UniSocket

Let your swift application talk to others via TCP, UDP or unix sockets.

Usage

Check if there is sshd running on the system:

import UniSocket

do {
    let socket = try UniSocket(type: .tcp, peer: "localhost", port: 22)
    try socket.attach()
    let data = try socket.recv()
    let string = String(data: data, encoding: .utf8)
    print("server responded with:")
    print(string)
    try socket.close()
} catch UniSocketError.error(let detail) {
    print(detail)
}

Send HTTP request and wait for response of a minimal required size:

import UniSocket

do {
    let socket = try UniSocket(type: .tcp, peer: "2a02:598:2::1053", port: 80)
    try socket.attach()
    let request = "HEAD / HTTP/1.0\r\n\r\n"
    let dataOut = request.data(using: .utf8)
    try socket.send(dataOut!)
    let dataIn = try socket.recv(min: 16)
    let string = String(data: dataIn, encoding: .utf8)
    print("server responded with:")
    print(string)
    try socket.close()
} catch UniSocketError.error(let detail) {
    print(detail)
}

Query DNS server over UDP using custom timeout values:

import UniSocket
import DNS // https://github.com/Bouke/DNS

do {
    let timeout: UniSocketTimeout = (connect: 2, read: 2, write: 1)
    let socket = try UniSocket(type: .udp, peer: "8.8.8.8", port: 53, timeout: timeout)
    try socket.attach() // NOTE: due to .udp, the call doesn't make a connection, just prepares socket and resolves hostname
    let request = Message(type: .query, recursionDesired: true, questions: [Question(name: "www.apple.com.", type: .host)])
    let requestData = try request.serialize()
    try socket.send(requestData)
    let responseData = try socket.recv()
    let response = try Message.init(deserialize: responseData)
    print("server responded with:")
    print(response)
    try socket.close()
} catch UniSocketError.error(let detail) {
    print(detail)
}

Check if local MySQL server is running:

import UniSocket

do {
    let socket = try UniSocket(type: .local, peer: "/tmp/mysql.sock")
    try socket.attach()
    let data = try socket.recv()
    print("server responded with:")
    print("\(data.map { String(format: "%c", $0) }.joined())")
    try socket.close()
} catch UniSocketError.error(let detail) {
    print(detail)
}

Credits

Written by Daniel Fojt, copyright Seznam.cz, licensed under the terms of the Apache License 2.0.