(PHP Extension) Slack OAuth2

See more OAuth2 Examples

Note: This example requires Chilkat v10.1.2 or greater.

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<?php

include("chilkat.php");
// Use "chilkat_9_5_0.php" for versions of Chilkat < 10.0.0

// For more information about the OAuth2, see OAuth 2.0 Authorization Flow

$oauth2 = new CkOAuth2();

// This example is for desktop applicatons (it is not for code that runs on a web server).

// Your applicaton must use your own public web server as an intermediate
// to receive and forward the redirect to localhost.
// See Using Your Web Server as an Intermediary for OAuth2 Redirect to localhost

// This is the Redirect URL defined for your Slack App in the Slack developer portal, and contains the above PHP.
$oauth2->put_AppCallbackUrl('https://yourwebserver.com/oauth2_redirect');
$oauth2->put_ListenPort(3017);

$oauth2->put_AuthorizationEndpoint('https://slack.com/oauth/authorize');
$oauth2->put_TokenEndpoint('https://slack.com/api/oauth.access');

// Replace these with actual values.
$oauth2->put_ClientId('CLIENT_ID');
$oauth2->put_ClientSecret('CLIENT_SECRET');

$oauth2->put_Scope('team:read users:read');

// Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
$url = $oauth2->startAuth();
if ($oauth2->get_LastMethodSuccess() != true) {
    print $oauth2->lastErrorText() . "\n";
    exit;
}

print 'url = ' . $url . "\n";

// Launch the default browser on the system and navigate to the url.
// The LaunchBrowser method was added in Chilkat v10.1.2.
$success = $oauth2->LaunchBrowser($url);
if ($success == false) {
    print $oauth2->lastErrorText() . "\n";
    exit;
}

// Wait for the user to approve or deny authorization in the browser.
$numMsWaited = 0;
while (($numMsWaited < 90000) and ($oauth2->get_AuthFlowState() < 3)) {
    $oauth2->SleepMs(100);
    $numMsWaited = $numMsWaited + 100;
}

// If the browser does not respond within the specified time, AuthFlowState will be:
// 
// 1: Waiting for Redirect - The OAuth2 background thread is waiting for the browser's redirect request.
// 2: Waiting for Final Response - The thread is awaiting the final access token response.
// In either case, cancel the background task initiated by StartAuth.

if ($oauth2->get_AuthFlowState() < 3) {
    $oauth2->Cancel();
    print 'No response from the browser!' . "\n";
    exit;
}

// Check AuthFlowState to determine if authorization was granted, denied, or failed:
// 
// 3: Success - OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
// 4: Access Denied - OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
// 5: Failure - OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

if ($oauth2->get_AuthFlowState() == 5) {
    print 'OAuth2 failed to complete.' . "\n";
    print $oauth2->failureInfo() . "\n";
    exit;
}

if ($oauth2->get_AuthFlowState() == 4) {
    print 'OAuth2 authorization was denied.' . "\n";
    print $oauth2->accessTokenResponse() . "\n";
    exit;
}

if ($oauth2->get_AuthFlowState() != 3) {
    print 'Unexpected AuthFlowState:' . $oauth2->get_AuthFlowState() . "\n";
    exit;
}

print 'OAuth2 authorization granted!' . "\n";
print 'Access Token = ' . $oauth2->accessToken() . "\n";

// Get the full JSON response:
$json = new CkJsonObject();
$json->Load($oauth2->accessTokenResponse());
$json->put_EmitCompact(false);

// The JSON response looks like this:

// {
//   "ok": true,
//   "access_token": "xoxp-348475395242-348621810805-4768936228341-9f512b295124e7c9846ce63cb1464c4d",
//   "scope": "identify,team:read,users:read",
//   "user_id": "UA8HZRUPP",
//   "team_id": "TA3DZBN74",
//   "enterprise_id": null,
//   "team_name": "Chilkat Testing"
// }

print $json->emit() . "\n";

// Save the JSON to a file for future requests.
$fac = new CkFileAccess();
$fac->WriteEntireTextFile('qa_data/tokens/slack.json',$json->emit(),'utf-8',false);

?>