Connecting Xano App to a SOAP API Using JavaScript with Lambdas

I've been having some challenges connecting my Xano app to a SOAP API that I need to use. After some research and considering various third-party services like Make, I realized that this can be achieved using JavaScript within an AWS Lambda function.

Here’s a simple example of how you can set up a Lambda function to interact with a SOAP API. In this case, I’m using the SOAP API provided by Postman:

Lambda Function Code:

async function fetchNumberToWords() {
  const url = "https://www.dataaccess.com/webservicesserver/NumberConversion.wso";
  const soapRequest = `<?xml version="1.0" encoding="utf-8"?>
  <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
    <soap:Body>
      <NumberToWords xmlns="http://www.dataaccess.com/webservicesserver/">
        <ubiNum>500</ubiNum>
      </NumberToWords>
    </soap:Body>
  </soap:Envelope>`;

  try {
    const response = await fetch(url, {
      method: "POST",
      headers: {
        "Content-Type": "text/xml",
        "SOAPAction": "http://www.dataaccess.com/webservicesserver/NumberToWords",
      },
      body: soapRequest,
    });

    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

    const data = await response.text();
    console.log("Response:", data);
    return data; // return the result after the fetch completes
  } catch (error) {
    console.error("Error:", error);
    return "Error occurred";
  }
}

// Usage example
return await fetchNumberToWords();

Explanation:

SOAP Request Setup: We create a SOAP request payload to send to the API.
Fetch API Call: The fetch function sends a POST request to the SOAP API with the necessary headers and body.
Error Handling: Checks if the response is OK and handles any errors that might occur.

Response Example:

The lambda function will return a response similar to this:

<?xml version="1.0" encoding="utf-8"?> <soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"> <soap:Body> <m:NumberToWordsResponse xmlns:m="http://www.dataaccess.com/webservicesserver/"> <m:NumberToWordsResult>five hundred</m:NumberToWordsResult> </m:NumberToWordsResponse> </soap:Body> </soap:Envelope>

Notes:

Ensure you configure your Lambda function to handle the parameters and responses appropriately for your API integration.
While this example uses fetch, you can achieve the same result using Axios if you prefer.

Hope this helps!