Invalid lambda function output : invalid json

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Invalid Lambda Function Output: Invalid JSON

When working with Lambda functions, it is important to ensure that your function’s output is a valid JSON. This is because Lambda expects the response from your function to be a valid JSON object, which is then sent back to the client or another service.

JSON, or JavaScript Object Notation, is a lightweight data interchange format that is easy for humans to read and write and easy for machines to parse and generate. It follows a simple key-value pair structure and is widely used for transmitting data between a server and web application, as well as storing configuration or data settings.

An invalid JSON response from a Lambda function can occur due to various reasons, such as:

  1. Missing or incorrect formatting of the JSON object.
  2. Missing or misnamed keys or values within the JSON object.
  3. Improperly escaped special characters within the JSON object.
  4. Using unsupported data types or formats within the JSON object.

Let’s take a look at an example of an invalid JSON response: 

{
    "name": "John Doe"
    "age": 30,
    "email": "johndoe@example.com"
}

In this example, there is a missing comma (,) after the “name” key, resulting in an invalid JSON object. To fix this issue, you need to ensure that the JSON is correctly formatted: 

{
    "name": "John Doe",
    "age": 30,
    "email": "johndoe@example.com"
}

It is also a good practice to validate your JSON response before sending it back from your Lambda function. You can use various JSON validator tools or libraries in your programming language of choice to validate the structure and correctness of your JSON response.

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