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{{task|Networking and Web Interaction}} [[Category:Web]]
{{omit from|GUISS}}
The browser is the new [[GUI]]!
{{omit from|Locomotive Basic|No sockets}}
{{omit from|Lotus 123 Macro Scripting}}
{{omit from|Maxima}}
{{omit from|ML/I|No sockets}}
{{omit from|Retro}}
{{omit from|SQL PL|It does not listen any port different to the database server and it does not has daemons - No sockets}}
{{omit from|TI-83 BASIC}}
{{omit from|ZX Spectrum Basic|No sockets}}
 
The browser is the new [[GUI]] !
 
 
;Task:
Serve our standard text &nbsp; <big><big><code>Goodbye, World!</code></big></big> &nbsp; to &nbsp; http://localhost:8080/ &nbsp; so that it can be viewed with a web browser.
 
The provided solution must start or implement a server that accepts multiple client connections and serves text as requested.
 
Note that starting a web browser or opening a new window with this URL
is not part of the task.
 
Additionally, it is permissible to serve the provided page as a plain text file (there is no requirement to serve properly formatted [[HTML]] here).
The task is to serve our standard text "Goodbye, World!" to http://localhost:8080/ so that it can be viewed with a web browser. The provided solution must start or implement a server that accepts multiple client connections and serves text as requested.
 
Note that starting a web browser or opening a new window with this URL is not part of the task. Additionally, it is permissible to serve the provided page as a plain text file (there is no requirement to serve properly formatted [[HTML]] here). The browser will generally do the right thing with simple text like this.
<br><br>
 
=={{header|Ada}}==
{{libheader|AWS}}
Uses many defaults, such as 5 max simultaneous connections.
<langsyntaxhighlight lang="ada">
with AWS; use AWS;
with AWS.Response;
Line 29 ⟶ 49:
Server.Shutdown (TheServer);
end HelloHTTP;
</syntaxhighlight>
</lang>
 
=={{header|Aime}}==
Goodbye, world! with random colors and socket polling:
<syntaxhighlight lang="aime">void
serve(dispatch w, file s, list colors)
{
file i, o;
date d;
 
accept(i, o, s, 0);
f_(o, "HTTP/1.1 200 OK\n"
"Content-Type: text/html; charset=UTF-8\n\n"
"<!DOCTYPE html><html><head><title>Bye-bye baby bye-bye</title>"
"<style>body { background-color: #111 }"
"h1 { font-size:4cm; text-align: center; color: black;"
" text-shadow: 0 0 2mm ", colors[drand(3)], "}</style></head>"
"<body><h1>Goodbye, world!</h1></body></html>\n");
 
# chrome won't show the page if we close right away. we'll close in 2s.
d.now;
d.offset(2, 0);
w_schedule(w, d, f_close, i);
}
 
 
integer
main(void)
{
dispatch w;
file s;
 
tcpip_listen(s, 8080, 0);
w_watch(w, s, serve, w, s, list("blue", "green", "red", "yellow"));
w_press(w);
 
return 0;
}</syntaxhighlight>
Or simply:
<syntaxhighlight lang="aime">file i, o, s;
 
tcpip_listen(s, 8080, 0);
while (1) {
accept(i, o, s, 0);
f_(o, "HTTP/1.1 200 OK\n"
"Content-Type: text/html; charset=UTF-8\n\n"
"<!DOCTYPE html><html><head><title>baby bye-bye</title></head>"
"<body><h1>Goodbye, world!</h1></body></html>\n");
f_flush(o);
}</syntaxhighlight>
 
=={{header|Amazing Hopper}}==
VERSION 1: "Hopper" flavour:
<syntaxhighlight lang="amazing hopper">
// Hello world! mode Server
 
#include <hopper.h>
main:
fd=0,fdc=0,message=""
{"HTTP/1.1 200 OK\n","Content-Type: text/html; charset=UTF-8\n\n"}cat
{"<!DOCTYPE html><html><head><title>Bye-bye baby bye-bye</title>"},cat
{"<style>body { background-color: #111 },cat
{"h1 { font-size:4cm; text-align: center; color: black; text-shadow: 0 0 2mm red}</style>"}cat
{"</head><body><h1>Goodbye, world!</h1></body></html>\n"}cat,
mov(message)
 
/* Open socket in localhost (by default) */
/* Accept 5 conections (there are also 5 by default, if you put "any weá" there) */
{5,8080}socket (OPENTCPSRV), mov(fd)
 
/* accept conection & send message */
accept(fd), mov(fdc)
{message},send(fdc)
 
/* close all */
{fdc}socket(CLOSESOCK)
{fd}socket(CLOSESOCK)
exit(0)
</syntaxhighlight>
VERSION 2: "Hopper-BASIC" flavour
<syntaxhighlight lang="amazing hopper">
// Hello world! mode Server: desde el navegador, escriba localhost:8080
 
#include <hbasic.h>
Begin
Declare as Numeric (fd,fdc)
as Alpha (message,HEAD,head,body,form,html)
Let ( HEAD := Cat$("HTTP/1.1 200 OK\n","Content-Type: text/html; charset=UTF-8\n\n") + ("<!DOCTYPE html>\n") )
 
ParsNormal$("title","","Bye-bye baby bye-bye")(head)
ParsNormal$("style","","body { background-color: #111 } h1 { font-size:4cm; text-align: center; color: black; text-shadow: 0 0 2mm red}")(head)
ParsNormal$("head","",head)(html)
ParsNormal$("h1","","Goodbye, world!")(body)
ParsNormal$("body","",body)(html)
ParsNormal$("html","",html)(form)
Let( form := Cat$(HEAD,form))
Let( message := Tran$(">\n<","><", form) )
Print( message, Newl)
 
/* Open socket in localhost (by default) */
Let( fd := OpenServerTCP(3,8080) )
 
/* accept conection & send message */
Let( fdc := Accept(fd) )
Send(message,fdc)
 
/* close all */
CloseSocket(fdc)
CloseSocket(fd)
End
</syntaxhighlight>
{{out}}
<pre>Open your browser, and type in the navigation bar: "localhost: 8080": It will show "Goodbye World!" in huge letters and adorable lovecraftian colors!
</pre>
 
=={{header|AntLang}}==
In plain AntLang:
<syntaxhighlight lang="antlang">serv: httprun[8080; {"HTTP/1.0 200 OK\r\nContent-Type: text/plain\r\n\r\nGoodbye, World!"}]</syntaxhighlight>
 
Using ALC:
<syntaxhighlight lang="antlang">load["handlers.ant"]
serv: httprun[8080; {httpwrap["Goodbye, World!"]}]</syntaxhighlight>
 
To close the server:
<syntaxhighlight lang="antlang">kill[serv]</syntaxhighlight>
 
=={{header|Arturo}}==
 
<syntaxhighlight lang="rebol">serve.port:8080 [ GET "/" -> "Goodbye, World!" ]</syntaxhighlight>
 
{{out}}
 
If you navigate to "localhost:8080" through our web browser, we'll see the message:
 
<pre>Goodbye, World!</pre>
 
=={{header|AutoIt}}==
<syntaxhighlight lang="autoit">
TCPStartup()
$socket = TCPListen("0.0.0.0",8080)
$string = "Goodbye, World!"
While 1
Do
$newConnection = TCPAccept($socket)
Sleep(1)
Until $newConnection <> -1
$content = TCPRecv($newConnection, 2048)
If StringLen($content) > 0 Then
TCPSend($newConnection, Binary("HTTP/1.1 200 OK" & @CRLF))
TCPSend($newConnection, Binary("Content-Type: text/html" & @CRLF))
TCPSend($newConnection, Binary("Content-Length: "& BinaryLen($string) & @CRLF & @CRLF))
TCPSend($newConnection, $string)
EndIf
TCPCloseSocket($newConnection)
WEnd
</syntaxhighlight>
 
=={{header|AWK}}==
With GNU AWK (gawk) a simple web server can be implemented. The example is taken from here<br>
The example is taken from
[http://www.gnu.org/software/gawk/manual/gawkinet/gawkinet.html#Primitive-Service]
(Documentation is licensed under GNU Free Documentation License, Version 1.3)
<langsyntaxhighlight AWKlang="awk">#!/usr/bin/gawk -f
BEGIN {
RS = ORS = "\r\n"
Line 49 ⟶ 230:
continue;
close(HttpService)
}</langsyntaxhighlight>
 
=={{header|BASIC}}==
==={{header|BaCon}}===
Requires BaCon 4.2 or higher.
<syntaxhighlight lang="bacon">' Define HTTP constants
CONST New$ = CHR$(13) & NL$
CONST Sep$ = CHR$(13) & NL$ & CHR$(13) & NL$
CONST Msg$ = "<html><head>BaCon web greeting</head><body><h2>Goodbye, World!</h2></body></html>"
 
' Get our IP
Ip$ = "localhost"
PRINT "Connect from browser '", Ip$, ":8080'."
 
' Ignore child signals to avoid zombie processes
SIGNAL SIG_IGN, SIGCHLD
 
' Open listening port
OPEN Ip$ & ":8080" FOR SERVER AS mynet
 
' Keep receiving requests
WHILE TRUE
 
' Handle for newly incoming connection
fd = ACCEPT(mynet)
 
' Incoming connection -> create background process
spawn = FORK
 
' We are in the child
IF spawn = 0 THEN
 
' Get the request
REPEAT
RECEIVE dat$ FROM fd
PRINT dat$
UNTIL RIGHT$(dat$, 4) = Sep$
 
' Reply that we're OK
SEND "HTTP/1.1 200 Ok" & New$ & "Content-Length: " & STR$(LEN(Msg$)) & Sep$ & Msg$ TO fd
 
' Close connection
CLOSE SERVER fd
 
' End this process
ENDFORK
ENDIF
WEND</syntaxhighlight>
 
==={{header|BBC BASIC}}===
{{works with|BBC BASIC for Windows}}
This explicitly supports multiple concurrent connections.
<syntaxhighlight lang="bbcbasic"> INSTALL @lib$+"SOCKLIB"
PROC_initsockets
maxSess% = 8
DIM sock%(maxSess%-1), rcvd$(maxSess%-1), Buffer% 255
ON ERROR PRINT REPORT$ : PROC_exitsockets : END
ON CLOSE PROC_exitsockets : QUIT
port$ = "8080"
host$ = FN_gethostname
PRINT "Host name is " host$
listen% = FN_tcplisten(host$, port$)
PRINT "Listening on port ";port$
REPEAT
socket% = FN_check_connection(listen%)
IF socket% THEN
FOR i% = 0 TO maxSess%-1
IF sock%(i%) = 0 THEN
sock%(i%) = socket%
rcvd$(i%) = ""
PRINT "Connection on socket "; sock%(i%) " opened"
EXIT FOR
ENDIF
NEXT i%
listen% = FN_tcplisten(host$, port$)
ENDIF
FOR i% = 0 TO maxSess%-1
IF sock%(i%) THEN
res% = FN_readsocket(sock%(i%), Buffer%, 256)
IF res% >= 0 THEN
Buffer%?res% = 0
rcvd$(i%) += $$Buffer%
IF LEFT$(rcvd$(i%),4) = "GET " AND ( \
\ RIGHT$(rcvd$(i%),4) = CHR$13+CHR$10+CHR$13+CHR$10 OR \
\ RIGHT$(rcvd$(i%),4) = CHR$10+CHR$13+CHR$10+CHR$13 OR \
\ RIGHT$(rcvd$(i%),2) = CHR$10+CHR$10 ) THEN
rcvd$(i%) = ""
IF FN_writelinesocket(sock%(i%), "HTTP/1.0 200 OK")
IF FN_writelinesocket(sock%(i%), "Content-type: text/html")
IF FN_writelinesocket(sock%(i%), "")
IF FN_writelinesocket(sock%(i%), "<html><head><title>Hello World!</title></head>")
IF FN_writelinesocket(sock%(i%), "<body><h1>Hello World!</h1>")
IF FN_writelinesocket(sock%(i%), "</body></html>")
PROC_closesocket(sock%(i%))
PRINT "Connection on socket " ; sock%(i%) " closed (local)"
sock%(i%) = 0
ENDIF
ELSE
PROC_closesocket(sock%(i%))
PRINT "Connection on socket " ; sock%(i%) " closed (remote)"
sock%(i%) = 0
ENDIF
ENDIF
NEXT i%
WAIT 0
UNTIL FALSE
END</syntaxhighlight>
 
=={{header|C}}==
This is, um, slightly longer than what other languages would be.
<langsyntaxhighlight Clang="c">#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
Line 65 ⟶ 359:
char response[] = "HTTP/1.1 200 OK\r\n"
"Content-Type: text/html; charset=UTF-8\r\n\r\n"
"<doctype !DOCTYPE html><html><head><title>Bye-bye baby bye-bye</title>"
"<style>body { background-color: #111 }"
"h1 { font-size:4cm; text-align: center; color: black;"
Line 73 ⟶ 367:
int main()
{
int one = 1, client_fd;
struct sockaddr_in svr_addr, cli_addr;
socklen_t sin_len = sizeof(cli_addr);
 
int sock = socket(AF_INET, SOCK_STREAM, 0);
if (sock < 0)
err(1, "can't open socket");
 
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(int));
 
int port = 8080;
svr_addr.sin_family = AF_INET;
svr_addr.sin_addr.s_addr = INADDR_ANY;
svr_addr.sin_port = htons(port);
 
if (bind(sock, (struct sockaddr *) &svr_addr, sizeof(svr_addr)) == -1) {
close(sock);
err(1, "Can't bind");
}
 
listen(sock, 5);
while (1) {
client_fd = accept(sock, (struct sockaddr *) &cli_addr, &sin_len);
printf("got connection\n");
 
if (client_fd == -1) {
perror("Can't accept");
continue;
}
}
 
write(client_fd, response, sizeof(response) - 1); /*-1:'\0'*/
close(client_fd);
}
}</langsyntaxhighlight>
 
=={{header|C++}}==
C version compiles as C++ (known for G++ on Linux)
=={{header|C sharp|C#}}==
<langsyntaxhighlight CSharplang="csharp">using System.Text;
using System.Net.Sockets;
using System.Net;
Line 137 ⟶ 429:
}
}
}</langsyntaxhighlight>
{{works with|NancyFX}}<syntaxhighlight lang="csharp">namespace Webserver
{
using System;
using Nancy;
using Nancy.Hosting.Self;
 
public class HelloWorldModule : NancyModule
{
public HelloWorldModule()
{
this.Get["/"] = parameters => "Goodbye, world!";
}
 
public static void Main()
{
var uri = new Uri("http://localhost:8080");
using (var host = new NancyHost(uri))
{
host.Start();
Console.WriteLine("Web server is now running!");
Console.WriteLine("Press 'Enter' to exit.");
Console.ReadLine();
}
}
}
}</syntaxhighlight>
 
=={{header|C++}}==
C version compiles as C++ (known for G++ on Linux)
 
=={{header|Clojure}}==
Taken from: [https://github.com/weavejester/compojure/wiki/Getting-Started Compojure's Getting Started doc].
 
<tt>> lein new compojure goodbye-world</tt>
 
File: src/goodbye_world/handler.clj
<syntaxhighlight lang="clojure">(ns goodbye-world.handler
(:require [compojure.core :refer :all]
[compojure.handler :as handler]
[compojure.route :as route]))
 
(defroutes app-routes
(GET "/" [] "Goodbye, World!")
(route/resources "/")
(route/not-found "Not Found"))
 
(def app
(handler/site app-routes))</syntaxhighlight>
 
To start up the server on port 8080, run the following from the project's root:
 
<tt>> lein ring server-headless 8080</tt>
 
=={{header|Common Lisp}}==
 
Here's the example with a pre-built server:
 
<syntaxhighlight lang="lisp">(ql:quickload :hunchentoot)
(defpackage :hello-web (:use :cl :hunchentoot))
(in-package :hello-web)
 
(define-easy-handler (hello :uri "/") () "Goodbye, World!")
 
(defparameter *server* (hunchentoot:start (make-instance 'hunchentoot:easy-acceptor :port 8080)))</syntaxhighlight>
 
----
 
Here's an example of doing everything manually
 
<syntaxhighlight lang="lisp">(ql:quickload :usocket)
(defpackage :hello-web-manual (:use :cl :usocket))
(in-package :hello-web-manual)
 
(defun crlf (&optional (stream *standard-output*))
(write-char #\return stream)
(write-char #\linefeed stream)
(values))
 
(defun ln (string &optional (stream *standard-output*))
(write-string string stream)
(crlf stream))
 
(defun read-all (stream)
(loop for char = (read-char-no-hang stream nil :eof)
until (or (null char) (eq char :eof)) collect char into msg
finally (return (values msg char))))
 
(defun serve (port &optional (log-stream *standard-output*))
(let ((connections (list (socket-listen "127.0.0.1" port :reuse-address t))))
(unwind-protect
(loop
(loop for ready in (wait-for-input connections :ready-only t)
do (if (typep ready 'stream-server-usocket)
(push (socket-accept ready) connections)
(let* ((stream (socket-stream ready)))
(read-all stream)
(format log-stream "Got message...~%")
(mapc (lambda (line) (ln line stream))
(list "HTTP/1.1 200 OK"
"Content-Type: text/plain; charset=UTF-8"
""
"Hello world!"))
(socket-close ready)
(setf connections (remove ready connections))))))
(loop for c in connections do (loop while (socket-close c))))))
 
(serve 8080)</syntaxhighlight>
 
=={{header|Crystal}}==
 
<syntaxhighlight lang="crystal">
require "http/server"
 
server = HTTP::Server.new do |context|
context.response.print "Goodbye World"
end
 
server.listen(8080)
</syntaxhighlight>
 
=={{header|D}}==
Using sockets only, also shows use of heredoc syntax and std.array.replace.
''If you copy from this page, be careful with extraneous spaces on the empty lines in the heredoc''.
 
<syntaxhighlight lang="d">import std.socket, std.array;
 
ushort port = 8080;
 
void main() {
Socket listener = new TcpSocket;
listener.bind(new InternetAddress(port));
listener.listen(10);
 
Socket currSock;
 
while (null !is (currSock = listener.accept())) {
currSock.sendTo(replace(q"EOF
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
 
<html>
<head><title>Hello world</title></head>
<body>Goodbye, World!</body>
</html>
EOF", "\n", "\r\n"));
currSock.close();
}
}
</syntaxhighlight>
 
=={{header|Dart}}==
<syntaxhighlight lang="d">import 'dart:io';
 
main() async {
var server = await HttpServer.bind('127.0.0.1', 8080);
await for (HttpRequest request in server) {
request.response
..write('Hello, world')
..close();
}
}</syntaxhighlight>
 
=={{header|Delphi}}==
<langsyntaxhighlight Delphilang="delphi">program HelloWorldWebServer;
 
{$APPTYPE CONSOLE}
Line 189 ⟶ 643:
lWebServer.Free;
end;
end.</langsyntaxhighlight>
 
=={{header|Dylan.NET|Dylan.NET}}==
<syntaxhighlight lang="dylan.net">
//compile with dylan.NET 11.5.1.2 or later!!
#refstdasm "mscorlib.dll"
#refstdasm "System.dll"
 
import System.Text
import System.Net.Sockets
import System.Net
 
assembly helloweb exe
ver 1.1.0.0
 
namespace WebServer
 
class public GoodByeWorld
method public static void main(var args as string[])
var msg as string = c"<html>\n<body>\nGoodbye, world!\n</body>\n</html>\n"
var port as integer = 8080
var serverRunning as boolean = true
 
var tcpListener as TcpListener = new TcpListener(IPAddress::Any, port)
tcpListener::Start()
 
do while serverRunning
var socketConnection as Socket = tcpListener::AcceptSocket()
var bMsg as byte[] = Encoding::get_ASCII()::GetBytes(msg::ToCharArray(), 0, msg::get_Length())
socketConnection::Send(bMsg)
socketConnection::Disconnect(true)
end do
end method
 
end class
 
end namespace
</syntaxhighlight>
 
=={{header|Erlang}}==
Using builtin HTTP server with call back to do/1.
It only lasts 30 seconds (30000 milliseconds), then it is stopped.
I fail to see how a longer time will serve any purpose.
 
<syntaxhighlight lang="erlang">
-module( hello_world_web_server ).
 
-export( [do/1, httpd_start/2, httpd_stop/1, task/0] ).
 
do( _Data ) ->
{proceed, [{response,{200,"Goodbye, World!"}}]}.
 
httpd_start( Port, Module ) ->
Arguments = [{bind_address, "localhost"}, {port, Port}, {ipfamily, inet},
{modules, [Module]},
{server_name,erlang:atom_to_list(Module)}, {server_root,"."}, {document_root,"."}],
{ok, Pid} = inets:start( httpd, Arguments, stand_alone ),
Pid.
httpd_stop( Pid ) ->
inets:stop( stand_alone, Pid ).
 
task() ->
Pid = httpd_start( 8080, ?MODULE ),
timer:sleep( 30000 ),
httpd_stop( Pid ).
</syntaxhighlight>
 
=={{header|Fantom}}==
<langsyntaxhighlight lang="fantom">using web
using wisp
 
Line 216 ⟶ 739:
while (true) {} // stay running
}
}</langsyntaxhighlight>
 
=={{header|Fortran}}==
There is no network library in fortran. Use C interoperability and some C compatible library or just start node.js simple web server:
<syntaxhighlight lang="fortran">
program http_example
implicit none
character (len=:), allocatable :: code
character (len=:), allocatable :: command
logical :: waitForProcess
 
! Execute a Node.js code
code = "const http = require('http'); http.createServer((req, res) => &
{res.end('Hello World from a Node.js server started from Fortran!')}).listen(8080);"
 
command = 'node -e "' // code // '"'
call execute_command_line (command, wait=waitForProcess)
 
end program http_example
</syntaxhighlight>
 
=={{header|Free Pascal}}==
<syntaxhighlight lang="pascal">program HelloWorldServer;
{$mode objfpc}{$H+}
uses
Classes, fphttpserver;
 
Type
TTestHTTPServer = Class(TFPHTTPServer)
public
procedure HandleRequest(Var ARequest: TFPHTTPConnectionRequest;
Var AResponse : TFPHTTPConnectionResponse); override;
end;
 
Var
Serv : TTestHTTPServer;
 
procedure TTestHTTPServer.HandleRequest(var ARequest: TFPHTTPConnectionRequest;
var AResponse: TFPHTTPConnectionResponse);
Var
F : TStringStream;
begin
F:=TStringStream.Create('Hello,World!');
try
AResponse.ContentLength:=F.Size;
AResponse.ContentStream:=F;
AResponse.SendContent;
AResponse.ContentStream:=Nil;
finally
F.Free;
end;
end;
 
begin
Serv:=TTestHTTPServer.Create(Nil);
try
Serv.Threaded:=False;
Serv.Port:=8080;
Serv.AcceptIdleTimeout:=1000;
Serv.Active:=True;
finally
Serv.Free;
end;
end.</syntaxhighlight>
 
 
=={{header|Frink}}==
Frink has a web server platform that runs in a Java servlet container called [https://frinklang.org/fspdocs.html Frink Server Pages] which should be used for real-world applications. However, the following is a simple single-threaded web server for the purposes of this task.
<syntaxhighlight lang="frink">ss = newJava["java.net.ServerSocket", 8080]
while true
{
sock = ss.accept[];
w = new Writer[sock.getOutputStream[]]
w.println["HTTP/1.1 200 OK"]
w.println["Content-Type: text/plain\n"]
w.println["Goodbye, World!"]
w.close[]
}</syntaxhighlight>
 
=={{header|FunL}}==
<syntaxhighlight lang="funl">native java.io.PrintWriter
native java.net.ServerSocket
 
val port = 8080
val listener = ServerSocket( port )
 
printf( 'Listening at port %1$d\n', port )
 
forever
socket = listener.accept()
PrintWriter( socket.getOutputStream(), true ).println( 'hello world' )
socket.shutdownOutput()
socket.close()</syntaxhighlight>
 
=={{header|Gastona}}==
A minimal graphical user interface, a console, is included to allow
following the server activity and also being able to quit it by closing the window.
But it is not stritctly needed, just the unit #listix# would do the job.
<syntaxhighlight lang="gastona">#javaj#
 
<frames> oConsole
 
#listix#
 
<main>
MICOHTTP, START, myServer, 8080
<GET />
//<html><body>
// Goodbye world!
//</body></html>
</syntaxhighlight>
 
=={{header|Genie}}==
<syntaxhighlight lang="genie">/**
* Based on https://wiki.gnome.org/Projects/Genie/GIONetworkingSample
* Based on an example of Jezra Lickter http://hoof.jezra.net/snip/nV
*
* valac --pkg gio-2.0 --pkg gee-0.8 webserver.gs
* ./webserver
*/
[indent=8]
uses
GLib
Gee
 
init
var ws = new WebServer()
ws.run()
 
struct Request
full_request : string
path : string
query : string
 
struct Response
status_code : string
content_type : string
data : string
 
class WebServer
 
def run()
port : uint16 = 8080
tss : ThreadedSocketService = new ThreadedSocketService(100)
ia : InetAddress = new InetAddress.any(SocketFamily.IPV4)
isaddr : InetSocketAddress = new InetSocketAddress(ia, port)
try
tss.add_address(isaddr, SocketType.STREAM, SocketProtocol.TCP, null, null);
except e : Error
stderr.printf("%s\n", e.message)
return
// add connection handler
tss.run.connect( connection_handler )
 
ml : MainLoop = new MainLoop()
tss.start()
stdout.printf("Serving on port %d\n", port)
ml.run()
 
def connection_handler ( conn : SocketConnection ) : bool
first_line : string = ""
size : size_t = 0;
request : Request = Request()
dis : DataInputStream = new DataInputStream (conn.input_stream)
dos : DataOutputStream = new DataOutputStream (conn.output_stream)
try
first_line = dis.read_line(out size)
// here you could analyze request information
var parts = first_line.split(" ");
if parts.length > 1 do request.full_request = parts[1]
except e : Error
stderr.printf("%s\n", e.message)
response : Response = Response()
response.status_code = "HTTP/1.1 200 OK\n"
response.content_type = "text/html"
response.data = "<html><body><h1>Goodbye, World!</h1></body></html>"
serve_response ( response, dos )
return false
 
def serve_response ( response : Response, dos : DataOutputStream )
try
dos.put_string (response.status_code)
dos.put_string ("Server: Genie Socket\n")
dos.put_string("Content-Type: %s\n".printf(response.content_type))
dos.put_string("Content-Length: %d\n".printf(response.data.length))
dos.put_string("\n");//this is the end of the return headers
dos.put_string(response.data)
except e : Error
stderr.printf("%s\n", e.message)</syntaxhighlight>
 
{{out}}
<pre>prompt$ valac --pkg gio-2.0 --pkg gee-0.8 webserver.gs
prompt$ ./webserver
Serving on port 8080</pre>
Showing
<pre>prompt$ curl http://localhost:8080
<html><body><h1>Goodbye, World!</h1></body></html></pre>
 
=={{header|Go}}==
<langsyntaxhighlight lang="go">package main
 
import (
"fmt"
"net/httplog"
"net/http"
)
 
func main() {
http.HandleFunc("/", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintln(w, "Goodbye, World!")
func(w http.ResponseWriter, req *http.Request) {
})
fmt.Fprintln(w, "Goodbye, World!")
log.Fatal(http.ListenAndServe(":8080", nil))
})
}
if err := http.ListenAndServe(":8080", nil); err != nil {
</syntaxhighlight>
fmt.Println(err)
}
}</lang>
 
=={{header|Haskell}}==
 
Lightweightly concurrent "hello world" web server using the [http://www.yesodweb.com/book/conduits conduit] stack:
using the [http://www.yesodweb.com/book/conduits conduit] stack:
 
<langsyntaxhighlight lang="haskell">{-# LANGUAGE OverloadedStrings #-}
 
import Data.ByteString.Char8 ()
Line 248 ⟶ 968:
main :: IO ()
main = runTCPServer (ServerSettings 8080 "127.0.0.1") $ const (yield response $$)
where response = "HTTP/1.0 200 OK\nContent-Length: 16\n\nGoodbye, World!\n"</langsyntaxhighlight>
 
Or using only "standard" features ([http://hackage.haskell.org/package/base base], [http://hackage.haskell.org/package/bytestring bytestring] and [http://hackage.haskell.org/package/network network] from the [http://hackage.haskell.org/platform/ Haskell Platform]):
 
<langsyntaxhighlight lang="haskell">{-# LANGUAGE OverloadedStrings #-}
 
import Data.ByteString.Char8 ()
Line 266 ⟶ 986:
loop s = forever $ forkIO . request . fst =<< accept s
request c = sendAll c response `finally` sClose c
response = "HTTP/1.0 200 OK\nContent-Length: 16\n\nGoodbye, World!\n"</langsyntaxhighlight>
 
Both works like this:
Line 277 ⟶ 997:
Request rate: 8202.5 req/s (0.1 ms/req)
Errors: total 10000 client-timo 0 socket-timo 0 connrefused 0 connreset 10000
 
Or using warp ([http://hackage.haskell.org/package/warp warp] [https://wiki.haskell.org/Web/Servers#Warp warp example] [http://aosabook.org/en/posa/warp.html about warp]):
 
<syntaxhighlight lang="haskell">{-# LANGUAGE OverloadedStrings #-}
import Network.Wai
import Network.Wai.Handler.Warp
import Network.HTTP.Types (status200)
import Blaze.ByteString.Builder (copyByteString)
import qualified Data.ByteString.UTF8 as BU
import Data.Monoid
main = do
let port = 8080
putStrLn $ "Listening on port " ++ show port
run port app
app req respond = respond $
case pathInfo req of
x -> index x
index x = responseBuilder status200 [("Content-Type", "text/plain")] $ mconcat $ map copyByteString
[ "Hello World!\n" ]</syntaxhighlight>
 
Work like this:
$ curl http://localhost:8080/
Hello World!
#httperf --server localhost --port 8080 --num-conns 10000 --num-calls 100
Request rate: 43565.8 req/s (0.0 ms/req)
#httperf --server localhost --port 8080 --num-conns 100000 --num-calls 200
Request rate: 43902.9 req/s (0.0 ms/req)
 
without any errors
 
Comparing to [http://www.nginx.org/ nginx]:
Line 288 ⟶ 1,041:
 
which serve without any errors.
 
=={{header|Io}}==
 
<syntaxhighlight lang="io">
WebRequest := Object clone do(
handleSocket := method(aSocket,
aSocket streamWrite("Goodbye, World!")
aSocket close
)
)
 
WebServer := Server clone do(
setPort(8080)
handleSocket := method(aSocket,
WebRequest clone asyncSend(handleSocket(aSocket))
)
)
 
WebServer start
</syntaxhighlight>
 
=={{header|J}}==
If the desire is to use the browser as a gui, the easiest thing to do would be to [http://www.jsoftware.com/stable.htm download] [http://www.jsoftware.com/docs/help701/user/relhigh.htm j7], edit the jhs script to start on port 8080, start jhs, visit http://127.0.0.1:8080/jijx then enter the text:
would be to [http://www.jsoftware.com/stable.htm download] [http://www.jsoftware.com/docs/help701/user/relhigh.htm j7], edit the jhs script to start on port 8080,
<lang j>'Goodbye, World!'</lang>
start jhs, visit http://127.0.0.1:8080/jijx then enter the text:
This will compute the desired result and display it (actually, it will be displayed twice since the original string will also be displayed). This would be even simpler if you could just use the default jhs port (65001)... Alternatively, a jhs form could be used (but this would not have the exact url structure specified).
<syntaxhighlight lang="j">'Goodbye, World!'</syntaxhighlight>
This will compute the desired result and display it (actually, it will be displayed twice since the original string will also be displayed).
This would be even simpler if you could just use the default jhs port (65001)...
Alternatively, a jhs form could be used (but this would not have the exact url structure specified).
 
However, if the desire is to implement the task exactly, any of approaches at [[j:JWebServer]] might be used.
any of approaches at [[j:JWebServer]] might be used.
 
For example, here is a web server which ignores the client's request and always returns Goodbye, World:
and always returns Goodbye, World:
<lang j>hello=: verb define
<syntaxhighlight lang="j">hello=: verb define
8080 hello y NB. try to use port 8080 by default
:
Line 323 ⟶ 1,102:
responseFor=: dyad define
'HTTP/1.0 200 OK',CRLF,'Content-Type: text/plain',CRLF,CRLF,'Goodbye, World!',CRLF
)</langsyntaxhighlight>
To deploy this server, once it has been defined, run
<syntaxhighlight lang ="j">hello''</langsyntaxhighlight>
This version works because reasonable http requests fit in a single tcp packet.
This version works because reasonable http requests fit in a single tcp packet. (And note that the server waits for one tcp packet before responding.) If parsing of the request is desired, one of the more complicated implementations at [[j:JWebServer]] should be used instead (but that's not really relevant for this task, except perhaps to require complete headers before responding, with broken browsers which send multiple tcp packets for the request).
(And note that the server waits for one tcp packet before responding.)
If parsing of the request is desired, one of the more complicated implementations at [[j:JWebServer]] should be used instead (but that's not really relevant for this task, except perhaps to require complete headers before responding, with broken browsers which send multiple tcp packets for the request).
 
=={{header|Java}}==
Multiple requests will be served in the order that they reach the server, with a queue size limit of 50 waiting requests imposed by default in the <code>ServerSocket</code> class (may be changed by adding a second positive integer argument to the <code>ServerSocket</code> constructor).
with a queue size limit of 50 waiting requests imposed by default in the <code>ServerSocket</code> class (may be changed by adding a second positive integer argument to the <code>ServerSocket</code> constructor).
<lang java>import java.io.IOException;
<syntaxhighlight lang="java">import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
Line 336 ⟶ 1,118:
 
public class HelloWorld{
public static void main(String[] args) throws IOException{
ServerSocket listener = new ServerSocket(8080);
while(true){
Socket sock = listener.accept();
new PrintWriter(sock.getOutputStream(), true).
println("Goodbye, World!");
sock.close();
}
}
}
}</langsyntaxhighlight>
 
=={{header|JavaScript}}==
 
{{works with|Node.js}}
Using [http://nodejs.org node.js]:
 
<langsyntaxhighlight lang="javascript">var http = require('http');
 
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Goodbye, World!\n');
}).listen(8080, '127.0.0.1');</langsyntaxhighlight>
 
It scales:
Line 370 ⟶ 1,152:
 
with no errors.
 
=={{header|Jsish}}==
One wrinkle in this sample use of the Jsi_Websrv module that ships with Jsi. A request needs ''page'' and not just the port.
 
{{out}}
<pre>prompt$ jsish
# require('Jsi_Websrv');
1.01
# Jsi_Websrv('', {server:true, port:8080, pageStr:'Goodbye, World!'});
 
...other terminal...
 
prompt$ curl http://localhost:8080/page
Goodbye, World!prompt$ curl http://localhost:8080/page
Goodbye, World!</pre>
 
=={{header|Julia}}==
Requires the HttpServer package to have previously been installed with 'Pkg.add("HttpServer")'
<syntaxhighlight lang="julia">using HttpServer
server = Server() do req, res
"Goodbye, World!"
end
run(server, 8080)
</syntaxhighlight>
 
=={{header|Kotlin}}==
{{trans|Java}}
<syntaxhighlight lang="scala">import java.io.PrintWriter
import java.net.ServerSocket
 
fun main(args: Array<String>) {
val listener = ServerSocket(8080)
while(true) {
val sock = listener.accept()
PrintWriter(sock.outputStream, true).println("Goodbye, World!")
sock.close()
}
}</syntaxhighlight>
 
=={{header|Lasso}}==
While Lasso has a built-in webserver you can use,
here's how you can create a basic multi-threaded webserver
of your own to complete this request:
<syntaxhighlight lang="lasso">local(server) = net_tcp
handle => { #server->close }
#server->bind(8080) & listen & forEachAccept => {
local(con) = #1
 
split_thread => {
handle => { #con->close }
local(request) = ''
// Read in the request in chunks until you have it all
{
#request->append(#con->readSomeBytes(8096))
not #request->contains('\r\n\r\n')? currentCapture->restart
}()
 
local(response) = 'HTTP/1.1 200 OK\r\n\
Content-Type: text/html; charset=UTF-8\r\n\r\n\
Goodbye, World!'
#con->writeBytes(bytes(#response))
}
}</syntaxhighlight>
 
=={{header|Liberty BASIC}}==
This is difficult, although possible, in Liberty BASIC, but it's close relative Run BASIC is designed for serving webpages easily. The task becomes simply ..
but it's close relative ''Run BASIC'' is designed for serving webpages easily.
<lang lb>print "hello world!" </lang>
The task becomes simply ..
<syntaxhighlight lang="lb">print "hello world!" </syntaxhighlight>
 
=={{header|Lua}}==
{{works with|lua|5.2.4}}
{{libheader|LuaSocket}}
<syntaxhighlight lang="lua">local socket = require "socket"
local headers = "HTTP/1.1 200 OK\r\nContent-Type: text/html; charset=UTF-8\r\nContent-Length: %d\r\n\r\n%s"
local content = "<!doctype html><html><title>Goodbye, World!</title><h1>Goodbye, World!"
local server = assert(socket.bind("localhost", 8080))
repeat
local client = server:accept()
local ok = client:send(string.format(headers, #content, content))
client:close()
until not client or not ok
server:close()</syntaxhighlight>
 
=={{header|Mathematica}}/{{header|Wolfram Language}}==
<syntaxhighlight lang="mathematica">listener =
SocketListen["127.0.0.1:8080",
Function[{assoc},
With[{client = assoc["SourceSocket"]},
WriteString[client,
"HTTP/1.0 200 OK\nContent-Length: 16\n\nGoodbye, World!\n"];
Close[client]]]]
SystemOpen["http://127.0.0.1:8080"]</syntaxhighlight>
Clean up:
<syntaxhighlight lang="mathematica">DeleteObject[listener];
Close[listener["Socket"]]</syntaxhighlight>
 
=={{header|min}}==
{{works with|min|0.37.0}}
<syntaxhighlight lang="min">{
(
{
{"text/plain; charset=utf-8" :content-type} :headers
"Goodbye, World!" :body
}
) :handler
8080 :port
} start-server</syntaxhighlight>
 
=={{header|Modula-2}}==
This is a CGI executable:
<syntaxhighlight lang="text">
MODULE access;
 
FROM InOut IMPORT WriteString, WriteLn;
 
BEGIN
WriteString ("Content-Type : text/plain");
WriteLn;
WriteLn;
WriteString ("Hello web wide world.");
WriteLn
END access.
</syntaxhighlight>
 
=={{header|NetRexx}}==
{{Trans|Java}}
<syntaxhighlight lang="netrexx">/* NetRexx */
options replace format comments java crossref symbols binary
 
class RHelloWorldWebServer public
 
properties public constant
isTrue = boolean (1 == 1)
isFalse = boolean (1 \== 1)
greeting1 = "Goodbye, World!"
greeting2 = '' -
|| 'HTTP/1.1 200 OK\r\n' -
|| 'Content-Type: text/html; charset=UTF-8\r\n\r\n' -
|| '<?xml version="1.0" encoding="UTF-8"?>\r\n' -
|| '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">\r\n' -
|| '<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">\r\n' -
|| '<header>\r\n' -
|| '<title>Hello</title>\r\n' -
|| '<style type="text/css">body {font-family: sans-serif;}</style>\r\n' -
|| '</header>\r\n' -
|| '<body>\r\n' -
|| '<h2 style="text-align: center;">' || greeting1 || '</h2>\r\n' -
|| '</body>\r\n' -
|| '</html>\r\n' -
|| ''
 
properties static inheritable
terminate = isFalse -- TODO: provide a less draconian means to terminate the listener loop
 
method main(args = String[]) public static signals IOException
listener = ServerSocket(8080)
loop label listener forever
if terminate then leave listener
sock = listener.accept()
PrintWriter(sock.getOutputStream(), isTrue).println(greeting2)
sock.close()
end listener
return
</syntaxhighlight>
 
=={{header|Nim}}==
<syntaxhighlight lang="nim">import asynchttpserver, asyncdispatch
 
proc cb(req: Request) {.async.} =
await req.respond(Http200, "Hello, World!")
 
asyncCheck newAsyncHttpServer().serve(Port(8080), cb)
runForever()
</syntaxhighlight>
 
=={{header|Objeck}}==
<langsyntaxhighlight lang="objeck">
use Net;
use Concurrency;
Line 395 ⟶ 1,348:
}
}
</syntaxhighlight>
</lang>
 
=={{header|OCaml}}==
This code is derived from this [http://ocamlunix.forge.ocamlcore.org/sockets.html#htoc54 ocaml-unix documentation].
<langsyntaxhighlight lang="ocaml">let try_finalise f x finally y =
let res = try f x with e -> finally y; raise e in
finally y;
Line 455 ⟶ 1,408:
 
let _ =
Unix.handle_unix_error server ()</langsyntaxhighlight>
 
=={{header|Ol}}==
This sample sends 200 OK on any request and echoes the request headers.
<syntaxhighlight lang="ol">(import (lib http))
 
(http:run 8080 (lambda (fd request headers send close)
(send "HTTP/1.0 200 OK\n"
"Connection: close\n"
"Content-Type: text/html; charset=UTF-8\n"
"Server: " (car *version*) "/" (cdr *version*)
"\n\n"
 
"<h1>Goodbye, World!</h1>"
(ref request 1) ": " (ref request 2)
"<hr><small>" headers "</small>")
(close #t)
))
</syntaxhighlight>
 
=={{header|Opa}}==
From [http://doc.opalang.org/index.html#_a_first_peek_at_opa Opa documentation]:
<langsyntaxhighlight lang="ocaml">server = one_page_server("Hello", -> <>Goodbye, world</>)</langsyntaxhighlight>
Compile and run:
<syntaxhighlight lang ="bash">opa file.opa --</langsyntaxhighlight>
 
=={{header|Panda}}==
Using the command line client. Listen to port 8080. For each request a request object is returned, we ignore this and just use it to send message which will be the response.
 
<syntaxhighlight lang="panda">8080.port.listen.say("Hello world!")</syntaxhighlight>
 
=={{header|Perl}}==
<langsyntaxhighlight Perllang="perl">use Socket;
 
my $port = 8080;
Line 488 ⟶ 1,464:
"<html><head><title>Goodbye, world!</title></head><body>Goodbye, world!</body></html>\r\n";
close CLIENT;
}</langsyntaxhighlight>
Various modules exist for using sockets, including the popular IO::Socket which provides a simpler and more friendly OO interface for the socket layer. Here is the solution using this module:
which provides a simpler and more friendly OO interface for the socket layer.
Here is the solution using this module:
{{libheader|IO::Socket::INET}}
<langsyntaxhighlight Perllang="perl">use IO::Socket::INET;
 
my $sock = new IO::Socket::INET ( LocalHostLocalAddr => "127.0.0.1:8080",
LocalPort => "8080",
Proto => "tcp",
Listen => 1,
Reuse => 1, ) or die "Could not create socket: $!";
Line 504 ⟶ 1,480:
"<html><head><title>Goodbye, world!</title></head><body>Goodbye, world!</body></html>\r\n";
close $client;
}</langsyntaxhighlight>
Using Perl's glue power, provide a suicide note with visitor counter via netcat:
<lang Perl>while (++(our $vn)) {
open NC, "|-", qw(nc -l -p 8080 -q 1);
print NC "HTTP/1.0 200 OK\xd\xa",
"Content-type: text/plain; charset=utf-8\xd\xa\xd\xa",
"Goodbye, World! (hello, visitor No. $vn!)\xd\xa";
}</lang>
 
Using Perl's glue power, provide a note
=={{header|Perl 6}}==
with visitor counter via netcat:
{{works with|Rakudo}}
<syntaxhighlight lang="perl">while (++(our $vn)) {
<lang perl6>my $sock = IO::Socket::INET.new(:localhost('0.0.0.0'), :localport(8080), :listen);
open NC, "|-", qw(nc -l -p 8080 -q 1);
say "Goodbye Web Server listening on $sock.localhost():$sock.localport()";
print NC "HTTP/1.0 200 OK\xd\xa",
while $sock.accept -> $client {
$client.send: "HTTP/1.0 200 OK\r\nContentContent-Typetype: text/plain; charset=UTFutf-8\rx0d\nx0a\rx0d\nGoodbyex0a", World!\r\n";
"Goodbye, World! (hello, visitor No. $vn!)\x0d\x0a";
$client.close;
}</langsyntaxhighlight>
 
Here's another solution using Plack (may be found on CPAN):
=={{header|PicoLisp}}==
<syntaxhighlight lang="perl">use Plack::Runner;
Contents of the file "goodbye.l":
my $app = sub {
<lang PicoLisp>(html 0 "Bye" NIL NIL
return [ 200,
"Goodbye, World!" )</lang>
[ 'Content-Type' => 'text/html; charset=UTF-8' ],
Start server:
[ '<html><head><title>Goodbye, world!</title></head><body>Goodbye, world!</body></html>' ]
<pre>$ pil @lib/http.l @lib/xhtml.l -'server 8080 "goodbye.l"' -wait</pre>
]
};
my $runner = Plack::Runner->new;
$runner->parse_options('--host' => 'localhost', '--port' => 8080);
$runner->run($app);</syntaxhighlight>
 
When using plackup, then this may be compressed to one line:
=={{header|PureBasic}}==
<syntaxhighlight lang="perl">my $app = sub { return [ 200, [ 'Content-Type' => 'text/html; charset=UTF-8' ], [ '<html><head><title>Goodbye, world!</title></head><body>Goodbye, world!</body></html>' ] ] };</syntaxhighlight>
<lang PureBasic>If InitNetwork() = 0
Use <syntaxhighlight lang="shell">plackup --host localhost --port 8080 script.psgi</syntaxhighlight> to start the webserver.
MessageRequester("Error", "Can't initialize the network !")
End
EndIf
 
=={{header|Phix}}==
Port = 8080
Windows only for now (should be relatively straightforward to get it working on linux)<br>
Output as C, code is however a translation of a FASM example.
<!--<syntaxhighlight lang="phix">(notonline)-->
<span style="color: #000080;font-style:italic;">-- demo\rosetta\SimpleHttpServer.exw</span>
<span style="color: #008080;">without</span> <span style="color: #008080;">js</span>
<span style="color: #008080;">include</span> <span style="color: #000000;">builtins</span><span style="color: #0000FF;">\</span><span style="color: #000000;">sockets</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">MAX_QUEUE</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">100</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">ESCAPE</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">#1B</span><span style="color: #0000FF;">,</span>
<span style="color: #000000;">response</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">substitute</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"""
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
&lt;title&gt;Bye-bye baby bye-bye&lt;/title&gt;
&lt;style&gt;
body { background-color: #111 }
h1 { font-size:4cm; text-align: center; color: black;
text-shadow: 0 0 2mm red}
&lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;h1&gt;Goodbye, world!&lt;/h1&gt;
&lt;/body&gt;
&lt;/html&gt;
"""</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\n"</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"\r\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">puts</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"server started, open http://localhost:8080/ in browser or curl, press Esc or Q to quit\n"</span><span style="color: #0000FF;">)</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">sock</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">socket</span><span style="color: #0000FF;">(</span><span style="color: #000000;">AF_INET</span><span style="color: #0000FF;">,</span><span style="color: #000000;">SOCK_STREAM</span><span style="color: #0000FF;">,</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">),</span>
<span style="color: #000000;">pSockAddr</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">sockaddr_in</span><span style="color: #0000FF;">(</span><span style="color: #000000;">AF_INET</span><span style="color: #0000FF;">,</span> <span style="color: #008000;">""</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">8080</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">bind</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sock</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">pSockAddr</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">SOCKET_ERROR</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">crash</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"bind (%v)"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">get_socket_error</span><span style="color: #0000FF;">()})</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">listen</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sock</span><span style="color: #0000FF;">,</span><span style="color: #000000;">MAX_QUEUE</span><span style="color: #0000FF;">)=</span><span style="color: #000000;">SOCKET_ERROR</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">crash</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"listen (%v)"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">get_socket_error</span><span style="color: #0000FF;">()})</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">while</span> <span style="color: #008080;">not</span> <span style="color: #7060A8;">find</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">get_key</span><span style="color: #0000FF;">(),{</span><span style="color: #000000;">ESCAPE</span><span style="color: #0000FF;">,</span><span style="color: #008000;">'q'</span><span style="color: #0000FF;">,</span><span style="color: #008000;">'Q'</span><span style="color: #0000FF;">})</span> <span style="color: #008080;">do</span>
<span style="color: #0000FF;">{</span><span style="color: #004080;">integer</span> <span style="color: #000000;">code</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">select</span><span style="color: #0000FF;">({</span><span style="color: #000000;">sock</span><span style="color: #0000FF;">},{},{},</span><span style="color: #000000;">250000</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (0.25s)</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">code</span><span style="color: #0000FF;">=</span><span style="color: #000000;">SOCKET_ERROR</span> <span style="color: #008080;">then</span> <span style="color: #7060A8;">crash</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"select (%v)"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">get_socket_error</span><span style="color: #0000FF;">()})</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">if</span> <span style="color: #000000;">code</span><span style="color: #0000FF;">></span><span style="color: #000000;">0</span> <span style="color: #008080;">then</span> <span style="color: #000080;font-style:italic;">-- (not timeout)</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">peer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">accept</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sock</span><span style="color: #0000FF;">),</span>
<span style="color: #000000;">ip</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">getsockaddr</span><span style="color: #0000FF;">(</span><span style="color: #000000;">peer</span><span style="color: #0000FF;">)</span>
<span style="color: #0000FF;">{</span><span style="color: #004080;">integer</span> <span style="color: #000000;">len</span><span style="color: #0000FF;">,</span> <span style="color: #004080;">string</span> <span style="color: #000000;">request</span><span style="color: #0000FF;">}</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">recv</span><span style="color: #0000FF;">(</span><span style="color: #000000;">peer</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"Client IP: %s\n%s\n"</span><span style="color: #0000FF;">,{</span><span style="color: #7060A8;">ip_to_string</span><span style="color: #0000FF;">(</span><span style="color: #000000;">ip</span><span style="color: #0000FF;">),</span><span style="color: #000000;">request</span><span style="color: #0000FF;">})</span>
<span style="color: #008080;">if</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">request</span><span style="color: #0000FF;">)></span><span style="color: #000000;">3</span> <span style="color: #008080;">and</span> <span style="color: #000000;">request</span><span style="color: #0000FF;">[</span><span style="color: #000000;">1</span><span style="color: #0000FF;">..</span><span style="color: #000000;">4</span><span style="color: #0000FF;">]=</span><span style="color: #008000;">"GET "</span> <span style="color: #008080;">then</span>
<span style="color: #004080;">integer</span> <span style="color: #000000;">bytes_sent</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">send</span><span style="color: #0000FF;">(</span><span style="color: #000000;">peer</span><span style="color: #0000FF;">,</span><span style="color: #000000;">response</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"%d bytes successfully sent\n"</span><span style="color: #0000FF;">,</span><span style="color: #000000;">bytes_sent</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #7060A8;">shutdown</span><span style="color: #0000FF;">(</span><span style="color: #000000;">peer</span><span style="color: #0000FF;">,</span> <span style="color: #000000;">SD_SEND</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- tell curl it's over</span>
<span style="color: #000000;">peer</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">closesocket</span><span style="color: #0000FF;">(</span><span style="color: #000000;">peer</span><span style="color: #0000FF;">)</span> <span style="color: #000080;font-style:italic;">-- (as does this)</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
<span style="color: #000000;">sock</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">closesocket</span><span style="color: #0000FF;">(</span><span style="color: #000000;">sock</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">WSACleanup</span><span style="color: #0000FF;">()</span>
<!--</syntaxhighlight>-->
{{Out}}
Server console, once you have opened http://localhost:8080 in your browser, or run curl http://localhost:8080
<pre>
server started, open http://localhost:8080/ in browser or curl, press Esc or Q to quit
Client IP: 127.0.0.1
GET / HTTP/1.1
Host: localhost:8080
User-Agent: curl/7.55.1
Accept: */*
 
352 bytes successfully sent
If CreateNetworkServer(0, Port)
</pre>
Repeat
Delay(1)
SEvent = NetworkServerEvent()
If SEvent
ClientID = EventClient()
Select SEvent
Case #PB_NetworkEvent_Data
SendNetworkData(ClientID,@"Goodbye, World!",Len("Goodbye, World!"))
CloseNetworkConnection(ClientID)
EndSelect
EndIf
ForEver
Else
MessageRequester("Error", "Can't create the server (port in use ?).")
EndIf</lang>
 
=={{header|PHP}}==
<langsyntaxhighlight PHPlang="php"><?php
// AF_INET6 for IPv6 // IP
$socket = socket_create(AF_INET, SOCK_STREAM, 0) or die('Failed to create socket!');
Line 573 ⟶ 1,593:
}
else usleep(100000); // limits CPU usage by sleeping after doing every request
}
}</lang>
?></syntaxhighlight>
 
=={{header|PicoLisp}}==
Contents of the file "goodbye.l":
<syntaxhighlight lang="picolisp">(html 0 "Bye" NIL NIL
"Goodbye, World!" )</syntaxhighlight>
Start server:
<pre>$ pil @lib/http.l @lib/xhtml.l -'server 8080 "goodbye.l"' -wait</pre>
 
=={{header|Pike}}==
 
<syntaxhighlight lang="pike">
void handle_request(Protocols.HTTP.Server.Request request)
{
request->response_and_finish( ([ "data":"Goodbye, World!",
"type":"text/html" ]) );
}
 
int main()
{
Protocols.HTTP.Server.Port(handle_request, 8080);
return -1; // -1 is a special case that retirns control to the backend
}
</syntaxhighlight>
 
=={{header|Pony}}==
Using only in-built TCP listeners, not the HTTP server package
<syntaxhighlight lang="pony">
use "net"
 
actor Main
new create(env: Env) =>
try TCPListener(env.root as AmbientAuth,
Listener,
"127.0.0.1", "8080")
else env.err.print("unable to use the network")
end
 
// Boilerplate code, create a TCP listener on a socket
class Listener is TCPListenNotify
 
new iso create() => None
 
fun ref listening(_: TCPListener ref) => None
 
fun ref not_listening(listen: TCPListener ref) => listen.close()
 
fun ref connected(listen: TCPListener ref): TCPConnectionNotify iso^ =>
Server
 
 
// HTTP server that handles the TCP connections
class val Server is TCPConnectionNotify
 
// Empty ctor
new iso create() => None
 
// Impl for when server accepts the client request
fun accepted(_: TCPConnection ref) => None
 
// Impl for when server receives client data
fun ref received(conn: TCPConnection ref, _: Array[U8] iso, _: USize)
: Bool
=>
// handle request
conn.write("HTTP/1.1 200 OK\r\n\r\n")
conn.write("<html><body><p>")
conn.write("Goodbye, World!")
conn.write("</p></body></html>")
conn.dispose()
false
 
// Impl for when client closes the connection
fun ref closed(conn: TCPConnection ref) => conn.dispose()
 
// Impl for when client fails to connect to all possible addresses for the server
fun ref connect_failed(_: TCPConnection ref) => None
</syntaxhighlight>
 
=={{header|Prolog}}==
{{works with|SWI Prolog}}
{{works with|YAP}}
 
<syntaxhighlight lang="prolog">% The following modules are used in the main module to start a server.
:- use_module(library(http/thread_httpd)).
:- use_module(library(http/http_dispatch)).
 
% The following module is used in every module that describes a page.
:- use_module(library(http/html_write)).
 
% Main entry point: starts the server on port 8080.
server :- http_server(http_dispatch, [port(8080)]).
 
% Defines the handler for the root URI /.
:- http_handler('/', say_goodbye, []).
 
% Defines the actual page content.
% In this case we're returning a page with the title "Howdy" and the content,
% wrapped in <h1></h1> tags, "Goodbye, World!".
say_goodbye(_Request) :- reply_html_page([title('Howdy')],
[h1('Goodbye, World!')]).</syntaxhighlight>
 
=={{header|PureBasic}}==
<syntaxhighlight lang="purebasic">If InitNetwork() = 0
MessageRequester("Error", "Can't initialize the network !")
End
EndIf
 
Port = 8080
 
If CreateNetworkServer(0, Port)
Repeat
Delay(1)
SEvent = NetworkServerEvent()
If SEvent
ClientID = EventClient()
Select SEvent
Case #PB_NetworkEvent_Data
SendNetworkData(ClientID,@"Goodbye, World!",Len("Goodbye, World!"))
CloseNetworkConnection(ClientID)
EndSelect
EndIf
ForEver
Else
MessageRequester("Error", "Can't create the server (port in use ?).")
EndIf</syntaxhighlight>
 
=={{header|Python}}==
Using the <code>wsgiref.simple_server</code> module (Python < 3.2).
<lang Python>def app(environ, start_response):
 
start_response('200 OK', [])
<syntaxhighlight lang="python">from wsgiref.simple_server import make_server
yield "Goodbye, World!"
 
def app(environ, start_response):
start_response('200 OK', [('Content-Type','text/html')])
yield b"<h1>Goodbye, World!</h1>"
 
server = make_server('127.0.0.1', 8080, app)
server.serve_forever()</syntaxhighlight>
 
Using the <code>http.server</code> module (Python 3).
 
<syntaxhighlight lang="python">import threading
 
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
 
 
class HelloHTTPRequestHandler(BaseHTTPRequestHandler):
 
message = 'Hello World! 今日は'
 
def do_GET(self):
self.send_response(200)
self.send_header('Content-type', 'text/html; charset=UTF-8')
self.end_headers()
self.wfile.write(self.message.encode('utf-8'))
self.close_connection = True
 
 
def serve(addr, port):
with ThreadingHTTPServer((addr, port), HelloHTTPRequestHandler) as server:
server.serve_forever(poll_interval=None)
 
 
if __name__ == '__main__':
 
from wsgiref.simple_server import make_server
addr, serverport = make_server('127.0.0.1localhost', 8080, app80)
 
server.serve_forever()</lang>
threading.Thread(target=serve, args=(addr, port), daemon=True).start()
 
try:
while True:
# handle Ctrl+C
input()
 
except KeyboardInterrupt:
pass
</syntaxhighlight>
 
=={{header|R}}==
<syntaxhighlight lang="rsplus">
library(httpuv)
 
runServer("0.0.0.0", 5000,
list(
call = function(req) {
list(status = 200L, headers = list('Content-Type' = 'text/html'), body = "Hello world!")
}
)
)
 
 
</syntaxhighlight>
 
=={{header|Racket}}==
 
<syntaxhighlight lang="racket">
#lang racket
(require web-server/servlet web-server/servlet-env)
(define (start req) (response/xexpr "Goodbye, World!"))
(serve/servlet start #:port 8080 #:servlet-path "/")
</syntaxhighlight>
 
=={{header|Raku}}==
(formerly Perl 6)
{{works with|Rakudo}}
<syntaxhighlight lang="raku" line>my $listen = IO::Socket::INET.new(:listen, :localhost<localhost>, :localport(8080));
loop {
my $conn = $listen.accept;
my $req = $conn.get ;
$conn.print: "HTTP/1.0 200 OK\r\nContent-Type: text/plain; charset=UTF-8\r\n\r\nGoodbye, World!\r\n";
$conn.close;
}</syntaxhighlight>
Async:
<syntaxhighlight lang="raku" line>react {
whenever IO::Socket::Async.listen('0.0.0.0', 8080) -> $conn {
whenever $conn.Supply.lines -> $line {
$conn.print: "HTTP/1.0 200 OK\r\nContent-Type: text/plain; charset=UTF-8\r\n\r\nGoodbye, World!\r\n";
$conn.close;
}
}
}</syntaxhighlight>
 
=={{header|REALbasic}}==
 
<syntaxhighlight lang="vb">
Class HTTPSock
Inherits TCPSocket
Event Sub DataAvailable()
Dim headers As New InternetHeaders
headers.AppendHeader("Content-Length", Str(LenB("Goodbye, World!")))
headers.AppendHeader("Content-Type", "text/plain")
headers.AppendHeader("Content-Encoding", "identity")
headers.AppendHeader("Connection", "close")
Dim data As String = "HTTP/1.1 200 OK" + EndOfLine.Windows + headers.Source + EndOfLine.Windows + EndOfLine.Windows + "Goodbye, World!"
Me.Write(data)
Me.Close
End Sub
End Class
 
Class HTTPServ
Inherits ServerSocket
Event Sub AddSocket() As TCPSocket
Return New HTTPSock
End Sub
End Class
 
Class App
Inherits Application
Event Sub Run(Args() As String)
Dim sock As New HTTPServ
sock.Port = 8080
sock.Listen()
While True
App.DoEvents
Wend
End Sub
End Class
</syntaxhighlight>
 
=={{header|REXX}}==
Based on the UNIX Shell entry. Works with Regina, tested on GNU/Linux. Requires netcat as nc.
 
<syntaxhighlight lang="rexx">/* HTTP hello server */
response.1 = 'HTTP/1.1 200 OK' || '0D0A'X,
|| 'Connection: close' || '0D0A'X,
|| 'Content-Type: text/html' || '0D0A0D0A'X
response.2 = '<!DOCTYPE html>' || '0A'X,
|| '<html><head><title>Hello, Rosetta</title></head>' || '0A'X,
|| '<body><h2>Goodbye, World!</h2></body>' || '0A'X,
|| '<!-- Shout out from the Rosetta Code programming chrestomathy --></html>' || '0A'X
 
DO FOREVER
ADDRESS SYSTEM 'nc -l 8080' WITH INPUT STEM response.
END</syntaxhighlight>
 
=={{header|Ring}}==
<syntaxhighlight lang="ring">
Load "guilib.ring"
 
cResponse = "HTTP/1.1 200 OK\r\n" +
"Content-Type: text/html\r\n\r\n" +
"<html><head><title>Goodbye, world!</title></head>" +
"<body>Goodbye, world!</body></html>"
 
cResponse = substr(cResponse,"\r\n",char(13)+char(10))
 
new qApp {
oServer = new Server { Server() }
exec()
}
 
Class Server
 
win1 lineedit1
oTcpServer oTcpClient
cOutput = ""
 
func server
 
win1 = new qwidget()
 
lineedit1 = new qtextedit(win1) {
setGeometry(150,50,200,300)
}
 
win1 {
setwindowtitle("Server")
setgeometry(450,100,400,400)
show()
}
 
oTcpServer = new qTcpServer(win1) {
setNewConnectionEvent("oServer.pNewConnection()")
oHostAddress = new qHostAddress()
oHostAddress.SetAddress("127.0.0.1")
listen(oHostAddress,8080)
}
cOutput = "Server Started" + nl +
"listen to port 8080" + nl
 
lineedit1.settext(cOutput)
 
Func pNewConnection
 
oTcpClient = oTcpServer.nextPendingConnection()
while not oTcpClient.waitForReadyRead(100) end
cOutput += "Accept Connection" + nl
lineedit1.settext(cOutput)
oTcpClient {
write(cResponse,len(cResponse))
flush()
waitforbyteswritten(300000)
close()
}
</syntaxhighlight>
 
=={{header|Ruby}}==
Using the WEBrick module from Ruby's standard library.
<langsyntaxhighlight lang="ruby">require 'webrick'
server = WEBrick::HTTPServer.new(:Port => 8080)
server.mount_proc('/') {|request, response| response.body = "Goodbye, World!"}
trap("INT") {server.shutdown}
server.start</langsyntaxhighlight>
 
Same code without <code>trap</code>, in a single statement using <code>tap</code>.
<syntaxhighlight lang="ruby">require 'webrick'
WEBrick::HTTPServer.new(:Port => 80).tap {|srv|
srv.mount_proc('/') {|request, response| response.body = "Goodbye, World!"}
}.start</syntaxhighlight>
 
Using the [http://www.sinatrarb.com/ sinatra] gem:
<langsyntaxhighlight lang="ruby">require 'sinatra'
get("/") { "Goodbye, World!" }</langsyntaxhighlight>
 
=={{header|Run BASIC}}==
<langsyntaxhighlight lang="runbasic">html "Hello World!"</langsyntaxhighlight>
 
=={{header|Rust}}==
Basically no error handling. This web server will simply panic if there is any sort of error.
<syntaxhighlight lang="rust">use std::net::{Shutdown, TcpListener};
use std::thread;
use std::io::Write;
 
const RESPONSE: &'static [u8] = b"HTTP/1.1 200 OK\r
Content-Type: text/html; charset=UTF-8\r\n\r
<!DOCTYPE html><html><head><title>Bye-bye baby bye-bye</title>
<style>body { background-color: #111 }
h1 { font-size:4cm; text-align: center; color: black;
text-shadow: 0 0 2mm red}</style></head>
<body><h1>Goodbye, world!</h1></body></html>\r";
 
 
fn main() {
let listener = TcpListener::bind("127.0.0.1:8080").unwrap();
 
for stream in listener.incoming() {
thread::spawn(move || {
let mut stream = stream.unwrap();
match stream.write(RESPONSE) {
Ok(_) => println!("Response sent!"),
Err(e) => println!("Failed sending response: {}!", e),
}
stream.shutdown(Shutdown::Write).unwrap();
});
}
}
</syntaxhighlight>
 
=={{header|Rye}}==
<syntaxhighlight lang="clojure">rye .needs { http }
 
new-server ":8080"
|handle "/" fn { r w } { write w "Goodbye, World!" }
|serve</syntaxhighlight>
 
=={{header|Salmon}}==
<langsyntaxhighlight Salmonlang="salmon">use "http.salm" : "http.si";
 
/* Don't do any logging. */
Line 606 ⟶ 1,996:
 
simple_http_server(8080, procedure(header, connection)
{ respond_text(connection, "Goodbye, World!"); });</langsyntaxhighlight>
 
=={{header|Scala}}==
{{libheader|Scala}}
{{Trans|Java}}It shows that Scala can simply embed XML fragments.
<syntaxhighlight lang="scala">import java.io.PrintWriter
import java.net.ServerSocket
 
object HelloWorld extends App {
 
val text =
<HTML>
<HEAD>
<TITLE>Hello world </TITLE>
</HEAD>
<BODY LANG="en-US" BGCOLOR="#e6e6ff" DIR="LTR">
<P ALIGN="CENTER"> <FONT FACE="Arial, sans-serif" SIZE="6">Goodbye, World!</FONT> </P>
</BODY>
</HTML>
val port = 8080
val listener = new ServerSocket(port)
printf("Listening at port %1$d", port)
 
while (true) {
val sock = listener.accept()
new PrintWriter(sock.getOutputStream(), true).println(text)
sock.close()
}
}</syntaxhighlight>
 
=={{header|Seed7}}==
The code below was inspired by the example code for the function [http://seed7.sourceforge.net/libraries/listener.htm#openInetListener%28in_integer%29 openInetListener].
 
<syntaxhighlight lang="seed7">$ include "seed7_05.s7i";
include "listener.s7i";
 
const proc: main is func
local
var listener: aListener is listener.value;
var file: sock is STD_NULL;
begin
aListener := openInetListener(8080);
listen(aListener, 10);
while TRUE do
sock := accept(aListener);
write(sock, "HTTP/1.1 200 OK\r\n\
\Content-Type: text/html; charset=UTF-8\r\n\
\\r\n\
\<html><body>Hello, world!</body></html>\n");
close(sock);
end while;
end func;</syntaxhighlight>
 
=={{header|Sidef}}==
 
Using the low-level ''Socket'' object:
<syntaxhighlight lang="ruby">var port = 8080;
var protocol = Socket.getprotobyname("tcp");
 
var sock = (Socket.open(Socket.PF_INET, Socket.SOCK_STREAM, protocol) || die "couldn't open a socket: #{$!}");
# PF_INET to indicate that this socket will connect to the internet domain
# SOCK_STREAM indicates a TCP stream, SOCK_DGRAM would indicate UDP communication
 
sock.setsockopt(Socket.SOL_SOCKET, Socket.SO_REUSEADDR, 1) || die "couldn't set socket options: #{$!}";
# SOL_SOCKET to indicate that we are setting an option on the socket instead of the protocol
# mark the socket reusable
 
sock.bind(Socket.sockaddr_in(port, Socket.INADDR_ANY)) || die "couldn't bind socket to port #{port}: #{$!}";
# bind our socket to $port, allowing any IP to connect
 
sock.listen(Socket.SOMAXCONN) || die "couldn't listen to port #{port}: #{$!}";
# start listening for incoming connections
 
while (var client = sock.accept) {
client.print ("HTTP/1.1 200 OK\r\n" +
"Content-Type: text/html; charset=UTF-8\r\n\r\n" +
"<html><head><title>Goodbye, world!</title></head>" +
"<body>Goodbye, world!</body></html>\r\n");
client.close;
}</syntaxhighlight>
 
A more friendly interface, using the ''IO::Socket::INET'' library:
<syntaxhighlight lang="ruby">var inet = require('IO::Socket::INET');
 
var sock = inet.new( LocalAddr => "127.0.0.1:8080",
Listen => 1,
Reuse => 1,
);
 
while (var client = sock.accept) {
client.print ("HTTP/1.1 200 OK\r\n" +
"Content-Type: text/html; charset=UTF-8\r\n\r\n" +
"<html><head><title>Goodbye, world!</title></head>" +
"<body>Goodbye, world!</body></html>\r\n");
client.close;
}</syntaxhighlight>
 
=={{header|Smalltalk}}==
{{works with|Smalltalk/X}}
starting server:
<syntaxhighlight lang="smalltalk">Smalltalk loadPackage:'stx:goodies/webServer'. "usually already loaded"
|myServer service|
 
myServer := HTTPServer startServerOnPort:8082.
service := HTTPPluggableActionService new.
service
register:[:request |
self halt: 'debugging'.
request reply:'<HTML><BODY><H1>Hello World</H1></BODY></HTML>'
]
as:'hello'.
service linkNames:#('/' ).
service registerServiceOn: myServer.
myServer start.</syntaxhighlight>
Be aware that the above is an ad-hoc minimal scripting example.
Normally, a service subclass is used and
response handlers are defined as methods of it (not as action blocks).
Also, services and HTML generation is usually done using a framework
(at least DOM-based, but usually a higher level toolkit).
Especially take a look at smalltalk frameworks like Aida, Seaside, VisualWave etc.
 
===Pharo Smalltalk===
Pharo ships with the Zinc HTTP Component frameworks
that includes a ZnServer class.
Here's the simplest solution to start a web server:
<syntaxhighlight lang="smalltalk">(ZnServer startDefaultOn: 1701)
onRequestRespond: [ :request |
ZnResponse ok: (ZnEntity text: 'Hello World!') ].</syntaxhighlight>
 
To stop the server, use the following:
<syntaxhighlight lang="smalltalk">ZnServer stopDefault.</syntaxhighlight>
 
=={{header|Standard ML}}==
<syntaxhighlight lang="standard ml">
val txt = Word8VectorSlice.full (Byte.stringToBytes "hello world!" ) ;
 
fun serve listener portnr =
let
fun next () =
let
val (conn, conn_addr) = Socket.accept listener
in
case Posix.Process.fork () of
NONE =>
(
Socket.sendVec(conn, txt); Socket.close conn ;
OS.Process.exit OS.Process.success
)
| _ =>
(
Socket.close conn ;next ()
)
end
in (
Socket.Ctl.setREUSEADDR(listener, true);
Socket.bind(listener, INetSock.any portnr );
Socket.listen(listener, 9);
next ()
)
end handle x => (Socket.close listener; raise x)
;
</syntaxhighlight>
call - smlnj interpreter
- serve (INetSock.TCP.socket()) 8080 ;
result - shell
shell$ wget 127.0.0.1:8080
--2020-03-26 16:11:15-- htt p://127.0.0.1:8080/
Connecting to 127.0.0.1:8080... connected.
HTTP request sent, awaiting response... 200 No headers, assuming HTTP/0.9
Length: unspecified
Saving to: 'index.html'
index.html [ <=> ] 12 --.-KB/s in 0s
2020-03-26 16:11:15 (721 KB/s) - 'index.html' saved [12]
shell$ cat index.html
hello world!
 
=={{header|Tcl}}==
===Tcl 8.x===
This version is adapted from [http://wiki.tcl.tk/28412 the Tcler's Wiki].
This version is adapted from [http://wiki.tcl.tk/28414 the Tcler's Wiki].
<lang tcl>proc accept {chan addr port} {
<syntaxhighlight lang="tcl">proc accept {chan addr port} {
while {[gets $chan] ne ""} {}
puts $chan "HTTP/1.1 200 OK\nConnection: close\nContent-Type: text/plain\n"
Line 617 ⟶ 2,182:
}
socket -server accept 8080
vwait forever</langsyntaxhighlight>
 
===Jim Tcl===
{{omit from|GUISS}}
Jim is a small footprint reimplementation of Tcl with modern features.
{{omit from|Locomotive Basic|No sockets}}
<syntaxhighlight lang="tcl">set s [socket stream.server 127.0.0.1:8080]
{{omit from|Lotus 123 Macro Scripting}}
$s readable {
{{omit from|ML/I|No sockets}}
set client [$s accept]
{{omit from|ZX Spectrum Basic|No sockets}}
$client puts "HTTP/1.1 200 OK\nConnection: close\nContent-Type: text/plain\n"
{{omit from|Retro}}
$client puts "Hello, World!\n"
{{omit from|Maxima}}
$client close
}
vwait done</syntaxhighlight>
 
=={{header|UNIX Shell}}==
 
<syntaxhighlight lang="bash">while true; do { echo -e 'HTTP/1.1 200 OK\r\n'; echo 'Hello, World!'; } | nc -l 8080; done</syntaxhighlight>
 
=={{header|Wart}}==
 
<syntaxhighlight lang="python">with server_socket socket :port 4000
accepting client :from socket
making stdout outfile+fd.client
prn "HTTP/1.0 200 OK"
prn "Content-type: text/plain"
prn ""
prn "Hello, world!"</syntaxhighlight>
 
=={{header|Wren}}==
{{libheader|SpiderWren}}
<syntaxhighlight lang="wren">import "web" for Routes, App
 
Routes.GET("/") {
return "Goodbye, World!"
}
 
App.run(8080)</syntaxhighlight>
 
=={{header|X86-64 Assembly}}==
===UASM 2.52===
This SHOULD assemble on both Linux and Windows.
(Tested on Arch, Don't have windows installed atm :[)
<syntaxhighlight lang="asm">
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Crossplatform(?) Web Server example using UASM's OO Language extention
;;
;; Linux Build:
;; $ uasm -elf64 websrv.asm
;; $ gcc -o websrv websrv.o -no-pie
;; With MUSL libc
;; $ musl-gcc -o websrv websrv.o -e main -nostartfiles -no-pie
;;
;; Windows Build:
;; $ uasm64 -win64 websrv.asm
;; $ link /machine:x64 /subsystem:console /release websrv.obj
;; kernel32.lib msvcrt.lib ws2_32.lib
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 
option casemap:none
option literals:on ;; Usually on by default buuuuuut...
 
WIN64 equ 1
LIN64 equ 3
 
 
ifndef __WEBSRV_CLASS__
__WEBSERV_CLASS__ equ 1
 
AF_INET equ 2
SOCK_STREAM equ 1
INADDR_ANY equ 0
 
in_addr struct
s_addr dd ?
in_addr ends
 
sockaddr struct
sa_family dw ?
sa_data db 14 dup (?)
sockaddr ends
 
sockaddr_in struct
sin_family dw ?
sin_port dw ?
sin_addr in_addr <?>
sin_zero db 8 dup (?)
sockaddr_in ends
 
WSADATA struct
wVersion dw ?
wHighVersion dw ?
iMaxSockets dw ?
iMaxUdpDg dw ?
szDescription db 256 dup (?)
szSystemStatus db 128 dup (?)
lpVendorInfo dq ?
WSADATA ends
;; Platform specific requirements etc..
if @Platform eq WIN64
;;include/includelibs can be used here. But this works too.
option dllimport:<kernel32>
ExitProcess proto ucode:dword
HeapAlloc proto fd:qword, flgs:dword, hlen:qword
HeapFree proto fd:qword, flgs:dword, lpmem:qword
GetProcessHeap proto
option dllimport:<msvcrt>
printf proto fmt:qword, args:VARARG
strlen proto buff:qword
option dllimport:<ws2_32>
WSAStartup proto ver:word, wsa:qword
WSACleanup proto wsa:qword
closesocket proto fd:dword
socket proto d:dword, s:dword, prtl:dword
bind proto fd:dword, saddr:qword, slen:dword
listen proto fd:dword, blog:dword
accept proto fd:dword, caddr:qword, slen:qword
send proto fd:dword, buff:qword, blen:dword, flgs:dword
option dllimport:none
exit equ ExitProcess
close equ closesocket
elseif @Platform eq LIN64
;; Required proto from Libc stuff.
malloc proto SYSTEMV mem:qword ;; Required by the class macros.
free proto SYSTEMV mem:qword ;; It uses HeapAlloc on windows.
printf proto SYSTEMV fmt:qword, args:VARARG
strlen proto SYSTEMV buff:qword
socket proto SYSTEMV d:dword, s:dword, prtl:dword
bind proto SYSTEMV fd:dword, saddr:qword, slen:dword
listen proto SYSTEMV fd:dword, blog:dword
accept proto SYSTEMV fd:dword, saddr:qword, slen:qword
send proto SYSTEMV fd:dword, buff:qword, blen:dword, flgs:dword
close proto SYSTEMV fd:dword
exit proto SYSTEMV uexit:dword
else
;; Could do some OSX or w/e specific crap, but I don't use
;; a Mac so, I dunno shit about it's API :]
endif
 
;; Class definitions etc..
CLASS websrv
;; Class Method definitions
CMETHOD serve
ENDMETHODS
;; Class Variables.
if @Platform eq WIN64
wsa WSADATA <?>
endif
tmpl db "[websrv->%s] - %s",10,0
http db "HTTP/1.1 200 OK",13,10,
"Content-Type: text/html; charset=UTF-8",13,10,13,10,
"<html><head><title>Goodbye</title></head><body>Goodbye, World!</body></html>",0
sock dd 0
port dw 8080
ENDCLASS
pwebsrv typedef ptr websrv
 
;; Method implementation..
; Syntax:
; METHOD ClassName, MethodName, <ReturnType>, <USE extra regs for ret>, args..
METHOD websrv, Init, <VOIDARG>, <>
local x:sockaddr_in
 
mov rbx, thisPtr ;; Force the ThisPtr reference reg to be RBX 'cause of windoze
assume rbx:ptr websrv ;; its default is RCX, and RDI on linux. *shrugs*
invoke printf, addr [rbx].tmpl,CSTR("init"), CSTR("Starting...")
if @Platform eq WIN64
invoke WSAStartup, 200h, addr [rbx].wsa
endif
invoke socket, AF_INET, SOCK_STREAM, 0
.if rax == -1
invoke printf, addr [rbx].tmpl, CSTR("init:ERROR"), CSTR("Socket() returned < 0")
mov rax, rbx
ret
.endif
mov [rbx].sock, eax
invoke printf, CSTR("[websrv->init:socket] - %d",10), eax
mov x.sin_family, AF_INET
mov x.sin_addr.s_addr, INADDR_ANY
mov ax, [rbx].port
xchg al,ah
mov x.sin_port, ax
invoke bind, [rbx].sock, addr x, sizeof(x)
.if eax == -1
invoke printf, addr [rbx].tmpl, CSTR("init:ERROR") , CSTR("Bind failed.")
xor eax, eax
mov [rbx].sock, 0
mov rax, rbx
ret
.endif
invoke printf, addr [rbx].tmpl, CSTR("init"), CSTR("Bind successful.")
mov rax, rbx
assume rbx: nothing
ret
ENDMETHOD
 
METHOD websrv, serve, <VOIDARG>, <>
local tmp:qword
local cfd:dword
local x:sockaddr
 
mov rbx, thisPtr
assume rbx:ptr websrv
.if [rbx].sock == 0
ret
.endif
invoke printf, addr [rbx].tmpl,CSTR("serve"), CSTR("Listening for incomming connections")
invoke listen, [rbx].sock, 5
.if rax == -1
invoke printf, addr [rbx].tmpl, CSTR("serve:ERROR"), CSTR("Listen() returned -1")
ret
.endif
 
.while(1)
mov tmp, sizeof(x)
invoke accept, [rbx].sock, addr x, addr tmp
.if eax == -1
invoke printf, addr [rbx].tmpl, CSTR("serve:ERROR"), CSTR("Accept() returned -1")
ret
.endif
mov cfd, eax
invoke printf, addr [rbx].tmpl, CSTR("serve"), CSTR("Connection established.")
invoke strlen, addr [rbx].http
invoke send, cfd, addr [rbx].http, eax , 0
invoke close, cfd
.endw
assume rbx:nothing
ret
ENDMETHOD
 
METHOD websrv, Destroy, <VOIDARG>, <>
mov rbx, thisPtr
assume rbx:ptr websrv
invoke printf, addr [rbx].tmpl,CSTR("destroy"), CSTR("Calling Close and exit.")
invoke close, [rbx].sock
if @Platform eq WIN64
invoke WSACleanup, addr [rbx].wsa
endif
assume rbx:nothing
invoke exit, 0
ret
ENDMETHOD
endif ;; __WEBSRV_CLASS__
 
;; Start of main run code...
.code
main proc
local server:ptr websrv
 
mov server, _NEW(websrv)
server->serve()
_DELETE(server)
ret
main endp
end
</syntaxhighlight>
 
=={{header|zkl}}==
A threaded web server that returns "Goodbye, World!" for every request
<syntaxhighlight lang="zkl">const PORT=8080;
const SERVLET_THREADS=4;
 
// A class to process requests from clients (eg browsers)
// in a thread. Requests are received via a pipe, which feeds
// all Servlet threads.
class Servlet{
fcn init(jobPipe){ self.launch(jobPipe); }
fcn liftoff(jobPipe){
while(1){ // read request, write response, repeat
socket:=jobPipe.read();
if(socket.wait(60) != 1) // what is Chrome doing?
{ socket.close(); continue; }
if (request:=socket.read())
try{ processRequest(request,socket); } catch{}
}
}
fcn splashdown(h,e){ println("Servlet died before its time"); }
}
 
fcn processRequest(request,socket){
response:=responseHeader();
response+="Goodbye, World!";
socket.write(response); socket.close(); // no Keep-Alive
}
 
fcn responseHeader(status=200,reason="OK"){
String(
"HTTP/1.0 ",status," ",reason,"\r\n",
Time.Date.httpDate(),"\r\n"
"Server: ZTWS (zkl)\r\n"
"Connection: close\r\n"
"Content-Type: text/html; charset=UTF-8\r\n"
"\r\n")
}
 
//////////////////// Start the server ///////////////////////
var jobPipe=Thread.Pipe(); // a queue of requests
do(SERVLET_THREADS){ Servlet(jobPipe) } // start threads
 
// Create the HTTP server listen socket
// Sits here forever passing client HTTP connects to Servlets
serverSocket:=Network.TCPServerSocket.open(PORT);
println("HTTP server started at http://",
serverSocket.hostname, ":", serverSocket.port);
serverSocket.listen(jobPipe);</syntaxhighlight>
PureFox
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