[extractor/iprima] Fix extractor (relax nuxt function regex, add js_to_json hack)

[std-move]

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Description of your pull request and other information

Fixes the extractor issue mentioned in the latest comment in #6524 (comment), but not the originally reported issue (unable to verify/reproduce that one as I don't have a paid account). Details:

// Fixes #7229

the iPrima extractor has been broken due to failure to extract nuxt_js data. This happens due to additional code being present before the return object statement. Shortened example:

window.__NUXT__=(function(a,b,[...],n,[...],z){n.ulid="DUMMY";n.avatarUrl="<URI>";[...];return {data:{$dataId:{content:{id:q,drupalId:"141111",playId:r,[...]

This additional code that modified a passed parameter is not needed for us to successfully extract the data we need. I have relaxed the regex to allow this additional code to be present.

The second issue was that js_to_json failed due to an Array() parameter being present. Shortened example of the input:

[null,false,"none","ČR",true,"series",[..],Array(10),"p1176840",[...],"p822076"]

Without the changes I've made to the function, quotes get added around Array, resulting in the following parsing exception:

json.decoder.JSONDecodeError: Expecting ',' delimiter in 'u","Array"(10),"p117': line 1 column 1707 (char 1706)

Matching the whole line in the regex is required as the Array parameter is only a part of the original array. This code is not very nice but then again js_to_json is kinda hacky anyway, it is not a proper parser.

This should make the extractor work again and hopefully not break other things. Suggestions to improve the code are very much welcome.

Template

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• Fix or improvement to an extractor (Make sure to add/update tests)
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• Core bug fix/improvement
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Copilot Summary

🤖 Generated by Copilot at 5782255

Summary

🐛🔧🚀

Fix Nuxt.js metadata extraction for some websites by improving regexes for common.py and adding Array constructor handling in _utils.py.

Nuxt.js metadata
Array or logic, no matter
Autumn leaves adapt

Walkthrough

• Fix Nuxt.js metadata extraction by allowing any code before the return statement in the function that provides the data (link)
• Handle arrays that are constructed with the Array constructor instead of the literal syntax in the metadata by converting them to JSON arrays (link)

[bashonly]

see #7229 (comment)

[std-move]

Adjusted for latest changes to iPrima

[bashonly]

pre-release build available for testing:
edit: just update yt-dlp

[milanv74]

Hello @std-move, this is my log with the test movie, I have a paid access to prima+:

[debug] Command-line config: ['-vU', '-u', 'PRIVATE', '-p', 'PRIVATE', 'https://www.iprima.cz/serialy/zoo/zoo/126-epizoda-126']
[debug] Encodings: locale cp1250, fs utf-8, pref cp1250, out utf-8, error utf-8, screen utf-8
[debug] yt-dlp version stable@2023.07.22.013310 [eed15ae] (win32_dir)
[debug] Python 3.8.10 (CPython AMD64 64bit) - Windows-10-10.0.19045-SP0 (OpenSSL 1.1.1k 25 Mar 2021)
[debug] exe versions: none
[debug] Optional libraries: Cryptodome-3.18.0, brotli-1.0.9, certifi-2023.05.07, mutagen-1.46.0, sqlite3-2.6.0, websockets-11.0.3
[debug] Proxy map: {}
[debug] Loaded 1857 extractors
[debug] Fetching release info: https://api.github.com/repos/yt-dlp/yt-dlp/releases/latest
Available version: stable@2023.07.06, Current version: stable@2023.07.22.013310
yt-dlp is up to date (stable@2023.07.22.013310)
[IPrima] Downloading login page
[IPrima] Logging in
[IPrima] Downloading token
[IPrima] Extracting URL: https://www.iprima.cz/serialy/zoo/zoo/126-epizoda-126
[IPrima] 126-epizoda-126: Downloading webpage
[IPrima] p1232709: Getting manifest URLs
ERROR: [IPrima] 126-epizoda-126: Access to stream infos forbidden
File "yt_dlp\extractor\common.py", line 715, in extract
File "yt_dlp\extractor\iprima.py", line 159, in _real_extract
File "yt_dlp\extractor\iprima.py", line 120, in _raise_access_error
File "yt_dlp\extractor\common.py", line 1193, in raise_no_formats

Thank you for your support.

[std-move]

Looks like you have a paid account. Another user has reported a similar error in issue #6524, I would advise you to add the report here.

With my free user account, the download works ok. So as a temporary workaround, you can create a new free account and use that one to download the show, albeit in 'non-HD' quality. To make the extractor work with paid accounts, some changes would be required I guess (unless the content is DRMed, in which case it wouldn't help, as DRM circumvention is against yt-dlp's policies)

[std-move]

Thanks @Grub4K for the suggestion, backreferences totally escaped me - they really simplify the code.

Also added simple tests for map/array constructor conversion as suggested.

Please review the changes again.

[Grub4K]

Looks good like that

[pukkandan]

Pls merge as 2 commits @bashonly