This takes the uppy chunking algorithm and combines it with some
form submission from resumable.js for parity with the current
backup controller to make local backup uploads work with uppy.
We can then use this to replace the resumable-upload component
and the resumable.js library from our codebase, once stable.
This is disabled by default, so people using local backups will not
be affected. The enable_experimental_backup_uploader site setting
must be enabled for this to work.
We want to be able to skip plugins from doing any work under
certain conditions, and to be able raise their own errors if
a file being uploaded is completely incompatible with the concept
of the plugin if it is enabled. For example, the UppyChecksum plugin
is happy to skip hashing large files, but the UppyUploadEncrypt
plugin from discourse-encrypt relies on the file being encrypted
to do anything with the upload, so it is considered a blocking
error if the user uploads a file that is too large.
This improves the base functions available in uppy-plugin-base and
extendable-uploader to handle this, as well as introducing a
HUGE_FILE_THRESHOLD_BYTES variable which represents 100MB in bytes,
matching the ExternalUploadManager::DOWNLOAD_LIMIT on the
server side.
discourse-encrypt to take advantage of this new functionality will
follow in discourse/discourse-encrypt#141
We want to be able to skip plugins from doing any work under
certain conditions, and to be able raise their own errors if
a file being uploaded is completely incompatible with the concept
of the plugin if it is enabled. For example, the UppyChecksum plugin
is happy to skip hashing large files, but the UppyUploadEncrypt
plugin from discourse-encrypt relies on the file being encrypted
to do anything with the upload, so it is considered a blocking
error if the user uploads a file that is too large.
This improves the base functions available in uppy-plugin-base and
extendable-uploader to handle this, as well as introducing a
HUGE_FILE_THRESHOLD_BYTES variable which represents 100MB in bytes,
matching the ExternalUploadManager::DOWNLOAD_LIMIT on the
server side.
discourse-encrypt to take advantage of this new functionality will
follow in https://github.com/discourse/discourse-encrypt/pull/141
This abstracts interaction with uppy for uppy plugin classes
into base classes for Preprocessor plugins, so anyone
making these uppy plugins doesn't have to think as much about uppy
underneath the hood. This also makes the logging and validation
nicer, and provides a more consistent way to emit progress and
completion events.
In a future commit, we will introduce another base class for
`UploadUploaderPlugin` which will be used to be able to hijack
the upload process to go to a different provider (e.g. for discourse-video)
