Zalo User InteractInstall

Overview

This node operation, "Get QR Code Login," is designed to retrieve a QR code used for login purposes. It is particularly useful in scenarios where authentication via QR code scanning is required, such as logging into web services or applications that support QR code-based authentication flows.

Typical use cases include:

• Automating login processes that require scanning a QR code.
• Integrating with services that provide session initiation through QR codes.
• Facilitating user authentication without manual credential input by generating and retrieving the QR code image.

For example, this node can be used to fetch a QR code from a messaging platform's API, which the user then scans with their mobile device to authenticate the session.

Properties

Output

The node outputs JSON data containing the QR code information. The exact structure of the output JSON is not explicitly detailed in the source code snippet, but typically it would include:

• A field containing the QR code image data or a URL to the QR code.
• Metadata about the QR code or the login session (e.g., expiration time, session ID).

If binary data output is supported (e.g., the QR code image itself), it would represent the QR code image in a binary format suitable for further processing or display.

Dependencies

• The node requires an API key or authentication token configured in n8n credentials to authorize requests to the external service providing the QR code.
• Optionally, a proxy server configuration can be provided to route the request.
• The node depends on HTTP request capabilities to communicate with the external API endpoint that generates or provides the QR code.

Troubleshooting

Common Issues

• Invalid or missing API credentials: The node will fail to authenticate with the external service, resulting in errors. Ensure that valid credentials are set up in n8n.
• Network connectivity problems: If the proxy is misconfigured or unreachable, the node may fail to fetch the QR code.
• Expired or invalid QR code: The QR code retrieved might expire quickly; ensure timely usage after retrieval.
• Unexpected response format: Changes in the external API could cause parsing errors.

Error Messages and Resolutions

• Authentication errors: Check and update the API key or authentication token in the node credentials.
• Timeouts or connection refused: Verify proxy settings and network accessibility.
• Parsing errors: Confirm that the external API response format matches expectations; update the node or contact the API provider if changes occur.

Links and References

• QR Code Authentication Overview
• Using Proxies with HTTP Requests
• Relevant API documentation of the service providing the QR code (not specified here).