Parsing JSON body when triggering a Lambda function with API Gateway cURL request-CodePudding

I'm running a simple function on AWS Lambda that sends emails via SMTP.

The function uses various parameters from event such as "event["reply_to_msg_id"]" and "event["sender_name"]".

import smtplib
from email.message import EmailMessage
from email.utils import make_msgid

def lambda_handler(event, context):
    msg = EmailMessage()
    if event["reply_to_msg_id"] != "":
        msg['References'] = event["reply_to_msg_id"]
        msg['In-Reply-To'] = event["reply_to_msg_id"]
        msg['subject'] = "Re: "   event["content"]["Subject Line"]
    else:
        msg['subject'] = event["content"]["Subject Line"]
    msg['from'] = event["sender_name"]
    msg['To'] = event["target_email"]
    msg['Message-ID'] = make_msgid('random_client_id')
    msg.add_header('Content-Type', 'text/html')
    msg.set_payload(event["content"]["Body"])
    server = smtplib.SMTP_SSL('smtp.gmail.com', 465)
    result = {"Message-ID": msg['Message-ID']}
    try:
        server.login(event["email_account"]["email_address"], event["email_account"]["password"])
        server.send_message(msg)
        server.quit()
        result["Status"] = "Success"

    except Exception as E:
        result["Status"] = str(E)

    return {
        'statusCode': 200,
        'headers': {
            'Content-Type': 'application/json',
            'Access-Control-Allow-Origin': '*'
        },
        'body': json.dumps(result),
        "isBase64Encoded": False
    }

When I run a Test event in AWS Lambda with the following body, everything works perfectly:

{
  "reply_to_msg_id": "",
  "content": {
    "Subject Line": "Test subject line.",
    "Body": "This is <b>a body</b>."
  },
  "sender_name": "Joe Peschi",
  "target_email": "[email protected]",
  "email_account": {
    "email_address": "***********",
    "password": "***********"
  }
}

The Problem:

I can't figure out how to actually reproduce this using the API Gateway. I created an API Gateway trigger for this function, but no matter what I try - I'm not able to properly pass the above parameters into Events like when I run the Lambda test.

CodePudding user response：

events through API gateway have

Here's the final code:

import smtplib
from email.message import EmailMessage
from email.utils import make_msgid

def lambda_handler(event, context):

    try:
        json_body = json.loads(json.loads(json.dumps(event, default=str))["body"])
    except:
        json_body = ""

    if json_body != "":
        event = json_body

    msg = EmailMessage()
    if event["reply_to_msg_id"] != "":
        msg['References'] = event["reply_to_msg_id"]
        msg['In-Reply-To'] = event["reply_to_msg_id"]
        msg['subject'] = "Re: "   event["content"]["Subject Line"]
    else:
        msg['subject'] = event["content"]["Subject Line"]
    msg['from'] = event["sender_name"]
    msg['To'] = event["target_email"]
    msg['Message-ID'] = make_msgid('random_client_id')
    msg.add_header('Content-Type', 'text/html')
    msg.set_payload(event["content"]["Body"])
    server = smtplib.SMTP_SSL('smtp.gmail.com', 465)
    result = {"Message-ID": msg['Message-ID']}
    try:
        server.login(event["email_account"]["email_address"], event["email_account"]["password"])
        server.send_message(msg)
        server.quit()
        result["Status"] = "Success"

    except Exception as E:
        result["Status"] = str(E)

    return {
        'statusCode': 200,
        'headers': {
            'Content-Type': 'application/json',
            'Access-Control-Allow-Origin': '*'
        },
        'body': json.dumps(result),
        "isBase64Encoded": False
    }