Middy sqs-json-body-parser middleware

🛵 middyjs middleware to parse your AWS SQS events' body! This middleware will add to the SQS message an additional field with the parsed body. If the event is not an SQS event, it will be ignored.

Install

npm i sqs-json-body-parser

Options

• throwOnFail (boolean): define if the middleware should ignore errors when parsing the body string. Default: true
• attachField (string): the name of the attached field. Default: jsonBody
• secureJson (json): customize the options passed to secure-json-parse. If null the JSON.parse will be used instead to parse the body. Default: null

⚠ secureJson may impact your Lambda performance! Use it only if the body input is not sanitized.

Usage

const middy = require('@middy/core')
const sqsJsonBodyParser = require('sqs-json-body-parser')

const handler = middy((event, context, cb) => {
  cb(null, event.Records)
})

handler.use(sqsJsonBodyParser({ throwOnFail: false }))

// invokes the handler
const event = {
  "Records": [
    {
      "messageId": "11d6ee51-4cc7-4302-9e22-7cd8afdaadf5",
      "receiptHandle": "AQEBBX8nesZEXmkhsmZeyIE8iQAMig7qw...",
      "body": "{\"test\": \"foo\"}",
      "attributes": {
        "ApproximateReceiveCount": "1",
        "SentTimestamp": "1573251510774",
        "SequenceNumber": "18849496460467696128",
        "MessageGroupId": "1",
        "SenderId": "AIDAIO23YVJENQZJOL4VO",
        "MessageDeduplicationId": "1",
        "ApproximateFirstReceiveTimestamp": "1573251510774"
      },
      "messageAttributes": {},
      "md5OfBody": "e4e68fb7bd0e697a0ae8f1bb342846b3",
      "eventSource": "aws:sqs",
      "eventSourceARN": "arn:aws:sqs:us-east-2:123456789012:fifo.fifo",
      "awsRegion": "us-east-2"
    }
  ]
}

handler(event, {}, (_, records) => {
  expect(records[0].jsonBody).toEqual({ test: 'foo' })
})

License

Licensed under MIT.