scrape.py

#!/usr/bin/env python3
# coding: utf-8

# MIT license
# (see: http://www.opensource.org/licenses/mit-license.php)
#
# Copyright (c) 2014 Ted Timmons, ted@timmons.me
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

import os
import sys
import boto3
import requests
import PyRSS2Gen
import datetime
import dateutil

def item_to_rss(item):
  link = "https://aws.amazon.com/" + item["id"].replace("#","/") + "/"
  desc = ""
  if "description" in item["additionalFields"]:
    desc = item["additionalFields"]["description"]
  elif "content" in item["additionalFields"]:
    desc = item["additionalFields"]["content"]

  return PyRSS2Gen.RSSItem(
    author = item["author"],
    title = item["name"],
    link = link,
    guid = link,
    description = desc,
    pubDate = dateutil.parser.parse(item["dateUpdated"])
  )

request = requests.get("https://aws.amazon.com/api/dirs/releasenotes/items?order_by=DateCreated&sort_ascending=false&limit=25&locale=en_US")

if request.status_code == 500:
  sys.exit(0)

rss = PyRSS2Gen.RSS2(
  title = "Amazon AWS Release Notes scraped feed",
  link = "https://aws.amazon.com/releasenotes/",
  ttl = 6*60, # in minutes!
  docs = "https://github.com/tedder/aws-release-notes-rss",
  description = "new code and features from AWS",
  lastBuildDate = datetime.datetime.now(),
  items = map(item_to_rss, request.json()["items"])
)

rssdata = rss.to_xml(request.encoding)


if os.environ.get('S3_BUCKET_NAME'):
  s3 = boto3.client("s3")
  s3.put_object(
    Bucket=os.environ["S3_BUCKET_NAME"],
    Key="rss/aws-release-notes.xml",
    Body=rssdata,
    ContentType="application/rss+xml",
    CacheControl="max-age=21600,public",
    ACL="public-read"
  )

else:
  print(rssdata)