mirror of https://gitlab.com/bashrc2/epicyon
460 lines
16 KiB
Python
460 lines
16 KiB
Python
__filename__ = "newswire.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.1.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@freedombone.net"
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__status__ = "Production"
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import os
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import time
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import requests
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from socket import error as SocketError
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import errno
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from datetime import datetime
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from collections import OrderedDict
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from utils import locatePost
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from utils import loadJson
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from utils import saveJson
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from utils import isSuspended
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# from utils import getConfigParam
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def rss2Header(httpPrefix: str,
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nickname: str, domainFull: str,
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title: str, translate: {}) -> str:
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"""Header for an RSS 2.0 feed
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"""
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rssStr = "<?xml version=\"1.0\" encoding=\"UTF-8\" ?>"
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rssStr += "<rss version=\"2.0\">"
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rssStr += '<channel>'
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if title.startswith('News'):
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rssStr += ' <title>Newswire</title>'
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else:
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rssStr += ' <title>' + translate[title] + '</title>'
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if title.startswith('News'):
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rssStr += ' <link>' + httpPrefix + '://' + domainFull + \
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'/newswire.xml' + '</link>'
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else:
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rssStr += ' <link>' + httpPrefix + '://' + domainFull + \
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'/users/' + nickname + '/rss.xml' + '</link>'
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return rssStr
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def rss2Footer() -> str:
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"""Footer for an RSS 2.0 feed
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"""
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rssStr = '</channel>'
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rssStr += '</rss>'
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return rssStr
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def xml2StrToDict(xmlStr: str) -> {}:
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"""Converts an xml 2.0 string to a dictionary
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"""
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if '<item>' not in xmlStr:
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return {}
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result = {}
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rssItems = xmlStr.split('<item>')
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for rssItem in rssItems:
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if '<title>' not in rssItem:
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continue
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if '</title>' not in rssItem:
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continue
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if '<link>' not in rssItem:
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continue
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if '</link>' not in rssItem:
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continue
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if '<pubDate>' not in rssItem:
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continue
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if '</pubDate>' not in rssItem:
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continue
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title = rssItem.split('<title>')[1]
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title = title.split('</title>')[0]
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link = rssItem.split('<link>')[1]
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link = link.split('</link>')[0]
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pubDate = rssItem.split('<pubDate>')[1]
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pubDate = pubDate.split('</pubDate>')[0]
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parsed = False
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try:
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publishedDate = \
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datetime.strptime(pubDate, "%a, %d %b %Y %H:%M:%S %z")
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result[str(publishedDate)] = [title, link]
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parsed = True
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except BaseException:
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pass
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if not parsed:
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try:
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publishedDate = \
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datetime.strptime(pubDate, "%a, %d %b %Y %H:%M:%S UT")
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result[str(publishedDate) + '+00:00'] = [title, link]
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parsed = True
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except BaseException:
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print('WARN: unrecognized RSS date format: ' + pubDate)
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pass
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return result
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def xmlStrToDict(xmlStr: str) -> {}:
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"""Converts an xml string to a dictionary
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"""
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if 'rss version="2.0"' in xmlStr:
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return xml2StrToDict(xmlStr)
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return {}
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def getRSS(session, url: str) -> {}:
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"""Returns an RSS url as a dict
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"""
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if not isinstance(url, str):
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print('url: ' + str(url))
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print('ERROR: getRSS url should be a string')
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return None
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headers = {
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'Accept': 'text/xml; charset=UTF-8'
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}
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params = None
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sessionParams = {}
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sessionHeaders = {}
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if headers:
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sessionHeaders = headers
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if params:
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sessionParams = params
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sessionHeaders['User-Agent'] = \
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'Mozilla/5.0 (X11; Linux x86_64; rv:81.0) Gecko/20100101 Firefox/81.0'
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if not session:
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print('WARN: no session specified for getRSS')
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try:
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result = session.get(url, headers=sessionHeaders, params=sessionParams)
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return xmlStrToDict(result.text)
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except requests.exceptions.RequestException as e:
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print('ERROR: getRSS failed\nurl: ' + str(url) + '\n' +
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'headers: ' + str(sessionHeaders) + '\n' +
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'params: ' + str(sessionParams) + '\n')
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print(e)
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except ValueError as e:
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print('ERROR: getRSS failed\nurl: ' + str(url) + '\n' +
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'headers: ' + str(sessionHeaders) + '\n' +
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'params: ' + str(sessionParams) + '\n')
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print(e)
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except SocketError as e:
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if e.errno == errno.ECONNRESET:
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print('WARN: connection was reset during getRSS')
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print(e)
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return None
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def getRSSfromDict(baseDir: str, newswire: {},
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httpPrefix: str, domainFull: str,
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title: str, translate: {}) -> str:
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"""Returns an rss feed from the current newswire dict.
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This allows other instances to subscribe to the same newswire
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"""
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rssStr = rss2Header(httpPrefix,
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None, domainFull,
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'Newswire', translate)
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for published, fields in newswire.items():
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published = published.replace('+00:00', 'Z').strip()
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published = published.replace(' ', 'T')
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try:
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pubDate = datetime.strptime(published, "%Y-%m-%dT%H:%M:%SZ")
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except BaseException:
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continue
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rssStr += '<item>\n'
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rssStr += ' <title>' + fields[0] + '</title>\n'
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rssStr += ' <link>' + fields[1] + '</link>\n'
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rssDateStr = pubDate.strftime("%a, %d %b %Y %H:%M:%S UT")
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rssStr += ' <pubDate>' + rssDateStr + '</pubDate>\n'
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rssStr += '</item>\n'
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rssStr += rss2Footer()
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return rssStr
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def isaBlogPost(postJsonObject: {}) -> bool:
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"""Is the given object a blog post?
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"""
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if not postJsonObject:
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return False
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if not postJsonObject.get('object'):
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return False
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if not isinstance(postJsonObject['object'], dict):
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return False
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if postJsonObject['object'].get('summary') and \
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postJsonObject['object'].get('url') and \
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postJsonObject['object'].get('published'):
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return True
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return False
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def updateNewswireModerationQueue(baseDir: str, handle: str,
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maxBlogsPerAccount: int,
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moderationDict: {}) -> None:
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"""Puts new blog posts by untrusted accounts into a moderation queue
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"""
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accountDir = os.path.join(baseDir + '/accounts', handle)
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indexFilename = accountDir + '/tlblogs.index'
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if not os.path.isfile(indexFilename):
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return
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nickname = handle.split('@')[0]
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domain = handle.split('@')[1]
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with open(indexFilename, 'r') as indexFile:
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postFilename = 'start'
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ctr = 0
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while postFilename:
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postFilename = indexFile.readline()
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if postFilename:
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# if this is a full path then remove the directories
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if '/' in postFilename:
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postFilename = postFilename.split('/')[-1]
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# filename of the post without any extension or path
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# This should also correspond to any index entry in
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# the posts cache
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postUrl = \
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postFilename.replace('\n', '').replace('\r', '')
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postUrl = postUrl.replace('.json', '').strip()
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# read the post from file
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fullPostFilename = \
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locatePost(baseDir, nickname,
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domain, postUrl, False)
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if not fullPostFilename:
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print('Unable to locate post ' + postUrl)
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ctr += 1
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if ctr >= maxBlogsPerAccount:
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break
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continue
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moderationStatusFilename = fullPostFilename + '.moderate'
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moderationStatusStr = ''
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if not os.path.isfile(moderationStatusFilename):
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# create a file used to keep track of moderation status
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moderationStatusStr = '[waiting]'
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statusFile = open(moderationStatusFilename, "w+")
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if statusFile:
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statusFile.write(moderationStatusStr)
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statusFile.close()
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else:
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# read the moderation status file
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statusFile = open(moderationStatusFilename, "r")
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if statusFile:
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moderationStatusStr = statusFile.read()
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statusFile.close()
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# if the post is still in the moderation queue
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if '[accepted]' not in \
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open(moderationStatusFilename).read():
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if '[rejected]' not in \
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open(moderationStatusFilename).read():
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# load the post and add its details to the
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# moderation queue
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postJsonObject = None
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if fullPostFilename:
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postJsonObject = loadJson(fullPostFilename)
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if isaBlogPost(postJsonObject):
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published = postJsonObject['object']['published']
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published = published.replace('T', ' ')
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published = published.replace('Z', '+00:00')
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moderationDict[published] = \
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[postJsonObject['object']['summary'],
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postJsonObject['object']['url'],
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nickname, moderationStatusStr,
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fullPostFilename]
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ctr += 1
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if ctr >= maxBlogsPerAccount:
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break
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def addAccountBlogsToNewswire(baseDir: str, nickname: str, domain: str,
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newswire: {},
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maxBlogsPerAccount: int,
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indexFilename: str) -> None:
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"""Adds blogs for the given account to the newswire
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"""
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if not os.path.isfile(indexFilename):
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return
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with open(indexFilename, 'r') as indexFile:
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postFilename = 'start'
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ctr = 0
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while postFilename:
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postFilename = indexFile.readline()
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if postFilename:
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# if this is a full path then remove the directories
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if '/' in postFilename:
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postFilename = postFilename.split('/')[-1]
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# filename of the post without any extension or path
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# This should also correspond to any index entry in
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# the posts cache
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postUrl = \
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postFilename.replace('\n', '').replace('\r', '')
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postUrl = postUrl.replace('.json', '').strip()
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# read the post from file
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fullPostFilename = \
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locatePost(baseDir, nickname,
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domain, postUrl, False)
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if not fullPostFilename:
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print('Unable to locate post ' + postUrl)
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ctr += 1
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if ctr >= maxBlogsPerAccount:
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break
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continue
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postJsonObject = None
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if fullPostFilename:
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postJsonObject = loadJson(fullPostFilename)
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if isaBlogPost(postJsonObject):
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published = postJsonObject['object']['published']
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published = published.replace('T', ' ')
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published = published.replace('Z', '+00:00')
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newswire[published] = \
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[postJsonObject['object']['summary'],
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postJsonObject['object']['url']]
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ctr += 1
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if ctr >= maxBlogsPerAccount:
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break
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def isTrustedByNewswire(baseDir: str, nickname: str) -> bool:
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"""Returns true if the given nickname is trusted to post
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blog entries to the newswire
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"""
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# adminNickname = getConfigParam(baseDir, 'admin')
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# if nickname == adminNickname:
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# return True
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newswireTrustedFilename = baseDir + '/accounts/newswiretrusted.txt'
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if os.path.isfile(newswireTrustedFilename):
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with open(newswireTrustedFilename, "r") as f:
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lines = f.readlines()
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for trusted in lines:
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if trusted.strip('\n').strip('\r') == nickname:
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return True
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return False
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def addBlogsToNewswire(baseDir: str, newswire: {},
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maxBlogsPerAccount: int) -> None:
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"""Adds blogs from each user account into the newswire
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"""
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moderationDict = {}
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# go through each account
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for subdir, dirs, files in os.walk(baseDir + '/accounts'):
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for handle in dirs:
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if '@' not in handle:
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continue
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if 'inbox@' in handle:
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continue
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nickname = handle.split('@')[0]
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# has this account been suspended?
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if isSuspended(baseDir, nickname):
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continue
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# is this account trusted?
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if not isTrustedByNewswire(baseDir, nickname):
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updateNewswireModerationQueue(baseDir, handle, 5,
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moderationDict)
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continue
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# is there a blogs timeline for this account?
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accountDir = os.path.join(baseDir + '/accounts', handle)
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blogsIndex = accountDir + '/tlblogs.index'
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if os.path.isfile(blogsIndex):
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domain = handle.split('@')[1]
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addAccountBlogsToNewswire(baseDir, nickname, domain,
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newswire, maxBlogsPerAccount,
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blogsIndex)
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# sort the moderation dict into chronological order, latest first
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sortedModerationDict = \
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OrderedDict(sorted(moderationDict.items(), reverse=True))
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# save the moderation queue details for later display
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newswireModerationFilename = baseDir + '/accounts/newswiremoderation.txt'
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if sortedModerationDict:
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saveJson(sortedModerationDict, newswireModerationFilename)
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else:
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# remove the file if there is nothing to moderate
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if os.path.isfile(newswireModerationFilename):
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os.remove(newswireModerationFilename)
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def getDictFromNewswire(session, baseDir: str) -> {}:
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"""Gets rss feeds as a dictionary from newswire file
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"""
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subscriptionsFilename = baseDir + '/accounts/newswire.txt'
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if not os.path.isfile(subscriptionsFilename):
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return {}
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# add rss feeds
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rssFeed = []
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with open(subscriptionsFilename, 'r') as fp:
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rssFeed = fp.readlines()
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result = {}
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for url in rssFeed:
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url = url.strip()
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if '://' not in url:
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continue
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if url.startswith('#'):
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continue
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itemsList = getRSS(session, url)
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for dateStr, item in itemsList.items():
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result[dateStr] = item
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# add blogs from each user account
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addBlogsToNewswire(baseDir, result, 5)
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# sort into chronological order, latest first
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sortedResult = OrderedDict(sorted(result.items(), reverse=True))
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return sortedResult
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def runNewswireDaemon(baseDir: str, httpd, unused: str):
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"""Periodically updates RSS feeds
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"""
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# initial sleep to allow the system to start up
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time.sleep(50)
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while True:
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# has the session been created yet?
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if not httpd.session:
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print('Newswire daemon waiting for session')
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time.sleep(60)
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continue
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# try to update the feeds
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newNewswire = None
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try:
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newNewswire = getDictFromNewswire(httpd.session, baseDir)
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except Exception as e:
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print('WARN: unable to update newswire ' + str(e))
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time.sleep(120)
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continue
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httpd.newswire = newNewswire
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print('Newswire updated')
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# wait a while before the next feeds update
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time.sleep(1200)
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def runNewswireWatchdog(projectVersion: str, httpd) -> None:
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"""This tries to keep the newswire update thread running even if it dies
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"""
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print('Starting newswire watchdog')
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newswireOriginal = \
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httpd.thrPostSchedule.clone(runNewswireDaemon)
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httpd.thrNewswireDaemon.start()
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while True:
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time.sleep(50)
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if not httpd.thrNewswireDaemon.isAlive():
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httpd.thrNewswireDaemon.kill()
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httpd.thrNewswireDaemon = \
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newswireOriginal.clone(runNewswireDaemon)
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httpd.thrNewswireDaemon.start()
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print('Restarting newswire daemon...')
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