xfy
bd659c5b4f
- Add lol_html-based HTML whitespace minifier (utils/html_minify.rs) that collapses whitespace and strips comments while preserving <pre>, <code>, <textarea>, <script>, <style> content - Add Axum middleware (middleware/minify_html.rs) that minifies text/html responses with per-URL moka cache (256 entries, 300s TTL) - Wire middleware into the server router in main.rs - Add CSS minifier to generate_highlight_css build step - Apply minify_html to rendered markdown output and TOC - Add http-body-util dependency for body collection in middleware
76 lines
2.4 KiB
Rust
76 lines
2.4 KiB
Rust
//! HTML 空白压缩工具函数。
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//!
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//! 仅服务端使用。对 HTML 片段做轻量 minify：
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//! - 合并标签之间连续空白为一个空格；
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//! - 移除 HTML 注释；
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//! - 保留 `<pre>`、`<code>`、`<textarea>`、`<script>`、`<style>` 内部原样空白。
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use lol_html::{doc_comments, doc_text, element, rewrite_str, RewriteStrSettings};
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use std::cell::Cell;
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use std::rc::Rc;
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/// 压缩 HTML 中的无用空白。
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pub fn minify_html(input: &str) -> String {
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let protected_depth: Rc<Cell<usize>> = Rc::new(Cell::new(0));
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rewrite_str(
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input,
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RewriteStrSettings {
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element_content_handlers: vec![element!(
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"pre, code, textarea, script, style",
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{
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let depth = protected_depth.clone();
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move |el| {
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depth.set(depth.get() + 1);
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let depth_end = depth.clone();
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let _ = el.on_end_tag(lol_html::end_tag!(move |_end| {
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depth_end.set(depth_end.get().saturating_sub(1));
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Ok(())
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}));
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Ok(())
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}
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}
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)],
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document_content_handlers: vec![
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doc_text!({
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let depth = protected_depth.clone();
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move |text| {
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if depth.get() == 0 {
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let s = text.as_str();
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let collapsed = collapse_whitespace(s);
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if collapsed != s {
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text.set_str(collapsed);
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}
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}
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Ok(())
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}
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}),
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doc_comments!(|c| {
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c.remove();
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Ok(())
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}),
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],
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..RewriteStrSettings::default()
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},
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)
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.unwrap_or_else(|_| input.to_string())
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}
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/// 将连续空白字符合并为一个空格。
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fn collapse_whitespace(s: &str) -> String {
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let mut out = String::with_capacity(s.len());
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let mut prev_ws = false;
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for ch in s.chars() {
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if ch.is_whitespace() {
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if !prev_ws {
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out.push(' ');
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prev_ws = true;
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}
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} else {
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out.push(ch);
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prev_ws = false;
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}
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}
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out
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}
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