Trying to query an API from AWS Lambda

Question

I'm trying to query an open source API that returns IP geolocation information by sending a GET request with the IP.

I'm testing the code with a key that contains an IP address (located in key1). I'm trying to fetch the information after the request is sent but I'm not sure what I'm doing wrong.

I have tried appending the IP to the end of the url (as the geoip API instructs) but I keep getting syntax errors.

import json
from botocore.vendored import requests

def lambda_handler(resp, requests, event):

    event = event.key1

    url = "https://freegeoip.app/json/" +event

    headers = {
        'accept': "application/json",
        'content-type': "application/json"
        }

    response = requests.request("GET", url, headers=headers)

    print(response.text)

I have the code working in regular python syntax below, just don't know how to get it working with lambda

import requests


userIP = '54.81.183.174'

def theFunction():
  url = "https://freegeoip.app/json/" + userIP

  headers = {
        'accept': "application/json",
        'content-type': "application/json"
        }

  response = requests.request("GET", url, headers=headers)

  print(response.text)

theFunction()

score 2 · Accepted Answer · answered Nov 09 '19 at 22:16

2

Your code is using the requests module, which is not installed with AWS Lambda.

You can package it for use with an AWS Lambda function (see python - Cannot use Requests-Module on AWS Lambda - Stack Overflow), but it is simpler to use urllib, which is part of standard Python3.

Here is some code that works:

import urllib.request
import json

def lambda_handler(event, context):

  ip = event['ip']

  with urllib.request.urlopen("https://freegeoip.app/json/" + ip) as f:
    data = json.loads(f.read())

  print(data)
  print(data['city'])

You can trigger it with test data:

{
  "ip": "54.81.183.174"
}

answered Nov 09 '19 at 22:16

John Rotenstein

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Wow this has been bugging me for hours and was so simple. Thanks! I have one question though, why is the response null even though the logs get me the info I wanted? – cookiecrumbler Nov 09 '19 at 22:31
You haven't provided enough information to answer that (eg what do you mean by "the logs get me the info I wanted"), but it might also be due to the incorrect parameters in the `lambda_handler()` function. – John Rotenstein Nov 10 '19 at 02:08
That is my fault! I forgot to include my callback function after I had taken it out for debugging. – cookiecrumbler Nov 10 '19 at 02:24
would I be able to send the test data as a list? – cookiecrumbler Nov 11 '19 at 18:28
The data is sent to the Lambda function as a string, which is then interpreted as a JSON object. You can pass a list as JSON: `[1, 2, 3]` then use it in a loop (eg `for ip in event:` – John Rotenstein Nov 11 '19 at 20:25
How would that translate to a query string? – cookiecrumbler Nov 11 '19 at 23:01
It doesn't. You will need to loop through each value in the list, create an appropriate query string, the retrieve the URL. – John Rotenstein Nov 11 '19 at 23:35

Trying to query an API from AWS Lambda

1 Answers1