How to use api in lambda python

Question

I tried to log in into a website using post requests in python by passing the username and password using the below code and it worked.

import requests
with requests.Session() as c:
    url='http://testing-ground.scraping.pro/login?mode=login'
    usr='admin'
    pwd='12345'
    c.get(url)
    print(c.cookies)
    login_data=dict(usr=usr,pwd=pwd)
    res=c.post(url,data=login_data)
    print(res)
    page=c.get('http://testing-ground.scraping.pro/login?mode=welcome')
    print(page.content)

Now,I want to try the same(log in to the same website using post requests) in lambda aws in python.I am a beginner to lambda,aws and have no idea how to proceed in lambda.

Marcin · Accepted Answer · 2020-06-28 23:23:37Z

1

You have to modify the code to run in lambda environment.

For that you will need a lambda handler function as described here:

AWS Lambda function handler in Python

Also requests is not provided anymore in lambda. Thus, the easiest way to add requests to your lambda function would be through lambda layers as described in section Using AWS Lambda Layers of:

Upcoming changes to the Python SDK in AWS Lambda

The crude version of your code for lambda would be (assuming requests layer is setup):

import requests

def handler(event, context):

    with requests.Session() as c:
        url='http://testing-ground.scraping.pro/login?mode=login'
        usr='admin'
        pwd='12345'
        c.get(url)
        print(c.cookies)
        login_data=dict(usr=usr,pwd=pwd)
        res=c.post(url,data=login_data)
        print(res)
        page=c.get('http://testing-ground.scraping.pro/login?mode=welcome')
        print(page.content)

edited Jun 28, 2020 at 23:23

answered Jun 28, 2020 at 23:16

Marcin

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2 Comments

lakshmi Over a year ago

Should I use any json.loads () while modifying the code?I just read some of the articles and they used json.loads and also urllib3.Thats why I am a bit confused.

Marcin Over a year ago

@lakshmi I added an example code. If you don't want to use requests layer than you can use python's build in tools for http functionality.

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