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Connect Amazon S3 NDJSON file and Amazon S3 CSV file in our serverless environment

Use this template to Read NDJSON file entries from Amazon S3 bucket using them to create CSV file entries in Amazon S3 Bucket.

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Read NDJSON file entries from Amazon S3 bucket

Used integrations:
class AwsS3SourceReadRemoteNdjson {
async init() {
// TODO: Create your aws-s3 credential
// More info at https://yepcode.io/docs/integrations/aws-s3/#credential-configuration
this.awsS3 = yepcode.integration.awsS3("your-aws-s3-credential-name");
}

async fetch(publish, done) {
// TODO: Customize the command to be executed
// More info at: https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/clients/client-s3/interfaces/getobjectcommandinput.html
const getObjectCommand = new GetObjectCommand({
Bucket: "your-bucket-name",
Key: "your-file-name",
});

const getObjectResult = await this.awsS3.send(getObjectCommand);

getObjectResult.body
.pipe(ndjson.parse())
.on("data", async (line) => {
await publish(line);
})
.on("end", done);
}

async close() {}
}

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Create CSV file entries in Amazon S3 Bucket

Used integrations:
class AwsS3TargetUploadCsv {
async init() {
// TODO: Create your aws-s3 credential
// More info at https://yepcode.io/docs/integrations/aws-s3/#credential-configuration
this.awsS3 = yepcode.integration.awsS3("your-aws-s3-credential-name");
// Transforms the items into a csv format
this.stringifier = csv.stringify({
delimiter: ",",
});
this.targetStream = new PassThrough();
this.stringifier.pipe(this.targetStream);
// TODO: customize the Upload content
// More info at: https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/interfaces/_aws_sdk_lib_storage.options-1.html
this.upload = new Upload({
client: this.awsS3,
params: {
Bucket: "your-bucket-name",
Key: "your-file-name.csv",
Body: this.targetStream,
},
});
this.upload.on("httpUploadProgress", (progress) => {
console.log(`Upload progress`, progress);
});
this.uploadPromise = this.upload.done();
}

async consume(item) {
// TODO: customize the csv row to create from your item content
const csvRow = [item.value, item.text];
this.stringifier.write(csvRow);
}

async close() {
try {
this.stringifier.end();
} catch (error) {
console.error(`Error ending stringifier`, error);
}
try {
await this.uploadPromise;
} catch (error) {
console.error(`Error ending upload`, error);
}
}
}

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