chore: add example code

Original: https://andrew.jorgensenfamily.us/2021/02/sns-webhook-lambda/ PR: #25
2021-08-13 08:45:49 +02:00
1 changed files with 55 additions and 0 deletions
--- a/exampleSite/content/blog/markdown-syntax.md
+++ b/exampleSite/content/blog/markdown-syntax.md
@ -94,6 +94,8 @@ Tables aren't part of the core Markdown spec, but Hugo supports supports them ou
    </html>

 #### Code block with Hugo's internal highlight shortcode
+
+##### html
 {{< highlight html >}}
 <!doctype html>
 <html lang="en">
@ -107,6 +109,59 @@ Tables aren't part of the core Markdown spec, but Hugo supports supports them ou
 </html>
 {{< /highlight >}}

+##### python - lovelace
+{{< highlight python "style=lovelace">}}
+# Copyright Andrew Jorgensen
+# SPDX-License-Identifier: MIT
+"""Receive SNS events in Lambda and POST to a JSON Webhook.
+
+Environment variables required:
+* URL - The Webhook URL to POST to (including any required keys)
+* TEMPLATE (default: {}) - The JSON data template to POST to the Webhook
+* MESSAGE_KEY (default: text) - Key to set to the SNS Message
+* TOPIC_KEY (optional) - Key to set to the Topic name from the SNS event
+"""
+import json
+from os import environ
+from urllib.request import urlopen, Request
+
+CONTENT_TYPE = "application/json; charset=utf-8"
+
+
+def lambda_handler(event, context):
+    """Lambda handler - expects an SNS event"""
+    user_agent = context.function_name
+    print(json.dumps(dict(environ), sort_keys=True))
+    url = environ.get("URL")
+    template = environ.get("TEMPLATE", "{}")
+    message_key = environ.get("MESSAGE_KEY", "text")
+    topic_key = environ.get("TOPIC_KEY")
+
+    print(json.dumps(event, sort_keys=True))
+    topic = event["Records"][0]["Sns"]["TopicArn"].rsplit(":", 1)[1]
+    subject = event["Records"][0]["Sns"]["Subject"]
+    message = event["Records"][0]["Sns"]["Message"]
+
+    data = json.loads(template)
+    if topic_key:
+        data[topic_key] = topic
+    if subject:
+        data[message_key] = f"{subject}: {message}"
+    else:
+        data[message_key] = message
+    data = json.dumps(data, sort_keys=True)
+    print(data)
+
+    request = Request(
+        url=url,
+        data=data.encode("utf-8"),
+        headers={"User-Agent": user_agent, "Content-Type": CONTENT_TYPE},
+    )
+    with urlopen(request) as response:
+        print(response.read().decode("utf-8"))
+
+{{< /highlight >}}
+
 ## List Types

 #### Ordered List