Update the URL of the SOFA tarball

sofa_deriver.py

@@ -382,7 +382,7 @@ def download_sofa(url=None, dlloc='.', verbose=True):
     from six.moves.urllib.request import urlretrieve
 
     if url is None:
-        url = _find_sofa_url_on_web_page()
+        url = "https://www.iausofa.org/s/sofa_c-20231011tar.gz"
 
     fn = url.split('/')[-1]
     if not os.path.isdir(dlloc):
@@ -396,41 +396,6 @@ def download_sofa(url=None, dlloc='.', verbose=True):
     return retfn
 
 
-def _find_sofa_url_on_web_page(url='http://www.iausofa.org/current_C.html'):
-    """
-    Finds and returns the download URL for the latest C SOFA.
-    """
-    from urllib.request import urlopen
-    from html.parser import HTMLParser
-
-    # Create a subclass to override the handler methods.
-    class SOFAParser(HTMLParser):
-        def __init__(self):
-            self.matched_urls = []
-            super().__init__()
-
-        def handle_starttag(self, tag, attrs):
-            if tag == 'a' and attrs[-1][-1].endswith('.tar.gz'):
-                self.matched_urls.append(attrs[-1][-1])
-
-    parser = SOFAParser()
-    u = urlopen(url)
-    try:
-        for ln in u:
-            parser.feed(ln.decode())
-    finally:
-        u.close()
-
-    baseurl = '/'.join(url.split('/')[:-1])
-    fullurls = [(baseurl + m) for m in parser.matched_urls]
-
-    if len(fullurls) != 1:
-        raise ValueError('Found *multiple* possible downloads: ' +
-                         str(fullurls))
-
-    return fullurls[0]
-
-
 if __name__ == '__main__':
     import glob
     import tarfile