openedx-scorm-xblock 19.0.2

Scorm XBlock for Open edX

This is an XBlock to display SCORM content within the Open edX LMS and Studio. It will save student state and report scores to the progress tab of the course. Currently supports SCORM 1.2 and SCORM 2004 standard.

This XBlock was initially developed by Raccoon Gang and published as edx_xblock_scorm. It was later improved, published on Pypi and relicensed as AGPLv3 thanks to the support of Compliplus Ltd.

This XBlock is not compatible with its ancestor: older xblocks cannot be simply migrated to the newer one. However, this xblock can be installed next to the other one and run on the same platform for easier transition.

Features

• Full SCORM data student reports for staff users

• Fullscreen display on button pressed

• Optional display in pop-up window

• Integrated grading, compatible with rescoring

• Optional custom width navigation menu interpreted from manifest file

• Compatibility with Django storages, customizable storage backend

Installation

This XBlock was designed to work out of the box with Tutor (Ironwood release). It comes bundled by default in the official Tutor releases, such that there is no need to install it manually.

For non-Tutor platforms, you should install the Python package from Pypi:

pip install openedx-scorm-xblock

In the Open edX native installation, you will have to modify the files /edx/etc/lms.yml and /edx/etc/studio.yml. Replace

X_FRAME_OPTIONS: DENY

By

X_FRAME_OPTIONS: SAMEORIGIN

Usage

In the Studio, go to the advanced settings of your course (“Settings” 🡒 “Advanced Settings”). In the “Advanced Module List” add “scorm”. Then hit “Save changes”.

Go back to your course content. In the “Add New Component” section, click “Advanced”, and then “Scorm module”. Click “Edit” on the newly-created module: this is where you will upload your content package. It should be a .zip file containing an imsmanifest.xml file at the root. The content of the package will be displayed in the Studio and the LMS after you click “Save”.

Advanced configuration

Asset url

By default, SCORM modules will be accessible at “/scorm/” urls and static assets will be stored in “scorm” media folders – either on S3 or in the local storage, depending on your platform configuration. To change this behaviour, modify the xblock-specific LOCATION setting

XBLOCK_SETTINGS["ScormXBlock"] = {
    "LOCATION": "alternatevalue",
}

Custom storage backends

By default, static assets are stored in the default Open edX storage backend.

To override this behaviour, you should define a custom storage function. This function must take the xblock instance as its first and only argument. For instance, you can store assets in different directories depending on the XBlock organization with

def scorm_storage(xblock):
    from django.conf import settings
    from django.core.files.storage import get_storage_class
    from openedx.core.djangoapps.site_configuration.models import SiteConfiguration

    subfolder = SiteConfiguration.get_value_for_org(
        xblock.location.org, "SCORM_STORAGE_NAME", "default"
    )
    storage_location = os.path.join(settings.MEDIA_ROOT, subfolder)
    return get_storage_class(settings.DEFAULT_FILE_STORAGE)(
        location=storage_location, base_url=settings.MEDIA_URL + "/" + subfolder
    )

XBLOCK_SETTINGS["ScormXBlock"] = {
    "STORAGE_FUNC": scorm_storage,
}

This should be added both to the LMS and the CMS settings. Instead of a function, a string that points to an importable module may be passed

XBLOCK_SETTINGS["ScormXBlock"] = {
    "STORAGE_FUNC": "my.custom.storage.module.get_scorm_storage_function",
}

Note that the SCORM XBlock comes with extended S3 storage support out of the box. See the following section:

Accessing assets directly from storage

By default, scorm will proxy assets through the LMS. This is done for security and to make the backend generic enough to be used with different storage backends. However, to access assets directly from the default storage backend, add the following to the ScormXBlock settings:

XBLOCK_SETTINGS["ScormXBlock"] = {
    "PROXY_ASSETS_LMS": False,
}

Scorm will now use the configured storage backends default url method instead of proxying the data through the LMS. The url method must be defined on the configured storage class for this to work correctly.

S3 storage

The SCORM XBlock will serve static assets from S3 if it is configured as the default storage for Open edX.

However, to configure S3 storage specific to scorm xblock, add the following to your LMS and CMS settings

XBLOCK_SETTINGS["ScormXBlock"] = {
    "STORAGE_FUNC": "openedxscorm.storage.s3"
}

You may define the following additional settings in XBLOCK_SETTINGS["ScormXBlock"]:

• S3_BUCKET_NAME (default: AWS_STORAGE_BUCKET_NAME): to store SCORM assets in a specific bucket separate from the rest of your Open edX assets.

• S3_QUERY_AUTH (default: True): boolean flag (True or False) for query string authentication in S3 urls. If your bucket is public, set this value to False. But be aware that in such case your SCORM assets will be publicly available to everyone.

• S3_EXPIRES_IN (default: 604800): time duration (in seconds) for the presigned URLs to stay valid. The default is one week.

These settings may be added to Tutor by creating a plugin:

from tutor import hooks

hooks.Filters.ENV_PATCHES.add_item(
    (
        "openedx-common-settings",
        """
XBLOCK_SETTINGS["ScormXBlock"] = {
    "STORAGE_FUNC": "openedxscorm.storage.s3",
    "S3_BUCKET_NAME": "mybucket",
    ...
}"""
)

Development

Run unit tests with:

$ pytest /mnt/openedx-scorm-xblock/openedxscorm/tests.py

Troubleshooting

This XBlock is maintained by Zia Fazal from Edly. Community support is available from the official Open edX forum. Do you need help with this plugin? See the troubleshooting section from the Tutor documentation.

License

This work is licensed under the terms of the GNU Affero General Public License (AGPL).