Forked from michaelphipps/ably-jwt-authentication-send-json.php
Created
August 19, 2021 07:22
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Send a JSON message with Ably.com using JWT Authentication in PHP without using the official Ably PHP SDK.
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<?php | |
// $ composer require lcobucci/jwt | |
require __DIR__ . '/vendor/autoload.php'; | |
use Lcobucci\JWT\Configuration; | |
use Lcobucci\JWT\Signer\Key\InMemory; | |
use Lcobucci\JWT\Signer\Hmac\Sha256; | |
$ably_publish_key = <YOUR PUBLISH KEY HERE> | |
list($api_key, $api_secret) = explode(":", $ably_publish_key); | |
$secret = base64_encode($api_secret); | |
$config = Configuration::forSymmetricSigner(new Sha256(), InMemory::base64Encoded($secret)); | |
assert($config instanceof Configuration); | |
$now = new DateTimeImmutable(); | |
$token = $config->builder(\Lcobucci\JWT\Encoding\ChainedFormatter::withUnixTimestampDates()) // withUnixTimestampDates removes microseconds | |
->withHeader('kid', $api_key) | |
->issuedAt($now) | |
->expiresAt($now->modify('+5 minutes')) | |
->withClaim('x-ably-capability', "{\"*\":[\"*\"]}") | |
->getToken($config->signer(), $config->signingKey()); | |
$params = http_build_query(["data"=> json_encode(["message"=>"Hello World"])]); | |
$headers[] = "Authorization: Bearer ".$token->toString(); | |
$ch = curl_init(); | |
curl_setopt($ch, CURLOPT_URL, "https://rest.ably.io/channels/<YOUR CHANNEL>/publish"); | |
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); | |
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); | |
curl_setopt($ch, CURLOPT_POST, true); | |
curl_setopt($ch, CURLOPT_POSTFIELDS, $params); | |
$output = curl_exec($ch); | |
curl_close($ch); | |
// inspect the contents of $output to see if it worked! |
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