Stranger6667 · Stranger6667 · Jan 1, 2024
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Added
 
 - A way to customize resolving remote stylesheets.
+- Non-blocking stylesheet resolving by default.
 
 ### Changed
 

diff --git a/README.md b/README.md
@@ -70,8 +70,21 @@ const HTML: &str = r#"<html>
 </body>
 </html>"#;
 
+#[tokio::main]
+async fn main() -> css_inline::Result<()> {
+    let inlined = css_inline::inline(HTML).await?;
+    // Do something with inlined HTML, e.g. send an email
+    Ok(())
+}
+```
+
+There is also a "blocking" API for inlining:
+
+```rust
+const HTML: &str = "...";
+
 fn main() -> css_inline::Result<()> {
-    let inlined = css_inline::inline(HTML)?;
+    let inlined = css_inline::blocking::inline(HTML)?;
     // Do something with inlined HTML, e.g. send an email
     Ok(())
 }
@@ -84,11 +97,12 @@ fn main() -> css_inline::Result<()> {
 ```rust
 const HTML: &str = "...";
 
-fn main() -> css_inline::Result<()> {
+#[tokio::main]
+async fn main() -> css_inline::Result<()> {
     let inliner = css_inline::CSSInliner::options()
         .load_remote_stylesheets(false)
         .build();
-    let inlined = inliner.inline(HTML)?;
+    let inlined = inliner.inline(HTML).await?;
     // Do something with inlined HTML, e.g. send an email
     Ok(())
 }
@@ -131,12 +145,28 @@ If you'd like to load stylesheets from your filesystem, use the `file://` scheme
 ```rust
 const HTML: &str = "...";
 
-fn main() -> css_inline::Result<()> {
+#[tokio::main]
+async fn main() -> css_inline::Result<()> {
     let base_url = css_inline::Url::parse("file://styles/email/").expect("Invalid URL");
     let inliner = css_inline::CSSInliner::options()
         .base_url(Some(base_url))
         .build();
-    let inlined = inliner.inline(HTML);
+    let inlined = inliner.inline(HTML).await?;
+    // Do something with inlined HTML, e.g. send an email
+    Ok(())
+}
+```
+
+The blocking version is available as well:
+
+```rust
+const HTML: &str = "...";
+
+fn main() -> css_inline::Result<()> {
+    let inliner = css_inline::blocking::CSSInliner::options()
+        .load_remote_stylesheets(false)
+        .build();
+    let inlined = inliner.inline(HTML)?;
     // Do something with inlined HTML, e.g. send an email
     Ok(())
 }
@@ -149,7 +179,7 @@ For resolving remote stylesheets it is possible to implement a custom resolver:
 pub struct CustomStylesheetResolver;
 
 impl css_inline::StylesheetResolver for CustomStylesheetResolver {
-    fn retrieve(&self, location: &str) -> css_inline::Result<String> {
+    fn retrieve_blocking(&self, location: &str) -> css_inline::Result<String> {
         Err(self.unsupported("External stylesheets are not supported"))
     }
 }

diff --git a/bindings/c/Cargo.toml b/bindings/c/Cargo.toml
@@ -18,4 +18,4 @@ cbindgen = "0.26"
 path = "../../css-inline"
 version = "*"
 default-features = false
-features = ["http", "file"]
+features = ["http-blocking", "file"]
diff --git a/bindings/c/src/lib.rs b/bindings/c/src/lib.rs
@@ -1,4 +1,7 @@
-use css_inline::{CSSInliner, DefaultStylesheetResolver, InlineError, InlineOptions, Url};
+use css_inline::{
+    blocking::{CSSInliner, InlineOptions},
+    DefaultStylesheetResolver, InlineError, Url,
+};
 use libc::{c_char, size_t};
 use std::{borrow::Cow, cmp, ffi::CStr, io::Write, ptr, sync::Arc};
 

diff --git a/bindings/javascript/Cargo.toml b/bindings/javascript/Cargo.toml
@@ -32,7 +32,7 @@ serde = { version = "1", features = ["derive"], default-features = false }
 path = "../../css-inline"
 version = "*"
 default-features = false
-features = ["http", "file"]
+features = ["http-blocking", "file"]
 
 [target.'cfg(target_arch = "wasm32")'.dependencies.css-inline]
 path = "../../css-inline"

diff --git a/bindings/javascript/src/lib.rs b/bindings/javascript/src/lib.rs
@@ -60,6 +60,6 @@ export function inline(html: string, options?: InlineOptions): string;
 export function version(): string;"#;
 
 fn inline_inner(html: String, options: Options) -> std::result::Result<String, errors::JsError> {
-    let inliner = css_inline::CSSInliner::new(options.try_into()?);
+    let inliner = css_inline::blocking::CSSInliner::new(options.try_into()?);
     Ok(inliner.inline(&html).map_err(errors::InlineError)?)
 }
diff --git a/bindings/javascript/src/options.rs b/bindings/javascript/src/options.rs
@@ -42,11 +42,11 @@ pub struct Options {
     pub preallocate_node_capacity: Option<u32>,
 }
 
-impl TryFrom<Options> for css_inline::InlineOptions<'_> {
+impl TryFrom<Options> for css_inline::blocking::InlineOptions<'_> {
     type Error = JsError;
 
     fn try_from(value: Options) -> std::result::Result<Self, Self::Error> {
-        Ok(css_inline::InlineOptions {
+        Ok(css_inline::blocking::InlineOptions {
             inline_style_tags: value.inline_style_tags.unwrap_or(true),
             keep_style_tags: value.keep_style_tags.unwrap_or(false),
             keep_link_tags: value.keep_link_tags.unwrap_or(false),
@@ -75,7 +75,7 @@ impl TryFrom<Options> for css_inline::InlineOptions<'_> {
                     pub struct UnsupportedResolver;
 
                     impl css_inline::StylesheetResolver for UnsupportedResolver {
-                        fn retrieve(&self, location: &str) -> css_inline::Result<String> {
+                        fn retrieve_blocking(&self, location: &str) -> css_inline::Result<String> {
                             let message = if location.starts_with("https")
                                 | location.starts_with("http")
                             {

diff --git a/bindings/javascript/wasm/index.js b/bindings/javascript/wasm/index.js
@@ -33,6 +33,18 @@ heap.push(void 0, null, true, false);
 function getObject(idx) {
   return heap[idx];
 }
+var heap_next = heap.length;
+function dropObject(idx) {
+  if (idx < 132)
+    return;
+  heap[idx] = heap_next;
+  heap_next = idx;
+}
+function takeObject(idx) {
+  const ret = getObject(idx);
+  dropObject(idx);
+  return ret;
+}
 var WASM_VECTOR_LEN = 0;
 var cachedUint8Memory0 = null;
 function getUint8Memory0() {
@@ -104,7 +116,6 @@ function getStringFromWasm0(ptr, len) {
   ptr = ptr >>> 0;
   return cachedTextDecoder.decode(getUint8Memory0().subarray(ptr, ptr + len));
 }
-var heap_next = heap.length;
 function addHeapObject(obj) {
   if (heap_next === heap.length)
     heap.push(heap.length + 1);
@@ -113,17 +124,6 @@ function addHeapObject(obj) {
   heap[idx] = obj;
   return idx;
 }
-function dropObject(idx) {
-  if (idx < 132)
-    return;
-  heap[idx] = heap_next;
-  heap_next = idx;
-}
-function takeObject(idx) {
-  const ret = getObject(idx);
-  dropObject(idx);
-  return ret;
-}
 var cachedFloat64Memory0 = null;
 function getFloat64Memory0() {
   if (cachedFloat64Memory0 === null || cachedFloat64Memory0.byteLength === 0) {
@@ -261,6 +261,9 @@ function __wbg_get_imports() {
     const ret = getObject(arg0) === void 0;
     return ret;
   };
+  imports.wbg.__wbindgen_object_drop_ref = function(arg0) {
+    takeObject(arg0);
+  };
   imports.wbg.__wbindgen_string_get = function(arg0, arg1) {
     const obj = getObject(arg1);
     const ret = typeof obj === "string" ? obj : void 0;
@@ -303,9 +306,6 @@ function __wbg_get_imports() {
     const ret = +getObject(arg0);
     return ret;
   };
-  imports.wbg.__wbindgen_object_drop_ref = function(arg0) {
-    takeObject(arg0);
-  };
   imports.wbg.__wbg_length_1d25fa9e4ac21ce7 = function(arg0) {
     const ret = getObject(arg0).length;
     return ret;

diff --git a/bindings/javascript/wasm/index.min.js b/bindings/javascript/wasm/index.min.js