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Fix efficiency bug regarding {filename} in filename-pattern

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Avoid evaluating 'url' when preparing the filename if the
filename-pattern does not contain the "{filename}" token. This avoids
the URL to be queried even though it is not needed (e.g. with
--no-pictures).
This commit is contained in:
Alexander Graf 2021-01-04 17:26:50 +01:00
parent 850cd39be4
commit a2ce906fd0
1 changed files with 13 additions and 7 deletions
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20
instaloader/instaloader.py
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@ -524,11 +524,15 @@ class Instaloader:
self.context.two_factor_login(two_factor_code)
@staticmethod
def __prepare_filename(filename_template: str, url: str) -> str:
def __prepare_filename(filename_template: str, url: Callable[[], str]) -> str:
"""Replace filename token inside filename_template with url's filename and assure the directories exist.
.. versionadded:: 4.6"""
filename = filename_template.replace("{filename}", os.path.splitext(os.path.basename(urlparse(url).path))[0])
if "{filename}" in filename_template:
filename = filename_template.replace("{filename}",
os.path.splitext(os.path.basename(urlparse(url()).path))[0])
else:
filename = filename_template
os.makedirs(os.path.dirname(filename), exist_ok=True)
return filename
@ -549,7 +553,7 @@ class Instaloader:
dirname = _PostPathFormatter(post).format(self.dirname_pattern, target=target)
filename_template = os.path.join(dirname, self.format_filename(post, target=target))
filename = self.__prepare_filename(filename_template, post.url)
filename = self.__prepare_filename(filename_template, lambda: post.url)
# Download the image(s) / video thumbnail and videos within sidecars if desired
downloaded = True
@ -563,7 +567,8 @@ class Instaloader:
suffix = str(edge_number)
if '{filename}' in self.filename_pattern:
suffix = ''
filename = self.__prepare_filename(filename_template, sidecar_node.display_url)
# pylint:disable=cell-var-from-loop
filename = self.__prepare_filename(filename_template, lambda: sidecar_node.display_url)
# Download sidecar picture or video thumbnail (--no-pictures implies --no-video-thumbnails)
downloaded &= self.download_pic(filename=filename, url=sidecar_node.display_url,
mtime=post.date_local, filename_suffix=suffix)
@ -571,7 +576,8 @@ class Instaloader:
suffix = str(edge_number)
if '{filename}' in self.filename_pattern:
suffix = ''
filename = self.__prepare_filename(filename_template, sidecar_node.video_url)
# pylint:disable=cell-var-from-loop
filename = self.__prepare_filename(filename_template, lambda: sidecar_node.video_url)
# Download sidecar video if desired
downloaded &= self.download_pic(filename=filename, url=sidecar_node.video_url,
mtime=post.date_local, filename_suffix=suffix)
@ -690,13 +696,13 @@ class Instaloader:
date_local = item.date_local
dirname = _PostPathFormatter(item).format(self.dirname_pattern, target=target)
filename_template = os.path.join(dirname, self.format_filename(item, target=target))
filename = self.__prepare_filename(filename_template, item.url)
filename = self.__prepare_filename(filename_template, lambda: item.url)
downloaded = False
if not item.is_video or self.download_video_thumbnails is True:
url = item.url
downloaded = self.download_pic(filename=filename, url=url, mtime=date_local)
if item.is_video and self.download_videos is True:
filename = self.__prepare_filename(filename_template, str(item.video_url))
filename = self.__prepare_filename(filename_template, lambda: str(item.video_url))
downloaded |= self.download_pic(filename=filename, url=item.video_url, mtime=date_local)
# Save caption if desired
metadata_string = _ArbitraryItemFormatter(item).format(self.storyitem_metadata_txt_pattern).strip()