diff options
Diffstat (limited to 'youtube_dl/downloader/f4m.py')
| -rw-r--r-- | youtube_dl/downloader/f4m.py | 202 |
1 files changed, 111 insertions, 91 deletions
diff --git a/youtube_dl/downloader/f4m.py b/youtube_dl/downloader/f4m.py index 0e7a1c200..6170cc155 100644 --- a/youtube_dl/downloader/f4m.py +++ b/youtube_dl/downloader/f4m.py @@ -1,23 +1,23 @@ -from __future__ import unicode_literals +from __future__ import division, unicode_literals import base64 import io import itertools import os import time -import xml.etree.ElementTree as etree -from .common import FileDownloader -from .http import HttpFD +from .fragment import FragmentFD from ..compat import ( + compat_etree_fromstring, compat_urlparse, + compat_urllib_error, + compat_urllib_parse_urlparse, ) from ..utils import ( - struct_pack, - struct_unpack, - format_bytes, encodeFilename, sanitize_open, + struct_pack, + struct_unpack, xpath_text, ) @@ -122,7 +122,8 @@ class FlvReader(io.BytesIO): self.read_unsigned_int() # BootstrapinfoVersion # Profile,Live,Update,Reserved - self.read(1) + flags = self.read_unsigned_char() + live = flags & 0x20 != 0 # time scale self.read_unsigned_int() # CurrentMediaTime @@ -161,6 +162,7 @@ class FlvReader(io.BytesIO): return { 'segments': segments, 'fragments': fragments, + 'live': live, } def read_bootstrap_info(self): @@ -183,6 +185,10 @@ def build_fragments_list(boot_info): for segment, fragments_count in segment_run_table['segment_run']: for _ in range(fragments_count): res.append((segment, next(fragments_counter))) + + if boot_info['live']: + res = res[-2:] + return res @@ -220,16 +226,13 @@ def _add_ns(prop): return '{http://ns.adobe.com/f4m/1.0}%s' % prop -class HttpQuietDownloader(HttpFD): - def to_screen(self, *args, **kargs): - pass - - -class F4mFD(FileDownloader): +class F4mFD(FragmentFD): """ A downloader for f4m manifests or AdobeHDS. """ + FD_NAME = 'f4m' + def _get_unencrypted_media(self, doc): media = doc.findall(_add_ns('media')) if not media: @@ -247,24 +250,47 @@ class F4mFD(FileDownloader): self.report_error('Unsupported DRM') return media + def _get_bootstrap_from_url(self, bootstrap_url): + bootstrap = self.ydl.urlopen(bootstrap_url).read() + return read_bootstrap_info(bootstrap) + + def _update_live_fragments(self, bootstrap_url, latest_fragment): + fragments_list = [] + retries = 30 + while (not fragments_list) and (retries > 0): + boot_info = self._get_bootstrap_from_url(bootstrap_url) + fragments_list = build_fragments_list(boot_info) + fragments_list = [f for f in fragments_list if f[1] > latest_fragment] + if not fragments_list: + # Retry after a while + time.sleep(5.0) + retries -= 1 + + if not fragments_list: + self.report_error('Failed to update fragments') + + return fragments_list + + def _parse_bootstrap_node(self, node, base_url): + if node.text is None: + bootstrap_url = compat_urlparse.urljoin( + base_url, node.attrib['url']) + boot_info = self._get_bootstrap_from_url(bootstrap_url) + else: + bootstrap_url = None + bootstrap = base64.b64decode(node.text.encode('ascii')) + boot_info = read_bootstrap_info(bootstrap) + return (boot_info, bootstrap_url) + def real_download(self, filename, info_dict): man_url = info_dict['url'] requested_bitrate = info_dict.get('tbr') - self.to_screen('[download] Downloading f4m manifest') - manifest = self.ydl.urlopen(man_url).read() - self.report_destination(filename) - http_dl = HttpQuietDownloader( - self.ydl, - { - 'continuedl': True, - 'quiet': True, - 'noprogress': True, - 'ratelimit': self.params.get('ratelimit', None), - 'test': self.params.get('test', False), - } - ) - - doc = etree.fromstring(manifest) + self.to_screen('[%s] Downloading f4m manifest' % self.FD_NAME) + urlh = self.ydl.urlopen(man_url) + man_url = urlh.geturl() + manifest = urlh.read() + + doc = compat_etree_fromstring(manifest) formats = [(int(f.attrib.get('bitrate', -1)), f) for f in self._get_unencrypted_media(doc)] if requested_bitrate is None: @@ -277,18 +303,13 @@ class F4mFD(FileDownloader): base_url = compat_urlparse.urljoin(man_url, media.attrib['url']) bootstrap_node = doc.find(_add_ns('bootstrapInfo')) - if bootstrap_node.text is None: - bootstrap_url = compat_urlparse.urljoin( - base_url, bootstrap_node.attrib['url']) - bootstrap = self.ydl.urlopen(bootstrap_url).read() - else: - bootstrap = base64.b64decode(bootstrap_node.text) + boot_info, bootstrap_url = self._parse_bootstrap_node(bootstrap_node, base_url) + live = boot_info['live'] metadata_node = media.find(_add_ns('metadata')) if metadata_node is not None: - metadata = base64.b64decode(metadata_node.text) + metadata = base64.b64decode(metadata_node.text.encode('ascii')) else: metadata = None - boot_info = read_bootstrap_info(bootstrap) fragments_list = build_fragments_list(boot_info) if self.params.get('test', False): @@ -298,74 +319,73 @@ class F4mFD(FileDownloader): # For some akamai manifests we'll need to add a query to the fragment url akamai_pv = xpath_text(doc, _add_ns('pv-2.0')) - tmpfilename = self.temp_name(filename) - (dest_stream, tmpfilename) = sanitize_open(tmpfilename, 'wb') + ctx = { + 'filename': filename, + 'total_frags': total_frags, + } + + self._prepare_frag_download(ctx) + + dest_stream = ctx['dest_stream'] + write_flv_header(dest_stream) - write_metadata_tag(dest_stream, metadata) + if not live: + write_metadata_tag(dest_stream, metadata) - # This dict stores the download progress, it's updated by the progress - # hook - state = { - 'downloaded_bytes': 0, - 'frag_counter': 0, - } - start = time.time() - - def frag_progress_hook(status): - frag_total_bytes = status.get('total_bytes', 0) - estimated_size = (state['downloaded_bytes'] + - (total_frags - state['frag_counter']) * frag_total_bytes) - if status['status'] == 'finished': - state['downloaded_bytes'] += frag_total_bytes - state['frag_counter'] += 1 - progress = self.calc_percent(state['frag_counter'], total_frags) - byte_counter = state['downloaded_bytes'] - else: - frag_downloaded_bytes = status['downloaded_bytes'] - byte_counter = state['downloaded_bytes'] + frag_downloaded_bytes - frag_progress = self.calc_percent(frag_downloaded_bytes, - frag_total_bytes) - progress = self.calc_percent(state['frag_counter'], total_frags) - progress += frag_progress / float(total_frags) - - eta = self.calc_eta(start, time.time(), estimated_size, byte_counter) - self.report_progress(progress, format_bytes(estimated_size), - status.get('speed'), eta) - http_dl.add_progress_hook(frag_progress_hook) + base_url_parsed = compat_urllib_parse_urlparse(base_url) + + self._start_frag_download(ctx) frags_filenames = [] - for (seg_i, frag_i) in fragments_list: + while fragments_list: + seg_i, frag_i = fragments_list.pop(0) name = 'Seg%d-Frag%d' % (seg_i, frag_i) - url = base_url + name + query = [] + if base_url_parsed.query: + query.append(base_url_parsed.query) if akamai_pv: - url += '?' + akamai_pv.strip(';') - frag_filename = '%s-%s' % (tmpfilename, name) - success = http_dl.download(frag_filename, {'url': url}) - if not success: - return False - with open(frag_filename, 'rb') as down: + query.append(akamai_pv.strip(';')) + if info_dict.get('extra_param_to_segment_url'): + query.append(info_dict['extra_param_to_segment_url']) + url_parsed = base_url_parsed._replace(path=base_url_parsed.path + name, query='&'.join(query)) + frag_filename = '%s-%s' % (ctx['tmpfilename'], name) + try: + success = ctx['dl'].download(frag_filename, {'url': url_parsed.geturl()}) + if not success: + return False + (down, frag_sanitized) = sanitize_open(frag_filename, 'rb') down_data = down.read() + down.close() reader = FlvReader(down_data) while True: _, box_type, box_data = reader.read_box_info() if box_type == b'mdat': dest_stream.write(box_data) break - frags_filenames.append(frag_filename) + if live: + os.remove(encodeFilename(frag_sanitized)) + else: + frags_filenames.append(frag_sanitized) + except (compat_urllib_error.HTTPError, ) as err: + if live and (err.code == 404 or err.code == 410): + # We didn't keep up with the live window. Continue + # with the next available fragment. + msg = 'Fragment %d unavailable' % frag_i + self.report_warning(msg) + fragments_list = [] + else: + raise + + if not fragments_list and live and bootstrap_url: + fragments_list = self._update_live_fragments(bootstrap_url, frag_i) + total_frags += len(fragments_list) + if fragments_list and (fragments_list[0][1] > frag_i + 1): + msg = 'Missed %d fragments' % (fragments_list[0][1] - (frag_i + 1)) + self.report_warning(msg) + + self._finish_frag_download(ctx) - dest_stream.close() - self.report_finish(format_bytes(state['downloaded_bytes']), time.time() - start) - - self.try_rename(tmpfilename, filename) for frag_file in frags_filenames: - os.remove(frag_file) - - fsize = os.path.getsize(encodeFilename(filename)) - self._hook_progress({ - 'downloaded_bytes': fsize, - 'total_bytes': fsize, - 'filename': filename, - 'status': 'finished', - }) + os.remove(encodeFilename(frag_file)) return True |