refactor: remove unnecessarily wrap value into a Result

this simplify code and remove some unwrap.
warning: this function's return value is unnecessarily wrapped by `Result`
help: for further information visit https://rust-lang.github.io/rust-clippy/rust-1.93.0/index.html#unnecessary_wraps

src/api/s3/get.rs

@@ -126,7 +126,7 @@ fn handle_http_precondition(
 ) -> Result<Option<Response<ResBody>>, Error> {
 	let precondition_headers = PreconditionHeaders::parse(req)?;
 
-	if let Some(status_code) = precondition_headers.check(version, &version_meta.etag)? {
+	if let Some(status_code) = precondition_headers.check(version, &version_meta.etag) {
 		let mut response = object_headers(
 			version,
 			version_meta,
@@ -877,7 +877,7 @@ impl PreconditionHeaders {
 		})
 	}
 
-	fn check(&self, v: &ObjectVersion, etag: &str) -> Result<Option<StatusCode>, Error> {
+	fn check(&self, v: &ObjectVersion, etag: &str) -> Option<StatusCode> {
 		// we store date with ms precision, but headers are precise to the second: truncate
 		// the timestamp to handle the same-second edge case
 		let v_date = UNIX_EPOCH + Duration::from_secs(v.timestamp / 1000);
@@ -887,32 +887,32 @@ impl PreconditionHeaders {
 		if let Some(im) = &self.if_match {
 			// Step 1: if-match is present
 			if !im.iter().any(|x| x == etag || x == "*") {
-				return Ok(Some(StatusCode::PRECONDITION_FAILED));
+				return Some(StatusCode::PRECONDITION_FAILED);
 			}
 		} else if let Some(ius) = &self.if_unmodified_since {
 			// Step 2: if-unmodified-since is present, and if-match is absent
 			if v_date > *ius {
-				return Ok(Some(StatusCode::PRECONDITION_FAILED));
+				return Some(StatusCode::PRECONDITION_FAILED);
 			}
 		}
 
 		if let Some(inm) = &self.if_none_match {
 			// Step 3: if-none-match is present
 			if inm.iter().any(|x| x == etag || x == "*") {
-				return Ok(Some(StatusCode::NOT_MODIFIED));
+				return Some(StatusCode::NOT_MODIFIED);
 			}
 		} else if let Some(ims) = &self.if_modified_since {
 			// Step 4: if-modified-since is present, and if-none-match is absent
 			if v_date <= *ims {
-				return Ok(Some(StatusCode::NOT_MODIFIED));
+				return Some(StatusCode::NOT_MODIFIED);
 			}
 		}
 
-		Ok(None)
+		None
 	}
 
 	pub(crate) fn check_copy_source(&self, v: &ObjectVersion, etag: &str) -> Result<(), Error> {
-		match self.check(v, etag)? {
+		match self.check(v, etag) {
 			Some(_) => Err(Error::PreconditionFailed),
 			None => Ok(()),
 		}

src/api/s3/list.rs

@@ -296,7 +296,7 @@ pub async fn handle_list_parts(
 		},
 	);
 
-	let (info, next) = fetch_part_info(query, &mpu)?;
+	let (info, next) = fetch_part_info(query, &mpu);
 
 	let result = s3_xml::ListPartsResult {
 		xmlns: (),
@@ -526,7 +526,7 @@ where
 fn fetch_part_info<'a>(
 	query: &ListPartsQuery,
 	mpu: &'a MultipartUpload,
-) -> Result<(Vec<PartInfo<'a>>, Option<u64>), Error> {
+) -> (Vec<PartInfo<'a>>, Option<u64>) {
 	assert!((1..=1000).contains(&query.max_parts)); // see s3/api_server.rs
 
 	// Parse multipart upload part list, removing parts not yet finished
@@ -565,10 +565,10 @@ fn fetch_part_info<'a>(
 	if parts.len() > query.max_parts as usize {
 		parts.truncate(query.max_parts as usize);
 		let pagination = Some(parts.last().unwrap().part_number);
-		return Ok((parts, pagination));
+		return (parts, pagination);
 	}
 
-	Ok((parts, None))
+	(parts, None)
 }
 
 /*
@@ -1255,7 +1255,7 @@ mod tests {
 	}
 
 	#[test]
-	fn test_fetch_part_info() -> Result<(), Error> {
+	fn test_fetch_part_info() {
 		let mut query = ListPartsQuery {
 			bucket_name: "a".to_string(),
 			key: "a".to_string(),
@@ -1267,7 +1267,7 @@ mod tests {
 		let mpu = mpu();
 
 		// Start from the beginning but with limited size to trigger pagination
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert_eq!(pagination.unwrap(), 3);
 		assert_eq!(
 			info,
@@ -1291,7 +1291,7 @@ mod tests {
 
 		// Use previous pagination to make a new request
 		query.part_number_marker = Some(pagination.unwrap());
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert!(pagination.is_none());
 		assert_eq!(
 			info,
@@ -1315,14 +1315,14 @@ mod tests {
 
 		// Trying to access a part that is way larger than registered ones
 		query.part_number_marker = Some(9999);
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert!(pagination.is_none());
 		assert_eq!(info, vec![]);
 
 		// Try without any limitation
 		query.max_parts = 1000;
 		query.part_number_marker = None;
-		let (info, pagination) = fetch_part_info(&query, &mpu)?;
+		let (info, pagination) = fetch_part_info(&query, &mpu);
 		assert!(pagination.is_none());
 		assert_eq!(
 			info,
@@ -1357,7 +1357,5 @@ mod tests {
 				},
 			]
 		);
-
-		Ok(())
 	}
 }