import subprocess import binascii from zope.interface import implements from lbrynet.lbryfile.StreamDescriptor import save_sd_info from lbrynet.cryptstream.client.CryptStreamDownloader import CryptStreamDownloader from lbrynet.core.client.StreamProgressManager import FullStreamProgressManager from lbrynet.interfaces import IStreamDownloaderFactory from lbrynet.lbryfile.client.LBRYFileMetadataHandler import LBRYFileMetadataHandler import os from twisted.internet import defer, threads, reactor from twisted.python.procutils import which class LBRYFileDownloader(CryptStreamDownloader): """Classes which inherit from this class download LBRY files""" def __init__(self, stream_hash, peer_finder, rate_limiter, blob_manager, stream_info_manager, payment_rate_manager, wallet, upload_allowed): CryptStreamDownloader.__init__(self, peer_finder, rate_limiter, blob_manager, payment_rate_manager, wallet, upload_allowed) self.stream_hash = stream_hash self.stream_info_manager = stream_info_manager self.suggested_file_name = None self._calculated_total_bytes = None def set_stream_info(self): if self.key is None: d = self.stream_info_manager.get_stream_info(self.stream_hash) def set_stream_info(stream_info): key, stream_name, suggested_file_name = stream_info self.key = binascii.unhexlify(key) self.stream_name = binascii.unhexlify(stream_name) self.suggested_file_name = binascii.unhexlify(suggested_file_name) d.addCallback(set_stream_info) return d else: return defer.succeed(True) def stop(self, err=None): d = self._close_output() d.addCallback(lambda _: CryptStreamDownloader.stop(self, err=err)) return d def _get_progress_manager(self, download_manager): return FullStreamProgressManager(self._finished_downloading, self.blob_manager, download_manager) def _start(self): d = self._setup_output() d.addCallback(lambda _: CryptStreamDownloader._start(self)) return d def _setup_output(self): pass def _close_output(self): pass def get_total_bytes(self): if self._calculated_total_bytes is None or self._calculated_total_bytes == 0: if self.download_manager is None: return 0 else: self._calculated_total_bytes = self.download_manager.calculate_total_bytes() return self._calculated_total_bytes def get_bytes_left_to_output(self): if self.download_manager is not None: return self.download_manager.calculate_bytes_left_to_output() else: return 0 def get_bytes_left_to_download(self): if self.download_manager is not None: return self.download_manager.calculate_bytes_left_to_download() else: return 0 def _get_metadata_handler(self, download_manager): return LBRYFileMetadataHandler(self.stream_hash, self.stream_info_manager, download_manager) class LBRYFileDownloaderFactory(object): implements(IStreamDownloaderFactory) def __init__(self, peer_finder, rate_limiter, blob_manager, stream_info_manager, wallet): self.peer_finder = peer_finder self.rate_limiter = rate_limiter self.blob_manager = blob_manager self.stream_info_manager = stream_info_manager self.wallet = wallet def can_download(self, sd_validator): return True def make_downloader(self, sd_validator, options, payment_rate_manager, **kwargs): payment_rate_manager.min_blob_data_payment_rate = options[0] upload_allowed = options[1] def create_downloader(stream_hash): downloader = self._make_downloader(stream_hash, payment_rate_manager, sd_validator.raw_info, upload_allowed) d = downloader.set_stream_info() d.addCallback(lambda _: downloader) return d d = save_sd_info(self.stream_info_manager, sd_validator.raw_info) d.addCallback(create_downloader) return d def _make_downloader(self, stream_hash, payment_rate_manager, stream_info, upload_allowed): pass class LBRYFileSaver(LBRYFileDownloader): def __init__(self, stream_hash, peer_finder, rate_limiter, blob_manager, stream_info_manager, payment_rate_manager, wallet, download_directory, upload_allowed, file_name=None): LBRYFileDownloader.__init__(self, stream_hash, peer_finder, rate_limiter, blob_manager, stream_info_manager, payment_rate_manager, wallet, upload_allowed) self.download_directory = download_directory self.file_name = file_name self.file_handle = None def set_stream_info(self): d = LBRYFileDownloader.set_stream_info(self) def set_file_name(): if self.file_name is None: if self.suggested_file_name: self.file_name = os.path.basename(self.suggested_file_name) else: self.file_name = os.path.basename(self.stream_name) d.addCallback(lambda _: set_file_name()) return d def stop(self, err=None): d = LBRYFileDownloader.stop(self, err=err) d.addCallback(lambda _: self._delete_from_info_manager()) return d def _get_progress_manager(self, download_manager): return FullStreamProgressManager(self._finished_downloading, self.blob_manager, download_manager, delete_blob_after_finished=not self.upload_allowed) def _setup_output(self): def open_file(): if self.file_handle is None: file_name = self.file_name if not file_name: file_name = "_" if os.path.exists(os.path.join(self.download_directory, file_name)): ext_num = 1 while os.path.exists(os.path.join(self.download_directory, file_name + "_" + str(ext_num))): ext_num += 1 file_name = file_name + "_" + str(ext_num) self.file_handle = open(os.path.join(self.download_directory, file_name), 'wb') return threads.deferToThread(open_file) def _close_output(self): self.file_handle, file_handle = None, self.file_handle def close_file(): if file_handle is not None: name = file_handle.name file_handle.close() if self.completed is False: os.remove(name) return threads.deferToThread(close_file) def _get_write_func(self): def write_func(data): if self.stopped is False and self.file_handle is not None: self.file_handle.write(data) return write_func def _delete_from_info_manager(self): return self.stream_info_manager.delete_stream(self.stream_hash) class LBRYFileSaverFactory(LBRYFileDownloaderFactory): def __init__(self, peer_finder, rate_limiter, blob_manager, stream_info_manager, wallet, download_directory): LBRYFileDownloaderFactory.__init__(self, peer_finder, rate_limiter, blob_manager, stream_info_manager, wallet) self.download_directory = download_directory def _make_downloader(self, stream_hash, payment_rate_manager, stream_info, upload_allowed): return LBRYFileSaver(stream_hash, self.peer_finder, self.rate_limiter, self.blob_manager, self.stream_info_manager, payment_rate_manager, self.wallet, self.download_directory, upload_allowed) def get_description(self): return "Save" class LBRYFileOpener(LBRYFileDownloader): def __init__(self, stream_hash, peer_finder, rate_limiter, blob_manager, stream_info_manager, payment_rate_manager, wallet, upload_allowed): LBRYFileDownloader.__init__(self, stream_hash, peer_finder, rate_limiter, blob_manager, stream_info_manager, payment_rate_manager, wallet, upload_allowed) self.process = None self.process_log = None def stop(self, err=None): d = LBRYFileDownloader.stop(self, err=err) d.addCallback(lambda _: self._delete_from_info_manager()) return d def _get_progress_manager(self, download_manager): return FullStreamProgressManager(self._finished_downloading, self.blob_manager, download_manager, delete_blob_after_finished=not self.upload_allowed) def _setup_output(self): def start_process(): if os.name == "nt": paths = [r'C:\Program Files\VideoLAN\VLC\vlc.exe', r'C:\Program Files (x86)\VideoLAN\VLC\vlc.exe'] for p in paths: if os.path.exists(p): vlc_path = p break else: raise ValueError("You must install VLC media player to stream files") else: vlc_path = 'vlc' self.process_log = open("vlc.out", 'a') try: self.process = subprocess.Popen([vlc_path, '-'], stdin=subprocess.PIPE, stdout=self.process_log, stderr=self.process_log) except OSError: raise ValueError("VLC media player could not be opened") d = threads.deferToThread(start_process) return d def _close_output(self): if self.process is not None: self.process.stdin.close() self.process = None return defer.succeed(True) def _get_write_func(self): def write_func(data): if self.stopped is False and self.process is not None: try: self.process.stdin.write(data) except IOError: reactor.callLater(0, self.stop) return write_func def _delete_from_info_manager(self): return self.stream_info_manager.delete_stream(self.stream_hash) class LBRYFileOpenerFactory(LBRYFileDownloaderFactory): def can_download(self, sd_validator): if which('vlc'): return True elif os.name == "nt": paths = [r'C:\Program Files\VideoLAN\VLC\vlc.exe', r'C:\Program Files (x86)\VideoLAN\VLC\vlc.exe'] for p in paths: if os.path.exists(p): return True return False def _make_downloader(self, stream_hash, payment_rate_manager, stream_info, upload_allowed): return LBRYFileOpener(stream_hash, self.peer_finder, self.rate_limiter, self.blob_manager, self.stream_info_manager, payment_rate_manager, self.wallet, upload_allowed) def get_description(self): return "Stream"