fix bindings: java, nodejs, python

bindings/java/src/async_operator.rs

@@ -139,7 +139,7 @@ fn intern_write(
 }
 
 async fn do_write(op: &mut Operator, path: String, content: Vec<u8>) -> Result<()> {
-    Ok(op.write(&path, content).await?)
+    Ok(op.write(&path, content).await.map(|_| ())?)
 }
 
 /// # Safety
@@ -182,7 +182,11 @@ fn intern_append(
 }
 
 async fn do_append(op: &mut Operator, path: String, content: Vec<u8>) -> Result<()> {
-    Ok(op.write_with(&path, content).append(true).await?)
+    Ok(op
+        .write_with(&path, content)
+        .append(true)
+        .await
+        .map(|_| ())?)
 }
 
 /// # Safety

bindings/java/src/operator.rs

@@ -104,7 +104,7 @@ fn intern_write(
 ) -> Result<()> {
     let path = jstring_to_string(env, &path)?;
     let content = env.convert_byte_array(content)?;
-    Ok(op.write(&path, content)?)
+    Ok(op.write(&path, content).map(|_| ())?)
 }
 
 /// # Safety

bindings/nodejs/src/lib.rs

@@ -269,7 +269,7 @@ impl Operator {
                 writer = writer.cache_control(cache_control);
             }
         }
-        writer.await.map_err(format_napi_error)
+        writer.await.map(|_| ()).map_err(format_napi_error)
     }
 
     //noinspection DuplicatedCode
@@ -371,7 +371,7 @@ impl Operator {
                 writer = writer.cache_control(cache_control);
             }
         }
-        writer.call().map_err(format_napi_error)
+        writer.call().map(|_| ()).map_err(format_napi_error)
     }
 
     /// Copy file according to given `from` and `to` path.
@@ -809,7 +809,7 @@ impl BlockingWriter {
     /// ```
     #[napi]
     pub unsafe fn close(&mut self) -> Result<()> {
-        self.0.close().map_err(format_napi_error)
+        self.0.close().map(|_| ()).map_err(format_napi_error)
     }
 }
 
@@ -855,7 +855,7 @@ impl Writer {
     /// ```
     #[napi]
     pub async unsafe fn close(&mut self) -> Result<()> {
-        self.0.close().await.map_err(format_napi_error)
+        self.0.close().await.map(|_| ()).map_err(format_napi_error)
     }
 }
 

bindings/python/src/operator.rs

@@ -135,7 +135,7 @@ impl Operator {
             write = write.cache_control(cache_control);
         }
 
-        write.call().map_err(format_pyerr)
+        write.call().map(|_| ()).map_err(format_pyerr)
     }
 
     /// Get current path's metadata **without cache** directly.
@@ -351,7 +351,7 @@ impl AsyncOperator {
             if let Some(cache_control) = &kwargs.cache_control {
                 write = write.cache_control(cache_control);
             }
-            write.await.map_err(format_pyerr)
+            write.await.map(|_| ()).map_err(format_pyerr)
         })
     }