feat(core): support content_language in opendal::metadata and opendal:capability

core/src/lib.rs

@@ -181,8 +181,8 @@ mod tests {
     #[test]
     fn assert_size() {
         assert_eq!(16, size_of::<Operator>());
-        assert_eq!(320, size_of::<Entry>());
-        assert_eq!(296, size_of::<Metadata>());
+        assert_eq!(344, size_of::<Entry>());
+        assert_eq!(320, size_of::<Metadata>());
         assert_eq!(1, size_of::<EntryMode>());
         assert_eq!(24, size_of::<Scheme>());
     }

core/src/types/capability.rs

@@ -116,6 +116,8 @@ pub struct Capability {
     pub write_with_content_disposition: bool,
     /// Indicates if Content-Encoding can be specified during write operations.
     pub write_with_content_encoding: bool,
+    /// Indicates if Content-Language can be specified during write operations.
+    pub write_with_content_language: bool,
     /// Indicates if Cache-Control can be specified during write operations.
     pub write_with_cache_control: bool,
     /// Indicates if conditional write operations using If-Match are supported.

core/src/types/metadata.rs

@@ -61,6 +61,7 @@ pub struct Metadata {
     content_range: Option<BytesContentRange>,
     content_type: Option<String>,
     content_encoding: Option<String>,
+    content_language: Option<String>,
     etag: Option<String>,
     last_modified: Option<DateTime<Utc>>,
     version: Option<String>,
@@ -82,6 +83,7 @@ impl Metadata {
             content_md5: None,
             content_type: None,
             content_encoding: None,
+            content_language: None,
             content_range: None,
             last_modified: None,
             etag: None,
@@ -295,6 +297,21 @@ impl Metadata {
         self
     }
 
+    /// Content Language of this entry.
+    ///
+    /// Content Language is defined by [RFC 7231](https://httpwg.org/specs/rfc7231.html#header.content-language)
+    ///
+    /// Refer to [MDN Content-Language](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Language) for more information.
+    pub fn content_language(&self) -> Option<&str> {
+        self.content_language.as_deref()
+    }
+
+    /// Set Content Language of this entry.
+    pub fn set_content_language(&mut self, v: &str) -> &mut Self {
+        self.content_language = Some(v.to_string());
+        self
+    }
+
     /// Content Range of this entry.
     ///
     /// Content Range is defined by [RFC 9110](https://httpwg.org/specs/rfc9110.html#field.content-range).

core/src/types/options.rs

@@ -397,6 +397,7 @@ pub struct WriteOptions {
     ///
     /// This operation allows specifying the encoding applied to the content being written.
     pub content_encoding: Option<String>,
+
     /// Sets user metadata for this write request.
     ///
     /// ### Capability