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fallback untouched html if we can not parse html tree

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This commit is contained in:
Sergey Obukhov
2016-08-19 11:38:12 -07:00
parent 5b1ca33c57
commit 37c95ff97b
4 changed files with 45 additions and 3 deletions
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4
talon/quotations.py
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@@ -394,6 +394,10 @@ def _extract_from_html(msg_body):
msg_body = msg_body.replace(b'\r\n', b'\n')
html_tree = html_document_fromstring(msg_body)
if html_tree is None:
return msg_body
cut_quotations = (html_quotations.cut_gmail_quote(html_tree) or
html_quotations.cut_zimbra_quote(html_tree) or
html_quotations.cut_blockquote(html_tree) or

15
talon/utils.py
View File

@@ -159,6 +159,7 @@ def html_to_text(string):
NOTES:
1. the string is expected to contain UTF-8 encoded HTML!
2. returns utf-8 encoded str (not unicode)
3. if html can't be parsed returns None
"""
if isinstance(string, six.text_type):
string = string.encode('utf8')
@@ -166,15 +167,29 @@ def html_to_text(string):
s = _prepend_utf8_declaration(string)
s = s.replace(b"\n", b"")
tree = html_fromstring(s)
if tree is None:
return None
return html_tree_to_text(tree)
def html_fromstring(s):
"""Parse html tree from string. Return None if the string can't be parsed.
"""
try:
return html5parser.fromstring(s, parser=_HTML5LIB_PARSER)
except Exception:
pass
def html_document_fromstring(s):
"""Parse html tree from string. Return None if the string can't be parsed.
"""
try:
return html5parser.document_fromstring(s, parser=_HTML5LIB_PARSER)
except Exception:
pass
def cssselect(expr, tree):

6
tests/html_quotations_test.py
View File

@@ -413,3 +413,9 @@ def test_readable_html_empty():
eq_(RE_WHITESPACE.sub('', msg_body),
RE_WHITESPACE.sub('', quotations.extract_from_html(msg_body)))
@patch.object(quotations, 'html_document_fromstring', Mock(return_value=None))
def test_bad_html():
bad_html = "<html></html>"
eq_(bad_html, quotations.extract_from_html(bad_html))

19
tests/utils_test.py
View File

@@ -112,5 +112,22 @@ font: 13px 'Lucida Grande', Arial, sans-serif;
def test_comment_no_parent():
s = "<!-- COMMENT 1 --> no comment"
d = html.document_fromstring(s)
d = u.html_document_fromstring(s)
eq_("no comment", u.html_tree_to_text(d))
@patch.object(u.html5parser, 'fromstring', Mock(side_effect=Exception()))
def test_html_fromstring_exception():
eq_(None, u.html_fromstring("<html></html>"))
@patch.object(u.html5parser, 'document_fromstring')
def test_html_document_fromstring_exception(document_fromstring):
document_fromstring.side_effect = Exception()
eq_(None, u.html_document_fromstring("<html></html>"))
@patch.object(u, 'html_fromstring', Mock(return_value=None))
def test_bad_html_to_text():
bad_html = "one<br>two<br>three"
eq_(None, u.html_to_text(bad_html))