For static files, you could use either wget or curl in a bash script, e.g.:

#!/bin/bash
wget https://www.example.com/foo/bar.baz -O /path/to/destination/bar.baz
curl https://www.example.com/baz/foo.bar --output /path/to/destination/foo.bar
...

If it is a web form, you could emulate submitting a form with curl -F and key-value pairs representing form fields, using the URL or address of the form CGI, e.g.:

#!/bin/bash
curl -F "foo=bar;baz=foo" https://www.example.com/some_form.cgi --output /path/to/destination/some_result

You can also use wget --post-data; take a look at the man pages for the two tools.

If you put textual form data into a script, make sure its contents are percent-encoded. If you put binary data into a script, you'll need to do some other encoding, such as base64-encoding. There are numerous CLI tools to do these and other kinds of encoding.

Is this what you want? http://starbase.sysu.edu.cn/browseClipSeq.php Click "export" at the upper left corner of the table.

In miRNA-mRNA query webpage, if you do not input/select anything, you can browse and download all miRNA-mRNA interactions. You only click "export" at the upper left corner of the table and download all results.