Add AWS Lambda file

lambda.py

@@ -0,0 +1,63 @@
+from urllib import request as req
+import base64
+
+# running on AWS Lambda (currently)
+def lambda_handler(event, context):
+    # check is date has been passed in the event, else use today
+    print("EVT", event)
+    if ('body' in event):
+        b64date = event['body']
+        try:
+            date = base64.b64decode(b64date).decode("utf8")
+        except:
+            date = event['body']
+        print("sanity check:", date, type(date))
+        return comicWithDate(date)
+
+    r = req.Request('https://www.creators.com/read/heathcliff', headers={'User-Agent': 'Mozilla/5.0'})
+    html = req.urlopen(r).read().decode("utf8")
+
+    urlStart = html.index('https://cdn.alphacomedy.com')
+    imageUrl = html[urlStart:].split("\"")[0]
+
+    response = {
+        'statusCode': 200,
+        'body': imageUrl
+    }
+    
+    return response
+
+
+# date is a string, formatted as %Y/%m/%d
+def comicWithDate(date):
+    notFoundURL = 'https://cdn.discordapp.com/attachments/760773607550353428/1120629965721960498/heathcliff_notfound.png'
+
+    html = None
+    comicURL = f"https://www.gocomics.com/heathcliff/{date}"
+
+    r = req.Request(comicURL, headers={'User-Agent': 'Mozilla/5.0'})
+
+    try:
+        html = req.urlopen(r).read().decode("utf8") 
+    except:
+        return {
+            'statusCode': 404,
+            'body': notFoundURL
+        }
+
+    # check to make sure image exists today (it REALLY should given the above block but idc im being cautious)
+    if "data-image" in html:
+        urlStart = html.index("data-image") + 12
+        imageUrl = html[urlStart:].split("\"")[0]
+    else:
+        return {
+            'statusCode': 404,
+            'body': notFoundURL
+        }
+    
+    response = {
+        'statusCode': 200,
+        'body': imageUrl
+    }
+    
+    return response