Forked from kadnan/producer_consumer_parse_recipes.py
Created
December 7, 2020 13:58
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| import json | |
| from time import sleep | |
| from bs4 import BeautifulSoup | |
| from kafka import KafkaConsumer, KafkaProducer | |
| def publish_message(producer_instance, topic_name, key, value): | |
| try: | |
| key_bytes = bytes(key, encoding='utf-8') | |
| value_bytes = bytes(value, encoding='utf-8') | |
| producer_instance.send(topic_name, key=key_bytes, value=value_bytes) | |
| producer_instance.flush() | |
| print('Message published successfully.') | |
| except Exception as ex: | |
| print('Exception in publishing message') | |
| print(str(ex)) | |
| def connect_kafka_producer(): | |
| _producer = None | |
| try: | |
| _producer = KafkaProducer(bootstrap_servers=['localhost:9092'], api_version=(0, 10)) | |
| except Exception as ex: | |
| print('Exception while connecting Kafka') | |
| print(str(ex)) | |
| finally: | |
| return _producer | |
| def parse(markup): | |
| title = '-' | |
| submit_by = '-' | |
| description = '-' | |
| calories = 0 | |
| ingredients = [] | |
| rec = {} | |
| try: | |
| soup = BeautifulSoup(markup, 'lxml') | |
| # title | |
| title_section = soup.select('.recipe-summary__h1') | |
| # submitter | |
| submitter_section = soup.select('.submitter__name') | |
| # description | |
| description_section = soup.select('.submitter__description') | |
| # ingredients | |
| ingredients_section = soup.select('.recipe-ingred_txt') | |
| # calories | |
| calories_section = soup.select('.calorie-count') | |
| if calories_section: | |
| calories = calories_section[0].text.replace('cals', '').strip() | |
| if ingredients_section: | |
| for ingredient in ingredients_section: | |
| ingredient_text = ingredient.text.strip() | |
| if 'Add all ingredients to list' not in ingredient_text and ingredient_text != '': | |
| ingredients.append({'step': ingredient.text.strip()}) | |
| if description_section: | |
| description = description_section[0].text.strip().replace('"', '') | |
| if submitter_section: | |
| submit_by = submitter_section[0].text.strip() | |
| if title_section: | |
| title = title_section[0].text | |
| rec = {'title': title, 'submitter': submit_by, 'description': description, 'calories': calories, | |
| 'ingredients': ingredients} | |
| except Exception as ex: | |
| print('Exception while parsing') | |
| print(str(ex)) | |
| finally: | |
| return json.dumps(rec) | |
| if __name__ == '__main__': | |
| print('Running Consumer..') | |
| parsed_records = [] | |
| topic_name = 'raw_recipes' | |
| parsed_topic_name = 'parsed_recipes' | |
| consumer = KafkaConsumer(topic_name, auto_offset_reset='earliest', | |
| bootstrap_servers=['localhost:9092'], api_version=(0, 10), consumer_timeout_ms=1000) | |
| for msg in consumer: | |
| html = msg.value | |
| result = parse(html) | |
| parsed_records.append(result) | |
| consumer.close() | |
| sleep(5) | |
| if len(parsed_records) > 0: | |
| print('Publishing records..') | |
| producer = connect_kafka_producer() | |
| for rec in parsed_records: | |
| publish_message(producer, parsed_topic_name, 'parsed', rec) |
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