About the path error, I cannot really comment, I cannot debug it now myself. It also seems to be caused by a missing certificate?
Can you check if your learner has a generated certificate object in /admin/certificates/generatedcertificate/?
If yes, you can try to delete it and go through the testing again. You might have to also reset the learner state in staff debug in the LMS if you are re-testing with the same account. Additionally, try with a fresh user account.
If not, then there is probably still something to solve in regards of generating certificates.
THE SOLUTION:
We added a custom Amazon S3 compatible badges backend to the Cookiecutter Open edX Plugin by subclassing the original badgr.py for the sole purpose of replacing the existing file access methodology with a http request to an S3 bucket or Cloudfront distribution as the case may be.
Here’s the complete source for the backend:
# python stuff
import logging
import requests
# django stuff
from django.conf import settings
from django.core.validators import URLValidator
from django.core.exceptions import ValidationError
# openedx stuff
from lms.djangoapps.badges.backends.badgr import BadgrBackend
log = logging.getLogger(__name__)
class BadgrBoto3Backend(BadgrBackend):
def __init__(self):
super().__init__()
log.info("cookiecutter_plugin.badges.backends.badgr_boto3.BadgrBoto3Backend - ready.")
def _cookiecutter_boto3_uri(self, filename):
"""
return a valid awscli URI pointing to the AWS S3 bucket root, preferaby via
Cloudfront, otherwise via AWS S3 URI.
examples
filename: badge_classes/course_complete_badges/badge-icon-png-22.png
settings.AWS_S3_CUSTOM_DOMAIN: cdn.courses.smartlikefox.com
settings.AWS_STORAGE_BUCKET_NAME: smartlikefox-usa-prod-storage
S3 URI: s3://smartlikefox-usa-prod-storage
"""
try:
# example: https://cdn.courses.smartlikefox.com/badge_classes/course_complete_badges/badge-icon-png-22.png
aws_s3_custom_domain = "https://{aws_s3_custom_domain}/{filename}".format(
aws_s3_custom_domain=settings.AWS_S3_CUSTOM_DOMAIN, filename=filename
)
validate = URLValidator()
validate(aws_s3_custom_domain)
return aws_s3_custom_domain
except ValidationError:
# example: s3://smartlikefox-usa-prod-storage/badge_classes/course_complete_badges/badge-icon-png-22.png
aws_storage_bucket_name = "s3://{aws_storage_bucket_name}/{filename}".format(
aws_storage_bucket_name=settings.AWS_STORAGE_BUCKET_NAME, filename=filename
)
return aws_storage_bucket_name
def _create_badge(self, badge_class):
"""
Create the badge class on Badgr.
badge_class - badges.BadgeClass(models.Model)
badge_class.image - models.ImageField(upload_to='badge_classes')
"""
log.info("cookiecutter_plugin.badges.backends.badgr_boto3._create_badge() - start")
if badge_class is None or badge_class.image is None:
log.error("either received None for badge_class or badge_class.image is None")
return
image_filename = badge_class.image.name
boto3_uri = self._cookiecutter_boto3_uri(image_filename)
response = requests.get(boto3_uri)
if response.status_code != requests.codes.ok:
log.error(
"received {status_code} response on URI {uri}".format(status_code=response.status_code, uri=boto3_uri)
)
response.raise_for_status()
return
# ---------------------------------------------------------------------
# mcdaniel: everything following the http response is intended to match
# the default badges backend exactly.
# ---------------------------------------------------------------------
image_content = response.content
image_content_type = response.headers["content-type"]
files = {"image": (image_filename, image_content, image_content_type)}
data = {
"name": badge_class.display_name,
"criteriaUrl": badge_class.criteria,
"description": badge_class.description,
}
result = requests.post(
self._badge_create_url, headers=self._get_headers(), data=data, files=files, timeout=settings.BADGR_TIMEOUT
)
self._log_if_raised(result, data)
try:
result_json = result.json()
badgr_badge_class = result_json["result"][0]
badgr_server_slug = badgr_badge_class.get("entityId")
badge_class.badgr_server_slug = badgr_server_slug
badge_class.save()
except Exception as excep: # noqa: E902
log.error(
"Error on saving Badgr Server Slug of badge_class slug "
'"{0}" with response json "{1}" : {2}'.format(badge_class.slug, result.json(), excep)
)
log.info("cookiecutter_plugin.badges.backends.badgr_boto3._create_badge() - finish")
