(Perl) Slack OAuth2

See more OAuth2 Examples

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

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use chilkat();

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

$oauth2 = chilkat::CkOAuth2->new();

# 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() != 1) {
    print $oauth2->lastErrorText() . "\r\n";
    exit;
}

print "url = " . $url . "\r\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 == 0) {
    print $oauth2->lastErrorText() . "\r\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!" . "\r\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." . "\r\n";
    print $oauth2->failureInfo() . "\r\n";
    exit;
}

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

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

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

# Get the full JSON response:
$json = chilkat::CkJsonObject->new();
$json->Load($oauth2->accessTokenResponse());
$json->put_EmitCompact(0);

# 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() . "\r\n";

# Save the JSON to a file for future requests.
$fac = chilkat::CkFileAccess->new();
$fac->WriteEntireTextFile("qa_data/tokens/slack.json",$json->emit(),"utf-8",0);