecho! noecho!, pos pos, pos=(value) pos=, raw(&block) raw, raw! raw!, read_timeout=(read_timeout : Time::Span)
read_timeout=(read_timeout : Number)
read_timeout=(read_timeout : Nil) read_timeout=, reopen(other : IO::FileDescriptor) reopen, seek(offset, whence : Seek = Seek::Set) seek, stat stat, tell tell, tty? tty?, write_timed_out : Bool write_timed_out, write_timed_out=(write_timed_out : Bool) write_timed_out=, write_timeout=(write_timeout : Number)
write_timeout=(write_timeout : Nil)
write_timeout=(write_timeout : Time::Span) write_timeout=

Class methods inherited from class IO::FileDescriptor

fcntl(fd, cmd, arg = 0) fcntl, new(fd : Int32, blocking = false, edge_triggerable = false) new

Instance methods inherited from module IO::Buffered

close close, flush flush, flush_on_newline=(flush_on_newline) flush_on_newline=, flush_on_newline? flush_on_newline?, read(slice : Slice(UInt8)) read, rewind rewind, sync=(sync) sync=, sync? sync?, unbuffered_close unbuffered_close, unbuffered_flush unbuffered_flush, unbuffered_read(slice : Slice(UInt8)) unbuffered_read, unbuffered_rewind unbuffered_rewind, unbuffered_write(slice : Slice(UInt8)) unbuffered_write, write(slice : Slice(UInt8)) write

Instance methods inherited from module IO

<<(obj) : self <<, close close, closed? closed?, each_byte(&block)
each_byte each_byte, each_char(&block)
each_char each_char, each_line(*args, **options)
each_line(*args, **options, &block) each_line, encoding : String encoding, flush flush, gets(limit : Int) : String | Nil
gets(delimiter : Char, limit : Int) : String | Nil
gets(delimiter : Char) : String | Nil
gets : String | Nil
gets(delimiter : String) : String | Nil gets, gets_to_end : String gets_to_end, print(obj) : Nil
print(*objects : _) : Nil print, printf(format_string, *args) : Nil
printf(format_string, args : Array | Tuple) : Nil printf, puts(*objects : _) : Nil
puts : Nil
puts(string : String) : Nil
puts(obj) : Nil puts, read(slice : Slice(UInt8)) read, read_byte : UInt8 | Nil read_byte, read_bytes(type, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) read_bytes, read_char : Char | Nil read_char, read_fully(slice : Slice(UInt8)) read_fully, read_line(*args, **options) : String | Nil read_line, read_utf8(slice : Slice(UInt8)) read_utf8, read_utf8_byte read_utf8_byte, rewind rewind, set_encoding(encoding : String, invalid : Symbol | Nil = nil) set_encoding, skip(bytes_count : Int) : Nil skip, tty? : Bool tty?, write(slice : Slice(UInt8)) : Nil write, write_byte(byte : UInt8) write_byte, write_bytes(object, format : IO::ByteFormat = IO::ByteFormat::SystemEndian) write_bytes, write_utf8(slice : Slice(UInt8)) write_utf8

Class methods inherited from module IO

copy(src, dst, limit : Int)
copy(src, dst) copy, pipe(read_blocking = false, write_blocking = false, &block)
pipe(read_blocking = false, write_blocking = false) pipe, select(read_ios, write_ios, error_ios, timeout_sec : LibC::TimeT | Int | Float | Nil)
select(read_ios, write_ios = nil, error_ios = nil) select

Instance methods inherited from module JSON::Builder

json_array(&block) json_array, json_object(&block) json_object

Instance methods inherited from class Reference

==(other)
==(other : self) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other)
===(other : YAML::Any)
===(other : JSON::Any) ===, =~(other) =~, class class, crystal_type_id crystal_type_id, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml
to_yaml(io : IO) to_yaml, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, clone clone, dup dup, from_json(string_or_io) : self
from_json(string_or_io, root : String) : self from_json, from_yaml(string : String) : self from_yaml, hash hash, inspect(io) inspect, name : String name, nilable? nilable?, to_s(io) to_s, |(other : U.class) |

Class Method Detail

def self.new(fd : Int32) #

[View source]
def self.new(host, port, dns_timeout = nil, connect_timeout = nil) #

Creates a new TCP connection to a remote TCP server.

You may limit the DNS resolution time with dns_timeout and limit the connection time to the remote server with connect_timeout. Both values must be in seconds (integers or floats).

Note that dns_timeout is currently ignored.


[View source]
def self.open(host, port, &block) #

Opens a TCP socket to a remote TCP server, yields it to the block, then eventually closes the socket when the block returns.

Returns the value of the block.


[View source]

Instance Method Detail

def tcp_keepalive_count #

The number of probes sent, without response before dropping the connection.


[View source]
def tcp_keepalive_count=(val : Int) #

[View source]
def tcp_keepalive_idle #

The amount of time in seconds the connection must be idle before sending keepalive probes.


[View source]
def tcp_keepalive_idle=(val : Int) #

[View source]
def tcp_keepalive_interval #

The amount of time in seconds between keepalive probes.


[View source]
def tcp_keepalive_interval=(val : Int) #

[View source]
def tcp_nodelay=(val : Bool) #

Disable the Nagle algorithm when set to true, otherwise enables it.


[View source]
def tcp_nodelay? #

Returns true if the Nable algorithm is disabled.


[View source]