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Extract alt text for media on Twitter

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Closes #588
This commit is contained in:
JustAnotherArchivist
2023-01-13 03:13:10 +00:00
parent ff5e2d61ee
commit a0414d92cf
1 changed files with 12 additions and 4 deletions
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16
snscrape/modules/twitter.py
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@@ -111,6 +111,7 @@ class Medium:
class Photo(Medium):
previewUrl: str
fullUrl: str
altText: typing.Optional[str] = None
@dataclasses.dataclass
@@ -126,12 +127,14 @@ class Video(Medium):
variants: typing.List[VideoVariant]
duration: typing.Optional[float] = None
views: typing.Optional[int] = None
altText: typing.Optional[str] = None
@dataclasses.dataclass
class Gif(Medium):
thumbnailUrl: str
variants: typing.List[VideoVariant]
altText: typing.Optional[str] = None
@dataclasses.dataclass
@@ -949,10 +952,13 @@ class _TwitterAPIScraper(snscrape.base.Scraper):
if format not in ('jpg', 'png'):
_logger.warning(f'Skipping photo with unknown format on tweet {tweetId}: {format!r}')
return
return Photo(
previewUrl = f'{baseUrl}?format={format}&name=small',
fullUrl = f'{baseUrl}?format={format}&name=large',
)
mKwargs = {
'previewUrl': f'{baseUrl}?format={format}&name=small',
'fullUrl': f'{baseUrl}?format={format}&name=large',
}
if medium.get('ext_alt_text'):
mKwargs['altText'] = medium['ext_alt_text']
return Photo(**mKwargs)
elif medium['type'] == 'video' or medium['type'] == 'animated_gif':
variants = []
for variant in medium['video_info']['variants']:
@@ -970,6 +976,8 @@ class _TwitterAPIScraper(snscrape.base.Scraper):
cls = Video
elif medium['type'] == 'animated_gif':
cls = Gif
if medium.get('ext_alt_text'):
mKwargs['altText'] = medium['ext_alt_text']
return cls(**mKwargs)
else:
_logger.warning(f'Unsupported medium type on tweet {tweetId}: {medium["type"]!r}')