Commit Graph

181 Commits

Author SHA1 Message Date
Anders Kaseorg 6331a314d4 Correctly hyphenate “non-”.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2022-04-27 22:10:31 -07:00
Anders Kaseorg a2825e5984 python: Use Python 3.8 typing.{Protocol,TypedDict}.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2022-04-27 12:57:49 -07:00
Alex Vandiver 351bdfaf78 preview: Use cache only as a non-durable cache, not an IPC.
The `get_link_embed_data` / `link_embed_data_from_cache` pair as
introduced in c93f1d4eda uses the cache
as a temporary store inside of the `embed_links` worker; this means
that it must be durable storage, or the worker will stall and re-fetch
the same links to preview them.

Switch to plumbing through the fetched URL embed data as an parameter
to the Markdown evaluation which uses them, rather than using the
cache as an intermediary.  This frees up the cache to be merely a
non-durable cache.

As a side-effect, this removes get_cache_with_key, and
link_embed_data_from_cache which was its only callsite.
2022-04-15 14:48:12 -07:00
Alex Vandiver 327ff9ea0f preview: Use a dataclass for the embed data.
This is significantly cleaner than passing around `Dict[str, Any]` all
of the time.
2022-04-15 14:48:12 -07:00
Alex Vandiver 661c333377 markdown: Use named parameters to add_a helper.
This has enough parameters that it benefits from making which is which
explicit.
2022-04-15 14:48:12 -07:00
Alex Vandiver 452a30305d markdown: Clarify url parameter of "add_a" helper. 2022-04-15 14:48:12 -07:00
Alex Vandiver 1ac0035f8c markdown: Allow whitespace overlaps in topic linkifiers.
`prepare_linkifier_pattern`, as of db934be064, adds a match to the
end of the regex, of either the end of string, or a non-word character
-- this is in place of a negative look-ahead, which is no longer
possible in re2.  This causes the regex to consume trailing
whitespace, and thus not be able to match twice in succession with
`pattern.finditer` -- "#1234 #5678" fails to match because the space
is consumed by the first match of the regex.

Rather than use `pattern.finditer`, write own own version, which
rewinds over the non-word character consumed after the match, if any.
This allows the same "after" non-word character to also satisfy the
"before" of the next match.

Fixes #21502.
2022-03-22 15:40:03 -07:00
Anders Kaseorg 1629d6bfb3 python: Reformat with Black 22 (stable).
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2022-02-18 18:03:13 -08:00
Anders Kaseorg df304c40da markdown: Use built-in hex formatting for unicode_emoji_to_codepoint.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2022-02-03 11:00:04 -08:00
Puneeth Chaganti d55c137277 emoji: Add yellow_large_square and green_large_square emojis.
Wordle has recently become a thing and it uses green, yellow and white (or
black in dark mode) large square unicode characters to let people share their
gameplay. Zulip converts the white and black large square unicode characters to
emojis, but not the green and yellow ones. This causes the Wordle grid to be
misaligned when shared on Zulip.

This commit adds green and yellow large square emojis to our emoji list to fix
the problem.
2022-02-02 16:26:31 -08:00
Puneeth Chaganti 6beb84b553 emoji: Use str.rjust to pad codepoint strings instead of a loop. 2022-02-02 16:26:30 -08:00
Puneeth Chaganti 0eeb74b3c2 emoji: Fix minor typo in unicode_emoji_to_codepoint comment. 2022-02-02 16:26:28 -08:00
Alex Vandiver 19f891968d markdown: Increase the maximum number of image previews per message.
The limit here is purely to prevent breakage in case of a pathological
number of images in a single message; 5 images is entirely possible in
a reasonable message, and causes user confusion when they are not
expended.

Increase the limit to 10 per message.
2022-01-14 11:30:07 -08:00
Steve Howell 4adcaf92f7 refactor: Attach get_stream_name_map to MentionData.
This diff looks slightly noisy, but the main chunk of
code that we moved here has the same logic as before,
and it just gets realm_id from MentionBackend now, instead
of having our markdown processor have to supply it.

We basically want MentionData to be the gatekeeper of
mention data, and then we delegate backend tasks to
MentionBackend.

Soon we will add a cache to MentionBacked, which will
justify this change a bit more.
2021-12-30 11:28:15 -08:00
Steve Howell c6448263c3 refactor: Add MentionBackend.
We will eventually use this to avoid redundant
queries.

The diff is slightly noisy here, but there are no
logic changes.
2021-12-30 11:28:15 -08:00
Steve Howell ea252ab53e refactor: Convert FullNameInfo to a dataclass.
As part of this we no longer query for email, which
is a vestige of when we used emails to identify users
on the frontend.
2021-12-30 11:28:15 -08:00
Steve Howell f5fc348786 mypy: Add explicit types for dbdata references.
When our handlers specifically reference self.md.zulip_db_data,
we now use an explicit type.

We probably want a more robust solution here, such as a semgrep
rule.
2021-12-30 11:28:15 -08:00
Steve Howell df84892aad markdown: Convert DbData to a dataclass. 2021-12-30 11:28:15 -08:00
Steve Howell 4e551f8279 refactor: Introduce get_stream_name_map.
We only need a name -> id map, and the FullNameInfo
type was a lie.
2021-12-30 11:28:15 -08:00
Steve Howell c04a8097f3 mypy: Add EmojiInfo type.
We now serialize still_url as None for non-animated emojis,
instead of omitting the field. The webapp does proper checks
for falsiness here.  The mobile app does not yet use the field
(to my knowledge).

We bump the API version here. More discussion here:

https://chat.zulip.org/#narrow/stream/378-api-design/topic/still_url/near/1302573
2021-12-30 11:28:14 -08:00
Alex Vandiver 6a40c17ccf markdown: CSS-escape preview links.
This adds `soupsieve` as an explicit dependency, but intentionally
does not adjust the provision version, as it was already an indirect
dependency.
2021-10-26 18:17:23 -07:00
Alex Vandiver 52f74bbd9b markdown: Run URL preview links through camo.
Not proxying these requests through camo is a security concern.
Furthermore, on the desktop client, any embed image which is hosted on
a server with an expired or otherwise invalid certificate will trigger
a blocking modal window with no clear source and a confusing error
message; see zulip/zulip-desktop#1119.

Rewrite all `message_embed_image` URLs through camo, if it is enabled.
2021-10-26 18:17:23 -07:00
Anders Kaseorg 58920affd4 python: Remove re.UNICODE flag (redundant in Python 3).
https://docs.python.org/3/library/re.html#re.A

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-10-22 13:42:29 -07:00
Alex Vandiver 9381a3bd45 linkifiers: Support URL percent-encoded bytes.
Supporting URL percent-encoded bytes is possible using `%%20`, but this
is not necessarily very understandable to end-users, even those that
understand percent encoding.

Allow `%20` in linkifier URL format strings, and transform them into
`%%20` in the pattern just before they are applied in markdown
translation.  Care must be taken here, such that already-escaped `%`s
are not escaped an extra time.

We do this before rendering, and not before storage, as
a simplification; the JS-side linkifier at present only understands
`%(foo)s` and thus needs no changes, and to avoid an un-escaping pass
before showing in the admin UI.
2021-10-22 13:00:20 -07:00
Anders Kaseorg 4839b7ed27 url_preview: Interpret og:image relative to full page URL.
og:image is supposed to be an absolute URL, but some sites incorrectly
provide a relative URL.  In this case, it makes more sense to
interpret it relative to the full page URL after redirects, rather
than relative to just the domain part of the page URL before
redirects.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-10-21 12:20:37 -07:00
Alex Vandiver db934be064 CVE-2021-41115: Use re2 for user-supplied linkifier patterns.
Zulip attempts to validate that the regular expressions that admins
enter for linkifiers are well-formatted, and only contain a specific
subset of regex grammar.  The process of checking these
properties (via a regex!) can cause denial-of-service via
backtracking.

Furthermore, this validation itself does not prevent the creation of
linkifiers which themselves cause denial-of-service when they are
executed.  As the validator accepts literally anything inside of a
`(?P<word>...)` block, any quadratic backtracking expression can be
hidden therein.

Switch user-provided linkifier patterns to be matched in the Markdown
processor by the `re2` library, which is guaranteed constant-time.
This somewhat limits the possible features of the regular
expression (notably, look-head and -behind, and back-references);
however, these features had never been advertised as working in the
context of linkifiers.

A migration removes any existing linkifiers which would not function
under re2, after printing them for posterity during the upgrade; they
are unlikely to be common, and are impossible to fix automatically.

The denial-of-service in the linkifier validator was discovered by
@erik-krogh and @yoff, as GHSL-2021-118.
2021-10-04 21:26:24 +00:00
Tim Abbott 545911b051 markdown: Remove useless locless_schemes check.
This check was copied from upstream python-markdown's "safe mode"
before they removed that feature.  The upstream history is that they
introduced this check in
2db5d1c8e4,
which was not a complete security check, and then added the
immediately following check (with an allowlist of schemes) in
0b4ffbb60e.

Their first, incomplete check provides no security benefit and makes
the code hard to reason about, so we remove it.
2021-09-09 09:03:40 -07:00
rht c24ab8c4d3 markdown: Expand list of safelisted URL schemes to match HTML spec. 2021-09-09 09:03:40 -07:00
Anders Kaseorg 66ad6a4583 docs: Inline code spans are not blocks.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-09-07 16:12:39 -07:00
Anders Kaseorg 646c04eff2 Rename default branch to ‘main’.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-09-06 12:56:35 -07:00
Alex Vandiver 4d428490fd outgoing_http: Use OutgoingSession subclasses in more places.
This adds the X-Smokescreen-Role header to proxy connections, to track
usage from various codepaths, and enforces a timeout.  Timeouts were
kept consistent with their previous values, or set to 5s if they had
none previously.
2021-09-01 05:34:13 -07:00
Priyansh Garg 1e51c23494 markdown: Remove unnecessary checks for zulip_message.
This commits removes some unnecessary checks for `self.md.zulip_message`,
which were put there historically, as earlier we used to add the additional
properties like mentions_user_ids, alert_words, etc. to Message dict
only. These were later moved to MessageRenderingResult class in commit
75cea329b but the checks weren't removed.

This is important because while rendering the messages imported from
other chat tools (like Rocket.Chat), the Message dict is not passed to
the markdown, due to which the checks for `self.md.zerver_message` fails
and hence, things like user mentions, stream/topic mentions are not
rendered in the imported messages properly.
2021-08-31 16:53:42 -07:00
Anders Kaseorg 4206e5f00b python: Remove locally dead code.
These changes are all independent of each other; I just didn’t feel
like making dozens of commits for them.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-08-19 01:51:37 -07:00
Anders Kaseorg 806494da06 markdown: Stream and parse incrementally in fetch_open_graph_image.
This way we can stop reading as soon as we get to the body.  Also,
send an Accept header, check that the request was actually successful,
use lxml.etree.iterparse instead of a broken hand-rolled state
machine, and support XHTML, all for negative 28 lines of code.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-08-05 09:17:32 -07:00
Priyansh Garg 0a875c1c4c markdown: Fix jpeg extension in `IMAGE_EXTENSIONS`. 2021-08-05 08:54:02 -07:00
Anders Kaseorg 42fa62e563 Revert "time_widget: Make the generated time string more readable."
This reverts commit 1965584eec.

This syntax has a bad interaction with table syntax and needs to be
rethought.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-08-03 16:45:31 -07:00
Ganesh Pawar 1965584eec time_widget: Make the generated time string more readable.
Before: <time:2021-07-14T00:14:00-07:00>
After: <time:2021-07-14|00:14:00|UTC-07:00>

Fixes #19205
2021-08-02 23:17:01 -07:00
Anders Kaseorg 3665deb93a python: Remove unnecessary intermediate lists.
Generated automatically by pyupgrade.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-08-02 15:53:52 -07:00
Anders Kaseorg 162e9d6c0b fenced_code: Optimize FENCE_RE to fix cubic worst-case complexity.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-07-22 16:40:44 -07:00
Anders Kaseorg c56440ded0 requirements: Upgrade Python requirements.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-07-05 12:23:06 -07:00
Priyansh Garg 94a2be06f3 markdown: Use a shared variable for IMAGE_EXTENSION. 2021-07-02 11:22:55 -07:00
akshatdalton 44a298b671 minor: Use `OUTER_CAPTURE_GROUP` variable instead of string value. 2021-06-25 17:43:27 -07:00
akshatdalton 490f6b6880 markdown: Extract regex in local variables. 2021-06-25 17:43:01 -07:00
PIG208 75cea329b4 markdown: Refactor out additional properties added to Message.
This adds a new class called MessageRenderingResult to contain the
additional properties we added to the Message object (like alert_words)
as well as the rendered content to ensure typesafe reference. No
behavioral change is made except changes in typing.

This is a preparatory change for adding django-stubs to the backend.

Related: #18777
2021-06-24 18:14:53 -07:00
akshatdalton c507931ac8 refactor: Export non-markdown logic in mention.py. 2021-06-14 13:26:30 -07:00
Wesley Aptekar-Cassels d5ba94082a markdown: Increase max rendered message length to 1MB.
This should help with #17425, where messages with lots of LaTeX are
lost, due to the large expansion factor.

This isn't a total fix for this - large messages with lots of LaTeX
can still end up larger than 1MB, and rendering could timeout, but
this fix should help significantly.

1MB is still small enough that I don't expect we'll run into any DOS
problems - my testing didn't show any problems rendering messages that
contain ~1MB of LaTeX.
2021-06-03 10:10:35 -07:00
akshatdalton 7df62ebbaf settings: Make `MAX_MESSAGE_LENGTH` a server-level setting.
This will offer users who are self-hosting to adjust
this value. Moreover, this will help to reduce the
overall time taken to test `test_markdown.py` (since
this can be now overridden with `override_settings`
Django decorator).

This is done as a prep commit for #18641.
2021-06-03 09:26:28 -07:00
akshatdalton 832c763c38 minor: Remove unnecessary `__init__` method in `InlineInterestingLinkProcessor`.
Subclass `Treeprocessor` takes care of the `__init__` method.
2021-05-26 17:13:03 -07:00
Anders Kaseorg bac96cae80 markdown: Fix Dropbox image previews.
?dl=1 causes Dropbox to send Content-Type: application/binary, which
can’t be interpreted by Camo.  Use ?raw=1 instead.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-05-25 13:42:29 -07:00
akshatdalton 503247ebfa refactor: Add class `CompiledInlineProcessor` to de-duplicate code. 2021-05-23 14:30:22 -07:00
akshatdalton 78f26b6031 minor: Use `super` to initialize subclass. 2021-05-23 14:30:22 -07:00
akshatdalton 18203d8af3 markdown: Silence user group mention inside blockquotes. 2021-05-18 17:31:25 -07:00
akshatdalton 0245b590e9 markdown: Add support for user group silent mention.
Prior to this, we only supported direct mention to
the user groups. This commit extends that support
to silent mention for the user groups.
A related test case is also added.

Fixes: #11711.
2021-05-18 17:31:25 -07:00
akshatdalton f56fca308a mention: Refactor `USER_GROUP_MENTIONS_RE` and simplify its related code path.
Earlier, USER_GROUP_MENTIONS_RE was:
r"(?<![^\s\'\"\(,:<])@(\*[^\*]+\*)"

For the syntax: *foo*, this was unnecessarily capturing it as
*foo* and the extraction of `foo` was done using another helper
function: `extract_user_group`.

This is now changed as:
r"(?<![^\s\'\"\(,:<])@(\*(?P<match>[^\*]+)\*)"

and extraction of `foo` can be done just by using the named capture
group `match`.

This change also helps to simplify its related code path.
2021-05-18 17:31:25 -07:00
akshatdalton d5a36ac5e2 mention: Refactor `MENTIONS_RE` and simplify its related code path.
Earlier, MENTIONS_RE was:
r"(?<![^\s\'\"\(,:<])@(?P<silent>_?)(?P<match>\*\*[^\*]+\*\*)"

For the syntax: **foo**, this was unnecessarily capturing it as
**foo** and adding extra operation for the extraction of `foo`.

This is now changed as:
r"(?<![^\s\'\"\(,:<])@(?P<silent>_?)(\*\*(?P<match>[^\*]+)\*\*)"

and extraction of `foo` can be done just by using the named capture
group `match`.

This change also helps to simplify its related code path.
2021-05-18 17:31:25 -07:00
akshatdalton a9d89b3c56 minor: Convert `unicode_emoji_regex` to uppercase.
Following the convention, we use uppercase for
regex. Also, `unicode_emoji_regex` is given a
conventional name ending with `*_RE`: `UNICODE_EMOJI_RE`.
2021-05-18 17:31:25 -07:00
akshatdalton ffc4724287 minor: Convert `emoticon_regex` to uppercase.
Following the convention, we use uppercase for
regex. Also, `emoticon_regex` is given a
conventional name ending with `*_RE`: `EMOTICON_RE`.
2021-05-18 17:31:25 -07:00
akshatdalton 9f6e6709d3 minor: Convert `user_group_mentions` to uppercase.
Following the convention, we use uppercase for
regex. Also, `user_group_mentions` is given a
conventional name ending with `*_RE`: `USER_GROUP_MENTIONS_RE`.
2021-05-18 17:31:25 -07:00
akshatdalton 0a01b1b28e minor: Convert `find_mentions` to uppercase.
Following the convention, we use uppercase for
regex. Also, `find_mentions` is given a
conventional name ending with `*_RE`: `MENTIONS_RE`.
2021-05-18 17:31:25 -07:00
Ganesh Pawar 529f72fa3f markdown: Add support for sms and tel links.
Fixes #18390
2021-05-10 15:15:34 -07:00
akshatdalton 55f4996f16 markdown: Fix silent wildcard mentions bug.
A message containing wildcard mention when quoted (which
is turned into a silent mention) or message with silent
wildcard mention notifies the users by sending desktop,
sound, and missed message email notifications. This
is clearly a bug which is fixed by this commit.

Fixes: #18354.
2021-05-10 12:19:40 -07:00
Anders Kaseorg d0c6f4f400 python: Strip leading and trailing spaces from docstrings.
This is enforced by Black ≥ 21.4b0.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-05-07 22:42:39 -07:00
Anders Kaseorg 995389b4c1 markdown: Don’t apply further Markdown processing to KaTeX output.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-05-01 15:43:35 -07:00
Wesley Aptekar-Cassels 6b7a3fb74a markdown: Rewrite all external images to use Camo.
Requesting external images is a privacy risk, so route all external
images through Camo.

Tweaked by tabbott for better test coverage, more comments, and to fix
bugs.
2021-04-30 10:36:16 -07:00
Anders Kaseorg e3f2ffa681 docs: Capitalize “Markdown” consistently.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-04-26 09:31:08 -07:00
Anders Kaseorg 178736c8eb docs: Fix spelling errors caught by codespell.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-04-26 09:31:08 -07:00
Tim Abbott 2e928a0853 markdown: Remove logic for creating markdown engines for all realms.
This logic likely never ran due to a combination of bugs.

* Running `maybe_update_markdown_engines` unconditionally meant that
  `if md_engine_key in md_engines` was likely always true.
* Introduced in 65838bb: DEFAULT_MARKDOWN_KEY could never be in
  md_engines, so should we have ever reached that code path, we'd have
  tried to rebuild all markdown engines every time.

And it also wasn't clearly helpful -- because we fetch all linkifiers
for a realm on every request anyway, we don't really save database
queries by doing a bulk fetch on startup, and doing so would likely
result in a material regression to Zulip's overall startup time that
we were creating markdown engines for large numbers of realms in bulk
during process startup.
2021-04-13 09:18:18 -07:00
Abhijeet Prasad Bodas 52a86d9604 linkifiers: Use dictionaries for internal structures.
This change does not affect the API in anyway.
All internal code now uses dictionaries to
denote a linkifier, instead of tuples.
2021-04-05 18:16:08 -07:00
Abhijeet Prasad Bodas 68fe912c63 refactor: Rename most of "filter" to "linkifier".
After this only the database table, events,
and API endpoints remain.
2021-04-05 18:14:07 -07:00
Abhijeet Prasad Bodas f896a7667f refactor: Update some uses of "filter" to "linkifier".
This updates some comments and local variables
which could be changed without breaking other
stuff.
2021-04-05 18:14:07 -07:00
Anders Kaseorg ceb7e2d2bd Revert "markdown: Add support to shorten GitHub links."
This reverts commit 9c6d8d9d81 (#16916).

This feature has known bugs, and also wants some design changes to
make it customizable like linkifiers, so we’re retargeting this to
post-4.x.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-04-02 15:52:34 -07:00
Sumanth V Rao e12f682e2e markdown: Include text & url in `topic_links` parameter of our API.
The linkifier code now includes both the shortened text and the expanded
URL, sorted by the order of the occurrence in a topic. This list is passed
back in the `topic_links` parameter of the /messages and the /events APIs.

topic_links earlier vs now:

earlier: ['https://www.google.com', 'https://github.com/zulip/zulip/32']

now: [{'url': 'https://www.google.com', 'text': 'https://www.google/com},
      {'url': 'https://github.com/zulip/zulip/32', 'text': '#32'}]

Similarly, the topic_links local echo logic in the frontend now returns
back an object.

Fixes: #17109.
2021-03-30 15:53:07 -07:00
m-e-l-u-h-a-n 1b8a5a3344 markdown: Refactor backend logic for handling user mention.
Backend logic for handling user mention was cluttered
because it was handled at two stages first in
get_possible_mentions_info while fetching mention data
based on the messsage and then later in UserMentionPattern
which handles processing of text for mention.

Ideally UserMentionPattern should depend on
get_possible_mentions_info only for data but there was a
shared logic between these two that made it hard to debug
any possible bugs.

Updates in this commit make both of these functions
coherent in terms of logic and also add appropiate
comments to improve readability of these functions.

There was also a hidden bug that if a user A is
mentioned in with @**name|id** then @**invalid|id**
again mentioned A because of the way we handled mentions
earlier. It is solved as a result of this refactor and
appropiate test has been added for this.

This has been tested manually as well as by adding new
test to address missing case.
2021-03-28 16:52:48 -07:00
m-e-l-u-h-a-n 2699048208 markdown: Extend user mention syntax to support user_id for mentioning.
Extend our markdown system to support mentioning of users
by id also. Following these changes, it would be possible
to mention users with @**|user_id** and silently mention
using @_**|user_id**.

Main intention for extending the mention syntax is to make
it convenient for bots to mention a users using their ids. It
is to be noted that previous syntax are also supported.

Documentation tweaked by tabbott for better readability.

The changes were tested manually in development server, and also
by adding some new backend and frontend tests.

Fixes: #17487.
2021-03-25 00:44:56 -07:00
akshatdalton 9c6d8d9d81 markdown: Add support to shorten GitHub links.
We add support to shorten links and test their shortening in
well-organized, clean manner that makes it trivial to extend the
GitHub approach for GitLab and perhaps other services.

We only shorten basic types of GitHub links (issue, PR, commit) that
fit a set of simple common patterns; the default behaviour of Autolink
is kept for everything else.

Logic added in frontend and backend Markdown Processor is identical.
This makes easy to extend the logic for other services like GitLab.

Fixes #11895.
2021-03-25 00:39:44 -07:00
m-e-l-u-h-a-n 830c4acedc markdown: Fix invalid mention bug for stream and stream topic mention.
Modifies `StreamPattern` and `StreamTopicPattern` to inherit
from InlineProcessor instead of Pattern. This change is done
because Pattern stopped checking for matching patterns as soon
as it found a match which was not a valid stream. Due to this
all the subsequent mention failed, even if they were valid.
This bug was only present in backend renderring due to
markdown.inlinepatterns.Pattern.

Due to above changes verbose_compile is no longer used for
precompiling STREAM_LINK_REGEX, STREAM_TOPIC_LINK_REGEX as
adds ^(.*?) and (.*?)$ which cause extra overhead of matching
pattern which is not required. With new InlineProcessor these
extra patterns at beggining and end are not required.
So, StreamPattern and StreamTopicPattern now define their own
__init__ method for precompiling the regex.

Fixes #17535.

These changes were tested locally in dev server and by adding
some new markdown tests to test these.
2021-03-23 01:28:30 -07:00
m-e-l-u-h-a-n dadbba0c25 markdown: Fix invalid mention bug for user group mention.
Modifies `UserGroupMentionPattern` to inherit from InlineProcessor
instead of Pattern. This change is done because Pattern
stopped checking for matching patterns as soon as it found
a match which was not a valid user group. Due to this all
the subsequent user group mention failed, even if they were
valid. This bug was only present in backend renderring due to
markdown.inlinepatterns.Pattern.

This was reported as issue #17535.

These changes were tested locally in dev server and by adding
some new markdown tests to test these.
2021-03-23 01:28:30 -07:00
m-e-l-u-h-a-n c8979a5100 markdown: Fix invalid mention bug for user mention.
Modifies `UserMentionPattern` to inherit from InlineProcessor
instead of Pattern. This change is done because Pattern
stopped checking for matching patterns as soon as it found
a match which was not a valid user. Due to this all the
subsequent user mention failed. This bug was only present in
backend renderring due to markdown.inlinepatterns.Pattern.

This was reported as issue #17535.

These changes were tested locally in dev server and by adding
some new markdown tests to test these.
2021-03-23 01:28:30 -07:00
Anders Kaseorg 23088b5d78 markdown: Fix some Any annotations.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-03-17 18:41:46 -07:00
Anders Kaseorg 9864907985 mypy: Correct typing.re imports to typing.
Although typing.re exists in the standard library, mypy has never
recognized it.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-03-17 18:41:46 -07:00
Anders Kaseorg 0a09c9dfd7 markdown: Re-enable typeshed stub for Python-Markdown.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-03-10 11:49:59 -08:00
Anders Kaseorg b728727d9d timeout: Remove unnecessary varargs support.
Mypy can check it this way.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-02-15 17:05:28 -08:00
Anders Kaseorg 6e4c3e41dc python: Normalize quotes with Black.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-02-12 13:11:19 -08:00
Anders Kaseorg 11741543da python: Reformat with Black, except quotes.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-02-12 13:11:19 -08:00
Anders Kaseorg ae0afa2390 markdown: Explode config dict.
Commit 434094e599 (#11321) changed this
from an Extension to a subclass of Markdown, so it no longer has any
reason to use a config dict structured like that of an Extension.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-02-05 10:52:31 -05:00
Anders Kaseorg 4ca66e7278 timezone: Correct common_timezones dictionary.
The changes are as follows:

• Fix one day offset in all western zones.
• Correct CST from -64800 to -21600 and CDT from -68400 to -18000.
• Disambiguate PST in favor of -28000 over +28000.
• Add GMT, UTC, WET, previously excluded for being at offset 0.
• Add ACDT, AEDT, AKST, MET, MSK, NST, NZDT, PKT, which the previous
  code did not find.
• Remove numbered abbreviations -12, …, +14, which are unnecessary.
• Remove MSD and PKST, which are no longer used.

Hardcode the dict and verify it with a test, so that future
discrepancies won’t go silently unnoticed.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2021-01-27 15:23:15 -08:00
Anders Kaseorg fbf8ce0305 markdown: Add types for extra Markdown members.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-11-10 15:54:27 -08:00
Anders Kaseorg b48bdc65b9 markdown: Fix AlertWordNotificationProcessor.run type.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-11-10 15:54:27 -08:00
Anders Kaseorg 9573f6dc00 markdown: Fix build_block_parser type.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-11-10 15:54:27 -08:00
Anders Kaseorg 060036dfd5 markdown: Merge build_engine into Markdown constructor.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-11-10 15:54:27 -08:00
Anders Kaseorg 08c64f5cfa markdown: Fix imports for compatibility with typeshed stubs.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-11-10 15:54:27 -08:00
akshatdalton 620e9cbf72 markdown: Fix merging of separate quotations.
Initally, when writing two or more quotes, having
a blank line in between them, merges those quotes.
This created confusion especially in "quote and reply".

This commit fixes such issues. Now two or more quotes
having a blank line in between them, will not get merged.

This change is correct both for usability and for improving our
compatibility with CommonMark.

Fixes #14379.
2020-10-30 15:21:15 -07:00
Anders Kaseorg 1352f2f233 python: Replace manual quote_plus usage with urlencode.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-10-27 13:47:02 -07:00
Anders Kaseorg 72d6ff3c3b docs: Fix more capitalization issues.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-10-23 11:46:55 -07:00
Anders Kaseorg e513b75e86 markdown: Remove handler for old bug with incompatible twitter library.
See commit 8b002040e0 and #86.  The
development environment bug that necessitated this handler has long
been irrelevant.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-10-23 11:30:26 -07:00
akshatdalton 287c4ed2bb markdown: Fix Youtube and Vimeo preview overriding markdown link titles bug.
Initially markdown titles were overridden by Youtube and Vimeo preview titles.
But now it will check if any markdown title is present to replace Youtube or
Vimeo preview titles, if preview of linked websites is enabled.
Fixes #16100
2020-10-19 12:06:13 -07:00
Anders Kaseorg 7f69c1d3d5 python: Catch specific exceptions from requests.
Signed-off-by: Anders Kaseorg <anders@zulip.com>
2020-10-11 16:11:41 -07:00
Aman Agrawal 1b5b82e712 RealmFilterPattern: Mark converted content as AtomicString.
If multiple filters match the same string, we run into an infinite
loop of converting string into urls. To fix it, we mark the matched
string as atomic after first conversion.
2020-09-22 15:10:38 -07:00
Alex Vandiver 03c6a0f182 markdown: Skip other common file extensions in linking, sort. 2020-09-21 21:03:29 -07:00
Alex Vandiver 4361ce1246 markdown: Use tlds package to keep updated list of TLDs.
Also remove a useage of "blacklist."
2020-09-21 21:03:29 -07:00