__filename__ = "media.py" __author__ = "Bob Mottram" __license__ = "AGPL3+" __version__ = "1.4.0" __maintainer__ = "Bob Mottram" __email__ = "bob@libreserver.org" __status__ = "Production" __module_group__ = "Timeline" import os import time import datetime import subprocess import random from random import randint from hashlib import sha1 from auth import create_password from utils import safe_system_string from utils import get_base_content_from_post from utils import get_full_domain from utils import get_image_extensions from utils import get_video_extensions from utils import get_audio_extensions from utils import get_media_extensions from utils import has_object_dict from utils import acct_dir from shutil import copyfile from shutil import rmtree from shutil import move from city import spoof_geolocation # music file ID3 v1 genres music_genre = { 0: "Blues", 96: "Big Band", 1: "Classic Rock", 97: "Chorus", 2: "Country", 98: "Easy Listening", 3: "Dance", 99: "Acoustic", 4: "Disco", 100: "Humour", 5: "Funk", 101: "Speech", 6: "Grunge", 102: "Chanson", 7: "Hip Hop", 103: "Opera", 8: "Jazz", 104: "Chamber Music", 9: "Metal", 105: "Sonata", 10: "New Age", 106: "Symphony", 11: "Oldies", 107: "Booty Bass", 12: "Other", 108: "Primus", 13: "Pop", 109: "Porn Groove", 14: "RnB", 110: "Satire", 15: "Rap", 111: "Slow Jam", 16: "Reggae", 112: "Club", 17: "Rock", 113: "Tango", 18: "Techno", 114: "Samba", 19: "Industrial", 115: "Folklore", 20: "Alternative", 116: "Ballad", 21: "Ska", 117: "Power Ballad", 22: "Death Metal", 118: "Rhythmic Soul", 23: "Pranks", 119: "Freestyle", 24: "Soundtrack", 120: "Duet", 25: "Euro-Techno", 121: "Punk Rock", 26: "Ambient", 122: "Drum Solo", 27: "Trip Hop", 123: "A Cappella", 28: "Vocal", 124: "Euro House", 29: "Jazz Funk", 125: "Dance Hall", 30: "Fusion", 126: "Goa", 31: "Trance", 127: "Drum and Bass", 32: "Classical", 128: "Club House", 33: "Instrumental", 129: "Hardcore", 34: "Acid", 130: "Terror", 35: "House", 131: "Indie", 36: "Game", 132: "BritPop", 37: "Sound Clip", 133: "Negerpunk", 38: "Gospel", 134: "Polsk Punk", 39: "Noise", 135: "Beat", 40: "AlternRock", 136: "Christian Gangsta Rap", 41: "Bass", 137: "Heavy Metal", 42: "Soul", 138: "Black Metal", 43: "Punk", 139: "Crossover", 44: "Space", 140: "Contemporary Christian", 45: "Meditative", 141: "Christian Rock", 46: "Instrumental Pop", 142: "Merengue", 47: "Instrumental Rock", 143: "Salsa", 48: "Ethnic", 144: "Thrash Metal", 49: "Gothic", 145: "Anime", 50: "Darkwave", 146: "JPop", 51: "Techno Industrial", 147: "Synthpop", 52: "Electronic", 148: "Abstract", 53: "Pop Folk", 149: "Art Rock", 54: "Eurodance", 150: "Baroque", 55: "Dream", 151: "Bhangra", 56: "Southern Rock", 152: "Big Beat", 57: "Comedy", 153: "Breakbeat", 58: "Cult", 154: "Chillout", 59: "Gangsta Rap", 155: "Downtempo", 60: "Top 40", 156: "Dub", 61: "Christian Rap", 157: "EBM", 62: "Pop Funk", 158: "Eclectic", 63: "Jungle", 159: "Electro", 64: "Native American", 160: "Electroclash", 65: "Cabaret", 161: "Emo", 66: "New Wave", 162: "Experimental", 67: "Psychedelic", 163: "Garage", 68: "Rave", 164: "Global", 69: "Showtunes", 165: "IDM", 70: "Trailer", 166: "Illbient", 71: "Lo Fi", 167: "Industro Goth", 72: "Tribal", 168: "Jam Band", 73: "Acid Punk", 169: "Krautrock", 74: "Acid Jazz", 170: "Leftfield", 75: "Polka", 171: "Lounge", 76: "Retro", 172: "Math Rock", 77: "Musical", 173: "New Romantic", 78: "Rock and Roll", 174: "Nu-Breakz", 79: "Hard Rock", 175: "Post Punk", 80: "Folk", 176: "Post Rock", 81: "Folk Rock", 177: "Psytrance", 82: "National Folk", 178: "Shoegaze", 83: "Swing", 179: "Space Rock", 84: "Fast Fusion", 180: "Trop Rock", 85: "Bebob", 181: "World Music", 86: "Latin", 182: "Neoclassical", 87: "Revival", 183: "Audiobook", 88: "Celtic", 184: "Audio Theatre", 89: "Bluegrass", 185: "Neue Deutsche Welle", 90: "Avantgarde", 186: "Podcast", 91: "Gothic Rock", 187: "Indie Rock", 92: "Progressive Rock", 188: "G Funk", 93: "Psychedelic Rock", 189: "Dubstep", 94: "Symphonic Rock", 190: "Garage Rock", 95: "Slow Rock", 191: "Psybient" } def _get_blur_hash() -> str: """You may laugh, but this is a lot less computationally intensive, especially on large images, while still providing some visual variety in the timeline """ hashes = [ "UfGuaW01%gRi%MM{azofozo0V@xuozn#ofs.", "UFD]o8-;9FIU~qD%j[%M-;j[ofWB?bt7IURj", "UyO|v_1#im=s%y#U%OxDwRt3W9R-ogjHj[WX", "U96vAQt6H;WBt7ofWBa#MbWBo#j[byaze-oe", "UJKA.q01M|IV%LM|RjNGIVj[f6oLjrofaeof", "U9MPjn]?~Cxut~.PS1%1xXIo0fEer_$*^jxG", "UtLENXWCRjju~qayaeaz00j[ofayIVkCkCfQ", "UHGbeg-pbzWZ.ANI$wsQ$H-;E9W?0Nx]?FjE", "UcHU%#4n_ND%?bxatRWBIU%MazxtNaRjs:of", "ULR:TsWr~6xZofWWf6s-~6oK9eR,oes-WXNJ", "U77VQB-:MaMx%L%MogRkMwkCxuoIS*WYjEsl", "U%Nm{8R+%MxuE1t6WBNG-=RjoIt6~Vj]RkR*", "UCM7u;?boft7oft7ayj[~qt7WBoft7oft7Rj" ] return random.choice(hashes) def _replace_silo_domain(post_json_object: {}, silo_domain: str, replacement_domain: str, system_language: str) -> None: """Replace a silo domain with a replacement domain """ if not replacement_domain: return if not has_object_dict(post_json_object): return if not post_json_object['object'].get('content'): return content_str = get_base_content_from_post(post_json_object, system_language) if silo_domain not in content_str: return content_str = content_str.replace(silo_domain, replacement_domain) post_json_object['object']['content'] = content_str if post_json_object['object'].get('contentMap'): post_json_object['object']['contentMap'][system_language] = content_str def replace_you_tube(post_json_object: {}, replacement_domain: str, system_language: str) -> None: """Replace YouTube with a replacement domain This denies Google some, but not all, tracking data """ _replace_silo_domain(post_json_object, 'www.youtube.com', replacement_domain, system_language) def replace_twitter(post_json_object: {}, replacement_domain: str, system_language: str) -> None: """Replace Twitter with a replacement domain This allows you to view twitter posts without having a twitter account """ twitter_domains = ('mobile.twitter.com', 'twitter.com') for tw_domain in twitter_domains: _replace_silo_domain(post_json_object, tw_domain, replacement_domain, system_language) def _remove_meta_data(image_filename: str, output_filename: str) -> None: """Attempts to do this with pure python didn't work well, so better to use a dedicated tool if one is installed """ copyfile(image_filename, output_filename) if not os.path.isfile(output_filename): print('ERROR: unable to remove metadata from ' + image_filename) return if os.path.isfile('/usr/bin/exiftool'): print('Removing metadata from ' + output_filename + ' using exiftool') cmd = 'exiftool -all= ' + safe_system_string(output_filename) os.system(cmd) # nosec elif os.path.isfile('/usr/bin/mogrify'): print('Removing metadata from ' + output_filename + ' using mogrify') cmd = \ '/usr/bin/mogrify -strip ' + safe_system_string(output_filename) os.system(cmd) # nosec def _spoof_meta_data(base_dir: str, nickname: str, domain: str, output_filename: str, spoof_city: str, content_license_url: str) -> None: """Spoof image metadata using a decoy model for a given city """ if not os.path.isfile(output_filename): print('ERROR: unable to spoof metadata within ' + output_filename) return # get the random seed used to generate a unique pattern for this account decoy_seed_filename = acct_dir(base_dir, nickname, domain) + '/decoyseed' decoy_seed = 63725 if os.path.isfile(decoy_seed_filename): with open(decoy_seed_filename, 'r', encoding='utf-8') as fp_seed: decoy_seed = int(fp_seed.read()) else: decoy_seed = randint(10000, 10000000000000000) try: with open(decoy_seed_filename, 'w+', encoding='utf-8') as fp_seed: fp_seed.write(str(decoy_seed)) except OSError: print('EX: unable to write ' + decoy_seed_filename) if os.path.isfile('/usr/bin/exiftool'): print('Spoofing metadata in ' + output_filename + ' using exiftool') curr_time_adjusted = \ datetime.datetime.utcnow() - \ datetime.timedelta(minutes=randint(2, 120)) published = curr_time_adjusted.strftime("%Y:%m:%d %H:%M:%S+00:00") (latitude, longitude, latitude_ref, longitude_ref, cam_make, cam_model, cam_serial_number) = \ spoof_geolocation(base_dir, spoof_city, curr_time_adjusted, decoy_seed, None, None) safe_handle = safe_system_string(nickname + '@' + domain) safe_license_url = safe_system_string(content_license_url) if os.system('exiftool -artist=@"' + safe_handle + '" ' + '-Make="' + cam_make + '" ' + '-Model="' + cam_model + '" ' + '-Comment="' + str(cam_serial_number) + '" ' + '-DateTimeOriginal="' + published + '" ' + '-FileModifyDate="' + published + '" ' + '-CreateDate="' + published + '" ' + '-GPSLongitudeRef=' + longitude_ref + ' ' + '-GPSAltitude=0 ' + '-GPSLongitude=' + str(longitude) + ' ' + '-GPSLatitudeRef=' + latitude_ref + ' ' + '-GPSLatitude=' + str(latitude) + ' ' + '-copyright="' + safe_license_url + '" ' + '-Comment="" ' + output_filename) != 0: # nosec print('ERROR: exiftool failed to run') else: print('ERROR: exiftool is not installed') return def get_music_metadata(filename: str) -> {}: """Returns metadata for a music file """ result = None safe_filename = safe_system_string(filename) try: result = subprocess.run(['exiftool', '-v3', safe_filename], stdout=subprocess.PIPE) except BaseException as ex: print('EX: get_music_metadata failed ' + str(ex)) if not result: return {} if not result.stdout: return {} try: id3_lines = result.stdout.decode('utf-8').split('\n') except BaseException: print('EX: get_music_metadata unable to decode output') return {} fieldnames = ( 'Title', 'Artist', 'Genre', 'Track', 'Album', 'Length', 'Band' ) music_metadata = {} for line in id3_lines: for field in fieldnames: if field + ' = ' not in line: continue field_value = line.split(field + ' = ')[1] if '>' in field_value: field_value = field_value.split('>')[0].strip() if ':' in field_value and ' ' in field_value: words = field_value.split(' ') new_value = '' for wrd in words: if ':' not in wrd: new_value += wrd + ' ' field_value = new_value.strip() if field == 'Genre' and field_value.isdigit(): if music_genre.get(int(field_value)): field_value = music_genre[int(field_value)] music_metadata[field.lower()] = field_value return music_metadata def convert_image_to_low_bandwidth(image_filename: str) -> None: """Converts an image to a low bandwidth version """ low_bandwidth_filename = image_filename + '.low' if os.path.isfile(low_bandwidth_filename): try: os.remove(low_bandwidth_filename) except OSError: print('EX: convert_image_to_low_bandwidth unable to delete ' + low_bandwidth_filename) cmd = \ '/usr/bin/convert +noise Multiplicative ' + \ '-evaluate median 10% -dither Floyd-Steinberg ' + \ '-monochrome ' + safe_system_string(image_filename) + \ ' ' + safe_system_string(low_bandwidth_filename) print('Low bandwidth image conversion: ' + cmd) subprocess.call(cmd, shell=True) # wait for conversion to happen ctr = 0 while not os.path.isfile(low_bandwidth_filename): print('Waiting for low bandwidth image conversion ' + str(ctr)) time.sleep(0.2) ctr += 1 if ctr > 100: print('WARN: timed out waiting for low bandwidth image conversion') break if os.path.isfile(low_bandwidth_filename): try: os.remove(image_filename) except OSError: print('EX: convert_image_to_low_bandwidth unable to delete ' + image_filename) os.rename(low_bandwidth_filename, image_filename) if os.path.isfile(image_filename): print('Image converted to low bandwidth ' + image_filename) else: print('Low bandwidth converted image not found: ' + low_bandwidth_filename) def process_meta_data(base_dir: str, nickname: str, domain: str, image_filename: str, output_filename: str, city: str, content_license_url: str) -> None: """Handles image metadata. This tries to spoof the metadata if possible, but otherwise just removes it """ # first remove the metadata _remove_meta_data(image_filename, output_filename) # now add some spoofed data to misdirect surveillance capitalists _spoof_meta_data(base_dir, nickname, domain, output_filename, city, content_license_url) def _is_media(image_filename: str) -> bool: """Is the given file a media file? """ if not os.path.isfile(image_filename): print('WARN: Media file does not exist ' + image_filename) return False permitted_media = get_media_extensions() for permit in permitted_media: if image_filename.endswith('.' + permit): return True print('WARN: ' + image_filename + ' is not a permitted media type') return False def create_media_dirs(base_dir: str, media_path: str) -> None: """Creates stored media directories """ if not os.path.isdir(base_dir + '/media'): os.mkdir(base_dir + '/media') if not os.path.isdir(base_dir + '/' + media_path): os.mkdir(base_dir + '/' + media_path) def get_media_path() -> str: """Returns the path for stored media """ curr_time = datetime.datetime.utcnow() weeks_since_epoch = \ int((curr_time - datetime.datetime(1970, 1, 1)).days / 7) return 'media/' + str(weeks_since_epoch) def get_attachment_media_type(filename: str) -> str: """Returns the type of media for the given file image, video or audio """ media_type = None image_types = get_image_extensions() for mtype in image_types: if filename.endswith('.' + mtype): return 'image' video_types = get_video_extensions() for mtype in video_types: if filename.endswith('.' + mtype): return 'video' audio_types = get_audio_extensions() for mtype in audio_types: if filename.endswith('.' + mtype): return 'audio' return media_type def _update_etag(media_filename: str) -> None: """ calculate the etag, which is a sha1 of the data """ # only create etags for media if '/media/' not in media_filename: return # check that the media exists if not os.path.isfile(media_filename): return # read the binary data data = None try: with open(media_filename, 'rb') as media_file: data = media_file.read() except OSError: print('EX: _update_etag unable to read ' + str(media_filename)) if not data: return # calculate hash etag = sha1(data).hexdigest() # nosec # save the hash try: with open(media_filename + '.etag', 'w+', encoding='utf-8') as efile: efile.write(etag) except OSError: print('EX: _update_etag unable to write ' + str(media_filename) + '.etag') def _store_video_transcript(video_transcript: str, media_filename: str) -> bool: """Stores a video transcript """ video_transcript = video_transcript.strip() if not video_transcript.startswith('WEBVTT') or \ '-->' not in video_transcript or \ ':' not in video_transcript or \ '- ' not in video_transcript: print('WARN: does not look like a video transcript ' + video_transcript) return False try: with open(media_filename + '.vtt', 'w+', encoding='utf-8') as fp_vtt: fp_vtt.write(video_transcript) return True except OSError: print('EX: unable to save video transcript ' + media_filename + '.vtt') return False def attach_media(base_dir: str, http_prefix: str, nickname: str, domain: str, port: int, post_json: {}, image_filename: str, media_type: str, description: str, video_transcript: str, city: str, low_bandwidth: bool, content_license_url: str, creator: str, system_language: str) -> {}: """Attaches media to a json object post The description can be None """ if not _is_media(image_filename): return post_json file_extension = None accepted_types = get_media_extensions() for mtype in accepted_types: if image_filename.endswith('.' + mtype): if mtype == 'jpg': mtype = 'jpeg' if mtype == 'mp3': mtype = 'mpeg' file_extension = mtype if not file_extension: return post_json media_type = media_type + '/' + file_extension print('Attached media type: ' + media_type) if file_extension == 'jpeg': file_extension = 'jpg' if media_type == 'audio/mpeg': file_extension = 'mp3' if media_type == 'audio/speex' or \ media_type == 'audio/x-speex': file_extension = 'spx' domain = get_full_domain(domain, port) mpath = get_media_path() media_path = mpath + '/' + create_password(32) + '.' + file_extension if base_dir: create_media_dirs(base_dir, mpath) media_filename = base_dir + '/' + media_path media_path = \ media_path.replace('media/', 'system/media_attachments/files/', 1) attachment_json = { 'mediaType': media_type, 'name': description, 'type': 'Document', 'url': http_prefix + '://' + domain + '/' + media_path } if content_license_url or creator: attachment_json['@context'] = [ 'https://www.w3.org/ns/activitystreams', {'schema': 'https://schema.org#'} ] if content_license_url: attachment_json['schema:license'] = content_license_url if creator: attachment_json['schema:creator'] = creator if media_type.startswith('image/'): attachment_json['blurhash'] = _get_blur_hash() # find the dimensions of the image and add them as metadata attach_image_width, attach_image_height = \ get_image_dimensions(image_filename) if attach_image_width and attach_image_height: attachment_json['width'] = attach_image_width attachment_json['height'] = attach_image_height # create video transcript post_json['attachment'] = [attachment_json] if video_transcript and 'video' in media_type: if _store_video_transcript(video_transcript, media_filename): video_transcript_json = { 'mediaType': 'text/vtt', 'name': system_language, 'type': 'Document', 'url': http_prefix + '://' + domain + '/' + media_path + '.vtt' } post_json['attachment'].append(video_transcript_json) if base_dir: if media_type.startswith('image/'): if low_bandwidth: convert_image_to_low_bandwidth(image_filename) process_meta_data(base_dir, nickname, domain, image_filename, media_filename, city, content_license_url) else: copyfile(image_filename, media_filename) _update_etag(media_filename) return post_json def archive_media(base_dir: str, archive_directory: str, max_weeks: int) -> None: """Any media older than the given number of weeks gets archived """ if max_weeks == 0: return curr_time = datetime.datetime.utcnow() weeks_since_epoch = int((curr_time - datetime.datetime(1970, 1, 1)).days/7) min_week = weeks_since_epoch - max_weeks if archive_directory: if not os.path.isdir(archive_directory): os.mkdir(archive_directory) if not os.path.isdir(archive_directory + '/media'): os.mkdir(archive_directory + '/media') for _, dirs, _ in os.walk(base_dir + '/media'): for week_dir in dirs: if int(week_dir) < min_week: if archive_directory: move(os.path.join(base_dir + '/media', week_dir), archive_directory + '/media') else: # archive to /dev/null rmtree(os.path.join(base_dir + '/media', week_dir), ignore_errors=False, onerror=None) break def path_is_video(path: str) -> bool: """Is the given path a video file? """ if path.endswith('.ogv') or \ path.endswith('.mp4'): return True return False def path_is_transcript(path: str) -> bool: """Is the given path a video transcript WebVTT file? """ if path.endswith('.vtt'): return True return False def path_is_audio(path: str) -> bool: """Is the given path an audio file? """ if path.endswith('.ogg') or \ path.endswith('.opus') or \ path.endswith('.spx') or \ path.endswith('.flac') or \ path.endswith('.wav') or \ path.endswith('.mp3'): return True return False def get_image_dimensions(image_filename: str) -> (int, int): """Returns the dimensions of an image file """ safe_image_filename = safe_system_string(image_filename) try: result = subprocess.run(['identify', '-format', '"%wx%h"', safe_image_filename], stdout=subprocess.PIPE) except BaseException: print('EX: get_image_dimensions unable to run identify command') return None, None if not result: return None, None dimensions_str = result.stdout.decode('utf-8').replace('"', '') if 'x' not in dimensions_str: return None, None width_str = dimensions_str.split('x')[0] if not width_str.isdigit(): return None, None height_str = dimensions_str.split('x')[1] if not height_str.isdigit(): return None, None return int(width_str), int(height_str)