* Move ActivityPub::FetchRemoteAccountService to ActivityPub::FetchRemoteActorService
ActivityPub::FetchRemoteAccountService is kept as a wrapper for when the actor is
specifically required to be an Account
* Refactor SignatureVerification to allow non-Account actors
* fixup! Move ActivityPub::FetchRemoteAccountService to ActivityPub::FetchRemoteActorService
* Refactor ActivityPub::FetchRemoteKeyService to potentially return non-Account actors
* Refactor inbound ActivityPub payload processing to accept non-Account actors
* Refactor inbound ActivityPub processing to accept activities relayed through non-Account
* Refactor how Account key URIs are built
* Refactor Request and drop unused key_id_format parameter
* Rename ActivityPub::Dereferencer `signature_account` to `signature_actor`
* Add a more descriptive PrivateNetworkAddressError exception class
* Remove unnecessary exception class to rescue clause
* Remove unnecessary include to JsonLdHelper
* Give more neutral error message when too many webfinger redirects
* Remove unnecessary guard condition
* Rework how “ActivityPub::FetchRemoteAccountService” handles errors
Add “suppress_errors” keyword argument to avoid raising errors in
ActivityPub::FetchRemoteAccountService#call (default/previous behavior).
* Rework how “ActivityPub::FetchRemoteKeyService” handles errors
Add “suppress_errors” keyword argument to avoid raising errors in
ActivityPub::FetchRemoteKeyService#call (default/previous behavior).
* Fix Webfinger::RedirectError not being a subclass of Webfinger::Error
* Add suppress_errors option to ResolveAccountService
Defaults to true (to preserve previous behavior). If set to false,
errors will be raised instead of caught, allowing the caller to be
informed of what went wrong.
* Return more precise error when failing to fetch account signing AP payloads
* Add tests
* Fixes
* Refactor error handling a bit
* Fix various issues
* Add specific error when provided Digest is not 256 bits of base64-encoded data
* Please CodeClimate
* Improve webfinger error reporting
* Add database table for status-specific filters
* Add REST endpoints, entities and attributes
* Show status filters in /filters interface
* Perform server-side filtering for individual posts filters
* Fix filtering on context mismatch
* Refactor `toServerSideType` by moving it to its own module
* Move loupe and delete icons to their own module
* Add ability to filter individual posts from WebUI
* Replace keyword list by warnings (expired, context mismatch)
* Refactor server-side filtering code
* Add tests
* Add model for custom filter keywords
* Use CustomFilterKeyword internally
Does not change the API
* Fix /filters/edit and /filters/new
* Add migration tests
* Remove whole_word column from custom_filters (covered by custom_filter_keywords)
* Redesign /filters
Instead of a list, present a card that displays more information and handles
multiple keywords per filter.
* Redesign /filters/new and /filters/edit to add and remove keywords
This adds a new gem dependency: cocoon, as well as a npm dependency:
cocoon-js-vanilla. Those are used to easily populate and remove form fields
from the user interface when manipulating multiple keyword filters at once.
* Add /api/v2/filters to edit filter with multiple keywords
Entities:
- `Filter`: `id`, `title`, `filter_action` (either `hide` or `warn`), `context`
`keywords`
- `FilterKeyword`: `id`, `keyword`, `whole_word`
API endpoits:
- `GET /api/v2/filters` to list filters (including keywords)
- `POST /api/v2/filters` to create a new filter
`keywords_attributes` can also be passed to create keywords in one request
- `GET /api/v2/filters/:id` to read a particular filter
- `PUT /api/v2/filters/:id` to update a new filter
`keywords_attributes` can also be passed to edit, delete or add keywords in
one request
- `DELETE /api/v2/filters/:id` to delete a particular filter
- `GET /api/v2/filters/:id/keywords` to list keywords for a filter
- `POST /api/v2/filters/:filter_id/keywords/:id` to add a new keyword to a
filter
- `GET /api/v2/filter_keywords/:id` to read a particular keyword
- `PUT /api/v2/filter_keywords/:id` to edit a particular keyword
- `DELETE /api/v2/filter_keywords/:id` to delete a particular keyword
* Change from `irreversible` boolean to `action` enum
* Remove irrelevent `irreversible_must_be_within_context` check
* Fix /filters/new and /filters/edit with update for filter_action
* Fix Rubocop/Codeclimate complaining about task names
* Refactor FeedManager#phrase_filtered?
This moves regexp building and filter caching to the `CustomFilter` class.
This does not change the functional behavior yet, but this changes how the
cache is built, doing per-custom_filter regexps so that filters can be matched
independently, while still offering caching.
* Perform server-side filtering and output result in REST API
* Fix numerous filters_changed events being sent when editing multiple keywords at once
* Add some tests
* Use the new API in the WebUI
- use client-side logic for filters we have fetched rules for.
This is so that filter changes can be retroactively applied without
reloading the UI.
- use server-side logic for filters we haven't fetched rules for yet
(e.g. network error, or initial timeline loading)
* Minor optimizations and refactoring
* Perform server-side filtering on the streaming server
* Change the wording of filter action labels
* Fix issues pointed out by linter
* Change design of “Show anyway” link in accordence to review comments
* Drop “irreversible” filtering behavior
* Move /api/v2/filter_keywords to /api/v1/filters/keywords
* Rename `filter_results` attribute to `filtered`
* Rename REST::LegacyFilterSerializer to REST::V1::FilterSerializer
* Fix systemChannelId value in streaming server
* Simplify code by removing client-side filtering code
The simplifcation comes at a cost though: filters aren't retroactively
applied anymore.
- `GET /api/v1/admin/domain_allows` lists allowed domains
- `GET /api/v1/admin/domain_allows/:id` shows one by ID
- `DELETE /api/v1/admin/domain_allows/:id` deletes a given domain from the list
of allowed domains
- `POST /api/v1/admin/domain_allows` to allow a new domain:
if that domain is already allowed, the existing DomainAllow will be returned
- Add rake task for generating Apple/Android icons and favicons from SVG
- Add rake task for generating PNG icons and logos for e-mails from SVG
- Remove obsolete Microsoft icons and configuration
- Remove PWA shortcut icons
* Add /api/v1/admin/domain_blocks
Fixes#18140
- `GET /api/v1/admin/domain_blocks` lists domain blocks
- `GET /api/v1/admin/domain_blocks/:id` shows one by ID
- `DELETE /api/v1/admin/domain_blocks/:id` deletes a given domain block
- `POST /api/v1/admin/domain_blocks` to create a new domain block:
if it conflicts with an existing one, returns an error with
an attribute `existing_domain_block` with the rendered domain block
* Simplify conflict handling as suggested in review
* Change unapproved and unconfirmed account to not be accessible in the REST API
* Change Account#searchable? to reject unconfirmed and unapproved users
* Disable search for unapproved and unconfirmed users in Account.search_for
* Disable search for unapproved and unconfirmed users in Account.advanced_search_for
* Remove unconfirmed and unapproved accounts from Account.searchable scope
* Prevent mentions to unapproved/unconfirmed accounts
* Fix some old tests for Account.advanced_search_for
* Add some Account.advanced_search_for tests for existing behaviors
* Add some tests for Account.search_for
* Add Account.advanced_search_for tests unconfirmed and unapproved accounts
* Add Account.searchable tests
* Fix Account.without_unapproved scope potentially messing with previously-applied scopes
* Allow lookup of unconfirmed/unapproved accounts through /api/v1/accounts/lookup
This is so that the API can still be used to check whether an username is free
to use.
* Change RSS feeds
- Use date and time for titles instead of ellipsized text
- Use full content in body, even when there is a content warning
- Use media extensions
* Change feed icons and add width and height attributes to custom emojis
* Fix custom emoji animate on hover breaking
* Fix tests
* Fix PeerTube videos appearing with an erroneous “Edited at” marker
PeerTube videos have an `updated` field equal to `published`.
When processing an incoming activity that has the same value for `updated` and
`published`, assume this doesn't represent an actual edit.
* Please CodeClimate
* Change post text edit to not be considered significant if it's identical after reformatting
* We don't need to clear previous change information anymore
* Require status edits to be explicit, except for poll tallies
* Fix tests
* Add some tests
* Add poll-related tests
* Add HTML-formatting related tests
* Fix /api/v1/admin/accounts
Compatibility was broken since #17009 which changed the underlying filter class
without changing the controller.
This commits restore support for the old parameters.
* Add /api/v2/admin/accounts with the new parameters
* Add tests
* Add missing filter for `silenced` status
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>
* Remove obsolete RSS::Serializer test
Since #17828, RSS::Serializer no longer has specific code for deleted statuses,
but it is never called on deleted statuses anyway.
* Rename erroneously-named test files
* Fix failing test
* Fix test deprecation warnings
* Update CircleCI Ruby orb
1.4.0 has a bug that does not match all the test files due to incorrect
globbing
* Fix edits with no actual changes being allowed locally
* Fix edits with no actual changes being allowed through ActivityPub
* Fix false positive changes caused by description processing in model
* Fix not recording poll expiration update
* Fix test
* Revert changes to ProcessStatusUpdateService
* Various fixes and improvements
* Fix code style issues
* Various changes and improvements
* Add guard clause
* Fix searching for an already-known status by URL not working
* Fix Update processing from statuses prior to 20220302232632
`ordered_media_attachment_ids_changed?` would return `true` when going from
`nil` to anything (including `[]`).
* Add tests
* Change how changes to media attachments are stored for edits
Fix not being able to re-order media attachments
* Fix not broadcasting updates when polls/media is changed through ActivityPub
* Various fixes and improvements
* Update app/models/report.rb
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
* Add tracking of media attachment description changes
* Change poll in status edit to have a structure closer to the real one
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
* Change design of federation pages in admin UI
* Fix query performance in instance media attachments measure
* Fix reblogs being included in instance languages dimension
* Fix performance of account timelines
* Various fixes and improvements
* Fix duplicate results being returned
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
* Fix grouping for pinned statuses scope
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
* Add `/api/v1/accounts/familiar_followers` to REST API
* Change hide network preference to be stored consistently for local and remote accounts
* Add dummy classes to migration
* Apply suggestions from code review
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
Co-authored-by: Claire <claire.github-309c@sitedethib.com>
* Redesign /about when already logged in
* Fix sign up form still showing when OMNIAUTH_ONLY is set
* Fix tests
* Change wording based on suggestions
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>
Co-authored-by: Eugen Rochko <eugen@zeonfederated.com>
* Add trending statuses
* Fix dangling items with stale scores in localized sets
* Various fixes and improvements
- Change approve_all/reject_all to approve_accounts/reject_accounts
- Change Trends::Query methods to not mutate the original query
- Change Trends::Query#skip to offset
- Change follow recommendations to be refreshed in a transaction
* Add tests for trending statuses filtering behaviour
* Fix not applying filtering scope in controller
* Add appeals
* Add ability to reject appeals and ability to browse pending appeals in admin UI
* Add strikes to account page in settings
* Various fixes and improvements
- Add separate notification setting for appeals, separate from reports
- Fix style of links in report/strike header
- Change approving an appeal to not restore statuses (due to federation complexities)
- Change style of successfully appealed strikes on account settings page
- Change account settings page to only show unappealed or recently appealed strikes
* Change appealed_at to overruled_at
* Fix missing method error
* Change tests to have more specific expectations on sent ActivityPub payloads
* Check that payload doesn't actually contain the contents of the boosted toot
* Fix Undo Announce sometimes inlining the originally Announced status
sidekiq-bulk's push_bulk can either accept arguments directly or run them
through a block.
Setting expectations on the result of evaluating the blocks allows testing
more code (the block itself) and the test is moved closer to the *interface*
of the tested code than its precise implementation.
* Add editing for published statuses
* Fix change of multiple-choice boolean in poll not resetting votes
* Remove the ability to update existing media attachments for now
* Fix structured data parsing from links choking on bad data
- Fix og:url meta tag being prioritized over canonical link tag
- Fix structured data parsing choking on commented-out CDATA declarations
- Fix HTML entities in title, description, provider_name, author_name
- Change structured data parsing to attempt every JSON-LD script tag
* Remove unnecessary slash escapes from CDATA regex pattern
* Change account and user fabricators to simplify and improve tests
- `Fabricate(:account)` implicitly fabricates an associated `user` if
no `domain` attribute is given (an account with `domain: nil` is
considered a local account, but no user record was created), unless
`user: nil` is passed
- `Fabricate(:account, user: Fabricate(:user))` should still be possible
but is discouraged.
* Fix and refactor tests
- avoid passing unneeded attributes to `Fabricate(:user)` or
`Fabricate(:account)`
- avoid embedding `Fabricate(:user)` into a `Fabricate(:account)` or the other
way around
- prefer `Fabricate(:user, account_attributes: …)` to
`Fabricate(:user, account: Fabricate(:account, …)`
- also, some tests were using remote accounts with local user records, which is
not representative of production code.
* Fix error-prone SQL queries in Account search
While this code seems to not present an actual vulnerability, one could
easily be introduced by mistake due to how the query is built.
This PR parameterises the `to_tsquery` input to make the query more robust.
* Harden code for Status#tagged_with_all and Status#tagged_with_none
Those two scopes aren't used in a way that could be vulnerable to an SQL
injection, but keeping them unchanged might be a hazard.
* Remove unneeded spaces surrounding tsquery term
* Please CodeClimate
* Move advanced_search_for SQL template to its own function
This avoids one level of indentation while making clearer that the SQL template
isn't build from all the dynamic parameters of advanced_search_for.
* Add tests covering tagged_with, tagged_with_all and tagged_with_none
* Rewrite tagged_with_none to avoid multiple joins and make it more robust
* Remove obsolete brakeman warnings
* Revert "Remove unneeded spaces surrounding tsquery term"
The two queries are not strictly equivalent.
This reverts commit 86f16c537e06c6ba4a8b250f25dcce9f049023ff.
* Add support for editing for published statuses
* Fix references to stripped-out code
* Various fixes and improvements
* Further fixes and improvements
* Fix updates being potentially sent to unauthorized recipients
* Various fixes and improvements
* Fix wrong words in test
* Fix notifying accounts that were tagged but were not in the audience
* Fix mistake
* Add admin option to remove canonical email blocks from a deleted account
* Add tootctl canonical_email_blocks to inspect and remove canonical email blocks
* Add trending links
* Add overriding specific links trendability
* Add link type to preview cards and only trend articles
Change trends review notifications from being sent every 5 minutes to being sent every 2 hours
Change threshold from 5 unique accounts to 15 unique accounts
* Fix tests
* Fix error when suspending user with an already-existing canonical email block
Fixes#17033
While attempting to create a `CanonicalEmailBlock` with an existing hash would
raise an `ActiveRecord::RecordNotUnique` error, this being done within a
transaction would cancel the whole transaction. For this reason, checking for
uniqueness in Rails would query the database within the transaction and avoid
invalidating the whole transaction for this reason.
A race condition is still possible, where multiple accounts sharing a canonical
email would be blocked in concurrent transactions, in which only one would
succeed, but that is way less likely to happen that the current issue, and can
always be retried after the first failure, unlike the current situation.
* Add tests
* Add tests
* Fix some link previews being incorrectly generated from different prior links
PR #12403 added a cache to avoid redundant queries when the OEmbed endpoint can
be guessed from the URL. This caching mechanism is not perfectly correct as
there is no guarantee that all pages from a given domain share the same
OEmbed provider endpoint.
This PR prevents the FetchOEmbedService from caching OEmbed endpoint that
cannot be generalized by replacing a fully-qualified URL from the endpoint's
parameters, greatly reducing the number of incorrect cached generalizations.
* Add support for fetching Create and Announce activities by URI
This should improve compatibility with ZAP and offer a way to fetch boosts,
which is currently not possible.
* Add tests
* Add followed_by? to account_interactions
* Add RemoveFromFollowersService
* Fix AccountBatch to use RemoveFromFollowersService
* Add remove from followers API
* Fix media attachment size validation not correctly accounting for file type
Fixes a regression introduced in #16724 caused by the fact that kt-paperclip
now correctly runs validations before processing, meaning that file size
verification could not rely on our before_post_processing hook.
Moved the `before_post_processing` hooks to `before_validate` to make sure
the media attachment type is set correctly before the file gets validated.
* Add tests
* Switch from unmaintained paperclip to kt-paperclip
* Drop some compatibility monkey-patches not required by kt-paperclip
* Drop media spoof check monkey-patching
It's broken with kt-paperclip and hopefully it won't be needed anymore
* Fix regression introduced by paperclip 6.1.0
* Do not rely on pathname to call FastImage
* Add test for ogg vorbis file with cover art
* Add audio/vorbis to the accepted content-types
This seems erroneous as this would be the content-type for a vorbis stream
without an ogg container, but that's what the `marcel` gem outputs, so…
* Restore missing for_as_default method
* Refactor Attachmentable concern and delay Paperclip's content-type spoof check
Check for content-type spoofing *after* setting the extension ourselves, this
fixes a regression with kt-paperclip's validations being more strict than
paperclip 6.0.0 and rejecting some Pleroma uploads because of unknown
extensions.
* Please CodeClimate
* Add audio/vorbis to the unreliable set
It doesn't correspond to a file format and thus has no extension associated.
* Stop setting a shortcode to newly-created media attachments
The WebUI has stopped using the “short media URL” in ages. This isn't used
anywhere except for mail notifications.
Deprecating it would allow us to eventually get rid of at least a database
column and corruption-prone index, as well as a controller.
* Fix tests
* Add tests
* Add security-related tests
My first (unpublished) attempt at fixing the issues introduced (extremely
hard-to-exploit) security vulnerabilities, addressing them in a test.
* Fix authentication failures after going halfway through a sign-in attempt
* Refactor `authenticate_with_sign_in_token` and `authenticate_with_two_factor` to make the two authentication steps more obvious
* Fix followers synchronization mechanism not working when URI has empty path
To my knowledge, there is no current implementation on the fediverse
that can use bare domains (e.g., actor is at https://example.org instead of
something like https://example.org/actor) that also plans to support the
followers synchronization mechanism. However, Mastodon's current implementation
would exclude such accounts from followers list.
Also adds tests and rename them to reflect the proper method names.
* Move url prefix regexp to its own constant
* Add account statuses cleanup policy model
* Record last inspected toot to delete to speed up successive calls to statuses_to_delete
* Add service to cleanup a given account's statuses within a budget
* Add worker to go through account policies and delete old toots
* Fix last inspected status id logic
All existing statuses older or equal to last inspected status id must be
kept by the current policy. This is an invariant that must be kept so that
resuming deletion from the last inspected status remains sound.
* Add tests
* Refactor scheduler and add tests
* Add user interface
* Add support for discriminating based on boosts/favs
* Add UI support for min_reblogs and min_favs, rework UI
* Address first round of review comments
* Replace Snowflake#id_at_start with with_random parameter
* Add tests
* Add tests for StatusesCleanupController
* Rework settings page
* Adjust load-avoiding mechanisms
* Please CodeClimate
* Add account_notes relationship
* Add tests
* Fix owned account notes not being deleted when an account is deleted
* Add post-migration to clean up orphaned account notes
* Change references to tootsuite/mastodon to mastodon/mastodon
* Remove obsolete test fixture
* Replace occurrences of tootsuite/mastodon with mastodon/mastodon in CHANGELOG
And a few other places
* Fix anonymous access to outbox not being cached by the reverse proxy
Up until now, anonymous access to outbox was marked as public, but with a
0 duration for caching, which means remote proxies would only serve from cache
when the server was completely overwhelmed.
Changed that cache duration to one minute, so that repeated anonymous access
to one account's outbox can be appropriately cached.
Also added `Signature` to the `Vary` header in case a page is requested, so
that authenticated fetches are never served from cache (which only contains
public toots).
* Remove Vary: Accept header from webfinger controller
Indeed, we have stopped returning xrd, and only ever return jrd, so the
Accept request header does not matter anymore.
* Cache negative webfinger hits for 3 minutes
* Add tests
* Fix serialization of followers/following counts when user hides their network
Fixes#16382
Signed-off-by: Claire <claire.github-309c@sitedethib.com>
If a status with a hashtag becomes very popular, it stands to
reason that the hashtag should have a chance at trending
Fix no stats being recorded for hashtags that are not allowed
to trend, and stop ignoring bots
Remove references to hashtags in profile directory from the code
and the admin UI
* Fix issues with POSIX::Spawn, Terrapin and Ruby 3.0
Also improve the Terrapin monkey-patch for the stderr/stdout issue.
* Fix keyword argument handling throughout the codebase
* Monkey-patch Paperclip to fix keyword arguments handling in validators
* Change validation_extensions to please CodeClimate
* Bump microformats from 4.2.1 to 4.3.1
* Allow Ruby 3.0
* Add Ruby 3.0 test target to CircleCI
* Add test for admin dashboard warnings
* Fix admin dashboard warnings on Ruby 3.0
Clicking the confirmation link multiple times currently leads to entering
account settings, which can be confusing. This commit changes that so that
it redirects to the root path, so it behaves the same way as clicking only
once in most cases.
* Add tests
* Ensure deleted statuses are marked as such
* Save some redis memory by not storing URIs in delete_upon_arrival values
* Avoid possible race condition when processing incoming Deletes
* Avoid potential duplicate Delete forwards
* Lower lock durations to reduce issues in case of hard crash of the Rails process
* Check for `lock.aquired?` and improve comment
* Refactor RedisLock usage in app/lib/activitypub
* Fix using incorrect or non-existent sender for relaying Deletes
Prevent new accounts from being created using the same underlying
e-mail as a suspended account using extensions and period
permutations. Stores e-mails as a SHA256 hash
* Update devise-two-factor to unreleased fork for Rails 6 support
Update tests to match new `rotp` version.
* Update nsa gem to unreleased fork for Rails 6 support
* Update rails to 6.1.3 and rails-i18n to 6.0
* Update to unreleased fork of pluck_each for Ruby 6 support
* Run "rails app:update"
* Add missing ActiveStorage config file
* Use config.ssl_options instead of removed ApplicationController#force_ssl
Disabled force_ssl-related tests as they do not seem to be easily testable
anymore.
* Fix nonce directives by removing Rails 5 specific monkey-patching
* Fix fixture_file_upload deprecation warning
* Fix yield-based test failing with Rails 6
* Use Rails 6's index_with when possible
* Use ActiveRecord::Cache::Store#delete_multi from Rails 6
This will yield better performances when deleting an account
* Disable Rails 6.1's automatic preload link headers
Since Rails 6.1, ActionView adds preload links for javascript files
in the Links header per default.
In our case, that will bloat headers too much and potentially cause
issues with reverse proxies. Furhermore, we don't need those links,
as we already output them as HTML link tags.
* Switch to Rails 6.0 default config
* Switch to Rails 6.1 default config
* Do not include autoload paths in the load path
* Bypass MX validation for explicitly allowed domains
This spares some lookups and prevent issues in some edge cases with
local domains.
* Add tests
* Fix test
* Improve account counters handling
* Use ActiveRecord::Base::sanitize_sql to pass values instead of interpolating them
Keep using string interpolation for `key` as it is safe and using
“ActiveRecord::Base::sanitize_sql_hash_for_assignment” would require stitching
bits of SQL in a way that is not more easily checked for safety.
* Add migration hook to catch PostgreSQL versions earlier than 9.5
* Use ActiveRecord::Result#to_ary instead of deprecated to_hash
They do the same thing, and to_hash has been removed from Rails 6.1
* Explicitly name polymorphic indexes to workaround a bug in Rails 6.1
cf. https://github.com/rails/rails/issues/41693
* Fix incorrect usage of “foreign_key” in migration script
* Use `ActiveModel::Errors#delete` instead of deprecated clear method
* Fix link headers tests on Rails 6.1
Rails 6.1 adds values to the Link header by default, thus it is not a
LinkHeader object anymore. Fix the test to parse the Link header instead
of assuming it is a LinkHeader.
* Prepare Mastodon for zeitwerk autoloader (Rails 6)
Add inflections and rename/move a few classes.
In particular, app/lib/exceptions.rb and app/lib/sanitize_config.rb
were manually loaded while still in autoload paths.
* Add inflection for Url → URL
* Fix misuse of foreign_type
* Fix use of removed "add_template_helper"
* Use response.media_type instead of response.content_type in tests
* Fix CSV export controller test on Rails 6
Rails 6 sets a "filename*" field in the Content-Disposition header to
explicitly encode the filename as UTF-8.
This changes checks the first part of the Content-Disposition header so
it matches in both Rails 5 and Rails 6.
* Fix emoji formatting with Rails 6
* Make emoji output more idiomatic and robust
* Switch from redis-rails gem to built-in Rails redis cache storage
Claire