Release of version 4.2.4

Freeze pylint version to 2.3.1.

.travis.yml

@@ -5,10 +5,10 @@ python:
  - "3.6"
  - "3.6-dev"
 install:
- - pip install pylint requests
+ - pip install pylint~=2.3.1 requests
  - pip install -r docs/requirements.txt
 script:
- - python3 -m pylint -r n -d bad-whitespace,missing-docstring,too-many-arguments,locally-disabled,line-too-long,too-many-public-methods,too-many-lines,too-many-instance-attributes,too-many-locals,too-many-branches,too-many-statements,inconsistent-return-statements,invalid-name,wildcard-import,unused-wildcard-import,no-else-return,cyclic-import,unnecessary-pass instaloader
+ - python3 -m pylint -r n -d bad-whitespace,missing-docstring,too-many-arguments,locally-disabled,line-too-long,no-else-raise,too-many-public-methods,too-many-lines,too-many-instance-attributes,too-many-locals,too-many-branches,too-many-statements,inconsistent-return-statements,invalid-name,wildcard-import,unused-wildcard-import,no-else-return,cyclic-import,unnecessary-pass instaloader
  - make -C docs html SPHINXOPTS="-W -n"
 deploy:
   - provider: pypi

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2016-2018 Alexander Graf and André Koch-Kramer.
+Copyright (c) 2016-2019 Alexander Graf and André Koch-Kramer.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

docs/_templates/layout.html

@@ -51,6 +51,9 @@
         <li class="nav-item">
           <a target="_blank" class="nav-link" href="https://github.com/instaloader/instaloader">GitHub</a>
         </li>
+        <li class="nav-item d-sm-none d-lg-block">
+          <a target="_blank" class="nav-link" href="https://saythanks.io/to/aandergr">Say Thanks!</a>
+        </li>
       </ul>
       <form class="form-inline" action="search.html" method="get">
         <div class="input-group my-2 my-sm-0 ml-2">

docs/as-module.rst

@@ -123,6 +123,9 @@ Additionally, the following trivial structures are defined:
 .. autoclass:: PostComment
    :no-show-inheritance:
 
+.. autoclass:: PostCommentAnswer
+   :no-show-inheritance:
+
 .. autoclass:: PostLocation
    :no-show-inheritance:
 
@@ -198,6 +201,8 @@ Exceptions
 
 .. autoexception:: BadCredentialsException
 
+.. autoexception:: PostChangedException
+
 .. autoexception:: TooManyRequestsException
 
 ``InstaloaderContext`` (Low-level functions)

docs/conf.py

@@ -86,7 +86,7 @@ author = 'Alexander Graf and Andre Koch-Kramer'
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:

instaloader/__init__.py

@@ -1,7 +1,7 @@
 """Download pictures (or videos) along with their captions and other metadata from Instagram."""
 
 
-__version__ = '4.2.1'
+__version__ = '4.2.4'
 
 
 try:
@@ -15,5 +15,5 @@ else:
 from .exceptions import *
 from .instaloader import Instaloader
 from .instaloadercontext import InstaloaderContext
-from .structures import (Highlight, Post, PostSidecarNode, PostComment, PostLocation, Profile, Story, StoryItem,
+from .structures import (Highlight, Post, PostSidecarNode, PostComment, PostCommentAnswer, PostLocation, Profile, Story, StoryItem,
                          load_structure_from_file, save_structure_to_file)

instaloader/__main__.py

@@ -331,7 +331,6 @@ def main():
     g_how.add_argument('--user-agent',
                        help='User Agent to use for HTTP requests. Defaults to \'{}\'.'.format(default_user_agent()))
     g_how.add_argument('-S', '--no-sleep', action='store_true', help=SUPPRESS)
-    g_how.add_argument('--graphql-rate-limit', type=int, help=SUPPRESS)
     g_how.add_argument('--max-connection-attempts', metavar='N', type=int, default=3,
                        help='Maximum number of connection attempts until a request is aborted. Defaults to 3. If a '
                             'connection fails, it can be manually skipped by hitting CTRL+C. Set this to 0 to retry '
@@ -393,7 +392,6 @@ def main():
                              compress_json=not args.no_compress_json,
                              post_metadata_txt_pattern=post_metadata_txt_pattern,
                              storyitem_metadata_txt_pattern=storyitem_metadata_txt_pattern,
-                             graphql_rate_limit=args.graphql_rate_limit,
                              max_connection_attempts=args.max_connection_attempts,
                              commit_mode=args.commit_mode)
         _main(loader,

instaloader/exceptions.py

@@ -22,6 +22,10 @@ class ProfileNotExistsException(InstaloaderException):
 
 
 class ProfileHasNoPicsException(InstaloaderException):
+    """
+    .. deprecated:: 4.2.2
+       Not raised anymore.
+    """
     pass
 
 
@@ -53,5 +57,10 @@ class ConnectionException(InstaloaderException):
     pass
 
 
+class PostChangedException(InstaloaderException):
+    """.. versionadded:: 4.2.2"""
+    pass
+
+
 class TooManyRequestsException(ConnectionException):
     pass

instaloader/instaloader.py

@@ -15,6 +15,9 @@ from hashlib import md5
 from io import BytesIO
 from typing import Any, Callable, Iterator, List, Optional, Set, Union
 
+import requests
+import urllib3
+
 from .exceptions import *
 from .instaloadercontext import InstaloaderContext
 from .structures import Highlight, JsonExportable, Post, PostLocation, Profile, Story, StoryItem, save_structure_to_file, load_structure_from_file
@@ -47,6 +50,37 @@ def _requires_login(func: Callable) -> Callable:
     return call
 
 
+def _retry_on_connection_error(func: Callable) -> Callable:
+    """Decorator to retry the function max_connection_attemps number of times.
+
+    Herewith-decorated functions need an ``_attempt`` keyword argument.
+
+    This is to decorate functions that do network requests that may fail. Note that
+    :meth:`.get_json`, :meth:`.get_iphone_json`, :meth:`.graphql_query` and :meth:`.graphql_node_list` already have
+    their own logic for retrying, hence functions that only use these for network access must not be decorated with this
+    decorator."""
+    @wraps(func)
+    def call(instaloader, *args, **kwargs):
+        try:
+            return func(instaloader, *args, **kwargs)
+        except (urllib3.exceptions.HTTPError, requests.exceptions.RequestException, ConnectionException) as err:
+            error_string = "{}({}): {}".format(func.__name__, ', '.join([repr(arg) for arg in args]), err)
+            if (kwargs.get('_attempt') or 1) == instaloader.context.max_connection_attempts:
+                raise ConnectionException(error_string) from None
+            instaloader.context.error(error_string + " [retrying; skip with ^C]", repeat_at_end=False)
+            try:
+                if kwargs.get('_attempt'):
+                    kwargs['_attempt'] += 1
+                else:
+                    kwargs['_attempt'] = 2
+                instaloader.context.do_sleep()
+                return call(instaloader, *args, **kwargs)
+            except KeyboardInterrupt:
+                instaloader.context.error("[skipped by user]", repeat_at_end=False)
+                raise ConnectionException(error_string) from None
+    return call
+
+
 class _ArbitraryItemFormatter(string.Formatter):
     def __init__(self, item: Any):
         self._item = item
@@ -118,11 +152,10 @@ class Instaloader:
                  compress_json: bool = True,
                  post_metadata_txt_pattern: str = None,
                  storyitem_metadata_txt_pattern: str = None,
-                 graphql_rate_limit: Optional[int] = None,
                  max_connection_attempts: int = 3,
                  commit_mode: bool = False):
 
-        self.context = InstaloaderContext(sleep, quiet, user_agent, graphql_rate_limit, max_connection_attempts)
+        self.context = InstaloaderContext(sleep, quiet, user_agent, max_connection_attempts)
 
         # configuration parameters
         self.dirname_pattern = dirname_pattern or "{target}"
@@ -156,13 +189,10 @@ class Instaloader:
                                  save_metadata=self.save_metadata, compress_json=self.compress_json,
                                  post_metadata_txt_pattern=self.post_metadata_txt_pattern,
                                  storyitem_metadata_txt_pattern=self.storyitem_metadata_txt_pattern,
-                                 graphql_rate_limit=self.context.graphql_count_per_slidingwindow,
                                  max_connection_attempts=self.context.max_connection_attempts)
-        new_loader.context.query_timestamps = self.context.query_timestamps
         yield new_loader
         self.context.error_log.extend(new_loader.context.error_log)
         new_loader.context.error_log = []  # avoid double-printing of errors
-        self.context.query_timestamps = new_loader.context.query_timestamps
         new_loader.close()
 
     def close(self):
@@ -175,7 +205,9 @@ class Instaloader:
     def __exit__(self, *args):
         self.close()
 
-    def download_pic(self, filename: str, url: str, mtime: datetime, filename_suffix: Optional[str] = None) -> bool:
+    @_retry_on_connection_error
+    def download_pic(self, filename: str, url: str, mtime: datetime,
+                     filename_suffix: Optional[str] = None, _attempt: int = 1) -> bool:
         """Downloads and saves picture with given url under given directory with given timestamp.
         Returns true, if file was actually downloaded, i.e. updated."""
         urlmatch = re.search('\\.[a-z0-9]*\\?', url)
@@ -208,11 +240,33 @@ class Instaloader:
             self.context.log('json', end=' ', flush=True)
 
     def update_comments(self, filename: str, post: Post) -> None:
-        def _postcomment_asdict(comment):
+        def _postcommentanswer_asdict(comment):
             return {'id': comment.id,
                     'created_at': int(comment.created_at_utc.replace(tzinfo=timezone.utc).timestamp()),
                     'text': comment.text,
                     'owner': comment.owner._asdict()}
+
+        def _postcomment_asdict(comment):
+            return {**_postcommentanswer_asdict(comment),
+                    'answers': sorted([_postcommentanswer_asdict(answer) for answer in comment.answers],
+                                      key=lambda t: int(t['id']),
+                                      reverse=True)}
+
+        def get_unique_comments(comments, combine_answers=False):
+            if not comments:
+                return list()
+            comments_list = sorted(sorted(list(comments), key=lambda t: int(t['id'])),
+                                   key=lambda t: int(t['created_at']), reverse=True)
+            unique_comments_list = [comments_list[0]]
+            for x, y in zip(comments_list[:-1], comments_list[1:]):
+                if x['id'] != y['id']:
+                    unique_comments_list.append(y)
+                elif combine_answers:
+                    combined_answers = unique_comments_list[-1].get('answers') or list()
+                    if 'answers' in y:
+                        combined_answers.extend(y['answers'])
+                    unique_comments_list[-1]['answers'] = get_unique_comments(combined_answers)
+            return unique_comments_list
         filename += '_comments.json'
         try:
             with open(filename) as fp:
@@ -221,18 +275,10 @@ class Instaloader:
             comments = list()
         comments.extend(_postcomment_asdict(comment) for comment in post.get_comments())
         if comments:
-            comments_list = sorted(sorted(list(comments), key=lambda t: int(t['id'])),
-                                   key=lambda t: int(t['created_at']), reverse=True)
-            unique_comments_list = [comments_list[0]]
-            #for comment in comments_list:
-            #    if unique_comments_list[-1]['id'] != comment['id']:
-            #        unique_comments_list.append(comment)
-            #file.write(json.dumps(unique_comments_list, indent=4))
-            for x, y in zip(comments_list[:-1], comments_list[1:]):
-                if x['id'] != y['id']:
-                    unique_comments_list.append(y)
+            comments = get_unique_comments(comments, combine_answers=True)
+            answer_ids = set(int(answer['id']) for comment in comments for answer in comment.get('answers'))
             with open(filename, 'w') as file:
-                file.write(json.dumps(unique_comments_list, indent=4))
+                file.write(json.dumps(list(filter(lambda t: int(t['id']) not in answer_ids, comments)), indent=4))
             self.context.log('comments', end=' ', flush=True)
 
     def save_caption(self, filename: str, mtime: datetime, caption: str) -> None:
@@ -285,7 +331,8 @@ class Instaloader:
         os.utime(filename, (datetime.now().timestamp(), mtime.timestamp()))
         self.context.log('geo', end=' ', flush=True)
 
-    def download_profilepic(self, profile: Profile) -> None:
+    @_retry_on_connection_error
+    def download_profilepic(self, profile: Profile, _attempt: int = 1) -> None:
         """Downloads and saves profile pic."""
 
         def _epoch_to_string(epoch: datetime) -> str:
@@ -898,6 +945,11 @@ class Instaloader:
             with error_handler(profile.username):
                 profile_name = profile.username
 
+                # Download profile picture
+                if profile_pic:
+                    with self.context.error_catcher('Download profile picture of {}'.format(profile_name)):
+                        self.download_profilepic(profile)
+
                 # Save metadata as JSON if desired.
                 if self.save_metadata:
                     json_filename = '{0}/{1}_{2}'.format(self.dirname_pattern.format(profile=profile_name,
@@ -905,11 +957,6 @@ class Instaloader:
                                                          profile_name, profile.userid)
                     self.save_metadata_json(json_filename, profile)
 
-                # Download profile picture
-                if profile_pic:
-                    with self.context.error_catcher('Download profile picture of {}'.format(profile_name)):
-                        self.download_profilepic(profile)
-
                 # Catch some errors
                 if profile.is_private and (tagged or highlights or posts):
                     if not self.context.is_logged_in:
@@ -939,8 +986,22 @@ class Instaloader:
                             self.context.log('<skipped>')
                             continue
                         with self.context.error_catcher("Download {} of {}".format(post, profile_name)):
-                            downloaded = self.download_post(post, target=profile_name)
-                            if fast_update and not downloaded:
+                            # The PostChangedException gets raised if the Post's id/shortcode changed while obtaining
+                            # additional metadata. This is most likely the case if a HTTP redirect takes place while
+                            # resolving the shortcode URL.
+                            # The `post_changed` variable keeps the fast-update functionality alive: A Post which is
+                            # obained after a redirect has probably already been downloaded as a previous Post of the
+                            # same Profile.
+                            # Observed in issue #225: https://github.com/instaloader/instaloader/issues/225
+                            post_changed = False
+                            while True:
+                                try:
+                                    downloaded = self.download_post(post, target=profile_name)
+                                    break
+                                except PostChangedException:
+                                    post_changed = True
+                                    continue
+                            if fast_update and not downloaded and not post_changed:
                                 break
 
         if stories and profiles:

instaloader/instaloadercontext.py

@@ -14,7 +14,6 @@ from typing import Any, Callable, Dict, Iterator, Optional, Union
 
 import requests
 import requests.utils
-import urllib3
 
 from .exceptions import *
 
@@ -48,7 +47,7 @@ class InstaloaderContext:
     """
 
     def __init__(self, sleep: bool = True, quiet: bool = False, user_agent: Optional[str] = None,
-                 graphql_count_per_slidingwindow: Optional[int] = None, max_connection_attempts: int = 3):
+                 max_connection_attempts: int = 3):
 
         self.user_agent = user_agent if user_agent is not None else default_user_agent()
         self._session = self.get_anonymous_session()
@@ -57,7 +56,6 @@ class InstaloaderContext:
         self.quiet = quiet
         self.max_connection_attempts = max_connection_attempts
         self._graphql_page_length = 50
-        self.graphql_count_per_slidingwindow = graphql_count_per_slidingwindow or 200
         self._root_rhx_gis = None
         self.two_factor_auth_pending = None
 
@@ -65,7 +63,8 @@ class InstaloaderContext:
         self.error_log = []
 
         # For the adaption of sleep intervals (rate control)
-        self.query_timestamps = list()
+        self._graphql_query_timestamps = dict()
+        self._graphql_earliest_next_request_time = 0
 
         # Can be set to True for testing, disables supression of InstaloaderContext._error_catcher
         self.raise_all_errors = False
@@ -195,7 +194,7 @@ class InstaloaderContext:
         csrf_token = session.cookies.get_dict()['csrftoken']
         session.headers.update({'X-CSRFToken': csrf_token})
         # Not using self.get_json() here, because we need to access csrftoken cookie
-        self._sleep()
+        self.do_sleep()
         login = session.post('https://www.instagram.com/accounts/login/ajax/',
                              data={'password': passwd, 'username': user}, allow_redirects=True)
         try:
@@ -261,11 +260,77 @@ class InstaloaderContext:
         self.username = user
         self.two_factor_auth_pending = None
 
-    def _sleep(self):
+    def do_sleep(self):
         """Sleep a short time if self.sleep is set. Called before each request to instagram.com."""
         if self.sleep:
             time.sleep(min(random.expovariate(0.7), 5.0))
 
+    def _dump_query_timestamps(self, current_time: float):
+        """Output the number of GraphQL queries grouped by their query_hash within the last time."""
+        windows = [10, 11, 15, 20, 30, 60]
+        print("GraphQL requests:", file=sys.stderr)
+        for query_hash, times in self._graphql_query_timestamps.items():
+            print("  {}".format(query_hash), file=sys.stderr)
+            for window in windows:
+                reqs_in_sliding_window = sum(t > current_time - window * 60 for t in times)
+                print("    last {} minutes: {} requests".format(window, reqs_in_sliding_window), file=sys.stderr)
+
+    def _graphql_request_count_per_sliding_window(self, query_hash: str) -> int:
+        """Return how many GraphQL requests can be done within the sliding window."""
+        if self.is_logged_in:
+            max_reqs = {'1cb6ec562846122743b61e492c85999f': 20, '33ba35852cb50da46f5b5e889df7d159': 20}
+        else:
+            max_reqs = {'1cb6ec562846122743b61e492c85999f': 200, '33ba35852cb50da46f5b5e889df7d159': 200}
+        return max_reqs.get(query_hash) or min(max_reqs.values())
+
+    def _graphql_query_waittime(self, query_hash: str, current_time: float, untracked_queries: bool = False) -> int:
+        """Calculate time needed to wait before GraphQL query can be executed."""
+        sliding_window = 660
+        if query_hash not in self._graphql_query_timestamps:
+            self._graphql_query_timestamps[query_hash] = []
+        self._graphql_query_timestamps[query_hash] = list(filter(lambda t: t > current_time - 60 * 60,
+                                                                 self._graphql_query_timestamps[query_hash]))
+        reqs_in_sliding_window = list(filter(lambda t: t > current_time - sliding_window,
+                                             self._graphql_query_timestamps[query_hash]))
+        count_per_sliding_window = self._graphql_request_count_per_sliding_window(query_hash)
+        if len(reqs_in_sliding_window) < count_per_sliding_window and not untracked_queries:
+            return max(0, self._graphql_earliest_next_request_time - current_time)
+        next_request_time = min(reqs_in_sliding_window) + sliding_window + 6
+        if untracked_queries:
+            self._graphql_earliest_next_request_time = next_request_time
+        return round(max(next_request_time, self._graphql_earliest_next_request_time) - current_time)
+
+    def _ratecontrol_graphql_query(self, query_hash: str, untracked_queries: bool = False):
+        """Called before a GraphQL query is made in order to stay within Instagram's rate limits.
+
+        :param query_hash: The query_hash parameter of the query.
+        :param untracked_queries: True, if 429 has been returned to apply 429 logic.
+        """
+        if not untracked_queries:
+            waittime = self._graphql_query_waittime(query_hash, time.monotonic(), untracked_queries)
+            assert waittime >= 0
+            if waittime > 10:
+                self.log('\nToo many queries in the last time. Need to wait {} seconds, until {:%H:%M}.'
+                         .format(waittime, datetime.now() + timedelta(seconds=waittime)))
+            time.sleep(waittime)
+            if query_hash not in self._graphql_query_timestamps:
+                self._graphql_query_timestamps[query_hash] = [time.monotonic()]
+            else:
+                self._graphql_query_timestamps[query_hash].append(time.monotonic())
+        else:
+            text_for_429 = ("HTTP error code 429 was returned because too many queries occured in the last time. "
+                            "Please do not use Instagram in your browser or run multiple instances of Instaloader "
+                            "in parallel.")
+            print(textwrap.fill(text_for_429), file=sys.stderr)
+            current_time = time.monotonic()
+            waittime = self._graphql_query_waittime(query_hash, current_time, untracked_queries)
+            assert waittime >= 0
+            if waittime > 10:
+                self.log('The request will be retried in {} seconds, at {:%H:%M}.'
+                         .format(waittime, datetime.now() + timedelta(seconds=waittime)))
+            self._dump_query_timestamps(current_time)
+            time.sleep(waittime)
+
     def get_json(self, path: str, params: Dict[str, Any], host: str = 'www.instagram.com',
                  session: Optional[requests.Session] = None, _attempt=1) -> Dict[str, Any]:
         """JSON request to Instagram.
@@ -279,32 +344,12 @@ class InstaloaderContext:
         :raises QueryReturnedNotFoundException: When the server responds with a 404.
         :raises ConnectionException: When query repeatedly failed.
         """
-        def graphql_query_waittime(untracked_queries: bool = False) -> int:
-            sliding_window = 660
-            if not self.query_timestamps:
-                return sliding_window if untracked_queries else 0
-            current_time = time.monotonic()
-            self.query_timestamps = list(filter(lambda t: t > current_time - sliding_window, self.query_timestamps))
-            if len(self.query_timestamps) < self.graphql_count_per_slidingwindow and not untracked_queries:
-                return 0
-            return round(min(self.query_timestamps) + sliding_window - current_time) + 6
         is_graphql_query = 'query_hash' in params and 'graphql/query' in path
-        # some queries are not rate limited if invoked anonymously:
-        query_not_limited = is_graphql_query and not self.is_logged_in \
-                            and params['query_hash'] in ['9ca88e465c3f866a76f7adee3871bdd8']
-        if is_graphql_query and not query_not_limited:
-            waittime = graphql_query_waittime()
-            if waittime > 0:
-                self.log('\nToo many queries in the last time. Need to wait {} seconds, until {:%H:%M}.'
-                         .format(waittime, datetime.now() + timedelta(seconds=waittime)))
-                time.sleep(waittime)
-            if self.query_timestamps is not None:
-                self.query_timestamps.append(time.monotonic())
-            else:
-                self.query_timestamps = [time.monotonic()]
         sess = session if session else self._session
         try:
-            self._sleep()
+            self.do_sleep()
+            if is_graphql_query:
+                self._ratecontrol_graphql_query(params['query_hash'])
             resp = sess.get('https://{0}/{1}'.format(host, path), params=params, allow_redirects=False)
             while resp.is_redirect:
                 redirect_url = resp.headers['location']
@@ -342,20 +387,9 @@ class InstaloaderContext:
             if _attempt == self.max_connection_attempts:
                 raise ConnectionException(error_string) from err
             self.error(error_string + " [retrying; skip with ^C]", repeat_at_end=False)
-            text_for_429 = ("HTTP error code 429 was returned because too many queries occured in the last time. "
-                            "Please do not use Instagram in your browser or run multiple instances of Instaloader "
-                            "in parallel.")
             try:
                 if isinstance(err, TooManyRequestsException):
-                    print(textwrap.fill(text_for_429), file=sys.stderr)
-                    if is_graphql_query:
-                        print("Made {} GraphQL requests.".format(len(self.query_timestamps)), file=sys.stderr)
-                        waittime = graphql_query_waittime(untracked_queries=True)
-                        if waittime > 0:
-                            self.log('The request will be retried in {} seconds, at {:%H:%M}.'
-                                     .format(waittime, datetime.now() + timedelta(seconds=waittime)))
-                            time.sleep(waittime)
-                self._sleep()
+                    self._ratecontrol_graphql_query(params['query_hash'], untracked_queries=True)
                 return self.get_json(path=path, params=params, host=host, session=sess, _attempt=_attempt + 1)
             except KeyboardInterrupt:
                 self.error("[skipped by user]", repeat_at_end=False)
@@ -440,15 +474,17 @@ class InstaloaderContext:
         :raises ConnectionException: When query repeatedly failed.
 
         .. versionadded:: 4.2.1"""
-        tempsession = copy_session(self._session)
-        tempsession.headers['User-Agent'] = 'Instagram 10.3.2 (iPhone7,2; iPhone OS 9_3_3; en_US; en-US; ' \
-                                            'scale=2.00; 750x1334) AppleWebKit/420+'
-        for header in ['Host', 'Origin', 'X-Instagram-AJAX', 'X-Requested-With']:
-            tempsession.headers.pop(header, None)
-        return self.get_json(path, params, 'i.instagram.com', tempsession)
+        with copy_session(self._session) as tempsession:
+            tempsession.headers['User-Agent'] = 'Instagram 10.3.2 (iPhone7,2; iPhone OS 9_3_3; en_US; en-US; ' \
+                                                'scale=2.00; 750x1334) AppleWebKit/420+'
+            for header in ['Host', 'Origin', 'X-Instagram-AJAX', 'X-Requested-With']:
+                tempsession.headers.pop(header, None)
+            return self.get_json(path, params, 'i.instagram.com', tempsession)
 
     def write_raw(self, resp: Union[bytes, requests.Response], filename: str) -> None:
-        """Write raw response data into a file."""
+        """Write raw response data into a file.
+
+        .. versionadded:: 4.2.1"""
         self.log(filename, end=' ', flush=True)
         with open(filename, 'wb') as file:
             if isinstance(resp, requests.Response):
@@ -461,32 +497,22 @@ class InstaloaderContext:
 
         :raises QueryReturnedNotFoundException: When the server responds with a 404.
         :raises QueryReturnedForbiddenException: When the server responds with a 403.
-        :raises ConnectionException: When download repeatedly failed."""
-        try:
-            with self.get_anonymous_session() as anonymous_session:
-                resp = anonymous_session.get(url, stream=True)
-            if resp.status_code == 200:
-                resp.raw.decode_content = True
-                return resp
-            else:
-                if resp.status_code == 403:
-                    # suspected invalid URL signature
-                    raise QueryReturnedForbiddenException("403 when accessing {}.".format(url))
-                if resp.status_code == 404:
-                    # 404 not worth retrying.
-                    raise QueryReturnedNotFoundException("404 when accessing {}.".format(url))
-                raise ConnectionException("HTTP error code {}.".format(resp.status_code))
-        except (urllib3.exceptions.HTTPError, requests.exceptions.RequestException, ConnectionException) as err:
-            error_string = "URL {}: {}".format(url, err)
-            if _attempt == self.max_connection_attempts:
-                raise ConnectionException(error_string) from err
-            self.error(error_string + " [retrying; skip with ^C]", repeat_at_end=False)
-            try:
-                self._sleep()
-                return self.get_raw(url, _attempt + 1)
-            except KeyboardInterrupt:
-                self.error("[skipped by user]", repeat_at_end=False)
-                raise ConnectionException(error_string) from err
+        :raises ConnectionException: When download failed.
+
+        .. versionadded:: 4.2.1"""
+        with self.get_anonymous_session() as anonymous_session:
+            resp = anonymous_session.get(url, stream=True)
+        if resp.status_code == 200:
+            resp.raw.decode_content = True
+            return resp
+        else:
+            if resp.status_code == 403:
+                # suspected invalid URL signature
+                raise QueryReturnedForbiddenException("403 when accessing {}.".format(url))
+            if resp.status_code == 404:
+                # 404 not worth retrying.
+                raise QueryReturnedNotFoundException("404 when accessing {}.".format(url))
+            raise ConnectionException("HTTP error code {}.".format(resp.status_code))
 
     def get_and_write_raw(self, url: str, filename: str) -> None:
         """Downloads and writes anonymously-requested raw data into a file.

instaloader/structures.py

@@ -17,11 +17,16 @@ PostSidecarNode.is_video.__doc__ = "Whether this node is a video."
 PostSidecarNode.display_url.__doc__ = "URL of image or video thumbnail."
 PostSidecarNode.video_url.__doc__ = "URL of video or None."
 
-PostComment = namedtuple('PostComment', ['id', 'created_at_utc', 'text', 'owner'])
-PostComment.id.__doc__ = "ID number of comment."
-PostComment.created_at_utc.__doc__ = ":class:`~datetime.datetime` when comment was created (UTC)."
-PostComment.text.__doc__ = "Comment text."
-PostComment.owner.__doc__ = "Owner :class:`Profile` of the comment."
+PostCommentAnswer = namedtuple('PostCommentAnswer', ['id', 'created_at_utc', 'text', 'owner'])
+PostCommentAnswer.id.__doc__ = "ID number of comment."
+PostCommentAnswer.created_at_utc.__doc__ = ":class:`~datetime.datetime` when comment was created (UTC)."
+PostCommentAnswer.text.__doc__ = "Comment text."
+PostCommentAnswer.owner.__doc__ = "Owner :class:`Profile` of the comment."
+
+PostComment = namedtuple('PostComment', (*PostCommentAnswer._fields, 'answers'))
+for field in PostCommentAnswer._fields:
+    getattr(PostComment, field).__doc__ = getattr(PostCommentAnswer, field).__doc__
+PostComment.answers.__doc__ = r"Iterator which yields all :class:`PostCommentAnswer`\ s for the comment."
 
 PostLocation = namedtuple('PostLocation', ['id', 'name', 'slug', 'has_public_page', 'lat', 'lng'])
 PostLocation.id.__doc__ = "ID number of location."
@@ -128,6 +133,9 @@ class Post:
             pic_json = self._context.get_json("p/{0}/".format(self.shortcode), params={})
             self._full_metadata_dict = pic_json['entry_data']['PostPage'][0]['graphql']['shortcode_media']
             self._rhx_gis_str = pic_json['rhx_gis']
+            if self.shortcode != self._full_metadata_dict['shortcode']:
+                self._node.update(self._full_metadata_dict)
+                raise PostChangedException
 
     @property
     def _full_metadata(self) -> Dict[str, Any]:
@@ -280,34 +288,72 @@ class Post:
 
     @property
     def comments(self) -> int:
-        """Comment count"""
-        return self._field('edge_media_to_comment', 'count')
+        """Comment count including answers"""
+        try:
+            return self._field('edge_media_to_parent_comment', 'count')
+        except KeyError:
+            return self._field('edge_media_to_comment', 'count')
 
     def get_comments(self) -> Iterator[PostComment]:
-        """Iterate over all comments of the post.
+        r"""Iterate over all comments of the post.
 
         Each comment is represented by a PostComment namedtuple with fields text (string), created_at (datetime),
-        id (int) and owner (:class:`Profile`).
+        id (int), owner (:class:`Profile`) and answers (:class:`~typing.Iterator`\ [:class:`PostCommentAnswer`])
+        if available.
         """
+        def _postcommentanswer(node):
+            return PostCommentAnswer(id=int(node['id']),
+                                     created_at_utc=datetime.utcfromtimestamp(node['created_at']),
+                                     text=node['text'],
+                                     owner=Profile(self._context, node['owner']))
+
+        def _postcommentanswers(node):
+            if 'edge_threaded_comments' not in node:
+                return
+            answer_count = node['edge_threaded_comments']['count']
+            if answer_count == 0:
+                # Avoid doing additional requests if there are no comment answers
+                return
+            answer_edges = node['edge_threaded_comments']['edges']
+            if answer_count == len(answer_edges):
+                # If the answer's metadata already contains all comments, don't do GraphQL requests to obtain them
+                yield from (_postcommentanswer(comment['node']) for comment in answer_edges)
+                return
+            yield from (_postcommentanswer(answer_node) for answer_node in
+                        self._context.graphql_node_list("51fdd02b67508306ad4484ff574a0b62",
+                                                        {'comment_id': node['id']},
+                                                        'https://www.instagram.com/p/' + self.shortcode + '/',
+                                                        lambda d: d['data']['comment']['edge_threaded_comments']))
+
         def _postcomment(node):
-            return PostComment(id=int(node['id']),
-                               created_at_utc=datetime.utcfromtimestamp(node['created_at']),
-                               text=node['text'],
-                               owner=Profile(self._context, node['owner']))
+            return PostComment(*_postcommentanswer(node),
+                               answers=_postcommentanswers(node))
         if self.comments == 0:
             # Avoid doing additional requests if there are no comments
             return
-        comment_edges = self._field('edge_media_to_comment', 'edges')
-        if self.comments == len(comment_edges):
-            # If the Post's metadata already contains all comments, don't do GraphQL requests to obtain them
+        try:
+            comment_edges = self._field('edge_media_to_parent_comment', 'edges')
+            answers_count = sum([edge['node']['edge_threaded_comments']['count'] for edge in comment_edges])
+            threaded_comments_available = True
+        except KeyError:
+            comment_edges = self._field('edge_media_to_comment', 'edges')
+            answers_count = 0
+            threaded_comments_available = False
+
+        if self.comments == len(comment_edges) + answers_count:
+            # If the Post's metadata already contains all parent comments, don't do GraphQL requests to obtain them
             yield from (_postcomment(comment['node']) for comment in comment_edges)
             return
         yield from (_postcomment(node) for node in
-                    self._context.graphql_node_list("33ba35852cb50da46f5b5e889df7d159",
-                                                    {'shortcode': self.shortcode},
-                                                    'https://www.instagram.com/p/' + self.shortcode + '/',
-                                                    lambda d: d['data']['shortcode_media']['edge_media_to_comment'],
-                                                    self._rhx_gis))
+                    self._context.graphql_node_list(
+                        "97b41c52301f77ce508f55e66d17620e" if threaded_comments_available
+                        else "f0986789a5c5d17c2400faebf16efd0d",
+                        {'shortcode': self.shortcode},
+                        'https://www.instagram.com/p/' + self.shortcode + '/',
+                        lambda d:
+                        d['data']['shortcode_media'][
+                            'edge_media_to_parent_comment' if threaded_comments_available else 'edge_media_to_comment'],
+                        self._rhx_gis))
 
     def get_likes(self) -> Iterator['Profile']:
         """Iterate over all likes of the post. A :class:`Profile` instance of each likee is yielded."""
@@ -396,28 +442,27 @@ class Profile:
     @classmethod
     def from_id(cls, context: InstaloaderContext, profile_id: int):
         """Create a Profile instance from a given userid. If possible, use :meth:`Profile.from_username`
-        or constructor directly rather than this method, since it does many requests.
+        or constructor directly rather than this method, since it requires more requests.
 
         :param context: :attr:`Instaloader.context`
         :param profile_id: userid
-        :raises: :class:`ProfileNotExistsException`, :class:`ProfileHasNoPicsException`
+        :raises: :class:`ProfileNotExistsException`
         """
         if profile_id in context.profile_id_cache:
             return context.profile_id_cache[profile_id]
-        data = context.graphql_query("472f257a40c653c64c666ce877d59d2b",
-                                     {'id': str(profile_id), 'first': 1},
+        data = context.graphql_query('7c16654f22c819fb63d1183034a5162f',
+                                     {'user_id': str(profile_id),
+                                      'include_chaining': False,
+                                      'include_reel': True,
+                                      'include_suggested_users': False,
+                                      'include_logged_out_extras': False,
+                                      'include_highlight_reels': False},
                                      rhx_gis=context.root_rhx_gis)['data']['user']
         if data:
-            data = data["edge_owner_to_timeline_media"]
+            profile = cls(context, data['reel']['owner'])
         else:
             raise ProfileNotExistsException("No profile found, the user may have blocked you (ID: " +
                                             str(profile_id) + ").")
-        if not data['edges']:
-            if data['count'] == 0:
-                raise ProfileHasNoPicsException("Profile with ID {0}: no pics found.".format(str(profile_id)))
-            else:
-                raise LoginRequiredException("Login required to determine username (ID: " + str(profile_id) + ").")
-        profile = Post(context, data['edges'][0]['node']).owner_profile
         context.profile_id_cache[profile_id] = profile
         return profile
 

test/instaloader_unittests.py

@@ -17,9 +17,12 @@ OWN_USERNAME = "aandergr"
 NORMAL_MAX_COUNT = 2
 PAGING_MAX_COUNT = 15
 PRIVATE_PROFILE = "aandergr"
+PRIVATE_PROFILE_ID = 1706625676
+EMPTY_PROFILE = "not_public"
+EMPTY_PROFILE_ID = 1928659031
 
 # Preserve query timestamps (rate control) between tests to not get rate limited
-instaloadercontext_query_timestamps = list()
+instaloadercontext_query_timestamps = dict()
 
 
 class TestInstaloaderAnonymously(unittest.TestCase):
@@ -32,11 +35,11 @@ class TestInstaloaderAnonymously(unittest.TestCase):
                                          download_comments=True,
                                          save_metadata=True)
         self.L.context.raise_all_errors = True
-        self.L.context.query_timestamps = instaloadercontext_query_timestamps
+        self.L.context.query_timestamps = instaloadercontext_query_timestamps.copy()
 
     def tearDown(self):
         global instaloadercontext_query_timestamps
-        instaloadercontext_query_timestamps = self.L.context.query_timestamps
+        instaloadercontext_query_timestamps = self.L.context.query_timestamps.copy()
         self.L.close()
         os.chdir('/')
         print("Removing {}".format(self.dir))
@@ -83,10 +86,18 @@ class TestInstaloaderAnonymously(unittest.TestCase):
         self.assertEqual(PUBLIC_PROFILE_ID,
                          instaloader.Profile.from_username(self.L.context, PUBLIC_PROFILE).userid)
 
-    def test_get_username_by_id(self):
+    def test_get_username_by_id_private(self):
+        self.assertEqual(PRIVATE_PROFILE.lower(),
+                         instaloader.Profile.from_id(self.L.context, PRIVATE_PROFILE_ID).username)
+
+    def test_get_username_by_id_public(self):
         self.assertEqual(PUBLIC_PROFILE.lower(),
                          instaloader.Profile.from_id(self.L.context, PUBLIC_PROFILE_ID).username)
 
+    def test_get_username_by_id_empty(self):
+        self.assertEqual(EMPTY_PROFILE.lower(),
+                         instaloader.Profile.from_id(self.L.context, EMPTY_PROFILE_ID).username)
+
     def test_post_from_mediaid(self):
         for post in instaloader.Profile.from_username(self.L.context, PUBLIC_PROFILE).get_posts():
             post2 = instaloader.Post.from_mediaid(self.L.context, post.mediaid)
@@ -130,6 +141,9 @@ class TestInstaloaderLoggedIn(TestInstaloaderAnonymously):
     def test_private_profile_paging(self):
         self.post_paging_test(instaloader.Profile.from_username(self.L.context, PRIVATE_PROFILE).get_posts())
 
+    def test_profile_pic_download(self):
+        self.L.download_profile(PUBLIC_PROFILE, profile_pic_only=True)
+
     def test_feed_download(self):
         self.L.download_feed_posts(NORMAL_MAX_COUNT)
 
@@ -166,10 +180,6 @@ class TestInstaloaderLoggedIn(TestInstaloaderAnonymously):
         for f in profile.get_followers():
             print(f.username)
 
-    def test_get_username_by_id(self):
-        self.assertEqual(PUBLIC_PROFILE.lower(),
-                         instaloader.Profile.from_id(self.L.context, PUBLIC_PROFILE_ID).username)
-
     def test_get_likes(self):
         for post in instaloader.Profile.from_username(self.L.context, OWN_USERNAME).get_posts():
             for like in post.get_likes():