sayou-connector 0.3.8

Connector components for the Sayou Data Platform

sayou-connector

The Universal Data Ingestion Engine for Sayou Fabric.

sayou-connector provides a unified interface to fetch data from diverse sources—Local Files, Web URLs, and Databases—normalizing everything into a standard format called SayouPacket.

It separates the logic of Navigation (Generator) from Retrieval (Fetcher), enabling complex recursive crawling and pagination strategies out of the box.

💡 Core Philosophy

"Navigate First, Fetch Later."

Data collection is not just about downloading; it's about discovery. We decouple the responsibility into two roles:

1. Generator (Navigator): The "Brain". It decides what to fetch next (e.g., calculates DB offsets, finds next page links) and yields a Task.
2. Fetcher (Driver): The "Muscle". It executes the actual retrieval (e.g., HTTP GET, SQL Query) and returns a Packet.

This separation enables the Feedback Loop, where the result of a fetch (e.g., found links) feeds back into the Generator to discover more targets.

📦 Installation

pip install sayou-connector

⚡ Quick Start

The ConnectorPipeline manages the feedback loop between Generators and Fetchers.

from sayou.connector.pipeline import ConnectorPipeline

def run_demo():
    # 1. Initialize Pipeline
    pipeline = ConnectorPipeline()
    pipeline.initialize()

    # 2. Run (Example: Web Crawling)
    print("Starting Web Crawl...")
    
    # Returns an iterator of 'SayouPacket' objects
    packets = pipeline.run(
        source="https://news.daum.net/tech",
        strategy="requests",
        link_pattern=r"https://v\.daum\.net/v/\d+",
        max_depth=1
    )

    # 3. Process Results (Stream)
    for packet in packets:
        if packet.success:
            print(f"[Fetched] {packet.task.uri}")
            # packet.data contains the extracted content (dict, bytes, etc.)
            print(f"   Data: {str(packet.data)[:50]}...")
        else:
            print(f"[Error] {packet.error}")

if __name__ == "__main__":
    run_demo()

🔑 Key Concepts

Generators

• FileGenerator: Recursively scans directories to find files matching extensions or patterns.
• SqlGenerator: Generates paginated SQL queries (LIMIT/OFFSET) to fetch large tables in batches.
• WebCrawlGenerator: Manages a URL frontier queue for BFS/DFS web crawling with depth control.

Fetchers

• FileFetcher: Reads binary or text content from the local file system.
• SqliteFetcher: Executes SQL queries against SQLite databases securely.
• SimpleWebFetcher: Fetches HTML pages and extracts data/links using BeautifulSoup.

🤝 Contributing

We welcome contributions for new Fetchers (e.g., S3Fetcher, KafkaFetcher) or Generators (e.g., SitemapGenerator)!

📜 License

Apache 2.0 License © 2025 Sayouzone