diff options
Diffstat (limited to 'youtube_dl/downloader/http.py')
| -rw-r--r-- | youtube_dl/downloader/http.py | 101 |
1 files changed, 79 insertions, 22 deletions
diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py index 3ff26ff70..dc2b37beb 100644 --- a/youtube_dl/downloader/http.py +++ b/youtube_dl/downloader/http.py @@ -7,10 +7,14 @@ import time import re from .common import FileDownloader -from ..compat import compat_urllib_error +from ..compat import ( + compat_str, + compat_urllib_error, +) from ..utils import ( ContentTooShortError, encodeFilename, + int_or_none, sanitize_open, sanitized_Request, write_xattr, @@ -42,17 +46,22 @@ class HttpFD(FileDownloader): request = sanitized_Request(url, None, headers) is_test = self.params.get('test', False) - - if is_test: - request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1)) + chunk_size = self._TEST_FILE_SIZE if is_test else ( + self.params.get('http_chunk_size') or 0) ctx.open_mode = 'wb' ctx.resume_len = 0 + ctx.data_len = None + ctx.block_size = self.params.get('buffersize', 1024) + ctx.start_time = time.time() if self.params.get('continuedl', True): # Establish possible resume length if os.path.isfile(encodeFilename(ctx.tmpfilename)): - ctx.resume_len = os.path.getsize(encodeFilename(ctx.tmpfilename)) + ctx.resume_len = os.path.getsize( + encodeFilename(ctx.tmpfilename)) + + ctx.is_resume = ctx.resume_len > 0 count = 0 retries = self.params.get('retries', 0) @@ -64,11 +73,33 @@ class HttpFD(FileDownloader): def __init__(self, source_error): self.source_error = source_error + class NextFragment(Exception): + pass + + def set_range(req, start, end): + range_header = 'bytes=%d-' % start + if end: + range_header += compat_str(end) + req.add_header('Range', range_header) + def establish_connection(): - if ctx.resume_len != 0: - self.report_resuming_byte(ctx.resume_len) - request.add_header('Range', 'bytes=%d-' % ctx.resume_len) + if ctx.resume_len > 0: + range_start = ctx.resume_len + if ctx.is_resume: + self.report_resuming_byte(ctx.resume_len) ctx.open_mode = 'ab' + elif chunk_size > 0: + range_start = 0 + else: + range_start = None + ctx.is_resume = False + range_end = range_start + chunk_size - 1 if chunk_size else None + if range_end and ctx.data_len is not None and range_end >= ctx.data_len: + range_end = ctx.data_len - 1 + has_range = range_start is not None + ctx.has_range = has_range + if has_range: + set_range(request, range_start, range_end) # Establish connection try: ctx.data = self.ydl.urlopen(request) @@ -77,25 +108,35 @@ class HttpFD(FileDownloader): # that don't support resuming and serve a whole file with no Content-Range # set in response despite of requested Range (see # https://github.com/rg3/youtube-dl/issues/6057#issuecomment-126129799) - if ctx.resume_len > 0: + if has_range: content_range = ctx.data.headers.get('Content-Range') if content_range: - content_range_m = re.search(r'bytes (\d+)-', content_range) + content_range_m = re.search(r'bytes (\d+)-(\d+)?(?:/(\d+))?', content_range) # Content-Range is present and matches requested Range, resume is possible - if content_range_m and ctx.resume_len == int(content_range_m.group(1)): - return + if content_range_m: + if range_start == int(content_range_m.group(1)): + content_range_end = int_or_none(content_range_m.group(2)) + content_len = int_or_none(content_range_m.group(3)) + accept_content_len = ( + # Non-chunked download + not chunk_size or + # Chunked download and requested piece or + # its part is promised to be served + content_range_end == range_end or + content_len < range_end) + if accept_content_len: + ctx.data_len = content_len + return # Content-Range is either not present or invalid. Assuming remote webserver is # trying to send the whole file, resume is not possible, so wiping the local file # and performing entire redownload self.report_unable_to_resume() ctx.resume_len = 0 ctx.open_mode = 'wb' + ctx.data_len = int_or_none(ctx.data.info().get('Content-length', None)) return except (compat_urllib_error.HTTPError, ) as err: - if (err.code < 500 or err.code >= 600) and err.code != 416: - # Unexpected HTTP error - raise - elif err.code == 416: + if err.code == 416: # Unable to resume (requested range not satisfiable) try: # Open the connection again without the range header @@ -130,6 +171,15 @@ class HttpFD(FileDownloader): ctx.resume_len = 0 ctx.open_mode = 'wb' return + elif err.code == 302: + if not chunk_size: + raise + # HTTP Error 302: The HTTP server returned a redirect error that would lead to an infinite loop. + # may happen during chunk downloading. This is usually fixed + # with a retry. + elif err.code < 500 or err.code >= 600: + # Unexpected HTTP error + raise raise RetryDownload(err) except socket.error as err: if err.errno != errno.ECONNRESET: @@ -160,7 +210,7 @@ class HttpFD(FileDownloader): return False byte_counter = 0 + ctx.resume_len - block_size = self.params.get('buffersize', 1024) + block_size = ctx.block_size start = time.time() # measure time over whole while-loop, so slow_down() and best_block_size() work together properly @@ -233,25 +283,30 @@ class HttpFD(FileDownloader): # Progress message speed = self.calc_speed(start, now, byte_counter - ctx.resume_len) - if data_len is None: + if ctx.data_len is None: eta = None else: - eta = self.calc_eta(start, time.time(), data_len - ctx.resume_len, byte_counter - ctx.resume_len) + eta = self.calc_eta(start, time.time(), ctx.data_len - ctx.resume_len, byte_counter - ctx.resume_len) self._hook_progress({ 'status': 'downloading', 'downloaded_bytes': byte_counter, - 'total_bytes': data_len, + 'total_bytes': ctx.data_len, 'tmpfilename': ctx.tmpfilename, 'filename': ctx.filename, 'eta': eta, 'speed': speed, - 'elapsed': now - start, + 'elapsed': now - ctx.start_time, }) if is_test and byte_counter == data_len: break + if not is_test and chunk_size and ctx.data_len is not None and byte_counter < ctx.data_len: + ctx.resume_len = byte_counter + # ctx.block_size = block_size + raise NextFragment() + if ctx.stream is None: self.to_stderr('\n') self.report_error('Did not get any data blocks') @@ -276,7 +331,7 @@ class HttpFD(FileDownloader): 'total_bytes': byte_counter, 'filename': ctx.filename, 'status': 'finished', - 'elapsed': time.time() - start, + 'elapsed': time.time() - ctx.start_time, }) return True @@ -290,6 +345,8 @@ class HttpFD(FileDownloader): if count <= retries: self.report_retry(e.source_error, count, retries) continue + except NextFragment: + continue except SucceedDownload: return True |