mirror of
https://git.anonymousland.org/anonymousland/synapse.git
synced 2024-12-19 00:04:18 -05:00
fix assorted redirect, unicode and screenscraping bugs
This commit is contained in:
Matthew Hodgson
parent
683e564815
commit
c60b751694
@ -74,84 +74,93 @@ class PreviewUrlResource(BaseMediaResource):
|
||||
elif self._is_html(media_info['media_type']):
|
||||
# TODO: somehow stop a big HTML tree from exploding synapse's RAM
|
||||
|
||||
# XXX: can't work out how to make lxml ignore UTF8 decoding errors
|
||||
# so slurp as a string at this point.
|
||||
file = open(media_info['filename'])
|
||||
body = file.read()
|
||||
file.close()
|
||||
# FIXME: we shouldn't be forcing utf-8 if the page isn't actually utf-8...
|
||||
tree = html.fromstring(body.decode('utf-8','ignore'))
|
||||
# tree = html.parse(media_info['filename'])
|
||||
def _calc_og():
|
||||
# suck it up into lxml and define our OG response.
|
||||
# if we see any URLs in the OG response, then spider them
|
||||
# (although the client could choose to do this by asking for previews of those URLs to avoid DoSing the server)
|
||||
|
||||
# suck it up into lxml and define our OG response.
|
||||
# if we see any URLs in the OG response, then spider them
|
||||
# (although the client could choose to do this by asking for previews of those URLs to avoid DoSing the server)
|
||||
# "og:type" : "article"
|
||||
# "og:url" : "https://twitter.com/matrixdotorg/status/684074366691356672"
|
||||
# "og:title" : "Matrix on Twitter"
|
||||
# "og:image" : "https://pbs.twimg.com/profile_images/500400952029888512/yI0qtFi7_400x400.png"
|
||||
# "og:description" : "Synapse 0.12 is out! Lots of polishing, performance & bugfixes: /sync API, /r0 prefix, fulltext search, 3PID invites https://t.co/5alhXLLEGP"
|
||||
# "og:site_name" : "Twitter"
|
||||
|
||||
# or:
|
||||
|
||||
# "og:type" : "article"
|
||||
# "og:url" : "https://twitter.com/matrixdotorg/status/684074366691356672"
|
||||
# "og:title" : "Matrix on Twitter"
|
||||
# "og:image" : "https://pbs.twimg.com/profile_images/500400952029888512/yI0qtFi7_400x400.png"
|
||||
# "og:description" : "Synapse 0.12 is out! Lots of polishing, performance & bugfixes: /sync API, /r0 prefix, fulltext search, 3PID invites https://t.co/5alhXLLEGP"
|
||||
# "og:site_name" : "Twitter"
|
||||
|
||||
# or:
|
||||
# "og:type" : "video",
|
||||
# "og:url" : "https://www.youtube.com/watch?v=LXDBoHyjmtw",
|
||||
# "og:site_name" : "YouTube",
|
||||
# "og:video:type" : "application/x-shockwave-flash",
|
||||
# "og:description" : " ",
|
||||
# "og:title" : "RemoteJam - Matrix team hack for Disrupt Europe Hackathon",
|
||||
# "og:image" : "https://i.ytimg.com/vi/LXDBoHyjmtw/maxresdefault.jpg",
|
||||
# "og:video:url" : "http://www.youtube.com/v/LXDBoHyjmtw?version=3&autohide=1",
|
||||
# "og:video:width" : "1280"
|
||||
# "og:video:height" : "720",
|
||||
# "og:video:secure_url": "https://www.youtube.com/v/LXDBoHyjmtw?version=3&autohide=1",
|
||||
|
||||
# "og:type" : "video",
|
||||
# "og:url" : "https://www.youtube.com/watch?v=LXDBoHyjmtw",
|
||||
# "og:site_name" : "YouTube",
|
||||
# "og:video:type" : "application/x-shockwave-flash",
|
||||
# "og:description" : " ",
|
||||
# "og:title" : "RemoteJam - Matrix team hack for Disrupt Europe Hackathon",
|
||||
# "og:image" : "https://i.ytimg.com/vi/LXDBoHyjmtw/maxresdefault.jpg",
|
||||
# "og:video:url" : "http://www.youtube.com/v/LXDBoHyjmtw?version=3&autohide=1",
|
||||
# "og:video:width" : "1280"
|
||||
# "og:video:height" : "720",
|
||||
# "og:video:secure_url": "https://www.youtube.com/v/LXDBoHyjmtw?version=3&autohide=1",
|
||||
og = {}
|
||||
for tag in tree.xpath("//*/meta[starts-with(@property, 'og:')]"):
|
||||
og[tag.attrib['property']] = tag.attrib['content']
|
||||
|
||||
og = {}
|
||||
for tag in tree.xpath("//*/meta[starts-with(@property, 'og:')]"):
|
||||
og[tag.attrib['property']] = tag.attrib['content']
|
||||
if 'og:title' not in og:
|
||||
# do some basic spidering of the HTML
|
||||
title = tree.xpath("(//title)[1] | (//h1)[1] | (//h2)[1] | (//h3)[1]")
|
||||
og['og:title'] = title[0].text if title else None
|
||||
|
||||
if not og:
|
||||
# do some basic spidering of the HTML
|
||||
title = tree.xpath("(//title)[1] | (//h1)[1] | (//h2)[1] | (//h3)[1]")
|
||||
og['og:title'] = title[0].text if title else None
|
||||
|
||||
images = [ i for i in tree.xpath("//img") if 'src' in i.attrib ]
|
||||
big_images = [ i for i in images if (
|
||||
'width' in i.attrib and 'height' in i.attrib and
|
||||
i.attrib['width'] > 64 and i.attrib['height'] > 64
|
||||
)]
|
||||
big_images = big_images.sort(key=lambda i: (-1 * int(i.attrib['width']) * int(i.attrib['height'])))
|
||||
images = big_images if big_images else images
|
||||
|
||||
if images:
|
||||
base = list(urlparse(media_info['uri']))
|
||||
src = list(urlparse(images[0].attrib['src']))
|
||||
if not src[0] and not src[1]:
|
||||
src[0] = base[0]
|
||||
src[1] = base[1]
|
||||
if not src[2].startswith('/'):
|
||||
src[2] = re.sub(r'/[^/]+$', '/', base[2]) + src[2]
|
||||
og['og:image'] = urlunparse(src)
|
||||
|
||||
text_nodes = tree.xpath("//h1/text() | //h2/text() | //h3/text() | //p/text() | //div/text() | //span/text() | //a/text()")
|
||||
# text_nodes = tree.xpath("//h1/text() | //h2/text() | //h3/text() | //p/text() | //div/text()")
|
||||
text = ''
|
||||
for text_node in text_nodes:
|
||||
if len(text) < 1024:
|
||||
text += text_node + ' '
|
||||
if 'og:image' not in og:
|
||||
meta_image = tree.xpath("//*/meta[@itemprop='image']/@content");
|
||||
if meta_image:
|
||||
og['og:image'] = self._rebase_url(meta_image[0], media_info['uri'])
|
||||
else:
|
||||
break
|
||||
text = re.sub(r'[\t ]+', ' ', text)
|
||||
text = re.sub(r'[\t \r\n]*[\r\n]+', '\n', text)
|
||||
text = text.strip()[:1024]
|
||||
og['og:description'] = text if text else None
|
||||
images = [ i for i in tree.xpath("//img") if 'src' in i.attrib ]
|
||||
big_images = [ i for i in images if (
|
||||
'width' in i.attrib and 'height' in i.attrib and
|
||||
i.attrib['width'] > 64 and i.attrib['height'] > 64
|
||||
)]
|
||||
big_images = big_images.sort(key=lambda i: (-1 * int(i.attrib['width']) * int(i.attrib['height'])))
|
||||
images = big_images if big_images else images
|
||||
|
||||
if images:
|
||||
og['og:image'] = self._rebase_url(images[0].attrib['src'], media_info['uri'])
|
||||
|
||||
if 'og:description' not in og:
|
||||
meta_description = tree.xpath("//*/meta[@name='description']/@content");
|
||||
if meta_description:
|
||||
og['og:description'] = meta_description[0]
|
||||
else:
|
||||
text_nodes = tree.xpath("//h1/text() | //h2/text() | //h3/text() | //p/text() | //div/text() | //span/text() | //a/text()")
|
||||
# text_nodes = tree.xpath("//h1/text() | //h2/text() | //h3/text() | //p/text() | //div/text()")
|
||||
text = ''
|
||||
for text_node in text_nodes:
|
||||
if len(text) < 500:
|
||||
text += text_node + ' '
|
||||
else:
|
||||
break
|
||||
text = re.sub(r'[\t ]+', ' ', text)
|
||||
text = re.sub(r'[\t \r\n]*[\r\n]+', '\n', text)
|
||||
text = text.strip()[:500]
|
||||
og['og:description'] = text if text else None
|
||||
|
||||
# TODO: extract a favicon?
|
||||
# TODO: turn any OG media URLs into mxc URLs to capture and thumbnail them too
|
||||
# TODO: store our OG details in a cache (and expire them when stale)
|
||||
# TODO: delete the content to stop diskfilling, as we only ever cared about its OG
|
||||
return og
|
||||
|
||||
try:
|
||||
tree = html.parse(media_info['filename'])
|
||||
og = _calc_og()
|
||||
except UnicodeDecodeError:
|
||||
# XXX: evil evil bodge
|
||||
file = open(media_info['filename'])
|
||||
body = file.read()
|
||||
file.close()
|
||||
tree = html.fromstring(body.decode('utf-8','ignore'))
|
||||
og = _calc_og()
|
||||
|
||||
# TODO: extract a favicon?
|
||||
# TODO: turn any OG media URLs into mxc URLs to capture and thumbnail them too
|
||||
# TODO: store our OG details in a cache (and expire them when stale)
|
||||
# TODO: delete the content to stop diskfilling, as we only ever cared about its OG
|
||||
else:
|
||||
logger.warn("Failed to find any OG data in %s", url)
|
||||
og = {}
|
||||
@ -173,6 +182,15 @@ class PreviewUrlResource(BaseMediaResource):
|
||||
)
|
||||
raise
|
||||
|
||||
def _rebase_url(self, url, base):
|
||||
base = list(urlparse(base))
|
||||
url = list(urlparse(url))
|
||||
if not url[0] and not url[1]:
|
||||
url[0] = base[0]
|
||||
url[1] = base[1]
|
||||
if not url[2].startswith('/'):
|
||||
url[2] = re.sub(r'/[^/]+$', '/', base[2]) + url[2]
|
||||
return urlunparse(url)
|
||||
|
||||
@defer.inlineCallbacks
|
||||
def _download_url(self, url, user):
|
||||
@ -223,7 +241,7 @@ class PreviewUrlResource(BaseMediaResource):
|
||||
download_name = None
|
||||
|
||||
yield self.store.store_local_media(
|
||||
media_id=fname,
|
||||
media_id=file_id,
|
||||
media_type=media_type,
|
||||
time_now_ms=self.clock.time_msec(),
|
||||
upload_name=download_name,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user