Go Requires Chilkat v10.1.2+

Shopify OAuth2 Authentication

See more OAuth2 Examples

This example shows how to obtain an initial access token for a Shopify application using OAuth2 authentication specifically for non-web applications. This process requires displaying a browser window to secure user authorization. In contrast, web-based applications use a different method to obtain an OAuth2 token, as they redirect back to the application via a URL. Note: Once you have the access token, all subsequent Chilkat examples that rely on an already-obtained token are applicable to both web and non-web applications. Go

    success := false

    //  To further clarify, see OAuth 2.0 Authorization Flow

    oauth2 := chilkat.NewOAuth2()

    //  This should be the port in the localhost callback URL for your app.  
    //  The callback URL would look like "http://localhost:3017/" if the port number is 3017.
    //  Make sure that "http://localhost:3017/" is listed in your Whitelisted Redirection URLs for your Shopify app.
    oauth2.SetListenPort(3017)

    //  The full content of the Authorization Endpoin for Shopify looks like this:
    //  https://{shop}.myshopify.com/admin/oauth/authorize?client_id={api_key}&scope={scopes}&redirect_uri={redirect_uri}&state={nonce}&grant_options[]={option}

    //  Replace "chilkat" with your shop name.
    oauth2.SetAuthorizationEndpoint("https://chilkat.myshopify.com/admin/oauth/authorize")
    oauth2.SetTokenEndpoint("https://chilkat.myshopify.com/admin/oauth/access_token")

    //  Replace this with your actual API KEY (client ID)
    oauth2.SetClientId("SHOPIFY_API_KEY")

    //  This is for Require Proof Key for Code Exchange (PKCE)
    //  See OAuth2 PKCE Explained
    oauth2.SetCodeChallenge(true)
    oauth2.SetCodeChallengeMethod("S256")

    //  Set requested scopes.  See https://help.shopify.com/api/getting-started/authentication/oauth
    oauth2.SetScope("read_product_listings,read_customers,read_orders,read_draft_orders")

    //  Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
    url := oauth2.StartAuth()
    if oauth2.LastMethodSuccess() != true {
        fmt.Println(oauth2.LastErrorText())
        oauth2.DisposeOAuth2()
        return
    }

    //  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 {
        fmt.Println(oauth2.LastErrorText())
        oauth2.DisposeOAuth2()
        return
    }

    //  Wait for the user to approve or deny authorization in the browser.
    numMsWaited := 0
    for (numMsWaited < 90000) && (oauth2.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.AuthFlowState() < 3 {
        oauth2.Cancel()
        fmt.Println("No response from the browser!")
        oauth2.DisposeOAuth2()
        return
    }

    //  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.AuthFlowState() == 5 {
        fmt.Println("OAuth2 failed to complete.")
        fmt.Println(oauth2.FailureInfo())
        oauth2.DisposeOAuth2()
        return
    }

    if oauth2.AuthFlowState() == 4 {
        fmt.Println("OAuth2 authorization was denied.")
        fmt.Println(oauth2.AccessTokenResponse())
        oauth2.DisposeOAuth2()
        return
    }

    if oauth2.AuthFlowState() != 3 {
        fmt.Println("Unexpected AuthFlowState:", oauth2.AuthFlowState())
        oauth2.DisposeOAuth2()
        return
    }

    fmt.Println("OAuth2 authorization granted!")
    fmt.Println("Access Token = ", oauth2.AccessToken())

    //  Save the full JSON access token response to a file.
    sbJson := chilkat.NewStringBuilder()
    sbJson.Append(oauth2.AccessTokenResponse())
    sbJson.WriteFile("qa_data/tokens/shopify-access-token.json","utf-8",false)

    //  The saved JSON response looks like this:

    //  {
    //    "access_token": "1364e43a5332583188cb27bc85469b1f",
    //    "scope": "read_product_listings,read_customers,read_orders,read_draft_orders"
    //  }

    oauth2.DisposeOAuth2()
    sbJson.DisposeStringBuilder()