This function retrieves textual data from Rossum's page_data API for an annotation and processes it to:
Fetch OCR document content Data: Make an HTTP GET request to the
page_dataendpoint of a specific annotation using the providedrossum_authorization_token.Retry Mechanism: Handle transient network or server issues by retrying up to 3 times in case of a non-200 HTTP response or exceptions.
Process Text Content: Iterate through the fetched text content for custom manipulations or pattern analysis.
import requests
def get_ocr_document_content(payload):
"""
Fetch page_data from annotation.
:param payload: Dictionary containing the payload with annotation information.
"""
token = payload.get("rossum_authorization_token")
annotation_url = payload.get("annotation", {}).get("url")
retries = 3
for attempt in range(retries):
try:
# Request to fetch text content from annotation
page_req = requests.get(
url=f"{annotation_url}/page_data?granularity=texts",
headers={"Authorization": f"Bearer {token}"}
)
if page_req.status_code == 200:
results = page_req.json().get("results", [])
# This part is optional iteration through all the text nodes
for page in results:
for item in page.get("items", []):
ocr_text = item.get("text", "")
if ocr_text:
# Here will be any kind of manipulation with the text you need to do.
print(ocr_text)
break # Exit retry loop if request is successful
else:
print(f"Attempt {attempt + 1} failed with status code {page_req.status_code}. Retrying...")
except requests.RequestException as e:
print(f"Attempt {attempt + 1} encountered an exception: {e}. Retrying...")