lol-html
cargo-expand
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lol-html | cargo-expand | |
---|---|---|
8 | 16 | |
1,390 | 2,427 | |
1.9% | - | |
5.7 | 8.6 | |
about 1 month ago | 8 days ago | |
Rust | Rust | |
BSD 3-clause "New" or "Revised" License | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
lol-html
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Ask HN: A fast, Rust HTML parser that works?
So I'm doing some web scraping in Rust, and so I will need to parse HTML. [scraper](https://docs.rs/scraper/latest/scraper/) (which uses [html5ever](https://github.com/servo/html5ever)) is doing fine except that it's the bottleneck of my application.
So I need a faster parser. I've tried [tl](https://docs.rs/tl/latest/tl/) which would've been perfect except that it doesn't actually work on the HTML I have. When I try to `query_selector` the elements I need, it returns nothing.
[Kuchiki](https://docs.rs/kuchiki/latest/kuchiki/) is abandonded.
I couldn't figure out how to get [lol-html](https://github.com/cloudflare/lol-html) to work for me (it's designed for re-writing HTML, whatever that means). It doesn't seem to have an API to extract the inner text of an element.
[html5gum](https://github.com/untitaker/html5gum) seems to be just an HTML tokenizer, or otherwise just too low-level. I have not yet tried [quick-xml](https://github.com/tafia/quick-xml/) but judging from the README, it's pretty low-level too. I mean, if these are the only options left then I will try them. Otherwise, I would love to use a parser that's faster but as ergonomic as `scraper` or `tl`.
At this point, I would be happy with an Lxml bridge/port of some sort. I don't need to mutate HTML, just parse and read data from it.
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How much Rust work is actually going on at Cloudflare?
I'm also in the Workers org but I have had a bit of interaction with Rust. There's some Rust in the Workers runtime using lol-html for HTMLRewriter as well as some tooling and there's the full blown workers-rs framework that I work on, but that's about it for the Rust I work on regularly.
- Is there a library for manipulating HTML?
- pup: Parsing HTML at the Command Line
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Texting Robots: Taming robots.txt with Rust and 34 million tests
Thanks again and happy to answer any questions! My current unreleased Rust projects include a web crawler that uses Tokio + Tokio Console + Reqwest with this crate for robots.txt and a fast text extraction library using lol-html that I am planning to sprinkle with some minimal ML to get Readability.js style intelligent extraction (with training in Python). See Fathom for an example of the ML approach I'll likely take.
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Like JQ, but for HTML
I’d like to see a tool using lol-html [0] and their CSS selector API as a streaming HTML editor.
[0] https://github.com/cloudflare/lol-html
- Things you can’t do in Rust (and what to do instead)
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Problems with building a backend app in Rust in 2020
Cloudflare has open sourced lol-html, a "Low output latency streaming HTML parser/rewriter with CSS selector-based API". Is that what you are looking for?
cargo-expand
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What is Rust doing behind the scenes?
It's been superseded by https://github.com/dtolnay/cargo-expand
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Why dereferencing coercion is not used here?
Try installing cargo expand, it's useful to see how macros eventually get expanded. For example, if you run cargo expand on the following code
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Procedural Macros are really hard to understand
You can use cargo expand to see what your code expands to: https://github.com/dtolnay/cargo-expand
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[blog] Rust should own its debugger experience
Not too familiar with macros but does cargo-expand do what you want or did you mean something else?
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Help me understand the borrowing and moving variable concept!
Yes. You can use Tools > Expand Macro on the playground or install and run cargo-expand to see what the macro expands to. It just adds a & before the argument.
- Advanced Metaprogramming in C: A select statement
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How does declaring variables in macros work
cargo expand
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How to see macro's source code in crate?
Along with what others are saying, there is also cargo expand which can show you what code a macro generates
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How does Rust Python ffi work?
Something that may help you understand code with magic proc macros is this utility. It's basically a wrapper around a Rust compiler flag that allows you to expand macros for a file.
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How does libtest know which functions are marked with #[test]?
You can use https://github.com/dtolnay/cargo-expand to examine how it works.
What are some alternatives?
actor-rust-scraper - Experimental scraper in Rust suited for running locally or on the Apify platform. Inspired by Apify SDK.
saito-rust - A high-performance (reference) implementation of Saito in Rust
tq - Perform a lookup by CSS selector on an HTML input
proc-macro-workshop - Learn to write Rust procedural macros [Rust Latam conference, Montevideo Uruguay, March 2019]
yq - Command-line YAML, XML, TOML processor - jq wrapper for YAML/XML/TOML documents
rust - Empowering everyone to build reliable and efficient software.
tools - all-in collection of productivity scripts, CLI tools, utility libraries, fuse filesystems, and also some stuff
quote - Rust quasi-quoting
hq - lightweight command line HTML processor using CSS and XPath selectors
cargo-llvm-cov - Cargo subcommand to easily use LLVM source-based code coverage (-C instrument-coverage).
xidel - Command line tool to download and extract data from HTML/XML pages or JSON-APIs, using CSS, XPath 3.0, XQuery 3.0, JSONiq or pattern matching. It can also create new or transformed XML/HTML/JSON documents.
rustviz - Interactively Visualizing Ownership and Borrowing for Rust