Recommended `query_plugins` request fails with many installed plugins

[desrosj]

Today I encountered a 414 Request-URI Too Long error on the recommended plugins page on a site with many installed plugins.

https://api.wordpress.org/plugins/info/1.2/
?action=query_plugins
&request%5Bpage%5D=1
&request%5Bper_page%5D=36
&request%5Blocale%5D=en_US
&request%5Bbrowse%5D=recommended
&request%5Binstalled_plugins%5D%5B1%5D=add-from-server
&request%5Binstalled_plugins%5D%5B2%5D=admin-color-schemes
&request%5Binstalled_plugins%5D%5B3%5D=advanced-custom-fields
&request%5Binstalled_plugins%5D%5B4%5D=tinymce-advanced
...
&request%5Binstalled_plugins%5D%5B334%5D=wp-smushit
&request%5Binstalled_plugins%5D%5B335%5D=woocommerce-payments
&request%5Binstalled_plugins%5D%5B336%5D=yoast-seo-wordpress-premium
&request%5Bwp_version%5D=6.7

This is a test site that I use for testing certain things (like auto-updates with many installed) and I recognize this is a large number of plugins. But it's not clear what the actual character limit is on the request.

If the limit is already at a reasonable level, perhaps the API could be updated to also accept a comma separated list of plugin names instead of an array to avoid having to repeat the entire request[installed_plugins][##]= string?

[Otto42]

How many plugins are you talking here, exactly?

Also, are you building this string, or is WordPress doing it through the plugin_api() function?

If it is a WordPress thing, then most likely this should be in core.trac.

[dd32]

Also, are you building this string, or is WordPress doing it through the plugin_api() function?

It's definitely WordPress building that.

This is probably something that should be handled on the API side, but will need a systems request to process.

[desrosj]

How many plugins are you talking here, exactly?

I have 340 plugins installed. Confirmed that it's plugin_api() in WordPress building the query.

I checked the full query, it's over 19k characters because of the repeated &request[installed_plugins][##]. After converting the format to &installed_plugins=akismet,wordpress-seo,jetpack,etc... the full request was only 6,331 characters.