This method is needed for YouTube stream tests, because when all YouTube tests are ran, the signatureTimestamp is known (the sts string) so a different body than the body present in the mocks is send by the extractor instance.
As a result, running all YouTube stream tests with the MockDownloader (like the CI does) will fail if this method is not called before fetching the page of a test.
Use the youtubei API for YouTube mixes. The corresponding has been updated because the new API breaks the tests of YoutubeMixPlaylistExtractorTest.
Remove some deprecated code (the old search code with the pbj JSON) and do some other improvements.
This commit updates mocks and reenables the test invalidId of the NotAvailable class of the YoutubePlaylistExtractorTest class beacuse with the youtubei/innertube API, it returns "Not found" and doesn't redirect to the YouTube homepage.
The expectedMetaInfo test of the MetaInfoTest class of the YoutubeSearchExtractorTest class was broken because YouTube removes the vaccine progress link of the WHO from the meta info so this commit removes it and the test is now passing.
Add the origin and the referer headers with the https://www.youtube.com value for YouTube JSON POST requests.
Don't add the consent cookie header for the requests which use the youtubei/innertube API because it's uneeded.
Fix some tests and update YouTube mocks
Change the domain from music.youtube.com to youtubei.googleapis.com.
Use a lightweight request to check if the hardcoded YouTubeMusic keys are valid. Increase the length of the response to 500 because if the key is invalid, the length of the response returned is higher than 250 and the response when the key is valid is higher than 1500.
Format the YoutubeMusicSearchExtractor file.
Update YouTube web client version and mocks
Add getSearchParameter, a new method in YoutubeSearchQueryHandlerFactory class which returns the params field for a search, or an empty string if there is no one.
Update mocks of YoutubeSearchExtractorTest.
On Windows, mocks are recorded and read with the Cp1252 encoding so it breaks the mocks on non ASCII characters for Linux OS (and so the CI).
The project is in Java 8, so we can't use FileReader(File, Charset) and FileReader(File, Charset) because these methods require Java 11. Instead of changing the Java version of the extractor, use OutputStreamWriter and FileOutputStream instead of FileWriter and InputStreamReader and FileInputStream instead of FileReader.
