d/control: Build-depend on flake8 and python3-nose.

[youtubedl] / youtube_dl / downloader / http.py

diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index 3ff26ff7086afbf9d1245a144406f891e9ff393c..3c72ea18b2304befd5221960503ff5b6141304c3 100644 (file)
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -4,13 +4,18 @@ import errno
 import os
 import socket
 import time
 import os
 import socket
 import time

+import random

 import re
 
 from .common import FileDownloader
 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,
 from ..utils import (
     ContentTooShortError,
     encodeFilename,

+    int_or_none,

     sanitize_open,
     sanitized_Request,
     write_xattr,
     sanitize_open,
     sanitized_Request,
     write_xattr,


@@ -38,21 +43,26 @@ class HttpFD(FileDownloader):
         add_headers = info_dict.get('http_headers')
         if add_headers:
             headers.update(add_headers)
         add_headers = info_dict.get('http_headers')
         if add_headers:
             headers.update(add_headers)

-        basic_request = sanitized_Request(url, None, headers)
-        request = sanitized_Request(url, None, headers)

 
         is_test = self.params.get('test', False)
 
         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 (
+            info_dict.get('downloader_options', {}).get('http_chunk_size')
+            or self.params.get('http_chunk_size') or 0)

 
         ctx.open_mode = 'wb'
         ctx.resume_len = 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()
+        ctx.chunk_size = None

 
         if self.params.get('continuedl', True):
             # Establish possible resume length
             if os.path.isfile(encodeFilename(ctx.tmpfilename)):
 
         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)
 
         count = 0
         retries = self.params.get('retries', 0)


@@ -64,11 +74,36 @@ class HttpFD(FileDownloader):
             def __init__(self, source_error):
                 self.source_error = source_error
 
             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():
         def establish_connection():

-            if ctx.resume_len != 0:
-                self.report_resuming_byte(ctx.resume_len)
-                request.add_header('Range', 'bytes=%d-' % ctx.resume_len)
+            ctx.chunk_size = (random.randint(int(chunk_size * 0.95), chunk_size)
+                              if not is_test and chunk_size else chunk_size)
+            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'
                 ctx.open_mode = 'ab'

+            elif ctx.chunk_size > 0:
+                range_start = 0
+            else:
+                range_start = None
+            ctx.is_resume = False
+            range_end = range_start + ctx.chunk_size - 1 if ctx.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
+            request = sanitized_Request(url, None, headers)
+            if has_range:
+                set_range(request, range_start, range_end)

             # Establish connection
             try:
                 ctx.data = self.ydl.urlopen(request)
             # Establish connection
             try:
                 ctx.data = self.ydl.urlopen(request)


@@ -76,38 +111,49 @@ class HttpFD(FileDownloader):
                 # to match the value of requested Range HTTP header. This is due to a webservers
                 # that don't support resuming and serve a whole file with no Content-Range
                 # set in response despite of requested Range (see
                 # to match the value of requested Range HTTP header. This is due to a webservers
                 # 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:
+                # https://github.com/ytdl-org/youtube-dl/issues/6057#issuecomment-126129799)
+                if has_range:

                     content_range = ctx.data.headers.get('Content-Range')
                     if content_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
                         # 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 ctx.chunk_size
+                                    # Chunked download and requested piece or
+                                    # its part is promised to be served
+                                    or 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'
                     # 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:
                 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
                     # Unable to resume (requested range not satisfiable)
                     try:
                         # Open the connection again without the range header

-                        ctx.data = self.ydl.urlopen(basic_request)
+                        ctx.data = self.ydl.urlopen(
+                            sanitized_Request(url, None, headers))

                         content_length = ctx.data.info()['Content-Length']
                     except (compat_urllib_error.HTTPError, ) as err:
                         if err.code < 500 or err.code >= 600:
                             raise
                     else:
                         # Examine the reported length
                         content_length = ctx.data.info()['Content-Length']
                     except (compat_urllib_error.HTTPError, ) as err:
                         if err.code < 500 or err.code >= 600:
                             raise
                     else:
                         # Examine the reported length

-                        if (content_length is not None and
-                                (ctx.resume_len - 100 < int(content_length) < ctx.resume_len + 100)):
+                        if (content_length is not None
+                                and (ctx.resume_len - 100 < int(content_length) < ctx.resume_len + 100)):

                             # The file had already been fully downloaded.
                             # Explanation to the above condition: in issue #175 it was revealed that
                             # YouTube sometimes adds or removes a few bytes from the end of the file,
                             # The file had already been fully downloaded.
                             # Explanation to the above condition: in issue #175 it was revealed that
                             # YouTube sometimes adds or removes a few bytes from the end of the file,


@@ -130,6 +176,9 @@ class HttpFD(FileDownloader):
                             ctx.resume_len = 0
                             ctx.open_mode = 'wb'
                             return
                             ctx.resume_len = 0
                             ctx.open_mode = 'wb'
                             return

+                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:
                 raise RetryDownload(err)
             except socket.error as err:
                 if err.errno != errno.ECONNRESET:


@@ -160,7 +209,7 @@ class HttpFD(FileDownloader):
                     return False
 
             byte_counter = 0 + ctx.resume_len
                     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
             start = time.time()
 
             # measure time over whole while-loop, so slow_down() and best_block_size() work together properly


@@ -168,10 +217,11 @@ class HttpFD(FileDownloader):
             before = start  # start measuring
 
             def retry(e):
             before = start  # start measuring
 
             def retry(e):

-                if ctx.tmpfilename != '-':
+                to_stdout = ctx.tmpfilename == '-'
+                if not to_stdout:

                     ctx.stream.close()
                 ctx.stream = None
                     ctx.stream.close()
                 ctx.stream = None

-                ctx.resume_len = os.path.getsize(encodeFilename(ctx.tmpfilename))
+                ctx.resume_len = byte_counter if to_stdout else os.path.getsize(encodeFilename(ctx.tmpfilename))

                 raise RetryDownload(e)
 
             while True:
                 raise RetryDownload(e)
 
             while True:


@@ -233,25 +283,30 @@ class HttpFD(FileDownloader):
 
                 # Progress message
                 speed = self.calc_speed(start, now, byte_counter - ctx.resume_len)
 
                 # 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 = 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,
 
                 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,
                     '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 is_test and byte_counter == data_len:
                     break
 

+            if not is_test and ctx.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')
             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',
                 'total_bytes': byte_counter,
                 'filename': ctx.filename,
                 'status': 'finished',

-                'elapsed': time.time() - start,
+                'elapsed': time.time() - ctx.start_time,

             })
 
             return True
             })
 
             return True


@@ -290,6 +345,8 @@ class HttpFD(FileDownloader):
                 if count <= retries:
                     self.report_retry(e.source_error, count, retries)
                 continue
                 if count <= retries:
                     self.report_retry(e.source_error, count, retries)
                 continue

+            except NextFragment:
+                continue

             except SucceedDownload:
                 return True
 
             except SucceedDownload:
                 return True