233 lines
8.9 KiB
Python
233 lines
8.9 KiB
Python
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import boto3
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import time
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from configparser import ConfigParser
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import logging
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import os
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from botocore.exceptions import ClientError
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# Initialize logger
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logger = logging.getLogger(__name__)
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logger.setLevel(logging.INFO)
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# Initialize S3 & Textract clients
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s3_client = boto3.client('s3')
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textract_client = boto3.client('textract')
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# Function to generate a Unix timestamp
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def generate_unix_timestamp():
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# Get the current time in seconds since the epoch
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unix_timestamp = int(time.time())
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return unix_timestamp
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# Function to retrieve configuration values from S3
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def load_config_from_s3(bucket_name, file_key):
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# Download the config file from S3
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response = s3_client.get_object(Bucket=bucket_name, Key=file_key)
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config_content = response['Body'].read().decode('utf-8')
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# Parse the config file
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config_parser = ConfigParser()
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config_parser.read_string(config_content)
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# Convert the configuration to a dictionary
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config_dict = {}
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for section in config_parser.sections():
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config_dict[section] = {key.upper(): value for key, value in config_parser.items(section)}
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return config_dict
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# Function to move a file from source to destination in S3
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def move_file_within_s3(source_bucket, source_key, destination_key):
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try:
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# Copy the file to the destination folder
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s3_client.copy_object(Bucket=source_bucket, CopySource={'Bucket': source_bucket, 'Key': source_key}, Key=destination_key)
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# Delete the file from the source folder
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s3_client.delete_object(Bucket=source_bucket, Key=source_key)
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logger.info(f"File moved from {source_key} to {destination_key}")
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except ClientError as e:
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logger.error(f"Error moving file: {e}")
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except Exception as e:
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logger.error(f"Error moving file: {e}")
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# Function to get a list of PDF files in a given S3 folder
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def get_pdf_files_list_from_s3(source_bucket, source_folder):
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file_list = []
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# List S3 Object & iterate (as per max files allowed)
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s3_list_response = s3_client.list_objects_v2(Bucket=source_bucket, Prefix=source_folder)
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if s3_list_response and s3_list_response['ResponseMetadata']['HTTPStatusCode'] == 200 and s3_list_response['KeyCount'] != 0:
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objects = s3_list_response['Contents']
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for s3_object in objects:
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# Skip non-PDF files
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if not s3_object['Key'].lower().endswith('.pdf'):
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continue
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file_list.append(s3_object['Key'])
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return file_list
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def start_textract_analysis_job(
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bucket_name,
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document_file_name,
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analysis_feature_type,
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sns_topic_arn,
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sns_role_arn,
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):
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try:
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# Define the parameters for the start_document_analysis API
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start_document_analysis_params = {
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'DocumentLocation': {
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'S3Object': {
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'Bucket': bucket_name,
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'Name': document_file_name
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}
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},
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'FeatureTypes': analysis_feature_type, # Customize based on requirements
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'ClientRequestToken': 'unique-token-'+str(generate_unix_timestamp()), # Use a unique token for each request
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'JobTag': 'healthcare-contract', # Use a tag to identify your job
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'NotificationChannel': {
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'SNSTopicArn': sns_topic_arn,
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'RoleArn': sns_role_arn # Role to allow Textract service to notify SNS topic when response is ready
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}
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}
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logger.info('start_document_analysis_params ' + str(start_document_analysis_params))
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# Send the request to start document analysis
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textract_response = textract_client.start_document_analysis(**start_document_analysis_params)
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job_id = textract_response["JobId"]
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logger.info(
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"Started text analysis job %s on %s.", job_id, document_file_name
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)
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except ClientError:
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logger.exception("Couldn't analyze text in %s.", document_file_name)
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raise
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else:
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return job_id
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# AWS Lambda handler function
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def lambda_handler(event, context):
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try:
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# Extract AWS account ID and region from the Lambda ARN
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aws_account_id = context.invoked_function_arn.split(":")[4]
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aws_region = context.invoked_function_arn.split(":")[3]
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logger.info('## ENVIRONMENT VARIABLES\r' + str(os.environ))
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# Read environment variables
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property_file_path = os.environ.get('PROPERTY_FILE_S3_PATH', '')
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batch_id = os.environ.get('BATCH_ID', '')
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# Read config.properties
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file_path_array = property_file_path.split("/")
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# Valid if file_path_array has more than 2 elements
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if len(file_path_array) > 1:
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# Extract BUCKET_NAME and config_file_path
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S3_BUCKET_NAME = file_path_array[0]
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CONFIG_FILE_PATH = "/".join(file_path_array[1:])
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logger.info(f'S3_BUCKET_NAME: {S3_BUCKET_NAME}')
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logger.info(f'CONFIG_FILE_PATH: {CONFIG_FILE_PATH}')
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# Load config file
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config_dict = load_config_from_s3(S3_BUCKET_NAME, CONFIG_FILE_PATH)
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logger.info('## CONFIG DICTIONARY\r' + str(config_dict))
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# Extract configuration values
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SOURCE_LOCATION = config_dict['FOLDER_LOCATIONS']['SOURCE_LOCATION'].format(batch_id) # SOURCE_LOCATION
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STAGING_LOCATION = config_dict['FOLDER_LOCATIONS']['STAGING_LOCATION'].format(batch_id)
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ANALYSIS_FEATURE_TYPE = config_dict['OTHERS']['ANALYSIS_FEATURE_TYPE'].split(",") # Analysis FeatureType
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SENDER_MAX_FILES = int(config_dict['OTHERS']['SENDER_MAX_FILES'])
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SNS_TOPIC_ARN = config_dict['RESOURCES']['SNS_TOPIC_ARN'].replace("{aws_region}",aws_region).replace("{aws_account_id}",aws_account_id)
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TEXTRACT_ROLE_ARN = config_dict['RESOURCES']['TEXTRACT_ROLE_ARN'].replace("{aws_account_id}",aws_account_id) # Textract IAM Role ARN to publish to SNS
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logger.info('SOURCE_LOCATION: ' + SOURCE_LOCATION)
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logger.info('STAGING_LOCATION: ' + STAGING_LOCATION)
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logger.info('ANALYSIS_FEATURE_TYPE: ' + str(ANALYSIS_FEATURE_TYPE))
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logger.info('SNS_TOPIC_ARN: ' + SNS_TOPIC_ARN)
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logger.info('TEXTRACT_ROLE_ARN: ' + TEXTRACT_ROLE_ARN)
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logger.info('SENDER_MAX_FILES: ' + str(SENDER_MAX_FILES))
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# List S3 Object & iterate (as per max files allowed)
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files_list = get_pdf_files_list_from_s3(S3_BUCKET_NAME,SOURCE_LOCATION)
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if len(files_list):
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# File count
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file_count = 0
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for s3_file_key in files_list:
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# Construct the source and destination paths
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source_path = s3_file_key
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destination_path = STAGING_LOCATION + source_path.replace(SOURCE_LOCATION,"")
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# Move file to stagging
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move_file_within_s3(S3_BUCKET_NAME, source_path, destination_path)
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# Start Textract analysis job
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job_id = start_textract_analysis_job (
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S3_BUCKET_NAME,
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destination_path,
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ANALYSIS_FEATURE_TYPE,
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SNS_TOPIC_ARN,
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TEXTRACT_ROLE_ARN,
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)
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file_count = file_count + 1
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logger.info(str(file_count) + '. ' + str(s3_file_key) + " Job Id: " + str(job_id))
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if SENDER_MAX_FILES == file_count:
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break
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success_message = 'Total files sent to textract : '+ str(file_count)
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logger.info(success_message)
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return {
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'statusCode': 200,
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'body': success_message
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}
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else:
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message = 'No files found'
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logger.error(message)
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return {
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'statusCode': 500,
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'body': message
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}
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else:
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error_message = 'Incorrect value for ENVIRONMENT VARIABLES: PROPERTY_FILE_S3_PATH\r' + str(property_file_path)
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logger.error(error_message)
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return {
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'statusCode': 500,
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'body': error_message
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}
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except ClientError as e:
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# Handle specific Textract client errors
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error_message = f"Error in Textract operation: {e}"
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logger.error(error_message)
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return {
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'statusCode': 500,
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'body': error_message
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}
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except Exception as e:
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# Handle other exceptions
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error_message = f"Unexpected error: {e}"
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logger.error(error_message)
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return {
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'statusCode': 500,
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'body': error_message
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}
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