forked from indymedia/epicyon
720 lines
26 KiB
Python
720 lines
26 KiB
Python
__filename__ = "content.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 email.parser
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from shutil import copyfile
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from utils import loadJson
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from utils import fileLastModified
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def switchWords(baseDir: str, nickname: str, domain: str, content: str) -> str:
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"""Performs word replacements. eg. Trump -> The Orange Menace
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"""
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switchWordsFilename = baseDir + '/accounts/' + \
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nickname + '@' + domain + '/replacewords.txt'
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if not os.path.isfile(switchWordsFilename):
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return content
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with open(switchWordsFilename, 'r') as fp:
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for line in fp:
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replaceStr = line.replace('\n', '').replace('\r', '')
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wordTransform = None
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if '->' in replaceStr:
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wordTransform = replaceStr.split('->')
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elif ':' in replaceStr:
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wordTransform = replaceStr.split(':')
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elif ',' in replaceStr:
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wordTransform = replaceStr.split(',')
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elif ';' in replaceStr:
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wordTransform = replaceStr.split(';')
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elif '-' in replaceStr:
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wordTransform = replaceStr.split('-')
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if not wordTransform:
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continue
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if len(wordTransform) == 2:
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replaceStr1 = wordTransform[0].strip().replace('"', '')
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replaceStr2 = wordTransform[1].strip().replace('"', '')
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content = content.replace(replaceStr1, replaceStr2)
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return content
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def replaceEmojiFromTags(content: str, tag: [], messageType: str) -> str:
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"""Uses the tags to replace :emoji: with html image markup
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"""
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for tagItem in tag:
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if not tagItem.get('type'):
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continue
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if tagItem['type'] != 'Emoji':
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continue
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if not tagItem.get('name'):
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continue
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if not tagItem.get('icon'):
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continue
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if not tagItem['icon'].get('url'):
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continue
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if '/' not in tagItem['icon']['url']:
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continue
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if tagItem['name'] not in content:
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continue
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iconName = tagItem['icon']['url'].split('/')[-1]
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if iconName:
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if len(iconName) > 1:
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if iconName[0].isdigit():
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if '.' in iconName:
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iconName = iconName.split('.')[0]
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# see https://unicode.org/
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# emoji/charts/full-emoji-list.html
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if '-' not in iconName:
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# a single code
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try:
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replaceChar = chr(int("0x" + iconName, 16))
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content = content.replace(tagItem['name'],
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replaceChar)
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except BaseException:
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pass
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else:
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# sequence of codes
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iconCodes = iconName.split('-')
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iconCodeSequence = ''
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for icode in iconCodes:
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try:
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iconCodeSequence += chr(int("0x" +
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icode, 16))
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except BaseException:
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iconCodeSequence = ''
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break
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if iconCodeSequence:
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content = content.replace(tagItem['name'],
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iconCodeSequence)
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htmlClass = 'emoji'
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if messageType == 'post header':
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htmlClass = 'emojiheader'
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if messageType == 'profile':
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htmlClass = 'emojiprofile'
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emojiHtml = "<img src=\"" + tagItem['icon']['url'] + "\" alt=\"" + \
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tagItem['name'].replace(':', '') + \
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"\" align=\"middle\" class=\"" + htmlClass + "\"/>"
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content = content.replace(tagItem['name'], emojiHtml)
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return content
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def addMusicTag(content: str, tag: str) -> str:
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"""If a music link is found then ensure that the post is
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tagged appropriately
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"""
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if '#' not in tag:
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tag = '#'+tag
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if tag in content:
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return content
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musicSites = ['soundcloud.com', 'bandcamp.com']
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musicSiteFound = False
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for site in musicSites:
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if site+'/' in content:
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musicSiteFound = True
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break
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if not musicSiteFound:
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return content
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return ':music: ' + content + ' ' + tag + ' '
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def addWebLinks(content: str) -> str:
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"""Adds markup for web links
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"""
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if not ('https://' in content or 'http://' in content):
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return content
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maxLinkLength = 40
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content = content.replace('\r', '')
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words = content.replace('\n', ' --linebreak-- ').split(' ')
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replaceDict = {}
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for w in words:
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if w.startswith('https://') or \
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w.startswith('http://') or \
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w.startswith('i2p://') or \
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w.startswith('gemini://') or \
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w.startswith('gopher://') or \
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w.startswith('hyper://') or \
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w.startswith('dat://'):
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if w.endswith('.') or w.endswith(';'):
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w = w[:-1]
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markup = '<a href="' + w + \
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'" rel="nofollow noopener" target="_blank">'
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if w.startswith('https://'):
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markup += '<span class="invisible">https://</span>'
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elif w.startswith('http://'):
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markup += '<span class="invisible">http://</span>'
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elif w.startswith('i2p://'):
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markup += '<span class="invisible">i2p://</span>'
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elif w.startswith('dat://'):
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markup += '<span class="invisible">dat://</span>'
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elif w.startswith('hyper://'):
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markup += '<span class="invisible">hyper://</span>'
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elif w.startswith('gemini://'):
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markup += '<span class="invisible">gemini://</span>'
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elif w.startswith('gopher://'):
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markup += '<span class="invisible">gopher://</span>'
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linkText = w.replace('https://', '').replace('http://', '')
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linkText = linkText.replace('dat://', '').replace('i2p://', '')
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linkText = linkText.replace('hyper://', '')
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linkText = linkText.replace('gemini://', '')
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linkText = linkText.replace('gopher://', '')
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# prevent links from becoming too long
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if len(linkText) > maxLinkLength:
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markup += '<span class="ellipsis">' + \
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linkText[:maxLinkLength] + '</span>'
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markup += '<span class="invisible">' + \
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linkText[maxLinkLength:] + '</span></a>'
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else:
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markup += '<span class="ellipsis">' + linkText + '</span></a>'
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replaceDict[w] = markup
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for url, markup in replaceDict.items():
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content = content.replace(url, markup)
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content = content.replace(' --linebreak-- ', '<br>')
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return content
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def validHashTag(hashtag: str) -> bool:
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"""Returns true if the give hashtag contains valid characters
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"""
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validChars = set('0123456789' +
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'abcdefghijklmnopqrstuvwxyz' +
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'ABCDEFGHIJKLMNOPQRSTUVWXYZ')
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if set(hashtag).issubset(validChars):
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return True
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return False
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def addHashTags(wordStr: str, httpPrefix: str, domain: str,
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replaceHashTags: {}, postHashtags: {}) -> bool:
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"""Detects hashtags and adds them to the replacements dict
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Also updates the hashtags list to be added to the post
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"""
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if replaceHashTags.get(wordStr):
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return True
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hashtag = wordStr[1:]
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if not validHashTag(hashtag):
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return False
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hashtagUrl = httpPrefix + "://" + domain + "/tags/" + hashtag
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postHashtags[hashtag] = {
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'href': hashtagUrl,
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'name': '#'+hashtag,
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'type': 'Hashtag'
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}
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replaceHashTags[wordStr] = "<a href=\"" + hashtagUrl + \
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"\" class=\"mention hashtag\" rel=\"tag\">#<span>" + \
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hashtag + "</span></a>"
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return True
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def loadEmojiDict(emojiDataFilename: str, emojiDict: {}) -> None:
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"""Creates an emoji dictionary based on emoji/emoji-data.txt
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"""
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if not os.path.isfile(emojiDataFilename):
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return
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with open(emojiDataFilename, "r") as fileHandler:
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for line in fileHandler:
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if len(line) < 5:
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continue
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if line.startswith('#'):
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continue
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if '; Emoji' not in line:
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continue
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if ')' not in line:
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continue
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emojiUnicode = line.split(' ')[0]
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if len(emojiUnicode) < 4:
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continue
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if '..' in emojiUnicode:
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emojiUnicode = emojiUnicode.split('..')[0]
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emojiName = line.split(')', 1)[1].strip()
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emojiName = emojiName.replace('\n', '').replace('\r', '')
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emojiName = emojiName.replace(' ', '').replace('-', '')
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if '..' in emojiName:
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emojiName = emojiName.split('..')[0]
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emojiDict[emojiName.lower()] = emojiUnicode
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def addEmoji(baseDir: str, wordStr: str,
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httpPrefix: str, domain: str,
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replaceEmoji: {}, postTags: {},
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emojiDict: {}) -> bool:
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"""Detects Emoji and adds them to the replacements dict
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Also updates the tags list to be added to the post
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"""
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if not wordStr.startswith(':'):
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return False
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if not wordStr.endswith(':'):
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return False
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if len(wordStr) < 3:
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return False
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if replaceEmoji.get(wordStr):
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return True
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# remove leading and trailing : characters
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emoji = wordStr[1:]
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emoji = emoji[:-1]
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# is the text of the emoji valid?
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if not validHashTag(emoji):
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return False
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if not emojiDict.get(emoji):
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return False
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emojiFilename = baseDir + '/emoji/' + emojiDict[emoji] + '.png'
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if not os.path.isfile(emojiFilename):
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return False
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emojiUrl = httpPrefix + "://" + domain + \
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"/emoji/" + emojiDict[emoji] + '.png'
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postTags[emoji] = {
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'icon': {
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'mediaType': 'image/png',
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'type': 'Image',
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'url': emojiUrl
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},
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'name': ':'+emoji+':',
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"updated": fileLastModified(emojiFilename),
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"id": emojiUrl.replace('.png', ''),
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'type': 'Emoji'
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}
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return True
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def addMention(wordStr: str, httpPrefix: str, following: str,
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replaceMentions: {}, recipients: [], tags: {}) -> bool:
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"""Detects mentions and adds them to the replacements dict and
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recipients list
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"""
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possibleHandle = wordStr[1:]
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# @nick
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if following and '@' not in possibleHandle:
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# fall back to a best effort match against the following list
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# if no domain was specified. eg. @nick
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possibleNickname = possibleHandle
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for follow in following:
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if follow.startswith(possibleNickname + '@'):
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replaceDomain = \
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follow.replace('\n', '').replace('\r', '').split('@')[1]
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recipientActor = httpPrefix + "://" + \
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replaceDomain + "/users/" + possibleNickname
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if recipientActor not in recipients:
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recipients.append(recipientActor)
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tags[wordStr] = {
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'href': recipientActor,
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'name': wordStr,
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'type': 'Mention'
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}
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replaceMentions[wordStr] = \
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"<span class=\"h-card\"><a href=\"" + httpPrefix + \
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"://" + replaceDomain + "/@" + possibleNickname + \
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"\" class=\"u-url mention\">@<span>" + possibleNickname + \
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"</span></a></span>"
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return True
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return False
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possibleNickname = None
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possibleDomain = None
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if '@' not in possibleHandle:
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return False
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possibleNickname = possibleHandle.split('@')[0]
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if not possibleNickname:
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return False
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possibleDomain = \
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possibleHandle.split('@')[1].strip('\n').strip('\r')
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if not possibleDomain:
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return False
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if following:
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for follow in following:
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if follow.replace('\n', '').replace('\r', '') != possibleHandle:
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continue
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recipientActor = httpPrefix + "://" + \
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possibleDomain + "/users/" + possibleNickname
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if recipientActor not in recipients:
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recipients.append(recipientActor)
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tags[wordStr] = {
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'href': recipientActor,
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'name': wordStr,
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'type': 'Mention'
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}
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replaceMentions[wordStr] = \
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"<span class=\"h-card\"><a href=\"" + httpPrefix + \
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"://" + possibleDomain + "/@" + possibleNickname + \
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"\" class=\"u-url mention\">@<span>" + possibleNickname + \
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"</span></a></span>"
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return True
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# @nick@domain
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if not (possibleDomain == 'localhost' or '.' in possibleDomain):
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return False
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recipientActor = httpPrefix + "://" + \
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possibleDomain + "/users/" + possibleNickname
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if recipientActor not in recipients:
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recipients.append(recipientActor)
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tags[wordStr] = {
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'href': recipientActor,
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'name': wordStr,
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'type': 'Mention'
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}
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replaceMentions[wordStr] = \
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"<span class=\"h-card\"><a href=\"" + httpPrefix + \
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"://" + possibleDomain + "/@" + possibleNickname + \
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"\" class=\"u-url mention\">@<span>" + possibleNickname + \
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"</span></a></span>"
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return True
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def replaceContentDuplicates(content: str) -> str:
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"""Replaces invalid duplicates within content
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"""
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while '<<' in content:
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content = content.replace('<<', '<')
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while '>>' in content:
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content = content.replace('>>', '>')
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content = content.replace('<\\p>', '')
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return content
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def removeLongWords(content: str, maxWordLength: int,
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longWordsList: []) -> str:
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"""Breaks up long words so that on mobile screens this doesn't
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disrupt the layout
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"""
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content = replaceContentDuplicates(content)
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if ' ' not in content:
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# handle a single very long string with no spaces
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contentStr = content.replace('<p>', '').replace(r'<\p>', '')
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if '://' not in contentStr:
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if len(contentStr) > maxWordLength:
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if '<p>' in content:
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content = '<p>' + contentStr[:maxWordLength] + r'<\p>'
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else:
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content = content[:maxWordLength]
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return content
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words = content.split(' ')
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if not longWordsList:
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longWordsList = []
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for wordStr in words:
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if len(wordStr) > maxWordLength:
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if wordStr not in longWordsList:
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longWordsList.append(wordStr)
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for wordStr in longWordsList:
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if wordStr.startswith('<'):
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continue
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if len(wordStr) == 76:
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if wordStr.upper() == wordStr:
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# tox address
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continue
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if '=\"' in wordStr:
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continue
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if '@' in wordStr:
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if '@@' not in wordStr:
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continue
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if '=.ed25519' in wordStr:
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continue
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if '.onion' in wordStr:
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continue
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if '.i2p' in wordStr:
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continue
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if 'https:' in wordStr:
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continue
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elif 'http:' in wordStr:
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continue
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elif 'i2p:' in wordStr:
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continue
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elif 'dat:' in wordStr:
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continue
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elif 'hyper:' in wordStr:
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continue
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elif 'briar:' in wordStr:
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continue
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if '<' in wordStr:
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replaceWord = wordStr.split('<', 1)[0]
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content = content.replace(wordStr, replaceWord)
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wordStr = replaceWord
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if '/' in wordStr:
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continue
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if len(wordStr[maxWordLength:]) < maxWordLength:
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content = content.replace(wordStr,
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wordStr[:maxWordLength] + '\n' +
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wordStr[maxWordLength:])
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else:
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content = content.replace(wordStr,
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wordStr[:maxWordLength])
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if content.startswith('<p>'):
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if not content.endswith('</p>'):
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content = content.strip()+'</p>'
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return content
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def addHtmlTags(baseDir: str, httpPrefix: str,
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nickname: str, domain: str, content: str,
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recipients: [], hashtags: {}, isJsonContent=False) -> str:
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""" Replaces plaintext mentions such as @nick@domain into html
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by matching against known following accounts
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"""
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if content.startswith('<p>'):
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return content
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maxWordLength = 40
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content = content.replace('\r', '')
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content = content.replace('\n', ' --linebreak-- ')
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content = addMusicTag(content, 'nowplaying')
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words = content.replace(',', ' ').replace(';', ' ').split(' ')
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# remove . for words which are not mentions
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newWords = []
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for wordIndex in range(0, len(words)):
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wordStr = words[wordIndex]
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if wordStr.endswith('.'):
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if not wordStr.startswith('@'):
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wordStr = wordStr[:-1]
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if wordStr.startswith('.'):
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wordStr = wordStr[1:]
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newWords.append(wordStr)
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words = newWords
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replaceMentions = {}
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replaceHashTags = {}
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replaceEmoji = {}
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emojiDict = {}
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originalDomain = domain
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if ':' in domain:
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domain = domain.split(':')[0]
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followingFilename = baseDir + '/accounts/' + \
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nickname + '@' + domain + '/following.txt'
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# read the following list so that we can detect just @nick
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# in addition to @nick@domain
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following = None
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if '@' in words:
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if os.path.isfile(followingFilename):
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with open(followingFilename, "r") as f:
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following = f.readlines()
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# extract mentions and tags from words
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longWordsList = []
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for wordStr in words:
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wordLen = len(wordStr)
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if wordLen > 2:
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if wordLen > maxWordLength:
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longWordsList.append(wordStr)
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firstChar = wordStr[0]
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if firstChar == '@':
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if addMention(wordStr, httpPrefix, following,
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replaceMentions, recipients, hashtags):
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continue
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elif firstChar == '#':
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if addHashTags(wordStr, httpPrefix, originalDomain,
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replaceHashTags, hashtags):
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continue
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elif ':' in wordStr:
|
|
wordStr2 = wordStr.split(':')[1]
|
|
# print('TAG: emoji located - '+wordStr)
|
|
if not emojiDict:
|
|
# emoji.json is generated so that it can be customized and
|
|
# the changes will be retained even if default_emoji.json
|
|
# is subsequently updated
|
|
if not os.path.isfile(baseDir + '/emoji/emoji.json'):
|
|
copyfile(baseDir + '/emoji/default_emoji.json',
|
|
baseDir + '/emoji/emoji.json')
|
|
emojiDict = loadJson(baseDir + '/emoji/emoji.json')
|
|
|
|
# print('TAG: looking up emoji for :'+wordStr2+':')
|
|
addEmoji(baseDir, ':' + wordStr2 + ':', httpPrefix,
|
|
originalDomain, replaceEmoji, hashtags,
|
|
emojiDict)
|
|
|
|
# replace words with their html versions
|
|
for wordStr, replaceStr in replaceMentions.items():
|
|
content = content.replace(wordStr, replaceStr)
|
|
for wordStr, replaceStr in replaceHashTags.items():
|
|
content = content.replace(wordStr, replaceStr)
|
|
if not isJsonContent:
|
|
for wordStr, replaceStr in replaceEmoji.items():
|
|
content = content.replace(wordStr, replaceStr)
|
|
|
|
content = addWebLinks(content)
|
|
if longWordsList:
|
|
content = removeLongWords(content, maxWordLength, longWordsList)
|
|
content = content.replace(' --linebreak-- ', '</p><p>')
|
|
return '<p>' + content + '</p>'
|
|
|
|
|
|
def getMentionsFromHtml(htmlText: str,
|
|
matchStr="<span class=\"h-card\"><a href=\"") -> []:
|
|
"""Extracts mentioned actors from the given html content string
|
|
"""
|
|
mentions = []
|
|
if matchStr not in htmlText:
|
|
return mentions
|
|
mentionsList = htmlText.split(matchStr)
|
|
for mentionStr in mentionsList:
|
|
if '"' not in mentionStr:
|
|
continue
|
|
actorStr = mentionStr.split('"')[0]
|
|
if actorStr.startswith('http') or \
|
|
actorStr.startswith('i2p') or \
|
|
actorStr.startswith('hyper') or \
|
|
actorStr.startswith('dat:'):
|
|
if actorStr not in mentions:
|
|
mentions.append(actorStr)
|
|
return mentions
|
|
|
|
|
|
def extractMediaInFormPOST(postBytes, boundary, name: str):
|
|
"""Extracts the binary encoding for image/video/audio within a http
|
|
form POST
|
|
Returns the media bytes and the remaining bytes
|
|
"""
|
|
imageStartBoundary = b'Content-Disposition: form-data; name="' + \
|
|
name.encode('utf8', 'ignore') + b'";'
|
|
imageStartLocation = postBytes.find(imageStartBoundary)
|
|
if imageStartLocation == -1:
|
|
return None, postBytes
|
|
|
|
# bytes after the start boundary appears
|
|
mediaBytes = postBytes[imageStartLocation:]
|
|
|
|
# look for the next boundary
|
|
imageEndBoundary = boundary.encode('utf8', 'ignore')
|
|
imageEndLocation = mediaBytes.find(imageEndBoundary)
|
|
if imageEndLocation == -1:
|
|
# no ending boundary
|
|
return mediaBytes, postBytes[:imageStartLocation]
|
|
|
|
# remaining bytes after the end of the image
|
|
remainder = mediaBytes[imageEndLocation:]
|
|
|
|
# remove bytes after the end boundary
|
|
mediaBytes = mediaBytes[:imageEndLocation]
|
|
|
|
# return the media and the before+after bytes
|
|
return mediaBytes, postBytes[:imageStartLocation] + remainder
|
|
|
|
|
|
def saveMediaInFormPOST(mediaBytes, debug: bool,
|
|
filenameBase=None) -> (str, str):
|
|
"""Saves the given media bytes extracted from http form POST
|
|
Returns the filename and attachment type
|
|
"""
|
|
if not mediaBytes:
|
|
if debug:
|
|
print('DEBUG: No media found within POST')
|
|
return None, None
|
|
|
|
mediaLocation = -1
|
|
searchStr = ''
|
|
startPos = 0
|
|
filename = None
|
|
|
|
# directly search the binary array for the beginning
|
|
# of an image
|
|
extensionList = {
|
|
'png': 'image/png',
|
|
'jpeg': 'image/jpeg',
|
|
'gif': 'image/gif',
|
|
'webp': 'image/webp',
|
|
'mp4': 'video/mp4',
|
|
'ogv': 'video/ogv',
|
|
'mp3': 'audio/mpeg',
|
|
'ogg': 'audio/ogg',
|
|
'wOFF': 'application/font-woff',
|
|
'wOF2': 'application/font-woff2',
|
|
'ttf': 'application/x-font-truetype',
|
|
'OTTO': 'application/x-font-opentype'
|
|
}
|
|
detectedExtension = None
|
|
for extension, contentType in extensionList.items():
|
|
searchStr = b'Content-Type: ' + contentType.encode('utf8', 'ignore')
|
|
mediaLocation = mediaBytes.find(searchStr)
|
|
if mediaLocation > -1:
|
|
# image/video/audio binaries
|
|
if extension == 'jpeg':
|
|
extension = 'jpg'
|
|
elif extension == 'mpeg':
|
|
extension = 'mp3'
|
|
filename = filenameBase + '.' + extension
|
|
attachmentMediaType = \
|
|
searchStr.decode().split('/')[0].replace('Content-Type: ', '')
|
|
detectedExtension = extension
|
|
break
|
|
else:
|
|
# font binaries
|
|
searchStr = extension.encode('utf8', 'ignore')
|
|
mediaLocation = mediaBytes.find(searchStr)
|
|
if mediaLocation > -1:
|
|
if extension == 'wOFF':
|
|
detectedExtension = 'woff'
|
|
elif extension == 'wOF2':
|
|
detectedExtension = 'woff2'
|
|
elif extension == 'OTTO':
|
|
detectedExtension = 'otf'
|
|
break
|
|
|
|
if not filename:
|
|
return None, None
|
|
|
|
# locate the beginning of the image, after any
|
|
# carriage returns
|
|
startPos = mediaLocation + len(searchStr)
|
|
for offset in range(1, 8):
|
|
if mediaBytes[startPos+offset] != 10:
|
|
if mediaBytes[startPos+offset] != 13:
|
|
startPos += offset
|
|
break
|
|
|
|
# remove any existing image files with a different format
|
|
extensionTypes = ('png', 'jpg', 'jpeg', 'gif', 'webp',
|
|
'woff', 'woff2', 'ttf', 'otf')
|
|
for ex in extensionTypes:
|
|
if ex == detectedExtension:
|
|
continue
|
|
possibleOtherFormat = \
|
|
filename.replace('.temp', '').replace('.' +
|
|
detectedExtension, '.' +
|
|
ex)
|
|
if os.path.isfile(possibleOtherFormat):
|
|
os.remove(possibleOtherFormat)
|
|
|
|
fd = open(filename, 'wb')
|
|
fd.write(mediaBytes[startPos:])
|
|
fd.close()
|
|
|
|
return filename, attachmentMediaType
|
|
|
|
|
|
def extractTextFieldsInPOST(postBytes, boundary, debug: bool) -> {}:
|
|
"""Returns a dictionary containing the text fields of a http form POST
|
|
The boundary argument comes from the http header
|
|
"""
|
|
msg = email.parser.BytesParser().parsebytes(postBytes)
|
|
if debug:
|
|
print('DEBUG: POST arriving ' +
|
|
msg.get_payload(decode=True).decode('utf-8'))
|
|
messageFields = msg.get_payload(decode=True)
|
|
messageFields = messageFields.decode('utf-8').split(boundary)
|
|
fields = {}
|
|
# examine each section of the POST, separated by the boundary
|
|
for f in messageFields:
|
|
if f == '--':
|
|
continue
|
|
if ' name="' not in f:
|
|
continue
|
|
postStr = f.split(' name="', 1)[1]
|
|
if '"' not in postStr:
|
|
continue
|
|
postKey = postStr.split('"', 1)[0]
|
|
postValueStr = postStr.split('"', 1)[1]
|
|
if ';' in postValueStr:
|
|
continue
|
|
if '\r\n' not in postValueStr:
|
|
continue
|
|
postLines = postValueStr.split('\r\n')
|
|
postValue = ''
|
|
if len(postLines) > 2:
|
|
for line in range(2, len(postLines)-1):
|
|
if line > 2:
|
|
postValue += '\n'
|
|
postValue += postLines[line]
|
|
fields[postKey] = postValue
|
|
return fields
|