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Diffstat (limited to 'synapse/rest/media/v1/oembed.py')
| -rw-r--r-- | synapse/rest/media/v1/oembed.py | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/synapse/rest/media/v1/oembed.py b/synapse/rest/media/v1/oembed.py index e04671fb95..6d7e1f9064 100644 --- a/synapse/rest/media/v1/oembed.py +++ b/synapse/rest/media/v1/oembed.py @@ -96,6 +96,32 @@ class OEmbedProvider: # No match. return None + def autodiscover_from_html(self, tree: "etree.Element") -> Optional[str]: + """ + Search an HTML document for oEmbed autodiscovery information. + + Args: + tree: The parsed HTML body. + + Returns: + The URL to use for oEmbed information, or None if no URL was found. + """ + # Search for link elements with the proper rel and type attributes. + for tag in tree.xpath( + "//link[@rel='alternate'][@type='application/json+oembed']" + ): + if "href" in tag.attrib: + return tag.attrib["href"] + + # Some providers (e.g. Flickr) use alternative instead of alternate. + for tag in tree.xpath( + "//link[@rel='alternative'][@type='application/json+oembed']" + ): + if "href" in tag.attrib: + return tag.attrib["href"] + + return None + def parse_oembed_response(self, url: str, raw_body: bytes) -> OEmbedResult: """ Parse the oEmbed response into an Open Graph response. |