"client_modified" was not updated after upload

[wen_hsiao]

I found that the "client_modified" of a file was not updated if the file is already exists on Dropbox.

API: https://www.dropbox.com/developers/documentation/http/documentation#files-upload

This is my test steps (using HTTP request)

1. upload a file (with client_modified)

// the client_modifed was updated

2. upload the same file (with only client_modified time changed)

// the client_modified was NOT updated

You can get the same results from API explorer
https://dropbox.github.io/dropbox-api-v2-explorer/#files_upload

[Greg-DB]

If the file contents are identical, this is the expected behavior. When the old and new file contents are exactly the same, Dropbox doesn't consider it a change and so no new metadata is written. We'll consider it a feature request for the ability to change the client_modified without changing the file data, but I can't promise if/when that might be implemented.