how to return any file present in directory as a part of curl GET call

Question

I am using tornado framework and trying implementing static file download functionality (I know we can use like below by specifying static_url_prefix so It will create handler and whenever we will use curl -0 -o nzcli -k https://127.0.0.1:8443/v2/download/testdata then It'll download testdata from where I am running script).

        self.application = tornado.web.Application( self.url_all,
                                      static_url_prefix=f"/{version}/download/",
                                      static_path=str(static_path),  )

But above implementation does not required username and password so I have decided to create separate handler for this like below.

@class_logger
class Static_file(AuthHandler):
    URL_PATTERN = r"/(v\d+)/download_handler/([A-Za-z0-9_.]+)"

    def do_get(self,ver,file_passed):
     
        try:
            print("^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^")
            static_path= pathlib.Path(pkg_resources.resource_filename("folder.app.data", "web"))  
            files = [ f for f in os.listdir(static_path) if os.path.isfile(os.path.join(static_path,f)) ]  
            print("All files in dir2 : ", files)      
            
            if file_passed in files:
               pass //return file(It can be of any extension) to enter user(show progress in terminal)
            else:
                pass
            
            status="File Downloading Completed." 
           
            return HTTPResponse(200, 'OK',status)
        
        except Exception as exp:
            status_code = 500
            return HTTPResponse(status_code, str(exp),500)

Now My requirement is that whenever user send GET request that is

`curl -k -X GET  https://127.0.0.1:PORT/v2/download_handler/testdata -H "Authorization:`cat /ips/abc/token`" -H "Content-Type: application/json"

with filename so that filename I will check if file_passed in files: but how to download file and show progress to the user from where he is running script.

any suggestions/solution would be highly appreciated. Thanks.