Lambda function unable to send email with HTML form data
Question
I am new to AWS Lambda and I am trying to send an email with details submitted in an HTML form using AWS SES. I tested out the lambda function with hard coded values and the emails worked fine. Below is the initial code:
# Lambda Function for Contact Forms using AWS SES
import boto3
import datetime
def lambda_handler(event, context):
client = boto3.client('ses')
response = client.send_email(
Destination={
'BccAddresses': [
],
'CcAddresses': [
'abc@gmail.com',
],
'ToAddresses': [
'abc@example.com',
],
},
Message={
'Body': {
'Html': {
'Charset': 'UTF-8',
'Data': 'This message body contains HTML formatting. It can, for example, contain links like this one: <a class="ulink" href="http://docs.aws.amazon.com/ses/latest/DeveloperGuide" target="_blank">Amazon SES Developer Guide</a>.',
},
'Text': {
'Charset': 'UTF-8',
'Data': 'This is the message body in text format.',
},
},
'Subject': {
'Charset': 'UTF-8',
'Data': 'Test email sent at '+datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
},
},
ReplyToAddresses=['xyz@gmail.com',
],
Source='abc@example.com',
)
I am now trying to replace the form data (post method) in the email body. This is my new code:
# Lambda Function for Contact Forms using AWS SES
import boto3
import datetime
def lambda_handler(event, context):
client = boto3.client('ses')
error = None
# Read form values.
full_name = event.get('fullname')
email_addr = event.get('emailid')
subject = event.get('subject')
msg_body = event.get('msgbody')
# Check form data.
if not full_name:
error = 'Full name is required.'
elif not email_addr:
error = 'Email address is required.'
elif not subject:
error = 'Subject is required.'
elif not msg_body:
error = 'Message body is required.'
if error is None:
response = client.send_email(
Destination={
'BccAddresses': [
],
'CcAddresses': [
'abc@gmail.com',
],
'ToAddresses': [
'abc@example.com',
],
},
Message={
'Body': {
'Html': {
'Charset': 'UTF-8',
'Data': msg_body,
},
'Text': {
'Charset': 'UTF-8',
'Data': msg_body,
},
},
'Subject': {
'Charset': 'UTF-8',
'Data': subject+' | example.com | '+datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'),
},
},
ReplyToAddresses=[email_addr,
],
Source='abc@example.com',
)
The above code does not throw any error in the Cloud Watch logs but it does not deliver the email also. What am I missing here?
Following is the cloud watch log:
START RequestId: 9ce6de23-9f1d-4d67-a686-ea043692221e Version: $LATEST
END RequestId: 9ce6de23-9f1d-4d67-a686-ea043692221e
REPORT RequestId: 9ce6de23-9f1d-4d67-a686-ea043692221e Duration: 25.39 ms Billed Duration: 26 ms Memory Size: 128 MB Max Memory Used: 65 MB
The HTML form code is shared below:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Contact | Example Website</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="Example Description">
<meta name="keywords" content="example,contact,form">
<meta name="author" content="example.com">
<script src="js/jquery-3.4.1.min.js"></script>
<link rel="stylesheet" href="css/bootstrap.min.css"></link>
<script src="js/bootstrap.min.js"></script>
<script src="js/formcheck.js"></script>
<link rel="icon" href=""></link>
<link href="css2/sticky-footer-navbar.css" rel="stylesheet"></link>
<link rel="icon" href="assets/example-logo-small.png" type="image/png" sizes="16x16"></link>
<!-- Google ReCaptcha v2 -->
<script src="https://www.google.com/recaptcha/api.js"></script>
</head>
<body>
<header>
<!-- Fixed navbar -->
<nav class="navbar navbar-expand-md navbar-dark fixed-top bg-dark">
<a class="navbar-brand" href="index.html">
<img src="assets/example-logo-small.png" alt="Logo" style="width:50px;">
</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarCollapse">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.html">Home</a>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbardrop1" data-toggle="dropdown">Products</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="1.html">1</a>
<a class="dropdown-item" href="2.html">2</a>
<a class="dropdown-item" href="3.html">3</a>
<a class="dropdown-item" href="4.html">4</a>
<a class="dropdown-item" href="5.html">5</a>
<a class="dropdown-item" href="6.html">6</a>
</div>
</li>
<li class="nav-item dropdown">
<a class="nav-link dropdown-toggle" href="#" id="navbardrop2" data-toggle="dropdown">Details</a>
<div class="dropdown-menu">
<a class="dropdown-item" href="7.html">7</a>
<a class="dropdown-item" href="8.html">8</a>
<a class="dropdown-item" href="9.html">9</a>
<a class="dropdown-item" href="10.html">10</a>
</div>
</li>
<li class="nav-item">
<a class="nav-link" href="list.html">List</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="contact.html">Contact<span class="sr-only">(current)</span></a>
</li>
</ul>
</div>
</nav>
</header>
<!-- Begin page content -->
<main role="main" class="container">
<div class="container mt-5" style="width:75%">
<form action="https://mylambdafunction.lambda-url.us-east-1.on.aws/" method="post" class="needs-validation" novalidate>
<div class="form-group">
<label for="fullname">Full Name:</label>
<input type="text" class="form-control" id="fullname" placeholder="Enter full name" name="fullname" required>
<div class="valid-feedback">Valid.</div>
<div class="invalid-feedback">Please fill out this field.</div>
</div>
<div class="form-group">
<label for="emailid">Email Address:</label>
<input type="email" class="form-control" id="emailid" placeholder="Enter email address" name="emailid" required>
<div class="valid-feedback">Valid.</div>
<div class="invalid-feedback">Please fill out this field in correct format.</div>
</div>
<div class="form-group">
<label for="subject">Subject:</label>
<input type="text" class="form-control" id="subject" placeholder="Enter subject" name="subject" required>
<div class="valid-feedback">Valid.</div>
<div class="invalid-feedback">Please fill out this field.</div>
</div>
<div class="form-group">
<label for="msgbody">Message:</label>
<textarea class="form-control" rows="5" id="msgbody" placeholder="Enter message" name="msgbody" required></textarea>
<div class="valid-feedback">Valid.</div>
<div class="invalid-feedback">Please fill out this field.</div>
</div>
<div class="form-group form-check">
<label class="form-check-label">
<input class="form-check-input" type="checkbox" name="checkdata" required> I agree to the <a href="declaration.html" target="_blank">declaration</a>.
<div class="valid-feedback">Valid.</div>
<div class="invalid-feedback">Please select the checkbox to continue.</div>
</label>
</div>
<button type="submit" class="btn btn-dark mb-2">Send</button>
<div class="g-recaptcha" data-sitekey="my-site-key"></div>
</form>
</div>
</main>
<!-- Footer Navbar -->
<div class="container">
<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-bottom justify-content-center">
<span class="navbar-text text-white">Copyright © Example</span>
</nav>
</div>
</body>
</html>
1 answers
solution1
2 2022-04-18 05:44:02
I can't diagnose in it's entirety, but I've re-written the snippet in a way the allows me to debug my Lambda's with a little more feedback. Keep in a mind, a lambda succeeding doesn't necessarily mean the code was executed as you expect it to, which is where feedback from the invocation helps validate expected behavior.
If the final response provides a MessageId and a code of 200, I would explore the email client settings next.
import boto3
import datetime, json
def lambda_handler(event, context):
client = boto3.client('ses')
full_name = event.get('fullname')
email_addr = event.get('emailid')
subject = event.get('subject')
msg_body = event.get('msgbody')
if None in [full_name, email_addr, subject, msg_body]:
return {
"statusCode": 500,
"body": json.dumps("Error in email variable definitions.")
}
try:
response = client.send_email(...)
except Exception as e:
return {
"statusCode": 500,
"body": json.dumps("Failed to send email: {}".format(e))
}
return {
"statusCode": 200,
"body": "Email ID: {} sent from Lambda.".format(response.get("MessageId"))
}
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