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synced 2024-07-14 23:00:06 +02:00
More control about connection retry mechanism
- If when retrying a failed connection ^C is hit, the retrying is aborted, - Option --max-connection-attempts to override default of how many connection attempts should be made. Closes #51.
This commit is contained in:
Alexander Graf
parent
e0ed4cf16c
commit
a1920b97a4
@ -142,6 +142,12 @@ How to Download
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User Agent to use for HTTP requests. Per default, Instaloader pretends being
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Chrome/51.
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.. option:: --max-connection-attempts N
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Maximum number of connection attempts until a request is aborted. Defaults
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to ``3``. If a connection fails, it can by manually skipped by hitting
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:kbd:`Control-c`. Set this to ``0`` to retry infinitely.
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Miscellaneous Options
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^^^^^^^^^^^^^^^^^^^^^
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@ -405,7 +405,8 @@ class Instaloader:
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download_geotags: Tristate = Tristate.no_extra_query,
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save_captions: Tristate = Tristate.no_extra_query,
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download_comments: Tristate = Tristate.no_extra_query,
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save_metadata: Tristate = Tristate.never):
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save_metadata: Tristate = Tristate.never,
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max_connection_attempts: int = 3):
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# configuration parameters
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self.user_agent = user_agent if user_agent is not None else default_user_agent()
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@ -421,6 +422,7 @@ class Instaloader:
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self.save_captions = save_captions
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self.download_comments = download_comments
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self.save_metadata = save_metadata
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self.max_connection_attempts = max_connection_attempts
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# error log, filled with error() and printed at the end of Instaloader.main()
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self.error_log = []
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@ -439,7 +441,8 @@ class Instaloader:
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new_loader = Instaloader(self.sleep, self.quiet, self.user_agent,
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self.dirname_pattern, self.filename_pattern,
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self.download_videos, self.download_geotags,
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self.save_captions, self.download_comments)
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self.save_captions, self.download_comments,
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self.save_metadata, self.max_connection_attempts)
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new_loader.previous_queries = self.previous_queries
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yield new_loader
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self.error_log.extend(new_loader.error_log)
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@ -477,7 +480,7 @@ class Instaloader:
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if self.sleep:
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time.sleep(random.uniform(0.5, 3))
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def _get_and_write_raw(self, url: str, filename: str, tries: int = 3) -> None:
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def _get_and_write_raw(self, url: str, filename: str, _attempt = 1) -> None:
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"""Downloads raw data.
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:raises QueryReturnedNotFoundException: When the server responds with a 404.
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@ -496,21 +499,23 @@ class Instaloader:
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raise ConnectionException("HTTP error code {}.".format(resp.status_code))
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except (urllib3.exceptions.HTTPError, requests.exceptions.RequestException, ConnectionException) as err:
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error_string = "URL {}: {}".format(url, err)
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if tries <= 1:
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if _attempt == self.max_connection_attempts:
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raise ConnectionException(error_string)
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self.error(error_string + " [retrying; skip with ^C]", repeat_at_end=False)
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try:
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self._sleep()
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self._get_and_write_raw(url, filename, _attempt + 1)
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except KeyboardInterrupt:
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self.error("[skipped by user]", repeat_at_end=False)
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raise ConnectionException(error_string)
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else:
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self.error(error_string + " [retrying]", repeat_at_end=False)
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self._sleep()
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self._get_and_write_raw(url, filename, tries - 1)
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def get_json(self, url: str, params: Dict[str, Any],
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session: Optional[requests.Session] = None, tries: int = 3) -> Dict[str, Any]:
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session: Optional[requests.Session] = None, _attempt = 1) -> Dict[str, Any]:
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"""JSON request to Instagram.
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:param url: URL, relative to www.instagram.com/
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:param params: GET parameters
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:param session: Session to use, or None to use self.session
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:param tries: Maximum number of attempts until an exception is raised
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:return: Decoded response dictionary
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:raises QueryReturnedNotFoundException: When the server responds with a 404.
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:raises ConnectionException: When query repeatedly failed.
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@ -558,21 +563,25 @@ class Instaloader:
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return resp_json
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except (ConnectionException, json.decoder.JSONDecodeError, requests.exceptions.RequestException) as err:
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error_string = "JSON Query to {}: {}".format(url, err)
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if tries <= 1:
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if _attempt == self.max_connection_attempts:
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raise ConnectionException(error_string)
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self.error(error_string + " [retrying; skip with ^C]", repeat_at_end=False)
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text_for_429 = ("HTTP error code 429 was returned because too many queries occured in the last time. "
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"Please do not use Instagram in your browser or run multiple instances of Instaloader "
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"in parallel.")
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try:
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if isinstance(err, TooManyRequests):
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print(textwrap.fill(text_for_429), file=sys.stderr)
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if is_graphql_query:
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waittime = graphql_query_waittime(query_id=params['query_id'], untracked_queries=True)
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if waittime > 0:
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self._log('The request will be retried in {} seconds.'.format(waittime))
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time.sleep(waittime)
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self._sleep()
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return self.get_json(url, params, sess, _attempt + 1)
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except KeyboardInterrupt:
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self.error("[skipped by user]", repeat_at_end=False)
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raise ConnectionException(error_string)
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self.error(error_string + " [retrying]", repeat_at_end=False)
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if isinstance(err, TooManyRequests):
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text_for_429 = ("HTTP error code 429 was returned because too many queries occured in the last time. "
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"Please do not use Instagram in your browser or run multiple instances of Instaloader "
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"in parallel.")
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print(textwrap.fill(text_for_429), file=sys.stderr)
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if is_graphql_query:
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waittime = graphql_query_waittime(query_id=params['query_id'], untracked_queries=True)
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if waittime > 0:
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self._log('The request will be retried in {} seconds.'.format(waittime))
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time.sleep(waittime)
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self._sleep()
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return self.get_json(url, params, sess, tries - 1)
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def _default_http_header(self, empty_session_only: bool = False) -> Dict[str, str]:
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"""Returns default HTTP header we use for requests."""
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@ -1464,6 +1473,10 @@ def main():
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g_how.add_argument('--user-agent',
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help='User Agent to use for HTTP requests. Defaults to \'{}\'.'.format(default_user_agent()))
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g_how.add_argument('-S', '--no-sleep', action='store_true', help=SUPPRESS)
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g_how.add_argument('--max-connection-attempts', metavar='N', type=int, default=3,
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help='Maximum number of connection attempts until a request is aborted. Defaults to 3. If a '
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'connection fails, it can by manually skipped by hitting CTRL+C. Set this to 0 to retry '
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'infinitely.')
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g_misc = parser.add_argument_group('Miscellaneous Options')
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g_misc.add_argument('-q', '--quiet', action='store_true',
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@ -1505,7 +1518,7 @@ def main():
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dirname_pattern=args.dirname_pattern, filename_pattern=args.filename_pattern,
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download_videos=download_videos, download_geotags=download_geotags,
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save_captions=save_captions, download_comments=download_comments,
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save_metadata=save_metadata)
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save_metadata=save_metadata, max_connection_attempts=args.max_connection_attempts)
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loader.main(args.profile, args.login.lower() if args.login is not None else None, args.password,
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args.sessionfile,
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int(args.count) if args.count is not None else None,
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