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0.1.0 Aug 16, 2019

#828 in Web programming

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Apache-2.0 / MIT / MPL-2.0

426 lines

A HTML entity encoding library for Rust

crates.io version TravisCI build status Docs License

Example usage

All example assume a extern crate escaper; and use escaper::{relevant functions here}; is present.


escaper::encode_minimal() encodes an input string using a minimal set of HTML entities.

let title = "Cats & dogs";
let tag = format!("<title>{}</title>", encode_minimal(title));
assert_eq!(tag.as_slice(), "<title>Cats &amp; dogs</title>");

There is also a escaper::encode_attribute() function for encoding strings that are to be used as html attribute values.


escaper::decode_html() decodes an encoded string, replacing HTML entities with the

corresponding characters. Named, hex, and decimal entities are supported. A Result value is returned, with either the decoded string in Ok, or an error in Err.

let encoded = "Cats&#x20;&amp;&#32;dogs";
let decoded = match decode_html(encoded) {
  Err(reason) => panic!("Error {:?} at character {}", reason.kind, reason.position),
  Ok(s) => s
assert_eq!(decoded.as_slice(), "Cats & dogs");

Avoiding allocations

Both the encoding and decoding functions are available in forms that take a Writer for output rather than returning an String. These version can be used to avoid allocation and copying if the returned String was just going to be written to a Writer anyway.


MIT or Apache 2.0


Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in pgp by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.