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<?php
namespace Pusher;
use GuzzleHttp\ClientInterface;
use GuzzleHttp\Exception\ConnectException;
use GuzzleHttp\Exception\GuzzleException;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;
use Psr\Log\LoggerInterface;
use Psr\Log\LogLevel;
use GuzzleHttp\Psr7\Request;
use GuzzleHttp\Promise\PromiseInterface;
class Pusher implements LoggerAwareInterface, PusherInterface
{
use LoggerAwareTrait;
/**
* @var string Version
*/
public static $VERSION = '7.2.4';
/**
* @var null|PusherCrypto
*/
private $crypto;
/**
* @var array Settings
*/
private $settings = [
'scheme' => 'http',
'port' => 80,
'path' => '',
'timeout' => 30,
];
/**
* @var null|resource
*/
private $client = null; // Guzzle client
/**
* Initializes a new Pusher instance with key, secret, app ID and channel.
*
* @param string $auth_key
* @param string $secret
* @param string $app_id
* @param array $options [optional]
* Options to configure the Pusher instance.
* scheme - e.g. http or https
* host - the host e.g. api-mt1.pusher.com. No trailing forward slash.
* port - the http port
* timeout - the http timeout
* useTLS - quick option to use scheme of https and port 443 (default is true).
* cluster - cluster name to connect to.
* encryption_master_key_base64 - a 32 byte key, encoded as base64. This key, along with the channel name, are used to derive per-channel encryption keys. Per-channel keys are used to encrypt event data on encrypted channels.
* @param ClientInterface|null $client [optional] - a Guzzle client to use for all HTTP requests
*
* @throws PusherException Throws exception if any required dependencies are missing
*/
public function __construct(string $auth_key, string $secret, string $app_id, array $options = [], ClientInterface $client = null)
{
$this->check_compatibility();
$useTLS = true;
if (isset($options['useTLS'])) {
$useTLS = $options['useTLS'] === true;
}
if (
$useTLS &&
!isset($options['scheme']) &&
!isset($options['port'])
) {
$options['scheme'] = 'https';
$options['port'] = 443;
}
$this->settings['auth_key'] = $auth_key;
$this->settings['secret'] = $secret;
$this->settings['app_id'] = $app_id;
$this->settings['base_path'] = '/apps/' . $this->settings['app_id'];
foreach ($options as $key => $value) {
// only set if valid setting/option
if (isset($this->settings[$key])) {
$this->settings[$key] = $value;
}
}
// handle the case when 'host' and 'cluster' are specified in the options.
if (!array_key_exists('host', $this->settings)) {
if (array_key_exists('host', $options)) {
$this->settings['host'] = $options['host'];
} elseif (array_key_exists('cluster', $options)) {
$this->settings['host'] = 'api-' . $options['cluster'] . '.pusher.com';
} else {
$this->settings['host'] = 'api-mt1.pusher.com';
}
}
// ensure host doesn't have a scheme prefix
$this->settings['host'] = preg_replace('/http[s]?\:\/\//', '', $this->settings['host'], 1);
if (!array_key_exists('encryption_master_key_base64', $options)) {
$options['encryption_master_key_base64'] = '';
}
if ($options['encryption_master_key_base64'] !== '') {
$parsedKey = PusherCrypto::parse_master_key(
$options['encryption_master_key_base64']
);
$this->crypto = new PusherCrypto($parsedKey);
}
if (!is_null($client)) {
$this->client = $client;
} else {
$this->client = new \GuzzleHttp\Client(['timeout' => $this->settings['timeout'],]);
}
}
/**
* Fetch the settings.
*
* @return array
*/
public function getSettings(): array
{
return $this->settings;
}
/**
* Log a string.
*
* @param string $msg The message to log
* @param array|\Exception $context [optional] Any extraneous information that does not fit well in a string.
* @param string $level [optional] Importance of log message, highly recommended to use Psr\Log\LogLevel::{level}
*/
private function log(string $msg, array $context = [], string $level = LogLevel::DEBUG): void
{
if (is_null($this->logger)) {
return;
}
if ($this->logger instanceof LoggerInterface) {
$this->logger->log($level, $msg, $context);
return;
}
// Support old style logger (deprecated)
$msg = sprintf('Pusher: %s: %s', strtoupper($level), $msg);
$replacement = [];
foreach ($context as $k => $v) {
$replacement['{' . $k . '}'] = $v;
}
$this->logger->log($level, strtr($msg, $replacement));
}
/**
* Check if the current PHP setup is sufficient to run this class.
*
* @throws PusherException If any required dependencies are missing
*/
private function check_compatibility(): void
{
if (!extension_loaded('json')) {
throw new PusherException('The Pusher library requires the PHP JSON module. Please ensure it is installed');
}
if (!in_array('sha256', hash_algos(), true)) {
throw new PusherException('SHA256 appears to be unsupported - make sure you have support for it, or upgrade your version of PHP.');
}
}
/**
* Validate number of channels and channel name format.
*
* @param string[] $channels An array of channel names to validate
*
* @throws PusherException If $channels is too big or any channel is invalid
*/
private function validate_channels(array $channels): void
{
if (count($channels) > 100) {
throw new PusherException('An event can be triggered on a maximum of 100 channels in a single call.');
}
foreach ($channels as $channel) {
$this->validate_channel($channel);
}
}
/**
* Ensure a channel name is valid based on our spec.
*
* @param string $channel The channel name to validate
*
* @throws PusherException If $channel is invalid
*/
private function validate_channel(string $channel): void
{
if (!preg_match('/\A#?[-a-zA-Z0-9_=@,.;]+\z/', $channel)) {
throw new PusherException('Invalid channel name ' . $channel);
}
}
/**
* Ensure a socket_id is valid based on our spec.
*
* @param string $socket_id The socket ID to validate
*
* @throws PusherException If $socket_id is invalid
*/
private function validate_socket_id(string $socket_id): void
{
if ($socket_id !== null && !preg_match('/\A\d+\.\d+\z/', $socket_id)) {
throw new PusherException('Invalid socket ID ' . $socket_id);
}
}
/**
* Ensure an user id is valid based on our spec.
*
* @param string $user_id The user id to validate
*
* @throws PusherException If $user_id is invalid
*/
private function validate_user_id(string $user_id): void
{
if ($user_id === null || empty($user_id)) {
throw new PusherException('Invalid user id ' . $user_id);
}
}
/**
* Utility function used to generate signing headers
*
* @param string $path
* @param string $request_method
* @param array $query_params [optional]
*
* @return array
*/
private function sign(string $path, string $request_method = 'GET', array $query_params = []): array
{
return self::build_auth_query_params(
$this->settings['auth_key'],
$this->settings['secret'],
$request_method,
$path,
$query_params
);
}
/**
* Build the Channels url prefix.
*
* @return string
*/
private function channels_url_prefix(): string
{
return $this->settings['scheme'] . '://' . $this->settings['host'] . ':' . $this->settings['port'] . $this->settings['path'];
}
/**
* Build the required HMAC'd auth string.
*
* @param string $auth_key
* @param string $auth_secret
* @param string $request_method
* @param string $request_path
* @param array $query_params [optional]
* @param string $auth_version [optional]
* @param string|null $auth_timestamp [optional]
* @return array
*/
public static function build_auth_query_params(
string $auth_key,
string $auth_secret,
string $request_method,
string $request_path,
array $query_params = [],
string $auth_version = '1.0',
string $auth_timestamp = null
): array {
$params = [];
$params['auth_key'] = $auth_key;
$params['auth_timestamp'] = (is_null($auth_timestamp) ? time() : $auth_timestamp);
$params['auth_version'] = $auth_version;
$params = array_merge($params, $query_params);
ksort($params);
$string_to_sign = "$request_method\n" . $request_path . "\n" . self::array_implode('=', '&', $params);
$auth_signature = hash_hmac('sha256', $string_to_sign, $auth_secret, false);
$params['auth_signature'] = $auth_signature;
return $params;
}
/**
* Implode an array with the key and value pair giving
* a glue, a separator between pairs and the array
* to implode.
*
* @param string $glue The glue between key and value
* @param string $separator Separator between pairs
* @param array|string $array The array to implode
*
* @return string The imploded array
*/
public static function array_implode(string $glue, string $separator, $array): string
{
if (!is_array($array)) {
return $array;
}
$string = [];
foreach ($array as $key => $val) {
if (is_array($val)) {
$val = implode(',', $val);
}
$string[] = "{$key}{$glue}{$val}";
}
return implode($separator, $string);
}
/**
* @deprecated in favour of of trigger and triggerAsync
*/
public function make_request($channels, string $event, $data, array $params = [], bool $already_encoded = false): Request
{
if (is_string($channels) === true) {
$channels = [$channels];
}
$this->validate_channels($channels);
if (isset($params['socket_id'])) {
$this->validate_socket_id($params['socket_id']);
}
$has_encrypted_channel = false;
foreach ($channels as $chan) {
if (PusherCrypto::is_encrypted_channel($chan)) {
$has_encrypted_channel = true;
break;
}
}
if ($has_encrypted_channel) {
if (count($channels) > 1) {
// For rationale, see limitations of end-to-end encryption in the README
throw new PusherException('You cannot trigger to multiple channels when using encrypted channels');
} else {
try {
$data_encoded = $this->crypto->encrypt_payload(
$channels[0],
$already_encoded ? $data : json_encode($data, JSON_THROW_ON_ERROR)
);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
} else {
try {
$data_encoded = $already_encoded ? $data : json_encode($data, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
$query_params = [];
$path = $this->settings['base_path'] . '/events';
// json_encode might return false on failure
if (!$data_encoded) {
$this->log('Failed to perform json_encode on the the provided data: {error}', [
'error' => print_r($data, true),
], LogLevel::ERROR);
}
$post_params = [];
$post_params['name'] = $event;
$post_params['data'] = $data_encoded;
$post_params['channels'] = array_values($channels);
$all_params = array_merge($post_params, $params);
try {
$post_value = json_encode($all_params, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
$query_params['body_md5'] = md5($post_value);
$signature = $this->sign($path, 'POST', $query_params);
$this->log('trigger POST: {post_value}', compact('post_value'));
$headers = [
'Content-Type' => 'application/json',
'X-Pusher-Library' => 'pusher-http-php ' . self::$VERSION
];
$params = array_merge($signature, $query_params);
$query_string = self::array_implode('=', '&', $params);
$full_path = ltrim($path, '/') . "?" . $query_string;
return new Request('POST', $full_path, $headers, $post_value);
}
/**
* Trigger an event by providing event name and payload.
* Optionally provide a socket ID to exclude a client (most likely the sender).
*
* @param array|string $channels A channel name or an array of channel names to publish the event on.
* @param string $event
* @param mixed $data Event data
* @param array $params [optional]
* @param bool $already_encoded [optional]
*
* @return object
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
* @throws PusherException Throws PusherException if $channels is an array of size 101 or above or $socket_id is invalid
*/
public function trigger($channels, string $event, $data, array $params = [], bool $already_encoded = false): object
{
$post_value = $this->make_trigger_body($channels, $event, $data, $params, $already_encoded);
$this->log('trigger POST: {post_value}', compact('post_value'));
return $this->process_trigger_result($this->post('/events', $post_value));
}
/**
* Asynchronously trigger an event by providing event name and payload.
* Optionally provide a socket ID to exclude a client (most likely the sender).
*
* @param array|string $channels A channel name or an array of channel names to publish the event on.
* @param string $event
* @param mixed $data Event data
* @param array $params [optional]
* @param bool $already_encoded [optional]
*
* @return PromiseInterface
* @throws PusherException
*/
public function triggerAsync($channels, string $event, $data, array $params = [], bool $already_encoded = false): PromiseInterface
{
$post_value = $this->make_trigger_body($channels, $event, $data, $params, $already_encoded);
$this->log('trigger POST: {post_value}', compact('post_value'));
return $this->postAsync('/events', $post_value)->then(function ($result) {
return $this->process_trigger_result($result);
});
}
/**
* Send an event to a user.
*
* @param string $user_id
* @param string $event
* @param mixed $data Event data
* @param bool $already_encoded [optional]
*
* @return object
* @throws PusherException
*/
public function sendToUser(string $user_id, string $event, $data, bool $already_encoded = false): object
{
$this->validate_user_id($user_id);
return $this->trigger(["#server-to-user-$user_id"], $event, $data, [], $already_encoded);
}
/**
* Asynchronously send an event to a user.
*
* @param string $user_id
* @param string $event
* @param mixed $data Event data
* @param bool $already_encoded [optional]
*
* @return PromiseInterface
* @throws PusherException
*/
public function sendToUserAsync(string $user_id, string $event, $data, bool $already_encoded = false): PromiseInterface
{
$this->validate_user_id($user_id);
return $this->triggerAsync(["#server-to-user-$user_id"], $event, $data, [], $already_encoded);
}
/**
* @deprecated in favour of of trigger and triggerAsync
*/
public function make_batch_request(array $batch = [], bool $already_encoded = false): Request
{
foreach ($batch as $key => $event) {
$this->validate_channel($event['channel']);
if (isset($event['socket_id'])) {
$this->validate_socket_id($event['socket_id']);
}
$data = $event['data'];
if (!is_string($data)) {
try {
$data = $already_encoded ? $data : json_encode($data, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
if (PusherCrypto::is_encrypted_channel($event['channel'])) {
$batch[$key]['data'] = $this->crypto->encrypt_payload($event['channel'], $data);
} else {
$batch[$key]['data'] = $data;
}
}
$post_params = [];
$post_params['batch'] = $batch;
try {
$post_value = json_encode($post_params, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
$query_params = [];
$query_params['body_md5'] = md5($post_value);
$path = $this->settings['base_path'] . '/batch_events';
$signature = $this->sign($path, 'POST', $query_params);
$this->log('trigger POST: {post_value}', compact('post_value'));
$headers = [
'Content-Type' => 'application/json',
'X-Pusher-Library' => 'pusher-http-php ' . self::$VERSION
];
$params = array_merge($signature, $query_params);
$query_string = self::array_implode('=', '&', $params);
$full_path = $path . "?" . $query_string;
return new Request('POST', $full_path, $headers, $post_value);
}
/**
* Trigger multiple events at the same time.
*
* @param array $batch [optional] An array of events to send
* @param bool $already_encoded [optional]
*
* @return object
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
* @throws PusherException
*/
public function triggerBatch(array $batch = [], bool $already_encoded = false): object
{
$post_value = $this->make_trigger_batch_body($batch, $already_encoded);
$this->log('trigger POST: {post_value}', compact('post_value'));
return $this->process_trigger_result($this->post('/batch_events', $post_value));
}
/**
* Asynchronously trigger multiple events at the same time.
*
* @param array $batch [optional] An array of events to send
* @param bool $already_encoded [optional]
*
* @return PromiseInterface
* @throws PusherException
*/
public function triggerBatchAsync(array $batch = [], bool $already_encoded = false): PromiseInterface
{
$post_value = $this->make_trigger_batch_body($batch, $already_encoded);
$this->log('trigger POST: {post_value}', compact('post_value'));
return $this->postAsync('/batch_events', $post_value)->then(function ($result) {
return $this->process_trigger_result($result);
});
}
/**
* Terminates all connections established by the user with the given user id.
*
* @param string $user_id
*
* @throws PusherException If $user_id is invalid
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
*
* @return object response body
*
*/
public function terminateUserConnections(string $user_id): object
{
$this->validate_user_id($user_id);
return $this->post("/users/$user_id/terminate_connections", "{}");
}
/**
* Asynchronous request to terminates all connections established by the user with the given user id.
*
* @param string $user_id
*
* @throws PusherException If $userId is invalid
*
* @return PromiseInterface promise wrapping response body
*
*/
public function terminateUserConnectionsAsync(string $user_id): PromiseInterface
{
$this->validate_user_id($user_id);
return $this->postAsync("/users/$user_id/terminate_connections", "{}");
}
/**
* Fetch channel information for a specific channel.
*
* @param string $channel The name of the channel
* @param array $params Additional parameters for the query e.g. $params = array( 'info' => 'connection_count' )
*
* @throws PusherException If $channel is invalid
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
*
*/
public function getChannelInfo(string $channel, array $params = []): object
{
$this->validate_channel($channel);
return $this->get('/channels/' . $channel, $params);
}
/**
* @deprecated in favour of getChannelInfo
*/
public function get_channel_info(string $channel, array $params = []): object
{
return $this->getChannelInfo($channel, $params);
}
/**
* Fetch a list containing all channels.
*
* @param array $params Additional parameters for the query e.g. $params = array( 'info' => 'connection_count' )
*
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
*
*/
public function getChannels(array $params = []): object
{
$result = $this->get('/channels', $params);
$result->channels = get_object_vars($result->channels);
return $result;
}
/**
* @deprecated in favour of getChannels
*/
public function get_channels(array $params = []): object
{
return $this->getChannels($params);
}
/**
* Fetch user ids currently subscribed to a presence channel.
*
* @param string $channel The name of the channel
*
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
*
*/
public function getPresenceUsers(string $channel): object
{
return $this->get('/channels/' . $channel . '/users');
}
/**
* @deprecated in favour of getPresenceUsers
*/
public function get_users_info(string $channel): object
{
return $this->getPresenceUsers($channel);
}
/**
* GET arbitrary REST API resource using a synchronous http client.
* All request signing is handled automatically.
*
* @param string $path Path excluding /apps/APP_ID
* @param array $params API params (see http://pusher.com/docs/rest_api)
* @param bool $associative When true, return the response body as an associative array, else return as an object
*
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
* @throws PusherException
*
* @return mixed See Pusher API docs
*/
public function get(string $path, array $params = [], $associative = false)
{
$path = $this->settings['base_path'] . $path;
$signature = $this->sign($path, 'GET', $params);
$headers = [
'Content-Type' => 'application/json',
'X-Pusher-Library' => 'pusher-http-php ' . self::$VERSION
];
$response = $this->client->get(ltrim($path, '/'), [
'query' => $signature,
'http_errors' => false,
'headers' => $headers,
'base_uri' => $this->channels_url_prefix(),
'timeout' => $this->settings['timeout']
]);
$status = $response->getStatusCode();
if ($status !== 200) {
$body = (string) $response->getBody();
throw new ApiErrorException($body, $status);
}
try {
$body = json_decode($response->getBody(), $associative, 512, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data decoding error.');
}
return $body;
}
/**
* POST arbitrary REST API resource using a synchronous http client.
* All request signing is handled automatically.
*
* @param string $path Path excluding /apps/APP_ID
* @param mixed $body Request payload (see http://pusher.com/docs/rest_api)
* @param array $params API params (see http://pusher.com/docs/rest_api)
*
* @throws ApiErrorException Throws ApiErrorException if the Channels HTTP API responds with an error
* @throws GuzzleException
* @throws PusherException
*
* @return mixed Post response body
*/
public function post(string $path, $body, array $params = [])
{
$path = $this->settings['base_path'] . $path;
$params['body_md5'] = md5($body);
$params_with_signature = $this->sign($path, 'POST', $params);
$headers = [
'Content-Type' => 'application/json',
'X-Pusher-Library' => 'pusher-http-php ' . self::$VERSION
];
try {
$response = $this->client->post(ltrim($path, '/'), [
'query' => $params_with_signature,
'body' => $body,
'http_errors' => false,
'headers' => $headers,
'base_uri' => $this->channels_url_prefix(),
'timeout' => $this->settings['timeout']
]);
} catch (ConnectException $e) {
throw new ApiErrorException($e->getMessage());
}
$status = $response->getStatusCode();
if ($status !== 200) {
$body = (string) $response->getBody();
throw new ApiErrorException($body, $status);
}
try {
$response_body = json_decode($response->getBody(), false, 512, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data decoding error.');
}
return $response_body;
}
/**
* Asynchronously POST arbitrary REST API resource using a synchronous http client.
* All request signing is handled automatically.
*
* @param string $path Path excluding /apps/APP_ID
* @param mixed $body Request payload (see http://pusher.com/docs/rest_api)
* @param array $params API params (see http://pusher.com/docs/rest_api)
*
* @return PromiseInterface Promise wrapping POST response body
*/
public function postAsync(string $path, $body, array $params = []): PromiseInterface
{
$path = $this->settings['base_path'] . $path;
$params['body_md5'] = md5($body);
$params_with_signature = $this->sign($path, 'POST', $params);
$headers = [
'Content-Type' => 'application/json',
'X-Pusher-Library' => 'pusher-http-php ' . self::$VERSION
];
return $this->client->postAsync(ltrim($path, '/'), [
'query' => $params_with_signature,
'body' => $body,
'http_errors' => false,
'headers' => $headers,
'base_uri' => $this->channels_url_prefix(),
'timeout' => $this->settings['timeout'],
])->then(function ($response) {
$status = $response->getStatusCode();
if ($status !== 200) {
$body = (string) $response->getBody();
throw new ApiErrorException($body, $status);
}
try {
$response_body = json_decode($response->getBody(), false, 512, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data decoding error.');
}
return $response_body;
}, function (ConnectException $e) {
throw new ApiErrorException($e->getMessage());
});
}
/**
* Creates a user authentication signature.
*
* @param string $socket_id
* @param array $user_data
*
* @return string Json encoded authentication string.
* @throws PusherException Throws exception if $channel is invalid or above or $socket_id is invalid
*/
public function authenticateUser(string $socket_id, array $user_data): string
{
$this->validate_socket_id($socket_id);
$this->validate_user_data($user_data);
$serialized_user_data = json_encode($user_data, JSON_THROW_ON_ERROR);
$signature = hash_hmac('sha256', "$socket_id::user::$serialized_user_data", $this->settings['secret'], false);
$auth = $this->settings['auth_key'] . ':' . $signature;
return json_encode(
['auth' => $auth, 'user_data' => $serialized_user_data],
JSON_THROW_ON_ERROR
);
}
/**
* Creates a channel authorization signature.
*
* @param string $channel
* @param string $socket_id
* @param string|null $custom_data
*
* @return string Json encoded authentication string.
* @throws PusherException Throws exception if $channel is invalid or above or $socket_id is invalid
*/
public function authorizeChannel(string $channel, string $socket_id, string $custom_data = null): string
{
$this->validate_channel($channel);
$this->validate_socket_id($socket_id);
if ($custom_data) {
$signature = hash_hmac('sha256', $socket_id . ':' . $channel . ':' . $custom_data, $this->settings['secret'], false);
} else {
$signature = hash_hmac('sha256', $socket_id . ':' . $channel, $this->settings['secret'], false);
}
$signature = ['auth' => $this->settings['auth_key'] . ':' . $signature];
// add the custom data if it has been supplied
if ($custom_data) {
$signature['channel_data'] = $custom_data;
}
if (PusherCrypto::is_encrypted_channel($channel)) {
if (!is_null($this->crypto)) {
$signature['shared_secret'] = base64_encode($this->crypto->generate_shared_secret($channel));
} else {
throw new PusherException('You must specify an encryption master key to authorize an encrypted channel');
}
}
try {
$response = json_encode($signature, JSON_THROW_ON_ERROR | JSON_UNESCAPED_SLASHES);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
return $response;
}
/**
* Convenience function for presence channel authorization.
*
* Equivalent to authorizeChannel($channel, $socket_id, json_encode(['user_id' => $user_id, 'user_info' => $user_info], JSON_THROW_ON_ERROR))
*
* @param string $channel
* @param string $socket_id
* @param string $user_id
* @param mixed $user_info
*
* @return string
* @throws PusherException Throws exception if $channel is invalid or above or $socket_id is invalid
*/
public function authorizePresenceChannel(string $channel, string $socket_id, string $user_id, $user_info = null): string
{
$user_data = ['user_id' => $user_id];
if ($user_info) {
$user_data['user_info'] = $user_info;
}
try {
return $this->authorizeChannel($channel, $socket_id, json_encode($user_data, JSON_THROW_ON_ERROR));
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
/**
* @deprecated in favour of authorizeChannel
*/
public function socketAuth(string $channel, string $socket_id, string $custom_data = null): string
{
return $this->authorizeChannel($channel, $socket_id, $custom_data);
}
/**
* @deprecated in favour of authorizeChannel
*/
public function socket_auth(string $channel, string $socket_id, string $custom_data = null): string
{
return $this->authorizeChannel($channel, $socket_id, $custom_data);
}
/**
* @deprecated in favour of authorizePresenceChannel
*/
public function presenceAuth(string $channel, string $socket_id, string $user_id, $user_info = null): string
{
return $this->authorizePresenceChannel($channel, $socket_id, $user_id, $user_info);
}
/**
* @deprecated in favour of authorizePresenceChannel
*/
public function presence_auth(string $channel, string $socket_id, string $user_id, $user_info = null): string
{
return $this->authorizePresenceChannel($channel, $socket_id, $user_id, $user_info);
}
/**
* Verify that a webhook actually came from Pusher, decrypts any encrypted events, and marshals them into a PHP object.
*
* @param array $headers a array of headers from the request (for example, from getallheaders())
* @param string $body the body of the request (for example, from file_get_contents('php://input'))
*
* @throws PusherException
*
* @return Webhook marshalled object with the properties time_ms (an int) and events (an array of event objects)
*/
public function webhook(array $headers, string $body): object
{
$this->verifySignature($headers, $body);
$decoded_events = [];
try {
$decoded_json = json_decode($body, false, 512, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
$this->log('Unable to decrypt webhook event payload.', null, LogLevel::WARNING);
throw new PusherException('Data encoding error.');
}
foreach ($decoded_json->events as $event) {
if (PusherCrypto::is_encrypted_channel($event->channel)) {
if (!is_null($this->crypto)) {
$decryptedEvent = $this->crypto->decrypt_event($event);
if ($decryptedEvent === false) {
$this->log('Unable to decrypt webhook event payload. Wrong key? Ignoring.', null, LogLevel::WARNING);
continue;
}
$decoded_events[] = $decryptedEvent;
} else {
$this->log('Got an encrypted webhook event payload, but no master key specified. Ignoring.', null, LogLevel::WARNING);
}
} else {
$decoded_events[] = $event;
}
}
return new Webhook($decoded_json->time_ms, $decoded_events);
}
/**
* Verify that a given Pusher Signature is valid.
*
* @param array $headers an array of headers from the request (for example, from getallheaders())
* @param string $body the body of the request (for example, from file_get_contents('php://input'))
*
* @throws PusherException if signature is incorrect.
*/
public function verifySignature(array $headers, string $body): void
{
$x_pusher_key = $headers['X-Pusher-Key'];
$x_pusher_signature = $headers['X-Pusher-Signature'];
if ($x_pusher_key === $this->settings['auth_key']) {
$expected = hash_hmac('sha256', $body, $this->settings['secret']);
if ($expected === $x_pusher_signature) {
return;
}
}
throw new PusherException(sprintf('Received WebHook with invalid signature: got %s.', $x_pusher_signature));
}
/**
* @deprecated in favour of verifySignature
*/
public function ensure_valid_signature(array $headers, string $body): void
{
$this->verifySignature($headers, $body);
}
/**
* Returns an event represented by an associative array to be used in creating events and batch_events requests
*
* @param array|string $channels A channel name or an array of channel names to publish the event on.
* @param string $event
* @param mixed $data Event data
* @param array $params [optional]
* @param bool $already_encoded [optional]
*
* @throws PusherException
*
* @return array Event associative array
*/
private function make_event(array $channels, string $event, $data, array $params = [], ?string $info = null, bool $already_encoded = false): array
{
$has_encrypted_channel = false;
foreach ($channels as $chan) {
if (PusherCrypto::is_encrypted_channel($chan)) {
$has_encrypted_channel = true;
break;
}
}
if ($has_encrypted_channel) {
if (PusherCrypto::has_mixed_channels($channels)) {
throw new PusherException('You cannot trigger to encrypted and non-encrypted channels at the same time');
} else {
try {
$data_encoded = $this->crypto->encrypt_payload(
$channels[0],
$already_encoded ? $data : json_encode($data, JSON_THROW_ON_ERROR)
);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
} else {
try {
$data_encoded = $already_encoded ? $data : json_encode($data, JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
// json_encode might return false on failure
if (!$data_encoded) {
$this->log('Failed to perform json_encode on the the provided data: {error}', [
'error' => print_r($data, true),
], LogLevel::ERROR);
}
$post_params = [];
$post_params['name'] = $event;
$post_params['data'] = $data_encoded;
$channel_values = array_values($channels);
if (count($channel_values) == 1) {
$post_params['channel'] = $channel_values[0];
} else {
$post_params['channels'] = $channel_values;
}
if (!is_null($info)) {
$post_params['info'] = $info;
}
return array_merge($post_params, $params);
}
/**
* Returns the body of a trigger events request serialized as string ready to be sent in a request
*
* @param array|string $channels A channel name or an array of channel names to publish the event on.
* @param string $event
* @param mixed $data Event data
* @param array $params [optional]
* @param bool $already_encoded [optional]
*
* @throws PusherException
*
* @return string
*/
private function make_trigger_body($channels, string $event, $data, array $params = [], bool $already_encoded = false): string
{
if (is_string($channels) === true) {
$channels = [$channels];
}
$this->validate_channels($channels);
if (isset($params['socket_id'])) {
$this->validate_socket_id($params['socket_id']);
}
try {
return json_encode(
$this->make_event($channels, $event, $data, $params, null, $already_encoded),
JSON_THROW_ON_ERROR
);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
/**
* Returns the body of a trigger batch events request serialized as string ready to be sent in a request
*
* @param array|string $channels A channel name or an array of channel names to publish the event on.
* @param string $event
* @param mixed $data Event data
* @param array $params [optional]
* @param bool $already_encoded [optional]
*
* @throws PusherException
*
* @return string
*/
private function make_trigger_batch_body(array $batch = [], bool $already_encoded = false): string
{
foreach ($batch as $key => $event) {
$this->validate_channel($event['channel']);
if (isset($event['socket_id'])) {
$this->validate_socket_id($event['socket_id']);
$batch[$key] = $this->make_event([$event['channel']], $event['name'], $event['data'], ['socket_id' => $event['socket_id']], $event['info'] ?? null, $already_encoded);
} else {
$batch[$key] = $this->make_event([$event['channel']], $event['name'], $event['data'], [], $event['info'] ?? null, $already_encoded);
}
}
try {
return json_encode(['batch' => $batch], JSON_THROW_ON_ERROR);
} catch (\JsonException $e) {
throw new PusherException('Data encoding error.');
}
}
/**
* Mutates the result of a trigger (batch) request to replace channel names with channel objects
*
* @param object $result result of the trigger (batch) request
*
* @return object
*/
private function process_trigger_result(object $result): object
{
if (property_exists($result, 'channels') && is_object($result->channels)) {
$result->channels = get_object_vars($result->channels);
}
return $result;
}
private function validate_user_data(array $user_data): void
{
if (is_null($user_data)) {
throw new PusherException('user_data is null');
}
if (!array_key_exists('id', $user_data)) {
throw new PusherException('user_data has no id field');
}
$this->validate_user_id($user_data['id']);
}
}
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