Validate returned disc/edit/changes pages before writing to file

[Deterous]

Some reasonable validation of the HTML to check that the disc/edit/changes pages are not empty (e.g. check that the title tag exists and is not empty)

[Deterous]

Disc page is currently validated by checking existence of Date Added field.

Edit page is not currently validated, it could be done by checking any field that exists for all systems/disc types. Preferably something later in the page in case of half-transferred files. So,
<th>Status</th>
or
<tr id="tr_d_status">

Changes page is not currently validated, it could be done by checking for this string:
<ul class="changes">
or if you don't like that, then
<dt>Date:</dt>