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user-test-activity download_value +retries #20

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user-test-activity download_value +retries #20

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42 changes: 30 additions & 12 deletions user-test-activity3.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
import os
import argparse
import HTTPAuthOptions
import time

# OData service base URL
#BASE_URL = "https://dhr1.cesnet.cz/odata/v2"
Expand Down Expand Up @@ -48,22 +49,39 @@ def get_products(auth, queries):

return products_by_query

def download_value(entity, entity_id, auth, entity_type, node_ids=None):
"""Download entity's $value (binary content) to tmp."""
def download_value(entity, entity_id, auth, entity_type, node_ids=None, retries=3):
"""Download entity's $value (binary content) to tmp. Retries on HTTP 429."""
if entity_type == 'Nodes':
url = f"{BASE_URL}/Products({entity_id})/{nodes_to_url(node_ids)}/$value"
else:
url = f"{BASE_URL}/{entity_type}({entity_id})/$value"
response = requests.get(url, auth=auth, stream=True)

if response.status_code == 200:
file_path = os.path.join(DOWNLOAD_DIR, f"{entity['Name']}")
with open(file_path, "wb") as f:
for chunk in response.iter_content(chunk_size=8192):
f.write(chunk)
logging.info(f"Downloaded {entity_type} {entity['Id']} to {file_path}")
else:
logging.error(f"Failed to download {entity_type} {entity['Id']} value: {response.status_code} {requests.status_codes._codes[response.status_code][0]}")

attempt = 0
while attempt <= retries:
response = requests.get(url, auth=auth, stream=True)

if response.status_code == 200:
file_path = os.path.join(DOWNLOAD_DIR, f"{entity['Name']}")
with open(file_path, "wb") as f:
for chunk in response.iter_content(chunk_size=8192):
f.write(chunk)
logging.info(f"Downloaded {entity_type} {entity['Id']} to {file_path}")
return # success, exit the function

elif response.status_code == 429:
attempt += 1
if attempt > retries:
break
wait_time = 20 * attempt # exponential backoff
logging.warning(f"Received 429. Retrying in {wait_time} seconds... (Attempt {attempt}/{retries})")
time.sleep(wait_time)
else:
break # don't retry on other status codes

logging.error(
f"Failed to download {entity_type} {entity['Id']} value: "
f"{response.status_code} {requests.status_codes._codes[response.status_code][0]}"
)

def inspect_nodes(auth, product_id, node_id, depth=0, max_depth=1):
"""Recursively explore Nodes and download some of their $value."""
Expand Down