* SECURITY: Update default allowed iframes list
Change the default iframe url list to all include 3 slashes.
* SECURITY: limit group tag's name length
Limit the size of a group tag's name to 100 characters.
Internal ref - t/130059
* SECURITY: Improve sanitization of SVGs in Onebox
---------
Co-authored-by: Blake Erickson <o.blakeerickson@gmail.com>
Co-authored-by: Régis Hanol <regis@hanol.fr>
Co-authored-by: David Taylor <david@taylorhq.com>
Previously, we couldn't change the user agent name dynamically for onebox requests. In this commit, a new hidden site setting `onebox_user_agent` is created to override the default user agent value specified in the [initializer](c333e9d6e6/config/initializers/100-onebox_options.rb (L15)).
Co-authored-by: Régis Hanol <regis@hanol.fr>
Followup 560e8aff75
The linked commit allowed oneboxing private GitHub PRs,
issues, commits, and so on, but it didn't actually allow
oneboxing the root repo e.g https://github.com/discourse/discourse-reactions
We didn't have an engine for this, we were relying on OpenGraph
tags on the HTML rendering of the page like we do with other
oneboxes.
To fix this, we needed a new github engine for repos specifically.
Also, this commit adds a `data-github-private-repo` attribute to
PR, issue, and repo onebox HTML so we have an indicator of
whether the repo was private, which can be used for theme components
and so on.
Followup 560e8aff75
GitHub auth tokens cannot be made with permissions to
access multiple organisations. This is quite limiting.
This commit changes the site setting to be a "secret list"
type, which allows for a key/value mapping where the value
is treated like a password in the UI.
Now when a GitHub URL is requested for oneboxing, the
org name from the URL is used to determine which token
to use for the request.
Just in case anyone used the old site setting already,
there is a migration to create a `default` entry
with that token in the new list setting, and for
a period of time we will consider that token valid to
use for all GitHub oneboxes as well.
This commit adds the ability to onebox private GitHub
commits, pull requests, issues, blobs, and actions using
a new `github_onebox_access_token` site setting. The token
must be set up in correctly to have access to the repos needed.
To do this successfully with the Oneboxer, we need to skip
redirects on the github.com host, otherwise we get a 404
on the URL before it is translated into a GitHub API URL
and has the appropriate headers added.
In 95a82d608d, we lowered the default for
`Onebox.options.max_download_kb` from 10mb to 2mb for security hardening
purposes. However, this resulted in multiple bug reports where seemingly
nomral URLs stopped being oneboxed. It turns out that lowering
`Onebox.options.max_download_kb` resulted in `Onebox::Helpers::DownloadTooLarge` being raised
more often for more URLs in `Onebox::Helpers.fetch_response` which
`Onebox::Helpers.fetch_html_doc` relies on. When
`Onebox::Helpers::DownloadTooLarge` is raised in
`Onebox::Helpers.fetch_response`, we throw away whatever response body
which we have already downloaded at that point. This is not ideal
because Nokogiri can parse incomplete HTML documents and there is a
really high chance that the incomplete HTML document still contains the
information which we need for oneboxing.
Therefore, this commit updates `Onebox::Helpers.fetch_html_doc` to not
throw away the response body when the size of the response body exceeds
`Onebox.options.max_download_size`. Instead, we just take whatever
response which we have and get Nokogiri to parse it.
We have a custom implementation of #symbolize_keys in our Onebox helpers. This is likely a legacy from when Onebox was a standalone gem. This change replaces all usages with either #deep_symbolize_keys from ActiveSupport, or appropriate option to the JSON parser gem used.
We have a custom implementation of #blank? in our Onebox helpers. This is likely a legacy from when Onebox was a standalone gem. This change replaces all usages with respective incarnations of #blank?, #present?, and #presence from ActiveSupport. It changes a bunch of "unless blank" to "if present" as well.
This adds support for oneboxing WEBP and AVIF images in posts and fixing
oneboxing fixes download remote images for those formats too.
Reported in https://meta.discourse.org/t/-/276433?u=falco
Prior to this fix we would output an image with no width/height which would then bypass a large part of `CookedProcessorMixin` and have no aspect ratio. As a result, an image with no size would cause layout shift.
It also removes a fix for oneboxes in chat messages due to this case.
Embed Motoko service's primary URL is transiting from embed.smartcontracts.org to embed.motoko.org, this PR updates the Onebox logic to work for either domain.
Wikimedia provides a thumbnail url for its images, so we should use that
for oneboxes instead of the full-size image. Because the size of the
onebox image we display is quite small anyways the thumbnail wikimedia
provides should suffice and will save bandwidth.
See: https://meta.discourse.org/t/264039
Sometimes we get Maps URL containing a zoom level as a float (17.5z and
not 17z) but this doesn’t work with our current onebox implementation.
While Google accepts those float zoom levels, it removes automatically
the floating part in the URL (thus when visiting a Maps URL containing
17.5z, the URL will be rewritten shortly after as 17z). When putting a
float zoom level in an embedded URL, this actually breaks (Maps API
returns a 400 error).
This patch addresses the issue by allowing the onebox engine to match on
a zoom level expressed as a float but we only keep the integer part thus
rendering properly maps.
Currently when generating a onebox for Discourse topics, some important
context is missing such as categories and tags.
This patch addresses this issue by introducing a new onebox engine
dedicated to display this information when available. Indeed to get this
new information, categories and tags are exposed in the topic metadata
as opengraph tags.
Linking a commit from a GitHub pull request included the complete commit
message, instead of just the first line. The rest of the commit message
will be added to the body of the Onebox.
The order in which Onebox engines are loaded is not guaranteed. Occasionally during tests, the twitter engine would be loaded before the instagram engine, and cause the Instagram Onebox spec to fail due to the lack of `Onebox.options.twitter_client`.
This commit makes the load order of Onebox engines consistent, and fixes the issue in the twitter_status_onebox.
Twitter removed OpenGraph tags from their pages. We can no longer
extract all the information (for example, the quoted tweet) we need
to render Oneboxes without using their API.
Natalie Tay
Vinoth Kannan
Martin Brennan
Alan Guo Xiang Tan
Jan Cernik
Rafael dos Santos Silva
Loïc Guitaut
Jan Cernik
dsims
Blake Erickson
Roman Rizzi
Kris
Jarek Radosz
Ted Johansson
Joffrey JAFFEUX
Roman Agilov
Ryan Vandersmith
Richard
Penar Musaraj
Gerhard Schlager
Daniel Waterworth
David Taylor
Ryan Vandersmith
Bianca Nenciu