255 lines
6.8 KiB
Python
255 lines
6.8 KiB
Python
#!/bin/python3
|
|
|
|
# lumbung.space rss feed aggregator
|
|
# © 2021 roel roscam abbing gplv3 etc
|
|
|
|
import os
|
|
import shutil
|
|
import time
|
|
from ast import literal_eval as make_tuple
|
|
from urllib.parse import urlparse
|
|
|
|
import arrow
|
|
import feedparser
|
|
import jinja2
|
|
import requests
|
|
from bs4 import BeautifulSoup
|
|
from slugify import slugify
|
|
|
|
|
|
def write_etag(feed_name, feed_data):
|
|
"""
|
|
save timestamp of when feed was last modified
|
|
"""
|
|
etag = ""
|
|
modified = ""
|
|
|
|
if "etag" in feed_data:
|
|
etag = feed_data.etag
|
|
if "modified" in feed_data:
|
|
modified = feed_data.modified
|
|
|
|
if etag or modified:
|
|
with open(os.path.join("etags", feed_name + ".txt"), "w") as f:
|
|
f.write(str((etag, modified)))
|
|
|
|
|
|
def get_etag(feed_name):
|
|
"""
|
|
return timestamp of when feed was last modified
|
|
"""
|
|
fn = os.path.join("etags", feed_name + ".txt")
|
|
etag = ""
|
|
modified = ""
|
|
|
|
if os.path.exists(fn):
|
|
etag, modified = make_tuple(open(fn, "r").read())
|
|
|
|
return etag, modified
|
|
|
|
|
|
def create_frontmatter(entry):
|
|
"""
|
|
parse RSS metadata and return as frontmatter
|
|
"""
|
|
if "published" in entry:
|
|
published = entry.published_parsed
|
|
if "updated" in entry:
|
|
published = entry.updated_parsed
|
|
|
|
published = arrow.get(published)
|
|
|
|
if "author" in entry:
|
|
author = entry.author
|
|
else:
|
|
author = ""
|
|
|
|
tags = []
|
|
if "tags" in entry:
|
|
# TODO finish categories
|
|
for t in entry.tags:
|
|
tags.append(t["term"])
|
|
|
|
frontmatter = {
|
|
"title": entry.title,
|
|
"date": published.format(),
|
|
"summary": "",
|
|
"author": author,
|
|
"original_link": entry.link,
|
|
"feed_name": entry["feed_name"],
|
|
"tags": str(tags),
|
|
}
|
|
|
|
return frontmatter
|
|
|
|
|
|
def create_post(post_dir, entry):
|
|
"""
|
|
write hugo post based on RSS entry
|
|
"""
|
|
frontmatter = create_frontmatter(entry)
|
|
|
|
if not os.path.exists(post_dir):
|
|
os.makedirs(post_dir)
|
|
|
|
if "content" in entry:
|
|
post_content = entry.content[0].value
|
|
else:
|
|
post_content = entry.summary
|
|
|
|
parsed_content = parse_posts(post_dir, post_content)
|
|
|
|
with open(os.path.join(post_dir, "index.html"), "w") as f: # n.b. .html
|
|
post = template.render(frontmatter=frontmatter, content=parsed_content)
|
|
f.write(post)
|
|
print("created post for", entry.title, "({})".format(entry.link))
|
|
|
|
|
|
def grab_media(post_directory, url):
|
|
"""
|
|
download media linked in post to have local copy
|
|
if download succeeds return new local path otherwise return url
|
|
"""
|
|
image = urlparse(url).path.split("/")[-1]
|
|
|
|
try:
|
|
if not os.path.exists(os.path.join(post_directory, image)):
|
|
# TODO: stream is true is a conditional so we could check the headers for things, mimetype etc
|
|
response = requests.get(url, stream=True)
|
|
if response.ok:
|
|
with open(os.path.join(post_directory, image), "wb") as img_file:
|
|
shutil.copyfileobj(response.raw, img_file)
|
|
print("Downloaded cover image", image)
|
|
return image
|
|
return image
|
|
elif os.path.exists(os.path.join(post_directory, image)):
|
|
return image
|
|
|
|
except Exception as e:
|
|
print("Failed to download image", url)
|
|
print(e)
|
|
return url
|
|
|
|
|
|
def parse_posts(post_dir, post_content):
|
|
"""
|
|
parse the post content to for media items
|
|
replace foreign image with local copy
|
|
filter out iframe sources not in allowlist
|
|
"""
|
|
soup = BeautifulSoup(post_content, "html.parser")
|
|
allowed_iframe_sources = ["youtube.com", "vimeo.com", "tv.lumbung.space"]
|
|
media = []
|
|
|
|
for img in soup(["img", "object"]):
|
|
local_image = grab_media(post_dir, img["src"])
|
|
if img["src"] != local_image:
|
|
img["src"] = local_image
|
|
|
|
for iframe in soup(["iframe"]):
|
|
if not any(source in iframe["src"] for source in allowed_iframe_sources):
|
|
print("filtered iframe: {}...".format(iframe["src"][:25]))
|
|
iframe.decompose()
|
|
return soup.decode()
|
|
|
|
|
|
def grab_feed(feed_url):
|
|
"""
|
|
check whether feed has been updated
|
|
download & return it if it has
|
|
"""
|
|
feed_name = urlparse(feed_url).netloc
|
|
|
|
etag, modified = get_etag(feed_name)
|
|
|
|
try:
|
|
if modified:
|
|
data = feedparser.parse(feed_url, modified=modified)
|
|
elif etag:
|
|
data = feedparser.parse(feed_url, etag=etag)
|
|
else:
|
|
data = feedparser.parse(feed_url)
|
|
except Exception as e:
|
|
print("Error grabbing feed")
|
|
print(feed_name)
|
|
print(e)
|
|
return False
|
|
|
|
print(data.status, feed_url)
|
|
if data.status == 200:
|
|
# 304 means the feed has not been modified since we last checked
|
|
write_etag(feed_name, data)
|
|
return data
|
|
return False
|
|
|
|
|
|
feed_urls = open("feeds_list.txt", "r").read().splitlines()
|
|
|
|
start = time.time()
|
|
|
|
if not os.path.exists("etags"):
|
|
os.mkdir("etags")
|
|
|
|
|
|
env = jinja2.Environment(loader=jinja2.FileSystemLoader(os.path.curdir))
|
|
|
|
output_dir = os.environ.get(
|
|
"OUTPUT_DIR", "/home/r/Programming/lumbung.space/lumbung.space-web/content/posts/"
|
|
)
|
|
# output_dir = os.environ.get('OUTPUT_DIR', 'network/')
|
|
|
|
if not os.path.exists(output_dir):
|
|
os.makedirs(output_dir)
|
|
|
|
template = env.get_template("post_template.md")
|
|
|
|
# add iframe to the allowlist of feedparser's sanitizer,
|
|
# this is now handled in parse_post()
|
|
feedparser.sanitizer._HTMLSanitizer.acceptable_elements |= {"iframe"}
|
|
|
|
for feed_url in feed_urls:
|
|
|
|
feed_name = urlparse(feed_url).netloc
|
|
|
|
feed_dir = os.path.join(output_dir, feed_name)
|
|
|
|
if not os.path.exists(feed_dir):
|
|
os.makedirs(feed_dir)
|
|
|
|
existing_posts = os.listdir(feed_dir)
|
|
|
|
data = grab_feed(feed_url)
|
|
|
|
if data:
|
|
for entry in data.entries:
|
|
# if 'tags' in entry:
|
|
# for tag in entry.tags:
|
|
# for x in ['lumbung.space', 'D15', 'lumbung']:
|
|
# if x in tag['term']:
|
|
# print(entry.title)
|
|
entry["feed_name"] = feed_name
|
|
|
|
post_name = slugify(entry.title)
|
|
post_dir = os.path.join(output_dir, feed_name, post_name)
|
|
|
|
if post_name not in existing_posts:
|
|
# if there is a blog entry we dont already have, make it
|
|
create_post(post_dir, entry)
|
|
|
|
elif post_name in existing_posts:
|
|
# if we already have it, update it
|
|
create_post(post_dir, entry)
|
|
existing_posts.remove(
|
|
post_name
|
|
) # create list of posts which have not been returned by the feed
|
|
|
|
for post in existing_posts:
|
|
# remove blog posts no longer returned by the RSS feed
|
|
print("deleted", post)
|
|
shutil.rmtree(os.path.join(feed_dir, slugify(post)))
|
|
|
|
|
|
end = time.time()
|
|
|
|
print(end - start)
|