HTTPS/Authenticated

HTTPS/Authenticated
You are encouraged to solve this task according to the task description, using any language you may know.

The goal of this task is to demonstrate HTTPS requests with authentication. Implementations of this task should not use client certificates for this: that is the subject of another task.

Arturo

user: "admin"
pass: "admin"

inspect request.headers:#[
    Authorization: "Basic " ++ encode user ++ ":" ++ pass
] "https://httpbin.org/basic-auth/admin/admin" ø

Output:

[ :dictionary
	version  :	1.1 :string
	body     :	{
  "authenticated": true, 
  "user": "admin"
}
 :string
	headers  :	[ :dictionary
		server                            :		gunicorn/19.9.0 :string
		content-length                    :		48 :integer
		access-control-allow-credentials  :		true :logical
		content-type                      :		application/json :string
		date                              :		[ :date
			hour        :			15 :integer
			minute      :			14 :integer
			second      :			57 :integer
			nanosecond  :			0 :integer
			day         :			20 :integer
			Day         :			Tuesday :string
			days        :			353 :integer
			month       :			12 :integer
			Month       :			December :string
			year        :			2022 :integer
			utc         :			-3600 :integer
		]
		access-control-allow-origin       :		* :string
		connection                        :		keep-alive :string
	]
	status   :	200 :integer
]

AutoHotkey

Library: iweb

Library: COM

iWeb_Init()
pwb := iWeb_newGui(0, 0, 1000, 800)
iWeb_nav(pwb, "http://www.facebook.com/login.php?ref=pf")
iWeb_Term()
iWeb_complete(pwb)
inputbox, email, email
inputbox, pass, password
iWeb_setDomObj(pwb,"Email",email)
iWeb_setDomObj(pwb,"pass",pass)
iWeb_clickDomObj(pwb, "login")
return

#Include iweb.ahk
#Include COM.ahk
#Include COMinvokeDeep.ahk

BaCon

OPTION TLS TRUE

website$ = "website.com"
username$ = "nobody"
password$ = "ignore"

OPEN website$ & ":443" FOR NETWORK AS conn
SEND "GET / HTTP/1.1\r\nHost: " & website$ & "\r\nAuthorization: Basic " & B64ENC$(username$ & ":" & password$) & "\r\n\r\n" TO conn

WHILE WAIT(conn, 2000)
    RECEIVE data$ FROM conn
    total$ = total$ & data$
    IF INSTR(data$, "</html>") THEN BREAK
WEND
CLOSE NETWORK conn

PRINT total$

C

Library: libcurl

#include <stdio.h>
#include <stdlib.h>
#include "curl/curl.h"

int
main(void)
{
        CURL *curl;
        char buffer[CURL_ERROR_SIZE];

        if ((curl = curl_easy_init()) != NULL) {
                curl_easy_setopt(curl, CURLOPT_URL, "https://user:password@secure.example.com/");
                curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1);
                curl_easy_setopt(curl, CURLOPT_ERRORBUFFER, buffer);
                if (curl_easy_perform(curl) != CURLE_OK) {
                        fprintf(stderr, "%s\n", buffer);
                        return EXIT_FAILURE;
                }
                curl_easy_cleanup(curl);
        }
        return EXIT_SUCCESS;
}

C#

Works with: C sharp version 3.0

using System;
using System.Net;

class Program
{
    static void Main(string[] args)
    {
        var client = new WebClient();

        // credentials of current user:
        client.Credentials = CredentialCache.DefaultCredentials;
        // or specify credentials manually:
        client.Credentials = new NetworkCredential("User", "Password");

        var data = client.DownloadString("https://example.com");

        Console.WriteLine(data);
    }
}

Clojure

Library: clj-http

(clj-http.client/get "https://somedomain.com" 
                     {:basic-auth ["user" "pass"]})

Delphi

program ShowHTTPSAuthenticated;

{$APPTYPE CONSOLE}

uses IdHttp, IdSSLOpenSSL;

var
  s: string;
  lHTTP: TIdHTTP;
  lIOHandler: TIdSSLIOHandlerSocketOpenSSL;
begin
  ReportMemoryLeaksOnShutdown := True;
  lHTTP := TIdHTTP.Create(nil);
  lIOHandler := TIdSSLIOHandlerSocketOpenSSL.Create(nil);
  try
    lHTTP.Request.Username := 'USERNAME';
    lHTTP.Request.Password := 'PASSWD';
    lHTTP.IOHandler := lIOHandler;
    lHTTP.HandleRedirects := True;
    s := lHTTP.Get('https://SomeSecureSite.net/');
    Writeln(s);
  finally
    lHTTP.Free;
    lIOHandler.Free;
  end;
end.

Go

The task solution is really the client program, but to test it I wrote a server and created a custom certificate. I won't describe the certificate, but this is the server:

package main

import (
    "encoding/base64"
    "io"
    "log"
    "net/http"
    "strings"
)

const userPass = "rosetta:code"
const unauth = http.StatusUnauthorized

func hw(w http.ResponseWriter, req *http.Request) {
    auth := req.Header.Get("Authorization")
    if !strings.HasPrefix(auth, "Basic ") {
        log.Print("Invalid authorization:", auth)
        http.Error(w, http.StatusText(unauth), unauth)
        return
    }
    up, err := base64.StdEncoding.DecodeString(auth[6:])
    if err != nil {
        log.Print("authorization decode error:", err)
        http.Error(w, http.StatusText(unauth), unauth)
        return
    }
    if string(up) != userPass {
        log.Print("invalid username:password:", string(up))
        http.Error(w, http.StatusText(unauth), unauth)
        return
    }
    io.WriteString(w, "Goodbye, World!")
}

func main() {
    http.HandleFunc("/", hw)
    log.Fatal(http.ListenAndServeTLS(":8080", "cert.pem", "key.pem", nil))
}

It is a "Hello world" server, but over TLS and with basic authentication required on the Get. Errors are logged to aid client debugging.

The client:

package main

import (
    "crypto/tls"
    "crypto/x509"
    "fmt"
    "io/ioutil"
    "log"
    "net/http"
)

const (
    userid   = "rosetta"
    password = "code"
)

func main() {
    // Use custom certificate for testing.  Not exactly required by task.
    b, err := ioutil.ReadFile("cert.pem")
    if err != nil {
        log.Fatal(err)
    }
    pool := x509.NewCertPool()
    if ok := pool.AppendCertsFromPEM(b); !ok {
        log.Fatal("Failed to append cert")
    }
    tc := &tls.Config{RootCAs: pool}
    tr := &http.Transport{TLSClientConfig: tc}
    client := &http.Client{Transport: tr}
    req, err := http.NewRequest("GET", "https://127.0.0.1:8080", nil)
    if err != nil {
        log.Fatal(err)
    }

    // This one line implements the authentication required for the task.
    req.SetBasicAuth(userid, password)

    // Make request and show output.
    resp, err := client.Do(req)
    if err != nil {
        log.Fatal(err)
    }
    b, err = ioutil.ReadAll(resp.Body)
    resp.Body.Close()
    if err != nil {
        log.Fatal(err)
    }
    fmt.Println(string(b))
}

Haskell

Example uses the req and aeson packages:

{-# LANGUAGE OverloadedStrings #-}

module Main (main) where

import           Data.Aeson (Value)
import           Data.Default.Class (def)
import           Network.HTTP.Req
                    ( (/:)
                    , GET(..)
                    , NoReqBody(..)
                    , basicAuth
                    , https
                    , jsonResponse
                    , req
                    , responseBody
                    , runReq
                    )

main :: IO ()
main = do
    response <- runReq def $ req
            GET
            (https "httpbin.org" /: "basic-auth" /: "someuser" /: "somepassword")
            NoReqBody
            jsonResponse
            (basicAuth "someuser" "somepassword")
    print (responseBody response :: Value)

Java

import java.io.IOException;
import java.net.Authenticator;
import java.net.PasswordAuthentication;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandlers;

public final class HTTPSAuthenticated {

	public static void main(String[] aArgs) throws IOException, InterruptedException, URISyntaxException {
		HttpClient client = HttpClient.newBuilder()
			.authenticator( new MyAuthenticator() )
			.build();

		HttpRequest request = HttpRequest.newBuilder()
			.GET()
			.uri( new URI("https://postman-echo.com/basic-auth") ) // This website requires authentication
			.build();

		HttpResponse<String> response = client.send(request, BodyHandlers.ofString());

		System.out.println("Status: " +  response.statusCode());
	}

}

final class MyAuthenticator extends Authenticator {
	
	@Override
	protected PasswordAuthentication getPasswordAuthentication() {
		String username = "kingkong";
		String password = "test1234";
		return new PasswordAuthentication(username, password.toCharArray());
	}
	
}

Output:

Status: 200

Julia

An example using HTTP (see the source for HTTP.jl for the code below ) to access and play a song:

using HTTP, HTTP.IOExtras, JSON, MusicProcessing
HTTP.open("POST", "http://music.com/play") do io
    write(io, JSON.json([
        "auth" => "12345XXXX",
        "song_id" => 7,
    ]))
    r = startread(io)
    @show r.status
    while !eof(io)
        bytes = readavailable(io)
        play(bytes)
    end
end

Kotlin

// version 1.2.0

import java.net.Authenticator
import java.net.PasswordAuthentication
import javax.net.ssl.HttpsURLConnection
import java.net.URL
import java.io.InputStreamReader
import java.io.BufferedReader

object PasswordAuthenticator : Authenticator() {
    override fun getPasswordAuthentication() =
        PasswordAuthentication ("username", "password".toCharArray())
}

fun main(args: Array<String>) {
    val url = URL("https://somehost.com")
    val con = url.openConnection() as HttpsURLConnection
    Authenticator.setDefault(PasswordAuthenticator)
    con.allowUserInteraction = true
    con.connect()
    val isr = InputStreamReader(con.inputStream)
    val br = BufferedReader(isr)
    while (true) {
        val line = br.readLine()
        if (line == null) break
        println(line)
    }
}

Lasso

local(username = 'hello',password = 'world')
local(x = curl('https://sourceforge.net'))
#x->set(CURLOPT_USERPWD, #username + ':' + #password)
local(y = #x->result)
#y->asString

LiveCode

HTTP Basic Auth as part of url

command getAuthWebResource
    libURLFollowHttpRedirects true
    libURLSetSSLVerification true
    put URL "https://user:passwd@example.basicauth.com/" into response
    put response
end getAuthWebResource

You can also set the headers for the basic auth requests

command getAuthWebResource
    libURLFollowHttpRedirects true
    libURLSetSSLVerification true
    set the httpHeaders to "Authorization: Basic " && base64Encode("user:passwd")
    put URL "https://example.basicauth.com" into response
    put response
end getAuthWebResource

Lua

Works with: Lua version 5.1 - 5.3

Library: lua-requests

local requests = require('requests')
local auth = requests.HTTPBasicAuth('admin', 'admin')
local resp, e = requests.get({
  url = 'https://httpbin.org/basic-auth/admin/admin',
  auth = auth
})
io.write(string.format('Status: %d', resp.status_code))

Output:

Status: 200

Mathematica / Wolfram Language

a = RunThrough["curl -u JohnDoe:Password https://www.example.com", 1]
For[ i=0, i < Length[a] , i++, SomeFunction[a]]

Nim

Library: OpenSSL

Compile with command nim c -d:ssl https_authenticated.nim.

import httpclient, base64

const
  User = "admin"
  Password = "admin"

let headers = newHttpHeaders({"Authorization": "Basic " & base64.encode(User & ":" & Password)})
let client = newHttpClient(headers = headers)
echo client.getContent("https://httpbin.org/basic-auth/admin/admin")

Perl

Library: LWP

use LWP::UserAgent qw();
my $ua = LWP::UserAgent->new;
my $netloc = 'http://www.buddhism-dict.net/cgi-bin/xpr-dealt.pl:80';
$ua->credentials(
   $netloc,
   'CJK-E and Buddhist Dictionaries', # basic realm
   'guest',  # user
   '',       # empty pw
);
my $response = $ua->get($netloc);

use WWW::Mechanize qw();
my $mech = WWW::Mechanize->new;
$mech->get('https://login.yahoo.com/');
$mech->submit_form(with_fields => {
    login         => 'XXXXXX',
    passwd        => 'YYYYYY',
    '.persistent' => 'y',  # tick checkbox
});

Phix

Library: Phix/libcurl

Exactly the same as the HTTP#Phix task. You can of course use curl_easy_setopt(curl,CURLOPT_USERPWD,"user:password") rather than embed that in the url.

without js
include builtins\libcurl.e
curl_global_init()
atom curl = curl_easy_init()
curl_easy_setopt(curl, CURLOPT_URL, "https://user:password@example.com/")
object res = curl_easy_perform_ex(curl)
curl_easy_cleanup(curl)
curl_global_cleanup()
 
puts(1,res)

PicoLisp

(let (User "Bill"  Pass "T0p5ecRet"  Url "https://www.example.com")
   (in (list 'curl "-u" (pack User ': Pass) Url)
      (while (line)
         (doSomeProcessingWithLine @) ) ) )

PowerShell

Translation of: C#

$client = [Net.WebClient]::new()
# credentials of current user:
$client.Credentials = [Net.CredentialCache]::DefaultCredentials
# or specify credentials manually:
# $client.Credentials = [System.Net.NetworkCredential]::new("User", "Password")
$data = $client.DownloadString("https://example.com")
Write-Host $data

Python

Works with: Python version 2.4 and 2.6

Note: You should install mechanize to run code below. Visit: http://wwwsearch.sourceforge.net/mechanize/

#!/usr/bin/python
# -*- coding: utf-8 -*-

from mechanize import Browser

USER_AGENT = "Mozilla/5.0 (X11; U; Linux i686; tr-TR; rv:1.8.1.9) Gecko/20071102 Pardus/2007 Firefox/2.0.0.9"

br = Browser()
br.addheaders = [("User-agent", USER_AGENT)]

# remove comment if you get debug output
# br.set_debug_redirects(True)
# br.set_debug_responses(True)
# br.set_debug_http(True)

br.open("https://www.facebook.com")

br.select_form("loginform")
br['email'] = "xxxxxxx@xxxxx.com"
br['pass'] = "xxxxxxxxx"
br['persistent'] = ["1"]

response = br.submit()
print response.read()

Library: Requests

Works with: Python version 2.7, 3.4–3.7

import requests

username = "user"
password = "pass"
url = "https://www.example.com"

response = requests.get(url, auth=(username, password)

print(response.text)

Racket

#lang racket

(require net/url net/url-connect openssl)

(module+ main
  (parameterize ([current-https-protocol (ssl-make-client-context)])
    (ssl-set-verify! (current-https-protocol) #t)

    ;; When this is #f, we correctly get an exception:
    ;; error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
    (when #t
      (ssl-load-verify-source! (current-https-protocol)
                               '(directory
                                 ;; This location works on Debian 6;
                                 ;; adjust as needed for your platform.
                                 "/etc/ssl/certs"
                                 )))

    (for ([l (in-port read-line (get-pure-port (string->url "https://www.google.com/")))])
      (displayln  l))))

Raku

(formerly Perl 6)

Works with: Rakudo version 2017.09

Used here to connect to my local wireless router to a page that is password protected. Obviously not going to be generally publicly accessible but should be easily adaptable to other sites / devices.

use HTTP::UserAgent;

my $username = 'username'; # my username
my $password = 'password'; # my password
my $address  = 'http://192.168.1.1/Status_Router.asp'; # my local wireless router

my $ua = HTTP::UserAgent.new;
$ua.auth( $username, $password );
my $response = $ua.get: $address;
say $response.is-success ?? $response.content !! $response.status-line;

Ruby

require 'uri'
require 'net/http'

uri = URI.parse('https://www.example.com')
response = Net::HTTP.start(uri.host, uri.port, use_ssl: true) do |http|
  request = Net::HTTP::Get.new uri
  request.basic_auth('username', 'password')
  http.request request
end

Run BASIC

html "
<CENTER><TABLE CELLPADDING=0 CELLSPACING=0 border=1 bgcolor=wheat>
<TR><TD colspan=2 bgcolor=tan align=center>LOGIN</TD></TR>
<TR><TD align=right>UserName</TD><TD>" 
 TEXTBOX #userName, "" 
html "</TR></TD><TR><TD align=right>Password:</TD><TD>"
PasswordBox  #passWord, "" 

html "</TD></TR><TD align=center colspan=2>"
button #si, "Signin", [doSignin]
html "   "
button #ex, "Exit", [exit]
html "</TD></TR></TABLE>"
WAIT

[doSignin]
loginUserName$    = trim$(#userName contents$())
loginPassWord$    = trim$(#passWord contents$())
if (loginUserName$ = "admin" and loginPassWord$ = "admin" then
   print "Login ok"
  else
   print "invalid User or Pass"
   cls
   goto [loop]
end if

print Platform$    ' OS where Run BASIC is being hosted
print UserInfo$    ' Information about the user's web browser
print UserAddress$ ' IP address of the user

[exit]
end

Rust

extern crate reqwest;

use reqwest::blocking::Client;
use reqwest::header::CONNECTION;

fn main() {
    let client = Client::new();

    // reqwest uses strongly-typed structs for creating headers
    let res = client
        .get("https://www.example.com")
        .basic_auth("user", Some("password"))
        .header(CONNECTION, "close")
        .send()
        .unwrap();

    let body = res.text().unwrap();

    println!("{}", body);
}

Output:

Scala

import java.net.{Authenticator, PasswordAuthentication, URL}

import javax.net.ssl.HttpsURLConnection

import scala.io.BufferedSource


object Authenticated extends App {

  val con: HttpsURLConnection =
    new URL("https://somehost.com").openConnection().asInstanceOf[HttpsURLConnection]

  object PasswordAuthenticator extends Authenticator {
    override def getPasswordAuthentication = 
      new PasswordAuthentication("username", "password".toCharArray)
  }

  Authenticator.setDefault(PasswordAuthenticator)
  con.setAllowUserInteraction(true)
  con.connect()

  new BufferedSource(con.getInputStream).getLines.foreach(println(_))

}

Sidef

require('WWW::Mechanize')

var mech = %s'WWW::Mechanize'.new(
    cookie_jar => Hash.new,
    agent => 'Mozilla/5.0',
)

mech.get('https://login.yahoo.com/')
mech.submit_form(
    form_id => 'mbr-login-form',   # form id
    fields => Hash.new(
        'login'  => 'XXXXXX',
        'passwd' => 'YYYYYY',
))

Tcl

Works with: Tcl version 8.6

for the binary encode subcommand, otherwise uses

Library: Tcllib (Package: base64)

Uses the Tls package.

package require http
package require tls
http::register https 443 ::tls::socket

# Generate the authentication
set user theUser
set pass thePassword
dict set auth Authenticate "Basic [binary encode base64 ${user}:${pass}]"

# Make a secure authenticated connection
set token [http::geturl https://secure.example.com/ -headers $auth]

# Now as for conventional use of the “http” package
set data [http::data $token]
http::cleanup $token

Visual Basic

Library: Microsoft.WinHttp

Works with: Visual Basic version 5

Works with: Visual Basic version 6

Works with: VBA version Access 97

Works with: VBA version 6.5

Works with: VBA version 7.1

Sub Main()
'  in the "references" dialog of the IDE, check
'  "Microsoft WinHTTP Services, version 5.1" (winhttp.dll)
Dim HttpReq As WinHttp.WinHttpRequest
Const WINHTTP_FLAG_SECURE_PROTOCOL_TLS1     As Long = &H80&
Const WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1   As Long = &H200&
Const WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2   As Long = &H800&
Const HTTPREQUEST_PROXYSETTING_PROXY        As Long = 2
#Const USE_PROXY = 1
  Set HttpReq = New WinHttp.WinHttpRequest
  HttpReq.Open "GET", "https://www.abc.com/xyz/index.html"
  HttpReq.Option(WinHttpRequestOption_SecureProtocols) = WINHTTP_FLAG_SECURE_PROTOCOL_TLS1 Or _
                                                         WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_1 Or _
                                                         WINHTTP_FLAG_SECURE_PROTOCOL_TLS1_2
  HttpReq.SetCredentials "<username>", "<password>", 0&
#If USE_PROXY Then
  HttpReq.SetProxy HTTPREQUEST_PROXYSETTING_PROXY, "10.167.1.1:80"
#End If
  HttpReq.SetTimeouts 1000, 1000, 1000, 1000
  HttpReq.Send
  Debug.Print HttpReq.ResponseText
End Sub

Wren

Translation of: C

Library: libcurl

An embedded program so we can ask the C host to communicate with libcurl for us.

/* HTTPS_Authenticated.wren */

var CURLOPT_URL = 10002
var CURLOPT_FOLLOWLOCATION = 52
var CURLOPT_ERRORBUFFER = 10010

foreign class Curl {
    construct easyInit() {}

    foreign easySetOpt(opt, param)

    foreign easyPerform()

    foreign easyCleanup()
}

var curl = Curl.easyInit()
if (curl == 0) {
    System.print("Error initializing cURL.")
    return
}
curl.easySetOpt(CURLOPT_URL, "https://user:password@secure.example.com/")
curl.easySetOpt(CURLOPT_FOLLOWLOCATION, 1)
curl.easySetOpt(CURLOPT_ERRORBUFFER, 0) // buffer to be supplied by C

var status = curl.easyPerform()
if (status != 0) {
    System.print("Failed to perform task.")
    return
}
curl.easyCleanup()

We now embed this in the following C program, compile and run it.

/* gcc HTTPS_Authenticated.c -o HTTPS_Authenticated -lcurl -lwren -lm  */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <curl/curl.h>
#include "wren.h"

/* C <=> Wren interface functions */

void C_curlAllocate(WrenVM* vm) {
    CURL** pcurl = (CURL**)wrenSetSlotNewForeign(vm, 0, 0, sizeof(CURL*));
    *pcurl = curl_easy_init();
}

void C_easyPerform(WrenVM* vm) {
    CURL* curl = *(CURL**)wrenGetSlotForeign(vm, 0);
    CURLcode cc = curl_easy_perform(curl);
    wrenSetSlotDouble(vm, 0, (double)cc);
}

void C_easyCleanup(WrenVM* vm) {
    CURL* curl = *(CURL**)wrenGetSlotForeign(vm, 0);
    curl_easy_cleanup(curl);
}

void C_easySetOpt(WrenVM* vm) {
    CURL* curl = *(CURL**)wrenGetSlotForeign(vm, 0);
    CURLoption opt = (CURLoption)wrenGetSlotDouble(vm, 1);
    if (opt < 10000) {
        long lparam = (long)wrenGetSlotDouble(vm, 2);
        curl_easy_setopt(curl, opt, lparam);
    } else {
        if (opt == CURLOPT_URL) {
            const char *url = wrenGetSlotString(vm, 2);
            curl_easy_setopt(curl, opt, url);
        } else if (opt == CURLOPT_ERRORBUFFER) {
            char buffer[CURL_ERROR_SIZE];
            curl_easy_setopt(curl, opt, buffer);
        }
    }
}

WrenForeignClassMethods bindForeignClass(WrenVM* vm, const char* module, const char* className) {
    WrenForeignClassMethods methods;
    methods.allocate = NULL;
    methods.finalize = NULL;
    if (strcmp(module, "main") == 0) {
        if (strcmp(className, "Curl") == 0) {
            methods.allocate = C_curlAllocate;
        }
    }
    return methods;
}

WrenForeignMethodFn bindForeignMethod(
    WrenVM* vm,
    const char* module,
    const char* className,
    bool isStatic,
    const char* signature) {
    if (strcmp(module, "main") == 0) {
        if (strcmp(className, "Curl") == 0) {
            if (!isStatic && strcmp(signature, "easySetOpt(_,_)") == 0) return C_easySetOpt;
            if (!isStatic && strcmp(signature, "easyPerform()") == 0)   return C_easyPerform;
            if (!isStatic && strcmp(signature, "easyCleanup()") == 0)   return C_easyCleanup;
        }
    }
    return NULL;
}

static void writeFn(WrenVM* vm, const char* text) {
    printf("%s", text);
}

void errorFn(WrenVM* vm, WrenErrorType errorType, const char* module, const int line, const char* msg) {
    switch (errorType) {
        case WREN_ERROR_COMPILE:
            printf("[%s line %d] [Error] %s\n", module, line, msg);
            break;
        case WREN_ERROR_STACK_TRACE:
            printf("[%s line %d] in %s\n", module, line, msg);
            break;
        case WREN_ERROR_RUNTIME:
            printf("[Runtime Error] %s\n", msg);
            break;
    }
}

char *readFile(const char *fileName) {
    FILE *f = fopen(fileName, "r");
    fseek(f, 0, SEEK_END);
    long fsize = ftell(f);
    rewind(f);
    char *script = malloc(fsize + 1);
    fread(script, 1, fsize, f);
    fclose(f);
    script[fsize] = 0;
    return script;
}

int main(int argc, char **argv) {
    WrenConfiguration config;
    wrenInitConfiguration(&config);
    config.writeFn = &writeFn;
    config.errorFn = &errorFn;
    config.bindForeignClassFn = &bindForeignClass;
    config.bindForeignMethodFn = &bindForeignMethod;
    WrenVM* vm = wrenNewVM(&config);
    const char* module = "main";
    const char* fileName = "HTTPS_Authenticated.wren";
    char *script = readFile(fileName);
    WrenInterpretResult result = wrenInterpret(vm, module, script);
    switch (result) {
        case WREN_RESULT_COMPILE_ERROR:
            printf("Compile Error!\n");
            break;
        case WREN_RESULT_RUNTIME_ERROR:
            printf("Runtime Error!\n");
            break;
        case WREN_RESULT_SUCCESS:
            break;
    }
    wrenFreeVM(vm);
    free(script);
    return 0;
}

zkl

Using cURL to do the heavy lifting, get a XML list of computers connected to my router.

zkl: var ZC=Import("zklCurl")
zkl: var data=ZC().get("http://usr:pw@192.168.1.1/computer_list.xml")
L(Data(1,049),121,0)
zkl: data[0][121,*].text

Output:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<computers>
<ip_address0>192.168.1.100</ip_address0><host_name0>core-shot
...