diff options
Diffstat (limited to 'synapse/rest/media/v1/oembed.py')
| -rw-r--r-- | synapse/rest/media/v1/oembed.py | 107 |
1 files changed, 57 insertions, 50 deletions
diff --git a/synapse/rest/media/v1/oembed.py b/synapse/rest/media/v1/oembed.py index 2177b46c9e..827afd868d 100644 --- a/synapse/rest/media/v1/oembed.py +++ b/synapse/rest/media/v1/oembed.py @@ -139,65 +139,72 @@ class OEmbedProvider: try: # oEmbed responses *must* be UTF-8 according to the spec. oembed = json_decoder.decode(raw_body.decode("utf-8")) + except ValueError: + return OEmbedResult({}, None, None) - # The version is a required string field, but not always provided, - # or sometimes provided as a float. Be lenient. - oembed_version = oembed.get("version", "1.0") - if oembed_version != "1.0" and oembed_version != 1: - raise RuntimeError(f"Invalid oEmbed version: {oembed_version}") + # The version is a required string field, but not always provided, + # or sometimes provided as a float. Be lenient. + oembed_version = oembed.get("version", "1.0") + if oembed_version != "1.0" and oembed_version != 1: + return OEmbedResult({}, None, None) - # Ensure the cache age is None or an int. - cache_age = oembed.get("cache_age") - if cache_age: - cache_age = int(cache_age) * 1000 - - # The results. - open_graph_response = { - "og:url": url, - } - - title = oembed.get("title") - if title: - open_graph_response["og:title"] = title - - author_name = oembed.get("author_name") + # Attempt to parse the cache age, if possible. + try: + cache_age = int(oembed.get("cache_age")) * 1000 + except (TypeError, ValueError): + # If the cache age cannot be parsed (e.g. wrong type or invalid + # string), ignore it. + cache_age = None - # Use the provider name and as the site. - provider_name = oembed.get("provider_name") - if provider_name: - open_graph_response["og:site_name"] = provider_name + # The oEmbed response converted to Open Graph. + open_graph_response: JsonDict = {"og:url": url} - # If a thumbnail exists, use it. Note that dimensions will be calculated later. - if "thumbnail_url" in oembed: - open_graph_response["og:image"] = oembed["thumbnail_url"] + title = oembed.get("title") + if title and isinstance(title, str): + open_graph_response["og:title"] = title - # Process each type separately. - oembed_type = oembed["type"] - if oembed_type == "rich": - calc_description_and_urls(open_graph_response, oembed["html"]) - - elif oembed_type == "photo": - # If this is a photo, use the full image, not the thumbnail. - open_graph_response["og:image"] = oembed["url"] + author_name = oembed.get("author_name") + if not isinstance(author_name, str): + author_name = None - elif oembed_type == "video": - open_graph_response["og:type"] = "video.other" + # Use the provider name and as the site. + provider_name = oembed.get("provider_name") + if provider_name and isinstance(provider_name, str): + open_graph_response["og:site_name"] = provider_name + + # If a thumbnail exists, use it. Note that dimensions will be calculated later. + thumbnail_url = oembed.get("thumbnail_url") + if thumbnail_url and isinstance(thumbnail_url, str): + open_graph_response["og:image"] = thumbnail_url + + # Process each type separately. + oembed_type = oembed.get("type") + if oembed_type == "rich": + html = oembed.get("html") + if isinstance(html, str): + calc_description_and_urls(open_graph_response, html) + + elif oembed_type == "photo": + # If this is a photo, use the full image, not the thumbnail. + url = oembed.get("url") + if url and isinstance(url, str): + open_graph_response["og:image"] = url + + elif oembed_type == "video": + open_graph_response["og:type"] = "video.other" + html = oembed.get("html") + if html and isinstance(html, str): calc_description_and_urls(open_graph_response, oembed["html"]) - open_graph_response["og:video:width"] = oembed["width"] - open_graph_response["og:video:height"] = oembed["height"] - - elif oembed_type == "link": - open_graph_response["og:type"] = "website" + for size in ("width", "height"): + val = oembed.get(size) + if val is not None and isinstance(val, int): + open_graph_response[f"og:video:{size}"] = val - else: - raise RuntimeError(f"Unknown oEmbed type: {oembed_type}") + elif oembed_type == "link": + open_graph_response["og:type"] = "website" - except Exception as e: - # Trap any exception and let the code follow as usual. - logger.warning("Error parsing oEmbed metadata from %s: %r", url, e) - open_graph_response = {} - author_name = None - cache_age = None + else: + logger.warning("Unknown oEmbed type: %s", oembed_type) return OEmbedResult(open_graph_response, author_name, cache_age) |