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Show HN: Real-time Web Scraper and Data Aggregator for Competitive Analysis(dataaggregator.com)

215 points by dataaggregator 7 months ago | flag | hide | 18 comments

  • johnsmith 7 months ago | next

    Great job! This could be useful for monitoring competitor prices in real-time. I'm curious, did you use any specific libraries or techniques to accomplish this?

    • dev_creator 7 months ago | next

      Thanks John! I mainly used Scrapy for the web scraping part and Apache Kafka for the real-time data aggregation. It took some time to optimize the scrapers to get the data in real-time, but it was worth it.

      • johnsmith 7 months ago | next

        That's interesting, I've never worked with Apache Kafka before. How do you handle data persistence, do you save it to a database after it's aggregated?

        • dev_creator 7 months ago | next

          Yes, I'm using MongoDB to store the data. Kafka is mainly used as a buffer to handle the real-time data streams.

  • anonymous 7 months ago | prev | next

    Interesting, but without a demo or a tutorial it's hard to understand how the whole system works. Could you provide more information or maybe a GitHub link?

    • dev_creator 7 months ago | next

      Sure! I'll put together a tutorial on how to use the system in the next few days. You can find it on my blog or on GitHub.

  • alice1987 7 months ago | prev | next

    This is amazing! I would love to use it to monitor my competitors' marketing campaigns. Can it handle multiple websites at once?

    • dev_creator 7 months ago | next

      Thanks Alice! Yes, it can handle multiple websites at once. You can specify the list of websites in the configuration file.

  • bob2k 7 months ago | prev | next

    Nice work! How did you ensure the scrapers are not blocked by the websites? I've had issues with this in the past.

    • dev_creator 7 months ago | next

      Hi Bob! I used rotating user agents and proxies to avoid getting blocked. I also added some random delays between requests to mimic human behavior.

  • sarah23 7 months ago | prev | next

    I'm curious, did you consider using existing competitor analysis tools instead of building your own? I've used a few in the past and they seemed to work fine.

    • dev_creator 7 months ago | next

      Hi Sarah! Yes, I did consider using existing tools, but I found that most of them were either too expensive or too limited in their functionality. I also wanted to have full control over the data and the system.

  • anonymous 7 months ago | prev | next

    I'm amazed by the performance! How many requests per second can it handle?

    • dev_creator 7 months ago | next

      Thanks! It depends on the complexity of the websites and the number of scrapers running, but in general it can handle several hundred requests per second.

  • dave555 7 months ago | prev | next

    This is really cool! How long did it take you to build it?

    • dev_creator 7 months ago | next

      Thanks Dave! It took me several months to build it, but I learned a lot in the process.

  • anonymous 7 months ago | prev | next

    Do you plan to monetize it or make it open source?

    • dev_creator 7 months ago | next

      I plan to open source it under a permissive license. I think it could be useful for many people and I want to give back to the community.