Connecting to GraphQL

Set the following to connect:

• URL: Specify the URL of the GraphQL service, for example https://api.example.com/graphql.
• Location: Set this to the file path containing any custom defined schemas for the GraphQL service.

Authenticating to GraphQL

The driver supports the following types of authentication:

• Basic
• OAuth 1.0 & 2.0
• OAuthPKCE
• AWS Cognito Credentials:
  • AwsCognitoSrp
  • AwsCognitoBasic

Basic

Set AuthScheme to Basic. You must specify the User and Password of the GraphQL service.

OAuth

In all OAuth flows, you must set AuthScheme to OAuth and OAuthVersion to 1.0 or 2.0. The following sections assume you have done so.

Headless Machines

To create GraphQL data sources on headless servers or other machines on which the adapter cannot open a browser, you need to authenticate from another machine. Authentication is a two-step process.

1. Choose one of two options:
   • Option 1: Obtain the OAuthVerifier value as described in "Obtain and Exchange a Verifier Code" below.
   • Option 2: Install the adapter on a machine with an internet browser and transfer the OAuth authentication values after you authenticate through the usual browser-based flow, as described in "Transfer OAuth Settings" below.
2. Then configure the adapter to automatically refresh the access token on the headless machine.

Option 1: Obtain and Exchange a Verifier Code

Set the following properties on the headless machine:

• InitiateOAuth: Set this to OFF.
• OAuthClientId: Set this to the application Id in your application settings.
• OAuthClientSecret: Set this to the application secret in your application settings.

You can then follow the steps below to authenticate from another machine and obtain the OAuthVerifier connection property.

1. Call the GetOAuthAuthorizationURL stored procedure with the CallbackURL input parameter set to the exact Redirect URI you specified in your application settings.
2. Save the value of the returned AuthToken and AuthKey if OAuthVersion is set to 1.0. They are used in the next step.
3. Open the returned URL in a browser. Log in and grant permissions to the adapter. You are then redirected to the callback URL, which contains the verifier code.
4. Save the value of the verifier code. Later, you must set this in the OAuthVerifier connection property.

On the headless machine, set the following connection properties to obtain the OAuth authentication values:

• OAuthRequestTokenURL: Required for OAuth 1.0. In OAuth 1.0 this is the URL where the application makes a request for the request token.
• OAuthAuthorizationURL: Required for OAuth 1.0 and 2.0. This is the URL where the user logs into the service and grants permissions to the application. In OAuth 1.0 if permissions are granted the request token is authorized.
• OAuthAccessTokenURL: Required for OAuth 1.0 and 2.0. This is the URL where the request for the access token is made. In OAuth 1.0 the authorized request token is exchanged for the access token.
• OAuthRefreshTokenURL: Required for OAuth 2.0. In OAuth 2.0 this is the URL where the refresh token is exchanged for a new access token when the old one expires. Note that for your data source this may be the same as the access token URL.
• OAuthClientId: Set this to the client Id in your application settings.
• OAuthClientSecret: Set this to the client secret in your application settings.
• CallbackURL: Set this to http://localhost:33333. If you specified a redirect URL in your application settings, this must match.
• InitiateOAuth: Set this to GETANDREFRESH. You can use InitiateOAuth to avoid repeating the OAuth exchange and manually setting the access token in the connection string.

Connect to Data

After the OAuth settings file is generated, set the following properties to connect to data:

• OAuthSettingsLocation: Set this to the file containing the encrypted OAuth authentication values. Make sure this file gives read and write permissions to the provider to enable the automatic refreshing of the access token.
• InitiateOAuth: Set this to REFRESH.

Option 2: Transfer OAuth Settings

Follow the steps below to install the adapter on another machine, authenticate, and then transfer the resulting OAuth values.

On a second machine, install the adapter and connect with the following properties set:

• OAuthSettingsLocation: Set this to a writable text file.
• InitiateOAuth: Set this to GETANDREFRESH.
• OAuthClientId: Set this to the Client Id in your application settings.
• OAuthClientSecret: Set this to the Client Secret in your application settings.
• CallbackURL: Set this to the Callback URL in your application settings.

Test the connection to authenticate. The resulting authentication values are written, encrypted, to the path specified by OAuthSettingsLocation. After you have successfully tested the connection, copy the OAuth settings file to your headless machine. On the headless machine, set the following connection properties to connect to data:

• InitiateOAuth: Set this to REFRESH.
• OAuthSettingsLocation: Set this to the path to your OAuth settings file. Make sure this file gives read and write permissions to the adapter to enable the automatic refreshing of the access token.

OAuthPKCE

NOTE:OAuth Proof Key for Code Exchange (PKCE) is an extension to the OAuth 2.0 Authorization Code flow.

AWS Cognito Credentials

If you want to use the adapter with a user registered in a User Pool in AWS Cognito, set the following properties to authenticate:

• AuthScheme: Set this to AwsCognitoSrp (recommended). You can also use AwsCognitoBasic.
• AWSCognitoRegion: Set this to the region of the User Pool.
• AWSUserPoolId: Set this to the User Pool Id.
• AWSUserPoolClientAppId: Set this to the User Pool Client App Id.
• AWSUserPoolClientAppSecret: Set this to the User Pool Client Secret.
• AWSIdentityPoolId: Set this to the Identity Pool Id of the Identity Pool that is linked with the User Pool.
• User: Set this to the username of the user registered in the User Pool.
• Password: Set this to the password of the user registered in the User Pool.