[PATCH] wget.py: parse only <a> tags

[PATCH] wget.py: parse only <a> tags

[Alexander Kanavin]

For two reasons:
1) The important one: we hit the following bug when doing upstream version checks
on some webpages:
https://bugs.launchpad.net/beautifulsoup/+bug/1471755

2) Also, documentation for beautifulsoup states that memory usage and
speed is improved that way.

Signed-off-by: Alexander Kanavin <alexander.kanavin@linux.intel.com>
---
 bitbake/lib/bb/fetch2/wget.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/bitbake/lib/bb/fetch2/wget.py b/bitbake/lib/bb/fetch2/wget.py
index bd2a897..c185f5b 100644
--- a/bitbake/lib/bb/fetch2/wget.py
+++ b/bitbake/lib/bb/fetch2/wget.py
@@ -38,6 +38,7 @@ from   bb.fetch2 import FetchError
 from   bb.fetch2 import logger
 from   bb.fetch2 import runfetchcmd
 from   bs4 import BeautifulSoup
+from   bs4 import SoupStrainer
 
 class Wget(FetchMethod):
     """Class to fetch urls via 'wget'"""
@@ -367,7 +368,7 @@ class Wget(FetchMethod):
         version = ['', '', '']
 
         bb.debug(3, "VersionURL: %s" % (url))
-        soup = BeautifulSoup(self._fetch_index(url, ud, d))
+        soup = BeautifulSoup(self._fetch_index(url, ud, d), "html.parser", parse_only=SoupStrainer("a"))
         if not soup:
             bb.debug(3, "*** %s NO SOUP" % (url))
             return ""
@@ -417,7 +418,7 @@ class Wget(FetchMethod):
                 ud.path.split(dirver)[0], ud.user, ud.pswd, {}])
         bb.debug(3, "DirURL: %s, %s" % (dirs_uri, package))
 
-        soup = BeautifulSoup(self._fetch_index(dirs_uri, ud, d))
+        soup = BeautifulSoup(self._fetch_index(dirs_uri, ud, d), "html.parser", parse_only=SoupStrainer("a"))
         if not soup:
             return version[1]
 
-- 
2.6.2