I have a script that updates ArcGIS Online item thumbnails from images stored on our web server. We moved the images to a different web server and now the updates are failing with 'Could not identify file'. There is no problem accessing the image via URL. When I compare browser network traces accessing it on the old server and the new server I don't see anything obviously different. I expanded the image to 600x400 since that is the recommended minimum size with no luck. I've attached a script that can be run to recreate the problem. I'm planning on opening a ticket with ESRI, but thought I'd post it here first in case anybody has any ideas. I'm running on Python 3.11.10 from ArcGIS Pro 3.4.0
# To recreate problem
# 1. Update the ITEM_ID variable below to an ArcGIS online item that you own
# 2. Copy this entire script file and paste it into the ArcGIS Pro (make sure you are signed in)python analysis window, hit enter twice
# 3. Enter run_test()
ITEM_ID = '758054a99d934a9d9113d8a5faccf456'
from arcgis.gis import GIS
import requests
def test_upload_as_thumbnail (item, url):
try:
item.update(thumbnail = url)
print (f"Upload {url} to {item.id} as thumbnail succeeded")
except Exception as ex:
print (f"Upload {url} to {item.id} as thumbnail failed: {str(ex)}")
return
def test_download (url):
try:
requests.get(url).content
print (f"Download {url} succeeded")
except Exception as ex:
print (f"Download {url} failed: {str(ex)}")
return
def run_test():
gis = GIS('pro')
for url in ['http://maps.fieldmuseum.org/apps/ROWHWG/icons/FeatureLayer.png', # this one works
'https://rightofway.erc.uic.edu/wp-content/uploads/FeatureLayer_600_400.png', # this one fails
'https://rightofway.erc.uic.edu/wp-content/uploads/FeatureLayer.png']: # this one fails
test_download (url)
test_upload_as_thumbnail(gis.content.get(ITEM_ID), url)
Here is the output I get from the test script:
Download http://maps.fieldmuseum.org/apps/ROWHWG/icons/FeatureLayer.png succeeded
Upload http://maps.fieldmuseum.org/apps/ROWHWG/icons/FeatureLayer.png to 758054a99d934a9d9113d8a5faccf456 as thumbnail succeeded
Download https://rightofway.erc.uic.edu/wp-content/uploads/FeatureLayer_600_400.png succeeded
Upload https://rightofway.erc.uic.edu/wp-content/uploads/FeatureLayer_600_400.png to 758054a99d934a9d9113d8a5faccf456 as thumbnail failed: Could not identify file
Download https://rightofway.erc.uic.edu/wp-content/uploads/FeatureLayer.png succeeded
Upload https://rightofway.erc.uic.edu/wp-content/uploads/FeatureLayer.png to 758054a99d934a9d9113d8a5faccf456 as thumbnail failed: Could not identify file
