feat(mdhtml): support cloaker fn, cleanup
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b43431cb03
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3d28f93f51
1 changed files with 45 additions and 30 deletions
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@ -1,15 +1,51 @@
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use html5ever::tendril::*;
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use html5ever::tokenizer::{BufferQueue, TagKind, Token, TokenSink, TokenSinkResult, Tokenizer};
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use html5ever::{tendril::SliceExt, tokenizer::{BufferQueue, TagKind, Token, TokenSink, TokenSinkResult, Tokenizer}};
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use comrak::{markdown_to_html, Options};
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/// In our case, our sink only contains a tokens vector
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#[derive(Debug, Clone, Default)]
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struct Sink {
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pub media_proxy: Option<String>,
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pub type Cloaker = Box<dyn Fn(&str) -> String>;
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#[derive(Default)]
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pub struct Sanitizer {
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pub cloaker: Option<Cloaker>,
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pub buffer: String,
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}
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impl TokenSink for Sink {
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pub fn safe_html(text: &str) -> String {
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Sanitizer::default().html(text)
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}
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pub fn safe_markdown(text: &str) -> String {
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Sanitizer::default().markdown(text)
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}
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impl Sanitizer {
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pub fn new(cloak: Cloaker) -> Self {
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Self {
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buffer: String::default(),
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cloaker: Some(cloak),
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}
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}
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pub fn markdown(self, text: &str) -> String {
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self.html(&markdown_to_html(text, &Options::default()))
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}
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pub fn html(self, text: &str) -> String {
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let mut input = BufferQueue::default();
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input.push_back(text.to_tendril().try_reinterpret().unwrap());
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let mut tok = Tokenizer::new(self, Default::default());
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let _ = tok.feed(&mut input);
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if !input.is_empty() {
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tracing::warn!("buffer input not empty after processing html");
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}
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tok.end();
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tok.sink.buffer
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}
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}
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impl TokenSink for Sanitizer {
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type Handle = ();
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/// Each processed token will be handled by this method
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@ -38,8 +74,8 @@ impl TokenSink for Sink {
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"img" => for attr in tag.attrs {
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match attr.name.local.as_ref() {
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"src" => {
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let src = if let Some(ref proxy) = self.media_proxy {
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format!("{proxy}{}", attr.value.as_ref())
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let src = if let Some(ref cloak) = self.cloaker {
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cloak(attr.value.as_ref())
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} else {
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attr.value.to_string()
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};
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@ -86,24 +122,3 @@ impl TokenSink for Sink {
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TokenSinkResult::Continue
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}
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}
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pub fn safe_markdown(text: &str) -> String {
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safe_html(&markdown_to_html(text, &Options::default()))
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}
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pub fn safe_html(text: &str) -> String {
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let mut input = BufferQueue::default();
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input.push_back(text.to_tendril().try_reinterpret().unwrap());
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let sink = Sink::default();
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let mut tok = Tokenizer::new(sink, Default::default());
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let _ = tok.feed(&mut input);
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if !input.is_empty() {
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tracing::warn!("buffer input not empty after processing html");
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}
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tok.end();
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tok.sink.buffer
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}
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