epicyon/newsdaemon.py

768 lines
29 KiB
Python

__filename__ = "newsdaemon.py"
__author__ = "Bob Mottram"
__license__ = "AGPL3+"
__version__ = "1.1.0"
__maintainer__ = "Bob Mottram"
__email__ = "bob@freedombone.net"
__status__ = "Production"
# Example hashtag logic:
#
# if moderated and not #imcoxford then block
# if #pol and contains "westminster" then add #britpol
# if #unwantedtag then block
import os
import time
import datetime
import html
from shutil import rmtree
from subprocess import Popen
from collections import OrderedDict
from newswire import getDictFromNewswire
# from posts import sendSignedJson
from posts import createNewsPost
from posts import archivePostsForPerson
from content import removeHtmlTag
from content import dangerousMarkup
from content import validHashTag
from utils import loadJson
from utils import saveJson
from utils import getStatusNumber
from utils import clearFromPostCaches
from inbox import storeHashTags
def updateFeedsOutboxIndex(baseDir: str, domain: str, postId: str) -> None:
"""Updates the index used for imported RSS feeds
"""
basePath = baseDir + '/accounts/news@' + domain
indexFilename = basePath + '/outbox.index'
if os.path.isfile(indexFilename):
if postId not in open(indexFilename).read():
try:
with open(indexFilename, 'r+') as feedsFile:
content = feedsFile.read()
feedsFile.seek(0, 0)
feedsFile.write(postId + '\n' + content)
print('DEBUG: feeds post added to index')
except Exception as e:
print('WARN: Failed to write entry to feeds posts index ' +
indexFilename + ' ' + str(e))
else:
feedsFile = open(indexFilename, 'w+')
if feedsFile:
feedsFile.write(postId + '\n')
feedsFile.close()
def saveArrivedTime(baseDir: str, postFilename: str, arrived: str) -> None:
"""Saves the time when an rss post arrived to a file
"""
arrivedFile = open(postFilename + '.arrived', 'w+')
if arrivedFile:
arrivedFile.write(arrived)
arrivedFile.close()
def removeControlCharacters(content: str) -> str:
"""Remove escaped html
"""
if '&' in content:
return html.unescape(content)
return content
def hashtagRuleResolve(tree: [], hashtags: [], moderated: bool,
content: str, url: str) -> bool:
"""Returns whether the tree for a hashtag rule evaluates to true or false
"""
if not tree:
return False
if tree[0] == 'not':
if len(tree) == 2:
if isinstance(tree[1], str):
return tree[1] not in hashtags
elif isinstance(tree[1], list):
return not hashtagRuleResolve(tree[1], hashtags, moderated,
content, url)
elif tree[0] == 'contains':
if len(tree) == 2:
matchStr = None
if isinstance(tree[1], str):
matchStr = tree[1]
elif isinstance(tree[1], list):
matchStr = tree[1][0]
if matchStr:
if matchStr.startswith('"') and matchStr.endswith('"'):
matchStr = matchStr[1:]
matchStr = matchStr[:len(matchStr) - 1]
matchStrLower = matchStr.lower()
contentWithoutTags = content.replace('#' + matchStrLower, '')
return matchStrLower in contentWithoutTags
elif tree[0] == 'from':
if len(tree) == 2:
matchStr = None
if isinstance(tree[1], str):
matchStr = tree[1]
elif isinstance(tree[1], list):
matchStr = tree[1][0]
if matchStr:
if matchStr.startswith('"') and matchStr.endswith('"'):
matchStr = matchStr[1:]
matchStr = matchStr[:len(matchStr) - 1]
return matchStr.lower() in url
elif tree[0] == 'and':
if len(tree) >= 3:
for argIndex in range(1, len(tree)):
argValue = False
if isinstance(tree[argIndex], str):
argValue = (tree[argIndex] in hashtags)
elif isinstance(tree[argIndex], list):
argValue = hashtagRuleResolve(tree[argIndex],
hashtags, moderated,
content, url)
if not argValue:
return False
return True
elif tree[0] == 'or':
if len(tree) >= 3:
for argIndex in range(1, len(tree)):
argValue = False
if isinstance(tree[argIndex], str):
argValue = (tree[argIndex] in hashtags)
elif isinstance(tree[argIndex], list):
argValue = hashtagRuleResolve(tree[argIndex],
hashtags, moderated,
content, url)
if argValue:
return True
return False
elif tree[0] == 'xor':
if len(tree) >= 3:
trueCtr = 0
for argIndex in range(1, len(tree)):
argValue = False
if isinstance(tree[argIndex], str):
argValue = (tree[argIndex] in hashtags)
elif isinstance(tree[argIndex], list):
argValue = hashtagRuleResolve(tree[argIndex],
hashtags, moderated,
content, url)
if argValue:
trueCtr += 1
if trueCtr == 1:
return True
elif tree[0].startswith('#') and len(tree) == 1:
return tree[0] in hashtags
elif tree[0].startswith('moderated'):
return moderated
elif tree[0].startswith('"') and tree[0].endswith('"'):
return True
return False
def hashtagRuleTree(operators: [],
conditionsStr: str,
tagsInConditions: [],
moderated: bool) -> []:
"""Walks the tree
"""
if not operators and conditionsStr:
conditionsStr = conditionsStr.strip()
isStr = conditionsStr.startswith('"') and conditionsStr.endswith('"')
if conditionsStr.startswith('#') or isStr or \
conditionsStr in operators or \
conditionsStr == 'moderated' or \
conditionsStr == 'contains':
if conditionsStr.startswith('#'):
if conditionsStr not in tagsInConditions:
if ' ' not in conditionsStr or \
conditionsStr.startswith('"'):
tagsInConditions.append(conditionsStr)
return [conditionsStr.strip()]
else:
return None
if not operators or not conditionsStr:
return None
tree = None
conditionsStr = conditionsStr.strip()
isStr = conditionsStr.startswith('"') and conditionsStr.endswith('"')
if conditionsStr.startswith('#') or isStr or \
conditionsStr in operators or \
conditionsStr == 'moderated' or \
conditionsStr == 'contains':
if conditionsStr.startswith('#'):
if conditionsStr not in tagsInConditions:
if ' ' not in conditionsStr or \
conditionsStr.startswith('"'):
tagsInConditions.append(conditionsStr)
tree = [conditionsStr.strip()]
ctr = 0
while ctr < len(operators):
op = operators[ctr]
opMatch = ' ' + op + ' '
if opMatch not in conditionsStr and \
not conditionsStr.startswith(op + ' '):
ctr += 1
continue
else:
tree = [op]
if opMatch in conditionsStr:
sections = conditionsStr.split(opMatch)
else:
sections = conditionsStr.split(op + ' ', 1)
for subConditionStr in sections:
result = hashtagRuleTree(operators[ctr + 1:],
subConditionStr,
tagsInConditions, moderated)
if result:
tree.append(result)
break
return tree
def newswireHashtagProcessing(session, baseDir: str, postJsonObject: {},
hashtags: [], httpPrefix: str,
domain: str, port: int,
personCache: {},
cachedWebfingers: {},
federationList: [],
sendThreads: [], postLog: [],
moderated: bool, url: str) -> bool:
"""Applies hashtag rules to a news post.
Returns true if the post should be saved to the news timeline
of this instance
"""
rulesFilename = baseDir + '/accounts/hashtagrules.txt'
if not os.path.isfile(rulesFilename):
return True
rules = []
with open(rulesFilename, "r") as f:
rules = f.readlines()
domainFull = domain
if port:
if port != 80 and port != 443:
domainFull = domain + ':' + str(port)
# get the full text content of the post
content = ''
if postJsonObject['object'].get('content'):
content += postJsonObject['object']['content']
if postJsonObject['object'].get('summary'):
content += ' ' + postJsonObject['object']['summary']
content = content.lower()
# actionOccurred = False
operators = ('not', 'and', 'or', 'xor', 'from', 'contains')
for ruleStr in rules:
if not ruleStr:
continue
if not ruleStr.startswith('if '):
continue
if ' then ' not in ruleStr:
continue
conditionsStr = ruleStr.split('if ', 1)[1]
conditionsStr = conditionsStr.split(' then ')[0]
tagsInConditions = []
tree = hashtagRuleTree(operators, conditionsStr,
tagsInConditions, moderated)
if not hashtagRuleResolve(tree, hashtags, moderated, content, url):
continue
# the condition matches, so do something
actionStr = ruleStr.split(' then ')[1].strip()
# add a hashtag
if actionStr.startswith('add '):
addHashtag = actionStr.split('add ', 1)[1].strip()
if addHashtag.startswith('#'):
if addHashtag not in hashtags:
hashtags.append(addHashtag)
htId = addHashtag.replace('#', '')
if validHashTag(htId):
hashtagUrl = \
httpPrefix + "://" + domainFull + "/tags/" + htId
newTag = {
'href': hashtagUrl,
'name': addHashtag,
'type': 'Hashtag'
}
# does the tag already exist?
addTagObject = None
for t in postJsonObject['object']['tag']:
if t.get('type') and t.get('name'):
if t['type'] == 'Hashtag' and \
t['name'] == addHashtag:
addTagObject = t
break
# append the tag if it wasn't found
if not addTagObject:
postJsonObject['object']['tag'].append(newTag)
# add corresponding html to the post content
hashtagHtml = \
" <a href=\"" + hashtagUrl + \
"\" class=\"addedHashtag\" " + \
"rel=\"tag\">#<span>" + \
htId + "</span></a>"
content = postJsonObject['object']['content']
if hashtagHtml not in content:
if content.endswith('</p>'):
content = \
content[:len(content) - len('</p>')] + \
hashtagHtml + '</p>'
else:
content += hashtagHtml
postJsonObject['object']['content'] = content
storeHashTags(baseDir, 'news', postJsonObject)
# actionOccurred = True
# remove a hashtag
if actionStr.startswith('remove '):
rmHashtag = actionStr.split('remove ', 1)[1].strip()
if rmHashtag.startswith('#'):
if rmHashtag in hashtags:
hashtags.remove(rmHashtag)
htId = rmHashtag.replace('#', '')
hashtagUrl = \
httpPrefix + "://" + domainFull + "/tags/" + htId
# remove tag html from the post content
hashtagHtml = \
"<a href=\"" + hashtagUrl + \
"\" class=\"addedHashtag\" " + \
"rel=\"tag\">#<span>" + \
htId + "</span></a>"
content = postJsonObject['object']['content']
if hashtagHtml in content:
content = \
content.replace(hashtagHtml, '').replace(' ', ' ')
postJsonObject['object']['content'] = content
rmTagObject = None
for t in postJsonObject['object']['tag']:
if t.get('type') and t.get('name'):
if t['type'] == 'Hashtag' and \
t['name'] == rmHashtag:
rmTagObject = t
break
if rmTagObject:
postJsonObject['object']['tag'].remove(rmTagObject)
# actionOccurred = True
# Block this item
if actionStr.startswith('block') or actionStr.startswith('drop'):
return False
# TODO
# If routing to another instance
# sendSignedJson(postJsonObject: {}, session, baseDir: str,
# nickname: str, domain: str, port: int,
# toNickname: str, toDomain: str, toPort: int, cc: str,
# httpPrefix: str, False, False,
# federationList: [],
# sendThreads: [], postLog: [], cachedWebfingers: {},
# personCache: {}, False, __version__) -> int:
# if actionOccurred:
# return True
return True
def createNewsMirror(baseDir: str, domain: str,
postIdNumber: str, url: str,
maxMirroredArticles: int) -> bool:
"""Creates a local mirror of a news article
"""
if '|' in url or '>' in url:
return True
mirrorDir = baseDir + '/accounts/newsmirror'
if not os.path.isdir(mirrorDir):
os.mkdir(mirrorDir)
# count the directories
noOfDirs = 0
for subdir, dirs, files in os.walk(mirrorDir):
noOfDirs = len(dirs)
mirrorIndexFilename = baseDir + '/accounts/newsmirror.txt'
if maxMirroredArticles > 0 and noOfDirs > maxMirroredArticles:
if not os.path.isfile(mirrorIndexFilename):
# no index for mirrors found
return True
removals = []
with open(mirrorIndexFilename, 'r') as indexFile:
# remove the oldest directories
ctr = 0
while noOfDirs > maxMirroredArticles:
ctr += 1
if ctr > 5000:
# escape valve
break
postId = indexFile.readline()
if not postId:
continue
postId = postId.strip()
mirrorArticleDir = mirrorDir + '/' + postId
if os.path.isdir(mirrorArticleDir):
rmtree(mirrorArticleDir)
removals.append(postId)
noOfDirs -= 1
# remove the corresponding index entries
if removals:
indexContent = ''
with open(mirrorIndexFilename, 'r') as indexFile:
indexContent = indexFile.read()
for removePostId in removals:
indexContent = \
indexContent.replace(removePostId + '\n', '')
with open(mirrorIndexFilename, "w+") as indexFile:
indexFile.write(indexContent)
mirrorArticleDir = mirrorDir + '/' + postIdNumber
if os.path.isdir(mirrorArticleDir):
# already mirrored
return True
# for onion instances mirror via tor
prefixStr = ''
if domain.endswith('.onion'):
prefixStr = '/usr/bin/torsocks '
# download the files
commandStr = \
prefixStr + '/usr/bin/wget -mkEpnp -e robots=off ' + url + \
' -P ' + mirrorArticleDir
p = Popen(commandStr, shell=True)
os.waitpid(p.pid, 0)
if not os.path.isdir(mirrorArticleDir):
print('WARN: failed to mirror ' + url)
return True
# append the post Id number to the index file
if os.path.isfile(mirrorIndexFilename):
indexFile = open(mirrorIndexFilename, "a+")
if indexFile:
indexFile.write(postIdNumber + '\n')
indexFile.close()
else:
indexFile = open(mirrorIndexFilename, "w+")
if indexFile:
indexFile.write(postIdNumber + '\n')
indexFile.close()
return True
def convertRSStoActivityPub(baseDir: str, httpPrefix: str,
domain: str, port: int,
newswire: {},
translate: {},
recentPostsCache: {}, maxRecentPosts: int,
session, cachedWebfingers: {},
personCache: {},
federationList: [],
sendThreads: [], postLog: [],
maxMirroredArticles: int) -> None:
"""Converts rss items in a newswire into posts
"""
if not newswire:
return
basePath = baseDir + '/accounts/news@' + domain + '/outbox'
if not os.path.isdir(basePath):
os.mkdir(basePath)
# oldest items first
newswireReverse = \
OrderedDict(sorted(newswire.items(), reverse=False))
for dateStr, item in newswireReverse.items():
originalDateStr = dateStr
# convert the date to the format used by ActivityPub
if '+00:00' in dateStr:
dateStr = dateStr.replace(' ', 'T')
dateStr = dateStr.replace('+00:00', 'Z')
else:
dateStrWithOffset = \
datetime.datetime.strptime(dateStr, "%Y-%m-%d %H:%M:%S%z")
dateStr = dateStrWithOffset.strftime("%Y-%m-%dT%H:%M:%SZ")
statusNumber, published = getStatusNumber(dateStr)
newPostId = \
httpPrefix + '://' + domain + \
'/users/news/statuses/' + statusNumber
# file where the post is stored
filename = basePath + '/' + newPostId.replace('/', '#') + '.json'
if os.path.isfile(filename):
# don't create the post if it already exists
# set the url
newswire[originalDateStr][1] = \
'/users/news/statuses/' + statusNumber
# set the filename
newswire[originalDateStr][3] = filename
continue
rssTitle = removeControlCharacters(item[0])
url = item[1]
if dangerousMarkup(url) or dangerousMarkup(rssTitle):
continue
rssDescription = ''
# get the rss description if it exists
rssDescription = removeControlCharacters(item[4])
if rssDescription.startswith('<![CDATA['):
rssDescription = rssDescription.replace('<![CDATA[', '')
rssDescription = rssDescription.replace(']]>', '')
if '&' in rssDescription:
rssDescription = html.unescape(rssDescription)
rssDescription = '<p>' + rssDescription + '<p>'
mirrored = item[7]
postUrl = url
if mirrored and '://' in url:
postUrl = '/newsmirror/' + statusNumber + '/' + \
url.split('://')[1]
if postUrl.endswith('/'):
postUrl += 'index.html'
else:
postUrl += '/index.html'
# add the off-site link to the description
if rssDescription and not dangerousMarkup(rssDescription):
rssDescription += \
'<br><a href="' + postUrl + '">' + \
translate['Read more...'] + '</a>'
else:
rssDescription = \
'<a href="' + postUrl + '">' + \
translate['Read more...'] + '</a>'
# remove image dimensions
if '<img' in rssDescription:
rssDescription = removeHtmlTag(rssDescription, 'width')
rssDescription = removeHtmlTag(rssDescription, 'height')
followersOnly = False
useBlurhash = False
# NOTE: the id when the post is created will not be
# consistent (it's based on the current time, not the
# published time), so we change that later
blog = createNewsPost(baseDir,
domain, port, httpPrefix,
rssDescription,
followersOnly, False,
None, None, None, useBlurhash,
rssTitle)
if not blog:
continue
if mirrored:
if not createNewsMirror(baseDir, domain, statusNumber,
url, maxMirroredArticles):
continue
idStr = \
httpPrefix + '://' + domain + '/users/news' + \
'/statuses/' + statusNumber + '/replies'
blog['news'] = True
# note the time of arrival
currTime = datetime.datetime.utcnow()
blog['object']['arrived'] = currTime.strftime("%Y-%m-%dT%H:%M:%SZ")
# change the id, based upon the published time
blog['object']['replies']['id'] = idStr
blog['object']['replies']['first']['partOf'] = idStr
blog['id'] = newPostId + '/activity'
blog['object']['id'] = newPostId
blog['object']['atomUri'] = newPostId
blog['object']['url'] = \
httpPrefix + '://' + domain + '/@news/' + statusNumber
blog['object']['published'] = dateStr
blog['object']['content'] = rssDescription
blog['object']['contentMap']['en'] = rssDescription
domainFull = domain
if port:
if port != 80 and port != 443:
domainFull = domain + ':' + str(port)
hashtags = item[6]
postId = newPostId.replace('/', '#')
moderated = item[5]
savePost = newswireHashtagProcessing(session, baseDir, blog, hashtags,
httpPrefix, domain, port,
personCache, cachedWebfingers,
federationList,
sendThreads, postLog,
moderated, url)
# save the post and update the index
if savePost:
# ensure that all hashtags are stored in the json
# and appended to the content
blog['object']['tag'] = []
for tagName in hashtags:
htId = tagName.replace('#', '')
hashtagUrl = \
httpPrefix + "://" + domainFull + "/tags/" + htId
newTag = {
'href': hashtagUrl,
'name': tagName,
'type': 'Hashtag'
}
blog['object']['tag'].append(newTag)
hashtagHtml = \
" <a href=\"" + hashtagUrl + \
"\" class=\"addedHashtag\" " + \
"rel=\"tag\">#<span>" + \
htId + "</span></a>"
content = blog['object']['content']
if hashtagHtml not in content:
if content.endswith('</p>'):
content = \
content[:len(content) - len('</p>')] + \
hashtagHtml + '</p>'
else:
content += hashtagHtml
blog['object']['content'] = content
# update the newswire tags if new ones have been found by
# newswireHashtagProcessing
for tag in hashtags:
if tag not in newswire[originalDateStr][6]:
newswire[originalDateStr][6].append(tag)
storeHashTags(baseDir, 'news', blog)
clearFromPostCaches(baseDir, recentPostsCache, postId)
if saveJson(blog, filename):
updateFeedsOutboxIndex(baseDir, domain, postId + '.json')
# Save a file containing the time when the post arrived
# this can then later be used to construct the news timeline
# excluding items during the voting period
if moderated:
saveArrivedTime(baseDir, filename,
blog['object']['arrived'])
else:
if os.path.isfile(filename + '.arrived'):
os.remove(filename + '.arrived')
# set the url
newswire[originalDateStr][1] = \
'/users/news/statuses/' + statusNumber
# set the filename
newswire[originalDateStr][3] = filename
def mergeWithPreviousNewswire(oldNewswire: {}, newNewswire: {}) -> None:
"""Preserve any votes or generated activitypub post filename
as rss feeds are updated
"""
if not oldNewswire:
return
for published, fields in oldNewswire.items():
if not newNewswire.get(published):
continue
for i in range(1, 5):
newNewswire[published][i] = fields[i]
def runNewswireDaemon(baseDir: str, httpd,
httpPrefix: str, domain: str, port: int,
translate: {}) -> None:
"""Periodically updates RSS feeds
"""
newswireStateFilename = baseDir + '/accounts/.newswirestate.json'
# initial sleep to allow the system to start up
time.sleep(50)
while True:
# has the session been created yet?
if not httpd.session:
print('Newswire daemon waiting for session')
time.sleep(60)
continue
# try to update the feeds
newNewswire = None
try:
newNewswire = \
getDictFromNewswire(httpd.session, baseDir, domain,
httpd.maxNewswirePostsPerSource,
httpd.maxNewswireFeedSizeKb,
httpd.maxTags,
httpd.maxFeedItemSizeKb)
except Exception as e:
print('WARN: unable to update newswire ' + str(e))
time.sleep(120)
continue
if not httpd.newswire:
if os.path.isfile(newswireStateFilename):
httpd.newswire = loadJson(newswireStateFilename)
mergeWithPreviousNewswire(httpd.newswire, newNewswire)
httpd.newswire = newNewswire
saveJson(httpd.newswire, newswireStateFilename)
print('Newswire updated')
convertRSStoActivityPub(baseDir,
httpPrefix, domain, port,
newNewswire, translate,
httpd.recentPostsCache,
httpd.maxRecentPosts,
httpd.session,
httpd.cachedWebfingers,
httpd.personCache,
httpd.federationList,
httpd.sendThreads,
httpd.postLog,
httpd.maxMirroredArticles)
print('Newswire feed converted to ActivityPub')
if httpd.maxNewsPosts > 0:
archiveDir = baseDir + '/archive'
archiveSubdir = \
archiveDir + '/accounts/news@' + domain + '/outbox'
archivePostsForPerson(httpPrefix, 'news',
domain, baseDir, 'outbox',
archiveSubdir,
httpd.recentPostsCache,
httpd.maxNewsPosts)
# wait a while before the next feeds update
time.sleep(1200)
def runNewswireWatchdog(projectVersion: str, httpd) -> None:
"""This tries to keep the newswire update thread running even if it dies
"""
print('Starting newswire watchdog')
newswireOriginal = \
httpd.thrPostSchedule.clone(runNewswireDaemon)
httpd.thrNewswireDaemon.start()
while True:
time.sleep(50)
if not httpd.thrNewswireDaemon.isAlive():
httpd.thrNewswireDaemon.kill()
httpd.thrNewswireDaemon = \
newswireOriginal.clone(runNewswireDaemon)
httpd.thrNewswireDaemon.start()
print('Restarting newswire daemon...')