* [instagram] Add extractor for instagram.com user profiles and pages
The extractor scrapes `instagram.com/<user>' timelines and
`instagram.com/p/<shortcode>' by mimicking the behaviour of a web
browser and extracting the sharedData JSON of the single pages.
Please note that this mean that for user timelines we also do an
extra request to the `instagram.com/p/<shortcode>' page but this
permit to have consistent (and all) information about the media
fetched.
The MD5 logic used for X-Instagram-GIS was documented in
<https://stackoverflow.com/questions/49786980/>
* [instagram] Test for keywords, not url for GraphImage and GraphSidecar
URLs returned by instagram seems not stable so avoid testing for
them and instead test for keyword returned.
* [instagram] Improve test of InstagramProfilepageExtractor
Also check the count of media returned.
* [instagram] Several cleanup and improvements
- Change description, subcategories to generate a better description in
docs/supportedsite.rst
- Remove not needed InstagramExtractor.__init__()
- Use text.parse_int() instead of directly using int() (the former is more
robust)
- Use self.request().json() instead of using json.loads() the
self.request().text()
- Add `pattern:' to check the URLs where we do not have a stable URLs.
It seems that only the subdomain is not stable.
Thanks to @mikf!
2655a2ea02