mirror of https://gitlab.com/bashrc2/epicyon
432 lines
15 KiB
Python
432 lines
15 KiB
Python
__filename__ = "media.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.2.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@libreserver.org"
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__status__ = "Production"
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__module_group__ = "Timeline"
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import os
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import time
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import datetime
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import subprocess
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import random
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from random import randint
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from hashlib import sha1
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from auth import createPassword
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from utils import get_base_content_from_post
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from utils import get_full_domain
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from utils import getImageExtensions
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from utils import getVideoExtensions
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from utils import getAudioExtensions
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from utils import getMediaExtensions
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from utils import has_object_dict
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from utils import acct_dir
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from shutil import copyfile
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from shutil import rmtree
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from shutil import move
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from city import spoofGeolocation
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def _getBlurHash() -> str:
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"""You may laugh, but this is a lot less computationally intensive,
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especially on large images, while still providing some visual variety
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in the timeline
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"""
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hashes = [
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"UfGuaW01%gRi%MM{azofozo0V@xuozn#ofs.",
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"UFD]o8-;9FIU~qD%j[%M-;j[ofWB?bt7IURj",
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"UyO|v_1#im=s%y#U%OxDwRt3W9R-ogjHj[WX",
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"U96vAQt6H;WBt7ofWBa#MbWBo#j[byaze-oe",
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"UJKA.q01M|IV%LM|RjNGIVj[f6oLjrofaeof",
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"U9MPjn]?~Cxut~.PS1%1xXIo0fEer_$*^jxG",
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"UtLENXWCRjju~qayaeaz00j[ofayIVkCkCfQ",
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"UHGbeg-pbzWZ.ANI$wsQ$H-;E9W?0Nx]?FjE",
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"UcHU%#4n_ND%?bxatRWBIU%MazxtNaRjs:of",
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"ULR:TsWr~6xZofWWf6s-~6oK9eR,oes-WXNJ",
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"U77VQB-:MaMx%L%MogRkMwkCxuoIS*WYjEsl",
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"U%Nm{8R+%MxuE1t6WBNG-=RjoIt6~Vj]RkR*",
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"UCM7u;?boft7oft7ayj[~qt7WBoft7oft7Rj"
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]
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return random.choice(hashes)
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def _replaceSiloDomain(post_json_object: {},
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siloDomain: str, replacementDomain: str,
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system_language: str) -> None:
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"""Replace a silo domain with a replacement domain
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"""
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if not replacementDomain:
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return
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if not has_object_dict(post_json_object):
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return
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if not post_json_object['object'].get('content'):
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return
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contentStr = get_base_content_from_post(post_json_object, system_language)
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if siloDomain not in contentStr:
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return
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contentStr = contentStr.replace(siloDomain, replacementDomain)
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post_json_object['object']['content'] = contentStr
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if post_json_object['object'].get('contentMap'):
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post_json_object['object']['contentMap'][system_language] = contentStr
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def replaceYouTube(post_json_object: {}, replacementDomain: str,
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system_language: str) -> None:
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"""Replace YouTube with a replacement domain
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This denies Google some, but not all, tracking data
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"""
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_replaceSiloDomain(post_json_object, 'www.youtube.com',
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replacementDomain, system_language)
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def replaceTwitter(post_json_object: {}, replacementDomain: str,
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system_language: str) -> None:
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"""Replace Twitter with a replacement domain
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This allows you to view twitter posts without having a twitter account
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"""
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_replaceSiloDomain(post_json_object, 'twitter.com',
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replacementDomain, system_language)
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def _removeMetaData(imageFilename: str, outputFilename: str) -> None:
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"""Attempts to do this with pure python didn't work well,
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so better to use a dedicated tool if one is installed
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"""
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copyfile(imageFilename, outputFilename)
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if not os.path.isfile(outputFilename):
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print('ERROR: unable to remove metadata from ' + imageFilename)
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return
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if os.path.isfile('/usr/bin/exiftool'):
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print('Removing metadata from ' + outputFilename + ' using exiftool')
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os.system('exiftool -all= ' + outputFilename) # nosec
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elif os.path.isfile('/usr/bin/mogrify'):
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print('Removing metadata from ' + outputFilename + ' using mogrify')
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os.system('/usr/bin/mogrify -strip ' + outputFilename) # nosec
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def _spoofMetaData(base_dir: str, nickname: str, domain: str,
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outputFilename: str, spoofCity: str,
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content_license_url: str) -> None:
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"""Spoof image metadata using a decoy model for a given city
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"""
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if not os.path.isfile(outputFilename):
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print('ERROR: unable to spoof metadata within ' + outputFilename)
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return
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# get the random seed used to generate a unique pattern for this account
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decoySeedFilename = acct_dir(base_dir, nickname, domain) + '/decoyseed'
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decoySeed = 63725
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if os.path.isfile(decoySeedFilename):
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with open(decoySeedFilename, 'r') as fp:
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decoySeed = int(fp.read())
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else:
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decoySeed = randint(10000, 10000000000000000)
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try:
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with open(decoySeedFilename, 'w+') as fp:
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fp.write(str(decoySeed))
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except OSError:
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print('EX: unable to write ' + decoySeedFilename)
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if os.path.isfile('/usr/bin/exiftool'):
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print('Spoofing metadata in ' + outputFilename + ' using exiftool')
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curr_timeAdjusted = \
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datetime.datetime.utcnow() - \
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datetime.timedelta(minutes=randint(2, 120))
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published = curr_timeAdjusted.strftime("%Y:%m:%d %H:%M:%S+00:00")
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(latitude, longitude, latitudeRef, longitudeRef,
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camMake, camModel, camSerialNumber) = \
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spoofGeolocation(base_dir, spoofCity, curr_timeAdjusted,
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decoySeed, None, None)
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if os.system('exiftool -artist=@"' + nickname + '@' + domain + '" ' +
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'-Make="' + camMake + '" ' +
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'-Model="' + camModel + '" ' +
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'-Comment="' + str(camSerialNumber) + '" ' +
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'-DateTimeOriginal="' + published + '" ' +
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'-FileModifyDate="' + published + '" ' +
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'-CreateDate="' + published + '" ' +
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'-GPSLongitudeRef=' + longitudeRef + ' ' +
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'-GPSAltitude=0 ' +
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'-GPSLongitude=' + str(longitude) + ' ' +
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'-GPSLatitudeRef=' + latitudeRef + ' ' +
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'-GPSLatitude=' + str(latitude) + ' ' +
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'-copyright="' + content_license_url + '" ' +
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'-Comment="" ' +
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outputFilename) != 0: # nosec
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print('ERROR: exiftool failed to run')
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else:
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print('ERROR: exiftool is not installed')
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return
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def convertImageToLowBandwidth(imageFilename: str) -> None:
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"""Converts an image to a low bandwidth version
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"""
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low_bandwidthFilename = imageFilename + '.low'
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if os.path.isfile(low_bandwidthFilename):
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try:
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os.remove(low_bandwidthFilename)
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except OSError:
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print('EX: convertImageToLowBandwidth unable to delete ' +
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low_bandwidthFilename)
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cmd = \
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'/usr/bin/convert +noise Multiplicative ' + \
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'-evaluate median 10% -dither Floyd-Steinberg ' + \
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'-monochrome ' + imageFilename + ' ' + low_bandwidthFilename
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print('Low bandwidth image conversion: ' + cmd)
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subprocess.call(cmd, shell=True)
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# wait for conversion to happen
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ctr = 0
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while not os.path.isfile(low_bandwidthFilename):
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print('Waiting for low bandwidth image conversion ' + str(ctr))
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time.sleep(0.2)
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ctr += 1
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if ctr > 100:
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print('WARN: timed out waiting for low bandwidth image conversion')
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break
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if os.path.isfile(low_bandwidthFilename):
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try:
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os.remove(imageFilename)
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except OSError:
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print('EX: convertImageToLowBandwidth unable to delete ' +
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imageFilename)
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os.rename(low_bandwidthFilename, imageFilename)
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if os.path.isfile(imageFilename):
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print('Image converted to low bandwidth ' + imageFilename)
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else:
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print('Low bandwidth converted image not found: ' +
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low_bandwidthFilename)
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def processMetaData(base_dir: str, nickname: str, domain: str,
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imageFilename: str, outputFilename: str,
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city: str, content_license_url: str) -> None:
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"""Handles image metadata. This tries to spoof the metadata
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if possible, but otherwise just removes it
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"""
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# first remove the metadata
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_removeMetaData(imageFilename, outputFilename)
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# now add some spoofed data to misdirect surveillance capitalists
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_spoofMetaData(base_dir, nickname, domain, outputFilename, city,
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content_license_url)
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def _isMedia(imageFilename: str) -> bool:
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"""Is the given file a media file?
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"""
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if not os.path.isfile(imageFilename):
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print('WARN: Media file does not exist ' + imageFilename)
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return False
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permittedMedia = getMediaExtensions()
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for m in permittedMedia:
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if imageFilename.endswith('.' + m):
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return True
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print('WARN: ' + imageFilename + ' is not a permitted media type')
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return False
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def createMediaDirs(base_dir: str, mediaPath: str) -> None:
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if not os.path.isdir(base_dir + '/media'):
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os.mkdir(base_dir + '/media')
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if not os.path.isdir(base_dir + '/' + mediaPath):
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os.mkdir(base_dir + '/' + mediaPath)
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def getMediaPath() -> str:
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curr_time = datetime.datetime.utcnow()
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weeksSinceEpoch = int((curr_time - datetime.datetime(1970, 1, 1)).days / 7)
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return 'media/' + str(weeksSinceEpoch)
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def getAttachmentMediaType(filename: str) -> str:
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"""Returns the type of media for the given file
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image, video or audio
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"""
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mediaType = None
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imageTypes = getImageExtensions()
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for mType in imageTypes:
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if filename.endswith('.' + mType):
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return 'image'
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videoTypes = getVideoExtensions()
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for mType in videoTypes:
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if filename.endswith('.' + mType):
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return 'video'
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audioTypes = getAudioExtensions()
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for mType in audioTypes:
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if filename.endswith('.' + mType):
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return 'audio'
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return mediaType
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def _updateEtag(mediaFilename: str) -> None:
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""" calculate the etag, which is a sha1 of the data
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"""
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# only create etags for media
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if '/media/' not in mediaFilename:
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return
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# check that the media exists
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if not os.path.isfile(mediaFilename):
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return
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# read the binary data
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data = None
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try:
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with open(mediaFilename, 'rb') as mediaFile:
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data = mediaFile.read()
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except OSError:
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print('EX: _updateEtag unable to read ' + str(mediaFilename))
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if not data:
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return
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# calculate hash
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etag = sha1(data).hexdigest() # nosec
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# save the hash
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try:
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with open(mediaFilename + '.etag', 'w+') as etagFile:
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etagFile.write(etag)
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except OSError:
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print('EX: _updateEtag unable to write ' +
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str(mediaFilename) + '.etag')
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def attachMedia(base_dir: str, http_prefix: str,
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nickname: str, domain: str, port: int,
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postJson: {}, imageFilename: str,
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mediaType: str, description: str,
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city: str, low_bandwidth: bool,
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content_license_url: str) -> {}:
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"""Attaches media to a json object post
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The description can be None
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"""
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if not _isMedia(imageFilename):
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return postJson
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fileExtension = None
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acceptedTypes = getMediaExtensions()
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for mType in acceptedTypes:
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if imageFilename.endswith('.' + mType):
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if mType == 'jpg':
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mType = 'jpeg'
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if mType == 'mp3':
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mType = 'mpeg'
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fileExtension = mType
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if not fileExtension:
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return postJson
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mediaType = mediaType + '/' + fileExtension
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print('Attached media type: ' + mediaType)
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if fileExtension == 'jpeg':
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fileExtension = 'jpg'
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if mediaType == 'audio/mpeg':
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fileExtension = 'mp3'
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domain = get_full_domain(domain, port)
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mPath = getMediaPath()
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mediaPath = mPath + '/' + createPassword(32) + '.' + fileExtension
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if base_dir:
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createMediaDirs(base_dir, mPath)
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mediaFilename = base_dir + '/' + mediaPath
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mediaPath = \
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mediaPath.replace('media/', 'system/media_attachments/files/', 1)
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attachmentJson = {
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'mediaType': mediaType,
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'name': description,
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'type': 'Document',
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'url': http_prefix + '://' + domain + '/' + mediaPath
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}
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if mediaType.startswith('image/'):
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attachmentJson['blurhash'] = _getBlurHash()
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# find the dimensions of the image and add them as metadata
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attachImageWidth, attachImageHeight = \
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getImageDimensions(imageFilename)
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if attachImageWidth and attachImageHeight:
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attachmentJson['width'] = attachImageWidth
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attachmentJson['height'] = attachImageHeight
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postJson['attachment'] = [attachmentJson]
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if base_dir:
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if mediaType.startswith('image/'):
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if low_bandwidth:
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convertImageToLowBandwidth(imageFilename)
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processMetaData(base_dir, nickname, domain,
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imageFilename, mediaFilename, city,
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content_license_url)
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else:
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copyfile(imageFilename, mediaFilename)
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_updateEtag(mediaFilename)
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return postJson
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def archiveMedia(base_dir: str, archive_directory: str, maxWeeks: int) -> None:
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"""Any media older than the given number of weeks gets archived
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"""
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if maxWeeks == 0:
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return
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curr_time = datetime.datetime.utcnow()
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weeksSinceEpoch = int((curr_time - datetime.datetime(1970, 1, 1)).days/7)
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minWeek = weeksSinceEpoch - maxWeeks
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if archive_directory:
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if not os.path.isdir(archive_directory):
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os.mkdir(archive_directory)
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if not os.path.isdir(archive_directory + '/media'):
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os.mkdir(archive_directory + '/media')
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for subdir, dirs, files in os.walk(base_dir + '/media'):
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for weekDir in dirs:
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if int(weekDir) < minWeek:
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if archive_directory:
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move(os.path.join(base_dir + '/media', weekDir),
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archive_directory + '/media')
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else:
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# archive to /dev/null
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rmtree(os.path.join(base_dir + '/media', weekDir),
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ignore_errors=False, onerror=None)
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break
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def pathIsVideo(path: str) -> bool:
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if path.endswith('.ogv') or \
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path.endswith('.mp4'):
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return True
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return False
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def pathIsAudio(path: str) -> bool:
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if path.endswith('.ogg') or \
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path.endswith('.mp3'):
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return True
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return False
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def getImageDimensions(imageFilename: str) -> (int, int):
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"""Returns the dimensions of an image file
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"""
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try:
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result = subprocess.run(['identify', '-format', '"%wx%h"',
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imageFilename], stdout=subprocess.PIPE)
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except BaseException:
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print('EX: getImageDimensions unable to run identify command')
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return None, None
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if not result:
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return None, None
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dimensionsStr = result.stdout.decode('utf-8').replace('"', '')
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if 'x' not in dimensionsStr:
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return None, None
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widthStr = dimensionsStr.split('x')[0]
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if not widthStr.isdigit():
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return None, None
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heightStr = dimensionsStr.split('x')[1]
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if not heightStr.isdigit():
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return None, None
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return int(widthStr), int(heightStr)
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