Superset 4.0.2: The REST API for thumbnail download is not working

[HARIP9080]

Hey all!
hope y'll doing great .

the endpoint for the above api is app/v1/{pk}/thumbnail/{digest}. Here in this im getting 404 and the response body is :

{
"message":Not found
}

even the caching is also enabled and changed the superset_config.py file.below the config file.i'm passing the required params also.

SECRET_KEY = '***'

Enable PNG export for dashboards

ENABLE_JAVASCRIPT = True
THUMBNAIL_ENABLED = True

Enable PNG export for dashboards

ENABLE_JAVASCRIPT = True
SCREENSHOT_FEATURE_ENABLED = True # Enables screenshot capture

Enable exporting dashboards as PNG

EXPORT_PNG_ENABLED = True

from cachelib.redis import RedisCache

Redis configuration

CACHE_CONFIG = {
"CACHE_TYPE": "RedisCache",
"CACHE_DEFAULT_TIMEOUT": 300, # Cache timeout in seconds
"CACHE_KEY_PREFIX": "superset_",
"CACHE_REDIS_HOST": "redis", # Redis service name in docker-compose
"CACHE_REDIS_PORT": 6379,
"CACHE_REDIS_DB": 0, # Default Redis database
"CACHE_REDIS_URL": "redis://redis:6379/0", # Redis URL
}

DATA_CACHE_CONFIG = CACHE_CONFIG # Use the same config for data cache

@dosu

[dosubot[bot]]

Hey @HARIP9080! 👋 Hope you're doing well. I'm here to help you with any bugs, questions, or contributions you have. Just give me a shout if you need assistance!

The 404 "Not found" error for the "app/v1/{pk}/thumbnail/{digest}" endpoint in Superset 4.0.2 likely occurs because the chart with the specified primary key (pk) does not exist. Ensure that the pk corresponds to an existing chart in the system. Additionally, verify that the "THUMBNAILS" feature is enabled, as it must be active for the endpoint to function properly ^[1][2].

To continue talking to Dosu, mention @dosu.

[HARIP9080]

In this api app/v1/dashbaord in where im getting the lis tof dashboard from there im taking the pk which is id and for digest im taking the thumbnail_url's value say this is the api/v1/dashboard/3/thumbnail/4fe956b468c1cd8c1600021326c6a932/?accept=image/
in this the digest is 4fe956b468c1cd8c1600021326c6a932. correct ?
@dosu

[dosubot[bot]]

Yes, you're correct. The digest in the URL should be the value you obtained from the thumbnail_url of the dashboard. Ensure that this digest matches exactly with what is stored in the cache for the thumbnail. If the digest is correct and you're still facing issues, double-check the cache configuration and ensure that the thumbnail caching is functioning as expected. Additionally, reviewing the server logs might provide more insights into why the thumbnail isn't being found.

To continue talking to Dosu, mention @dosu.

[HARIP9080]

how can i check if te digest is matching with the stored cache like with redis keys?
@dosu

[HARIP9080]

hey!
@dosu i didn't get an answer

[dosubot[bot]]

To check if the digest matches with the stored cache in Redis, you can use the redis Python library to interact with your Redis instance. Here's a basic example of how you can do this:

1. Install the Redis library if you haven't already:

   pip install redis

2. Connect to your Redis instance and check for the key:

   import redis
   
   # Connect to Redis
   r = redis.Redis(
       host='redis',  # Your Redis host
       port=6379,     # Your Redis port
       db=0           # Your Redis database
   )
   
   # Define the key pattern
   digest = '4fe956b468c1cd8c1600021326c6a932'  # Replace with your actual digest
   key_pattern = f'superset_thumb__dashboard__*{digest}*'
   
   # Check if the key exists
   keys = r.keys(key_pattern)
   if keys:
       print("Digest found in cache:", keys)
   else:
       print("Digest not found in cache.")

This script connects to your Redis instance and searches for keys that match the pattern associated with your digest. Adjust the host, port, and db parameters as needed to match your Redis configuration.

To continue talking to Dosu, mention @dosu.

[KamatchiGengatharan]

I have enabled caching for thumbnail generation still the caching is not working for thumbnail generation alone.