Open Source Go Web Scrapers

A web scraping system aiming to simplify data extraction from the web. ferret has a declarative query language that makes it easy to focus on the data that you need to get. ferret has the ability to scrape JS rendered pages, handle all page events, and emulate user interactions. the ferret was designed as a library from the ground up. it can be easily embedded into any Go application. ferret helps you to focus on the data you need using an easy-to-learn declarative language. ferret uses Chrome/Chromium via Chrome Devtools Protocol to handle dynamically rendered web pages. ferret is extremely extensible, and creating custom functions and types is super easy. ferret allows users to focus on the data. It abstracts away the technical details and complexity of underlying technologies using its own declarative language. It is extremely portable, extensible, and fast.

Golang-based distributed web crawler management platform, supporting various languages including Python, NodeJS, Go, Java, PHP and various web crawler frameworks including Scrapy, Puppeteer, Selenium. Please use docker-compose to one-click to start up. By doing so, you don't even have to configure MongoDB database. The frontend app interacts with the master node, which communicates with other components such as MongoDB, SeaweedFS and worker nodes. Master node and worker nodes communicate with each other via gRPC (a RPC framework). Tasks are scheduled by the task scheduler module in the master node, and received by the task handler module in worker nodes, which executes these tasks in task runners. Task runners are actually processes running spider or crawler programs, and can also send data through gRPC (integrated in SDK) to other data sources, e.g. MongoDB.

GOPA, a spider written in Golang, for Elasticsearch. Lightweight, low footprint, memory requirement should, be 100MB. Easy to deploy, no runtime or dependency required. Easy to use, no programming or script ability needed, out-of-box features. First of all, get it, two opinions: download the pre-built package or compile it yourself. Besides Elasticsearch, Gopa doesn't require any other dependencies, just simply run ./gopa to start the program. It's safety to press ctrl+c to stop the current running Gopa, Gopa will handle the rest, saving the checkpoint, you may restore the job later, but the world is still in your hand.

DataHen Till is a companion tool to your existing web scraper that instantly makes it scalable, maintainable, and more unblockable, with minimal code changes on your scraper. Integrates with any scraper in 5 minutes. Web scraping is usually easy to get started, especially on a small scale. However, as you try to scale it up, it gets exponentially difficult. Scraping 10,000 records can easily be done with simple web scraper scripts in any programming language, but as you try to scrape millions of pages, you would need to architect and build features on your web scraping script that allows you to scale, maintain and unblock your scrapers. Scraping to millions or even billions of records requires much more pre-planning. It's not simply running your existing web scraper script in a bigger CPU/Ram machine. More thoughts are needed.

Crawls web pages and prints any link it can find. Fast HTML SAX-parser (powered by golang.org/x/net/html) Small (below 1500 SLOC), idiomatic, 100% test-covered codebase. Grabs most of useful resources URLs (pics, videos, audios, forms, etc...) Found URLs are streamed to stdout and guaranteed to be unique (with fragments omitted) Scan depth (limited by starting host and path, by default - 0) can be configured. Can crawl rules and sitemaps from robots.txt. Brute mode - scan HTML comments for URLs (this can lead to bogus results) Make use of HTTP_PROXY / HTTPS_PROXY environment values + handle proxy auth. Directory-only scan mode (aka fast-scan)

GoSpider - Fast web spider written in Go. Fast web crawling. Brute force and parse sitemap.xml. Parse robots.txt. Generate and verify link from JavaScript files. Link Finder. Find AWS-S3 from response source. Find subdomains from the response source. Get URLs from Wayback Machine, Common Crawl, Virus Total, Alien Vault. Format output easy to Grep. Support Burp input. Crawl multiple sites in parallel.

Golang Web Scraper library for extracting data from web pages. Save results as CSV, JSON, XML