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Adding clearurls crate to clean tracking params from links and markdown. (#5018)
* Adding clearurls crate to clean tracking params from links and markdown. - Thanks to @jenrdikw for creating this - Fixes #4905 * Upgrading to new version of clearurls * Fix clippy
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15
Cargo.lock
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15
Cargo.lock
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@ -877,6 +877,20 @@ version = "0.7.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
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[[package]]
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name = "clearurls"
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version = "0.0.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e291c00af89ac0a5b400d9ba46a682e38015ae3cd8926dbbe85b3b864d550be3"
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dependencies = [
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"linkify",
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"percent-encoding",
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"regex",
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"serde",
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"serde_json",
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"url",
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]
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[[package]]
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name = "clokwerk"
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version = "0.4.0"
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@ -2781,6 +2795,7 @@ dependencies = [
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"actix-web",
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"anyhow",
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"cfg-if",
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"clearurls",
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"deser-hjson",
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"diesel",
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"doku",
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@ -49,6 +49,7 @@ use lemmy_utils::{
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utils::{
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markdown::{markdown_check_for_blocked_urls, markdown_rewrite_image_links},
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slurs::{build_slur_regex, remove_slurs},
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validation::clean_urls_in_text,
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},
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CACHE_DURATION_FEDERATION,
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};
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@ -947,6 +948,7 @@ pub async fn process_markdown(
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context: &LemmyContext,
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) -> LemmyResult<String> {
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let text = remove_slurs(text, slur_regex);
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let text = clean_urls_in_text(&text);
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markdown_check_for_blocked_urls(&text, url_blocklist)?;
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@ -30,7 +30,7 @@ use i_love_jesus::CursorKey;
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use lemmy_utils::{
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error::{LemmyErrorExt, LemmyErrorType, LemmyResult},
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settings::SETTINGS,
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utils::validation::clean_url_params,
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utils::validation::clean_url,
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};
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use regex::Regex;
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use rustls::{
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@ -305,7 +305,7 @@ pub fn diesel_url_update(opt: Option<&str>) -> LemmyResult<Option<Option<DbUrl>>
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// An empty string is an erase
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Some("") => Ok(Some(None)),
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Some(str_url) => Url::parse(str_url)
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.map(|u| Some(Some(clean_url_params(&u).into())))
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.map(|u| Some(Some(clean_url(&u).into())))
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.with_lemmy_type(LemmyErrorType::InvalidUrl),
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None => Ok(None),
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}
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@ -316,7 +316,7 @@ pub fn diesel_url_update(opt: Option<&str>) -> LemmyResult<Option<Option<DbUrl>>
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pub fn diesel_url_create(opt: Option<&str>) -> LemmyResult<Option<DbUrl>> {
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match opt {
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Some(str_url) => Url::parse(str_url)
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.map(|u| Some(clean_url_params(&u).into()))
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.map(|u| Some(clean_url(&u).into()))
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.with_lemmy_type(LemmyErrorType::InvalidUrl),
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None => Ok(None),
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}
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@ -81,6 +81,7 @@ markdown-it = { version = "0.6.1", optional = true }
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ts-rs = { workspace = true, optional = true }
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enum-map = { workspace = true, optional = true }
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cfg-if = "1"
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clearurls = { version = "0.0.4", features = ["linkify"] }
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[dev-dependencies]
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reqwest = { workspace = true }
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@ -1,4 +1,5 @@
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use crate::error::{LemmyErrorExt, LemmyErrorType, LemmyResult};
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use clearurls::UrlCleaner;
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use itertools::Itertools;
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use regex::{Regex, RegexBuilder, RegexSet};
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use std::sync::LazyLock;
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@ -10,12 +11,8 @@ static VALID_MATRIX_ID_REGEX: LazyLock<Regex> = LazyLock::new(|| {
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.expect("compile regex")
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});
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// taken from https://en.wikipedia.org/wiki/UTM_parameters
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static CLEAN_URL_PARAMS_REGEX: LazyLock<Regex> = LazyLock::new(|| {
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Regex::new(
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r"^(utm_source|utm_medium|utm_campaign|utm_term|utm_content|gclid|gclsrc|dclid|fbclid)=",
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)
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.expect("compile regex")
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});
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static URL_CLEANER: LazyLock<UrlCleaner> =
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LazyLock::new(|| UrlCleaner::from_embedded_rules().expect("compile clearurls"));
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const ALLOWED_POST_URL_SCHEMES: [&str; 3] = ["http", "https", "magnet"];
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const BODY_MAX_LENGTH: usize = 10000;
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@ -257,16 +254,22 @@ pub fn build_and_check_regex(regex_str_opt: &Option<&str>) -> LemmyResult<Option
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)
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}
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pub fn clean_url_params(url: &Url) -> Url {
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let mut url_out = url.clone();
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if let Some(query) = url.query() {
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let new_query = query
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.split_inclusive('&')
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.filter(|q| !CLEAN_URL_PARAMS_REGEX.is_match(q))
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.collect::<String>();
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url_out.set_query(Some(&new_query));
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/// Cleans a url of tracking parameters.
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pub fn clean_url(url: &Url) -> Url {
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match URL_CLEANER.clear_single_url(url) {
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Ok(res) => res.into_owned(),
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// If there are any errors, just return the original url
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Err(_) => url.clone(),
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}
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}
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/// Cleans all the links in a string of tracking parameters.
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pub fn clean_urls_in_text(text: &str) -> String {
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match URL_CLEANER.clear_text(text) {
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Ok(res) => res.into_owned(),
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// If there are any errors, just return the original text
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Err(_) => text.to_owned(),
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}
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url_out
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}
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pub fn check_site_visibility_valid(
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@ -357,7 +360,8 @@ mod tests {
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build_and_check_regex,
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check_site_visibility_valid,
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check_urls_are_valid,
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clean_url_params,
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clean_url,
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clean_urls_in_text,
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is_url_blocked,
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is_valid_actor_name,
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is_valid_bio_field,
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@ -378,18 +382,32 @@ mod tests {
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#[test]
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fn test_clean_url_params() -> LemmyResult<()> {
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let url = Url::parse("https://example.com/path/123?utm_content=buffercf3b2&utm_medium=social&user+name=random+user%20&id=123")?;
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let cleaned = clean_url_params(&url);
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let expected = Url::parse("https://example.com/path/123?user+name=random+user%20&id=123")?;
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let url = Url::parse("https://example.com/path/123?utm_content=buffercf3b2&utm_medium=social&user+name=random+user&id=123")?;
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let cleaned = clean_url(&url);
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let expected = Url::parse("https://example.com/path/123?user+name=random+user&id=123")?;
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assert_eq!(expected.to_string(), cleaned.to_string());
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let url = Url::parse("https://example.com/path/123")?;
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let cleaned = clean_url_params(&url);
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let cleaned = clean_url(&url);
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assert_eq!(url.to_string(), cleaned.to_string());
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Ok(())
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}
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#[test]
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fn test_clean_body() -> LemmyResult<()> {
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let text = "[a link](https://example.com/path/123?utm_content=buffercf3b2&utm_medium=social&user+name=random+user&id=123)";
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let cleaned = clean_urls_in_text(text);
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let expected = "[a link](https://example.com/path/123?user+name=random+user&id=123)";
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assert_eq!(expected.to_string(), cleaned.to_string());
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let text = "[a link](https://example.com/path/123)";
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let cleaned = clean_urls_in_text(text);
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assert_eq!(text.to_string(), cleaned);
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Ok(())
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}
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#[test]
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fn regex_checks() {
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assert!(is_valid_post_title("hi").is_err());
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