lambdasoup
lexbor
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lambdasoup | lexbor | |
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2 | 8 | |
330 | 561 | |
- | 1.4% | |
3.6 | 4.5 | |
6 months ago | 6 months ago | |
OCaml | C | |
MIT License | Apache License 2.0 |
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lambdasoup
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The State of Web Scraping in 2021
OCaml’s Lambda Soup (https://aantron.github.io/lambdasoup/) is a amazing library/, especially for those that prefer functional programming
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Soupault (soup-oh) is a tool that helps you create and manage static websites
It's used for sorting "widgets" (page processing steps) according to dependency lists that users can specify in the config (like `after = ["foo", "bar"]`).
Other than that, one thing I really like about OCaml is that the compiler team and most library maintainers are considerate towards downstream users with respect to compatibility.
The Lua interpreter [3] that soupault uses for its plugin API is a revived 20 year old research project. It only needed minor modifications to build with recent compiler versions.
lexbor
- Lexbor: Fast HTML Renderer library in C
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Andreas Kling (of SerenityOS fame) is building a new Linux browser using SerenityOS libraries
An HTML parser, probably the simplest relatively modern example I could find is 1MB https://github.com/lexbor/lexbor (haven't used it, but might look more into it now that I know it exists.)
- Lexbor: Open-source HTML Renderer library in C
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The State of Web Scraping in 2021
Lazyweb link: https://github.com/rushter/selectolax
although I don't follow the need to have what appears to be two completely separate HTML parsing C libraries as dependencies; seeing this in the readme for Modest gives me the shivers because lxml has _seen some shit_
> Modest is a fast HTML renderer implemented as a pure C99 library with no outside dependencies.
although its other dep seems much more cognizant about the HTML5 standard, for whatever that's worth: https://github.com/lexbor/lexbor#lexbor
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> It looks like the author of the article just googled some libraries for each language and didn't research the topic
Heh, oh, new to the Internet, are you? :-D
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Libraries for retrivieng html data from website
Lexbor is here: https://github.com/lexbor/lexbor
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What second language to learn after Python?
Well, regarding HTML5, what I've found was libxml (does not support tag-soup HTML5), https://github.com/lexbor/lexbor, for which I was unable to find good documentation ( see https://lexbor.com/docs/lexbor/#dom), Apache Xerces (appears to not support tag-soup HTML5 as well), and Gumbo, which does not appear to be active and to support selectors and XPath (although there are libraries that add that).
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You can't parse [X]HTML with regex
I think we've all (mostly?) tried it. It really is the Wild West of the web when you're trying to parse other people's HTML, though.
I've played around with this parser which is extremely quick. https://github.com/lexbor/lexbor
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How SerpApi sped up data extraction from HTML from 3s to 800ms (or How to profile and optimize Ruby code and C extension)
I’m glad to have the opportunity to contribute to an open-source project that is used by thousands of people. Hopefully, we will speed up Nokogiri (or XML parser it uses) to match the performance of html5ever or lexbor at some point in the future. 800 ms to extract data from HTML is still too much.
What are some alternatives?
myhtml - Fast C/C++ HTML 5 Parser. Using threads.
selectolax - Python binding to Modest and Lexbor engines (fast HTML5 parser with CSS selectors).
soupault - Static website generator based on HTML element tree rewriting
gumbo-parser - An HTML5 parsing library in pure C99
otoml - TOML parsing, manipulation, and pretty-printing library for OCaml (fully 1.0.0-compliant)
nokogiri-rust - Ruby FFI wrapper around scraper crate to be used instead of Nokogiri. Status: proof of concept.
pyppeteer - Headless chrome/chromium automation library (unofficial port of puppeteer)
ocaml-tsort - Easy to use and user-friendly topological sort module for OCaml
soupault.app - The source code of the soupault.app website
CPython - The Python programming language
colly - Elegant Scraper and Crawler Framework for Golang