pitrou commented on code in PR #41564:
URL: https://github.com/apache/arrow/pull/41564#discussion_r1603526713


##########
cpp/src/arrow/filesystem/s3fs.cc:
##########
@@ -1838,9 +1952,114 @@ class ObjectOutputStream final : public 
io::OutputStream {
     return Status::OK();
   }
 
-  static void HandleUploadOutcome(const std::shared_ptr<UploadState>& state,
-                                  int part_number, const 
S3Model::UploadPartRequest& req,
-                                  const Result<S3Model::UploadPartOutcome>& 
result) {
+  static Status UploadError(const Aws::S3::Model::PutObjectRequest& request,
+                            const Aws::S3::Model::PutObjectOutcome& outcome) {
+    return ErrorToStatus(
+        std::forward_as_tuple("When uploading object with key '", 
request.GetKey(),
+                              "' in bucket '", request.GetBucket(), "': "),
+        "PutObject", outcome.GetError());
+  }
+
+  Status UploadUsingSingleRequest(std::shared_ptr<Buffer> buffer) {
+    return UploadUsingSingleRequest(buffer->data(), buffer->size(), buffer);
+  }
+
+  Status UploadUsingSingleRequest(const void* data, int64_t nbytes,
+                                  std::shared_ptr<Buffer> owned_buffer = 
nullptr) {
+    auto sync_result_callback = [](const Aws::S3::Model::PutObjectRequest& 
request,
+                                   std::shared_ptr<UploadState> state,
+                                   int32_t part_number,
+                                   Aws::S3::Model::PutObjectOutcome outcome) {
+      if (!outcome.IsSuccess()) {
+        return UploadError(request, outcome);
+      }
+      return Status::OK();
+    };
+
+    auto async_result_callback = [](const Aws::S3::Model::PutObjectRequest& 
request,
+                                    std::shared_ptr<UploadState> state,
+                                    int32_t part_number,
+                                    Aws::S3::Model::PutObjectOutcome outcome) {
+      HandleUploadUsingSingleRequestOutcome(state, request, 
outcome.GetResult());
+      return Status::OK();
+    };
+
+    Aws::S3::Model::PutObjectRequest req{};
+    RETURN_NOT_OK(SetMetadataInRequest(&req));
+
+    return Upload<Aws::S3::Model::PutObjectRequest, 
Aws::S3::Model::PutObjectOutcome>(
+        std::move(req), sync_result_callback, async_result_callback, data, 
nbytes,
+        owned_buffer);

Review Comment:
   Nits: move more arguments
   ```suggestion
       return Upload<Aws::S3::Model::PutObjectRequest, 
Aws::S3::Model::PutObjectOutcome>(
           std::move(req), std::move(sync_result_callback), 
std::move(async_result_callback),
           data, nbytes, std::move(owned_buffer));
   ```



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