CODEWITHSUNDEEP
python-3.xamazon-web-servicesaws-lambdaaws-api-gateway
Zyie
Zyie

Reputation: 154

Sending and reading data to AWS Lambda function

So i have setup a lambda function to upload a txt file to S3. How do i send data to the function using API Gateway?

Ive setup API Gateway to have a POST method.

here is my Lambda function

import boto3

s3 = boto3.resource('s3')

def lambda_handler(event, context):

    data = 'Totally awesome sword design' #event['data']

    filename = 'awesomeSword2' #event['filename']

    object = s3.Object(BUCKET_NAME, KEY + filename + '.txt')
    object.put(Body=data)

I just need to know how to send data and filename to the function (and read it)

Upvotes: 4

Views: 9770

Answers (4)

Vishal
Vishal

Reputation: 34

Can also use APIGateway s3 integration directly

https://docs.aws.amazon.com/apigateway/latest/developerguide/integrating-api-with-aws-services-s3.html

Upvotes: 1

Run B.M.C.
Run B.M.C.

Reputation: 1

tl;dr Use the Lambda Proxy feature of API Gateway

API Gateway passes the raw request to the integrated Lambda function. This request data includes the request headers, query string parameters, URL path variables, payload, and API configuration data. In your example, you can pass in data and filename in a body request.

https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-create-api-as-simple-proxy-for-lambda.html

Upvotes: 0

nicor88
nicor88

Reputation: 1553

The lambda will be invoked with the data that you send with the POST request.

For example, let's say that you make a POST request to your API gateway with this JSON:

{"data": "some data"}

The lambda function will receive in the event argument a proper Python dictionary:

{'data': 'some data'}

Then you can do something like that:

def lambda_handler(event, context):
    data = event.get('data') 
    # this will avoid raising an error if event doesn't contain the data key

    # do whatever you like with Data

Upvotes: 5

Nune Isabekyan
Nune Isabekyan

Reputation: 549

Basically, you pass a base64 encoded string as data Here is a blog post by AWS describing how to achieve that: https://aws.amazon.com/blogs/compute/binary-support-for-api-integrations-with-amazon-api-gateway/

Upvotes: 1

Related Questions