如何在 AWS Lambda 上讀取和寫入 QR Code

using Amazon.Lambda.Core;
using Amazon.S3;
using Amazon.S3.Model;
using IronQr;

// Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class.
[assembly: LambdaSerializer(typeof(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))]

namespace IronQrNuGetAwsLambda;

public class Function
{
    private static readonly IAmazonS3 _s3Client = new AmazonS3Client(Amazon.RegionEndpoint.APSoutheast1);

    /// <param name="context">The ILambdaContext that provides methods for logging and describing the Lambda environment.</param>
    /// <returns></returns>
    public async Task FunctionHandler(ILambdaContext context)
    {
        IronQr.License.LicenseKey = "IronQR-MYLICENSE-KEY-1EF01";

        string bucketName = "deploymenttestbucket";
        string objectKey = $"IronQrNuget/{Guid.NewGuid()}.png";

        try
        {
            // Creating a qr is as simple as:
            var myQr = QrWriter.Write("12345");

            context.Logger.LogLine($"QR created.");

            // Upload the JPG to S3
            await UploadJpgToS3Async(bucketName, objectKey, myQr.Save().ExportBytesAsJpg());

            context.Logger.LogLine($"QR uploaded successfully to {bucketName}/{objectKey}");

            // Load the asset into QrImageInput
            QrImageInput imageInput = new QrImageInput(myQr.Save());

            // Create a QR Reader object
            QrReader reader = new QrReader();

            var resultFromByte = reader.Read(imageInput);

            foreach (var item in resultFromByte)
            {
                // Log the read value out
                context.Logger.LogLine($"QR value is = {item.Value}");
            }
        }
        catch (Exception e)
        {
            context.Logger.LogLine($"[ERROR] FunctionHandler: {e.Message}");
        }
    }
    // Function to upload the JPG file to S3
    private async Task UploadJpgToS3Async(string bucketName, string objectKey, byte[] pdfBytes)
    {
        using (var memoryStream = new MemoryStream(pdfBytes))
        {
            var request = new PutObjectRequest
            {
                BucketName = bucketName,
                Key = objectKey,
                InputStream = memoryStream,
                ContentType = "image/jpg",
            };

            await _s3Client.PutObjectAsync(request);
        }
    }
}

Imports Amazon.Lambda.Core
Imports Amazon.S3
Imports Amazon.S3.Model
Imports IronQr

' Assembly attribute to enable the Lambda function's JSON input to be converted into a .NET class.
<Assembly: LambdaSerializer(GetType(Amazon.Lambda.Serialization.SystemTextJson.DefaultLambdaJsonSerializer))>

Namespace IronQrNuGetAwsLambda

	Public Class [Function]
		Private Shared ReadOnly _s3Client As IAmazonS3 = New AmazonS3Client(Amazon.RegionEndpoint.APSoutheast1)

		''' <param name="context">The ILambdaContext that provides methods for logging and describing the Lambda environment.</param>
		''' <returns></returns>
		Public Async Function FunctionHandler(ByVal context As ILambdaContext) As Task
			IronQr.License.LicenseKey = "IronQR-MYLICENSE-KEY-1EF01"

			Dim bucketName As String = "deploymenttestbucket"
			Dim objectKey As String = $"IronQrNuget/{Guid.NewGuid()}.png"

			Try
				' Creating a qr is as simple as:
				Dim myQr = QrWriter.Write("12345")

				context.Logger.LogLine($"QR created.")

				' Upload the JPG to S3
				Await UploadJpgToS3Async(bucketName, objectKey, myQr.Save().ExportBytesAsJpg())

				context.Logger.LogLine($"QR uploaded successfully to {bucketName}/{objectKey}")

				' Load the asset into QrImageInput
				Dim imageInput As New QrImageInput(myQr.Save())

				' Create a QR Reader object
				Dim reader As New QrReader()

				Dim resultFromByte = reader.Read(imageInput)

				For Each item In resultFromByte
					' Log the read value out
					context.Logger.LogLine($"QR value is = {item.Value}")
				Next item
			Catch e As Exception
				context.Logger.LogLine($"[ERROR] FunctionHandler: {e.Message}")
			End Try
		End Function
		' Function to upload the JPG file to S3
		Private Async Function UploadJpgToS3Async(ByVal bucketName As String, ByVal objectKey As String, ByVal pdfBytes() As Byte) As Task
			Using memoryStream As New MemoryStream(pdfBytes)
				Dim request = New PutObjectRequest With {
					.BucketName = bucketName,
					.Key = objectKey,
					.InputStream = memoryStream,
					.ContentType = "image/jpg"
				}

				Await _s3Client.PutObjectAsync(request)
			End Using
		End Function
	End Class
End Namespace