To ensure the file has been successfully uploaded to Dropbox, BoomBox utilizes a set of regular expression values to check the HTTP response from Dropbox. As shown below, the regular expressions are used to check the presence of the is_downloadable, path_lower, content_hash, and size fields (not their values) in the HTTP response received from Dropbox. Notably, BoomBox disregards the outcome of this check and proceeds, even if the upload operation is unsuccessful