- For WebAuthn Credential level 3, the `backup_eligible` and
`backup_state` flags are checked if they are consistent with the values
given on login. Forgejo never stored this data, so add a database
migration that makes all webauthn credentials 'legacy' and on the next
first use capture the values of `backup_eligible` and `backup_state`.
As suggested in https://github.com/go-webauthn/webauthn/discussions/219#discussioncomment-10429662
- Adds unit tests.
- Add E2E test.
In the OpenID flows, the "CfTurnstileSitekey" wasn't populated, which
caused those flows to fail if using Turnstile as the Captcha
implementation.
This adds the missing context variables, allowing Turnstile to be used
in the OpenID flows.
(cherry picked from commit 0d24c9f383255605d68a92cc5f087c3f16a1d735)
- When people click on the logout button, a event is sent to all
browser tabs (actually to a shared worker) to notify them of this
logout. This is done in a blocking fashion, to ensure every registered
channel (which realistically should be one for every user because of the
shared worker) for a user receives this message. While doing this, it
locks the mutex for the eventsource module.
- Codeberg is currently observing a deadlock that's caused by this
blocking behavior, a channel isn't receiving the logout event. We
currently don't have a good theory of why this is being caused. This in
turn is causing that the logout functionality is no longer working and
people no longer receive notifications, unless they refresh the page.
- This patchs makes this message non-blocking and thus making it
consistent with the other messages. We don't see a good reason why this
specific event needs to be blocking and the commit introducing it
doesn't offer a rationale either.
- if `groups` scope provided it checks if all, r:org or r:admin are
provided to pass all the groups. otherwise only public memberships
- in InfoOAuth it captures scopes from the token if provided in the
header. the extraction from the header is maybe a candidate for the
separate function so no duplicated code
These are the three conflicted changes from #4716:
* https://github.com/go-gitea/gitea/pull/31632
* https://github.com/go-gitea/gitea/pull/31688
* https://github.com/go-gitea/gitea/pull/31706
cc @earl-warren; as per discussion on https://github.com/go-gitea/gitea/pull/31632 this involves a small compatibility break (OIDC introspection requests now require a valid client ID and secret, instead of a valid OIDC token)
## Checklist
The [developer guide](https://forgejo.org/docs/next/developer/) contains information that will be helpful to first time contributors. There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).
### Tests
- I added test coverage for Go changes...
- [ ] in their respective `*_test.go` for unit tests.
- [x] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
### Documentation
- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [ ] I did not document these changes and I do not expect someone else to do it.
### Release notes
- [ ] I do not want this change to show in the release notes.
- [ ] I want the title to show in the release notes with a link to this pull request.
- [ ] I want the content of the `release-notes/<pull request number>.md` to be be used for the release notes instead of the title.
<!--start release-notes-assistant-->
## Draft release notes
<!--URL:https://codeberg.org/forgejo/forgejo-->
- Breaking features
- [PR](https://codeberg.org/forgejo/forgejo/pulls/4724): <!--number 4724 --><!--line 0 --><!--description T0lEQyBpbnRlZ3JhdGlvbnMgdGhhdCBQT1NUIHRvIGAvbG9naW4vb2F1dGgvaW50cm9zcGVjdGAgd2l0aG91dCBzZW5kaW5nIEhUVFAgYmFzaWMgYXV0aGVudGljYXRpb24gd2lsbCBub3cgZmFpbCB3aXRoIGEgNDAxIEhUVFAgVW5hdXRob3JpemVkIGVycm9yLiBUbyBmaXggdGhlIGVycm9yLCB0aGUgY2xpZW50IG11c3QgYmVnaW4gc2VuZGluZyBIVFRQIGJhc2ljIGF1dGhlbnRpY2F0aW9uIHdpdGggYSB2YWxpZCBjbGllbnQgSUQgYW5kIHNlY3JldC4gVGhpcyBlbmRwb2ludCB3YXMgcHJldmlvdXNseSBhdXRoZW50aWNhdGVkIHZpYSB0aGUgaW50cm9zcGVjdGlvbiB0b2tlbiBpdHNlbGYsIHdoaWNoIGlzIGxlc3Mgc2VjdXJlLg==-->OIDC integrations that POST to `/login/oauth/introspect` without sending HTTP basic authentication will now fail with a 401 HTTP Unauthorized error. To fix the error, the client must begin sending HTTP basic authentication with a valid client ID and secret. This endpoint was previously authenticated via the introspection token itself, which is less secure.<!--description-->
<!--end release-notes-assistant-->
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/4724
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: Shivaram Lingamneni <slingamn@cs.stanford.edu>
Co-committed-by: Shivaram Lingamneni <slingamn@cs.stanford.edu>
This leverages the existing `sync_external_users` cron job to
synchronize the `IsActive` flag on users who use an OAuth2 provider set
to synchronize. This synchronization is done by checking for expired
access tokens, and using the stored refresh token to request a new
access token. If the response back from the OAuth2 provider is the
`invalid_grant` error code, the user is marked as inactive. However, the
user is able to reactivate their account by logging in the web browser
through their OAuth2 flow.
Also changed to support this is that a linked `ExternalLoginUser` is
always created upon a login or signup via OAuth2.
Ideally, we would also refresh permissions from the configured OAuth
provider (e.g., admin, restricted and group mappings) to match the
implementation of LDAP. However, the OAuth library used for this `goth`,
doesn't seem to support issuing a session via refresh tokens. The
interface provides a [`RefreshToken`
method](https://github.com/markbates/goth/blob/master/provider.go#L20),
but the returned `oauth.Token` doesn't implement the `goth.Session` we
would need to call `FetchUser`. Due to specific implementations, we
would need to build a compatibility function for every provider, since
they cast to concrete types (e.g.
[Azure](https://github.com/markbates/goth/blob/master/providers/azureadv2/azureadv2.go#L132))
---------
Co-authored-by: Kyle D <kdumontnu@gmail.com>
(cherry picked from commit 416c36f3034e228a27258b5a8a15eec4e5e426ba)
Conflicts:
- tests/integration/auth_ldap_test.go
Trivial conflict resolved by manually applying the change.
- routers/web/auth/oauth.go
Technically not a conflict, but the original PR removed the
modules/util import, which in our version, is still in use. Added it
back.
These changes were missed when cherry-picking the following
c9d0e63c202827756c637d9ca7bbde685c1984b7 Remove unnecessary "Str2html" modifier from templates (#29319)
Fixes: https://codeberg.org/forgejo/forgejo/issues/3623
Do not try to create a new authorization grant when one exists already,
thus preventing a DB-related authorization issue.
Fix https://github.com/go-gitea/gitea/pull/30790#issuecomment-2118812426
---------
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
(cherry picked from commit 9c8c9ff6d10b35de8d2d7eae0fc2646ad9bbe94a)
This commit forces the resource owner (user) to always approve OAuth 2.0
authorization requests if the client is public (e.g. native
applications).
As detailed in [RFC 6749 Section 10.2](https://www.rfc-editor.org/rfc/rfc6749.html#section-10.2),
> The authorization server SHOULD NOT process repeated authorization
requests automatically (without active resource owner interaction)
without authenticating the client or relying on other measures to ensure
that the repeated request comes from the original client and not an
impersonator.
With the implementation prior to this patch, attackers with access to
the redirect URI (e.g., the loopback interface for
`git-credential-oauth`) can get access to the user account without any
user interaction if they can redirect the user to the
`/login/oauth/authorize` endpoint somehow (e.g., with `xdg-open` on
Linux).
Fixes #25061.
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
(cherry picked from commit 5c542ca94caa3587329167cfe9e949357ca15cf1)
A remote user (UserTypeRemoteUser) is a placeholder that can be
promoted to a regular user (UserTypeIndividual). It represents users
that exist somewhere else. Although the UserTypeRemoteUser already
exists in Forgejo, it is neither used or documented.
A new login type / source (Remote) is introduced and set to be the login type
of remote users.
Type UserTypeRemoteUser
LogingType Remote
The association between a remote user and its counterpart in another
environment (for instance another forge) is via the OAuth2 login
source:
LoginName set to the unique identifier relative to the login source
LoginSource set to the identifier of the remote source
For instance when migrating from GitLab.com, a user can be created as
if it was authenticated using GitLab.com as an OAuth2 authentication
source.
When a user authenticates to Forejo from the same authentication
source and the identifier match, the remote user is promoted to a
regular user. For instance if 43 is the ID of the GitLab.com OAuth2
login source, 88 is the ID of the Remote loging source, and 48323
is the identifier of the foo user:
Type UserTypeRemoteUser
LogingType Remote
LoginName 48323
LoginSource 88
Email (empty)
Name foo
Will be promoted to the following when the user foo authenticates to
the Forgejo instance using GitLab.com as an OAuth2 provider. All users
with a LoginType of Remote and a LoginName of 48323 are examined. If
the LoginSource has a provider name that matches the provider name of
GitLab.com (usually just "gitlab"), it is a match and can be promoted.
The email is obtained via the OAuth2 provider and the user set to:
Type UserTypeIndividual
LogingType OAuth2
LoginName 48323
LoginSource 43
Email foo@example.com
Name foo
Note: the Remote login source is an indirection to the actual login
source, i.e. the provider string my be set to a login source that does
not exist yet.
`log.Xxx("%v")` is not ideal, this PR adds necessary context messages.
Remove some unnecessary logs.
Co-authored-by: Giteabot <teabot@gitea.io>
(cherry picked from commit 83f83019ef3471b847a300f0821499b3896ec987)
Conflicts:
- modules/util/util.go
Conflict resolved by picking `util.Iif` from 654cfd1dfbd3f3f1d94addee50b6fe2b018a49c3
Related to #2773
Related to Refactor URL detection [gitea#29960](https://github.com/go-gitea/gitea/pull/29960)
Related to Refactor external URL detection [gitea#29973](https://github.com/go-gitea/gitea/pull/29973)
I added a bunch of tests to `httplib.TestIsRiskyRedirectURL` and some cases should be better handled (however it is not an easy task).
I also ported the removal of `utils.IsExternalURL`, since it prevents duplicated (subtle) code.
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/3167
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: oliverpool <git@olivier.pfad.fr>
Co-committed-by: oliverpool <git@olivier.pfad.fr>
Since `modules/context` has to depend on `models` and many other
packages, it should be moved from `modules/context` to
`services/context` according to design principles. There is no logic
code change on this PR, only move packages.
- Move `code.gitea.io/gitea/modules/context` to
`code.gitea.io/gitea/services/context`
- Move `code.gitea.io/gitea/modules/contexttest` to
`code.gitea.io/gitea/services/contexttest` because of depending on
context
- Move `code.gitea.io/gitea/modules/upload` to
`code.gitea.io/gitea/services/context/upload` because of depending on
context
(cherry picked from commit 29f149bd9f517225a3c9f1ca3fb0a7b5325af696)
Conflicts:
routers/api/packages/alpine/alpine.go
routers/api/v1/repo/issue_reaction.go
routers/install/install.go
routers/web/admin/config.go
routers/web/passkey.go
routers/web/repo/search.go
routers/web/repo/setting/default_branch.go
routers/web/user/home.go
routers/web/user/profile.go
tests/integration/editor_test.go
tests/integration/integration_test.go
tests/integration/mirror_push_test.go
trivial context conflicts
also modified all other occurrences in Forgejo specific files
Follow #29165.
* Introduce JSONTemplate to help to render JSON templates
* Introduce JSEscapeSafe for templates. Now only use `{{ ... |
JSEscape}}` instead of `{{ ... | JSEscape | Safe}}`
* Simplify "UserLocationMapURL" useage
(cherry picked from commit 31bb9f3247388b993c61a10190cfd512408ce57e)
Clarify when "string" should be used (and be escaped), and when
"template.HTML" should be used (no need to escape)
And help PRs like #29059 , to render the error messages correctly.
(cherry picked from commit f3eb835886031df7a562abc123c3f6011c81eca8)
Conflicts:
modules/web/middleware/binding.go
routers/web/feed/convert.go
tests/integration/branches_test.go
tests/integration/repo_branch_test.go
trivial context conflicts
During registration, one may be required to give their email address, to
be verified and activated later. However, if one makes a mistake, a
typo, they may end up with an account that cannot be activated due to
having a wrong email address.
They can still log in, but not change the email address, thus, no way to
activate it without help from an administrator.
To remedy this issue, lets allow changing the email address for logged
in, but not activated users.
This fixes gitea#17785.
Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
(cherry picked from commit aaaece28e4)
(cherry picked from commit 639dafabec)
(cherry picked from commit d699c12ceb)
[GITEA] Allow changing the email address before activation (squash) cache is always active
This needs to be revisited because the MailResendLimit is not enforced
and turns out to not be tested.
See e7cb8da2a8 * Always enable caches (#28527)
(cherry picked from commit 43ded8ee30)
Rate limit pre-activation email change separately
Changing the email address before any email address is activated should
be subject to a different rate limit than the normal activation email
resending. If there's only one rate limit for both, then if a newly
signed up quickly discovers they gave a wrong email address, they'd have
to wait three minutes to change it.
With the two separate limits, they don't - but they'll have to wait
three minutes before they can change the email address again.
The downside of this setup is that a malicious actor can alternate
between resending and changing the email address (to something like
`user+$idx@domain`, delivered to the same inbox) to effectively halving
the rate limit. I do not think there's a better solution, and this feels
like such a small attack surface that I'd deem it acceptable.
The way the code works after this change is that `ActivatePost` will now
check the `MailChangeLimit_user` key rather than `MailResendLimit_user`,
and if we're within the limit, it will set `MailChangedJustNow_user`. The
`Activate` method - which sends the activation email, whether it is a
normal resend, or one following an email change - will check
`MailChangedJustNow_user`, and if it is set, it will check the rate
limit against `MailChangedLimit_user`, otherwise against
`MailResendLimit_user`, and then will delete the
`MailChangedJustNow_user` key from the cache.
Fixes #2040.
Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
(cherry picked from commit e35d2af2e5)
(cherry picked from commit 03989418a7)
(cherry picked from commit f50e0dfe5e)
(cherry picked from commit cad9184a36)
(cherry picked from commit e2da5d7fe1)
(cherry picked from commit 3a80534d4d)
Sends email with information on the new user (time of creation and time of last sign-in) and a link to manage the new user from the admin panel
closes: https://codeberg.org/forgejo/forgejo/issues/480
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/1371
Co-authored-by: Aravinth Manivannan <realaravinth@batsense.net>
Co-committed-by: Aravinth Manivannan <realaravinth@batsense.net>
(cherry picked from commit c721aa828b)
(cherry picked from commit 6487efcb9d)
Conflicts:
modules/notification/base/notifier.go
modules/notification/base/null.go
modules/notification/notification.go
https://codeberg.org/forgejo/forgejo/pulls/1422
(cherry picked from commit 7ea66ee1c5)
Conflicts:
services/notify/notifier.go
services/notify/notify.go
services/notify/null.go
https://codeberg.org/forgejo/forgejo/pulls/1469
(cherry picked from commit 7d2d997011)
(cherry picked from commit 435a54f140)
(cherry picked from commit 8ec7b3e448)
[GITEA] notifies admins on new user registration (squash) performance bottleneck
Refs: https://codeberg.org/forgejo/forgejo/issues/1479
(cherry picked from commit 97ac9147ff)
(cherry picked from commit 19f295c16b)
(cherry picked from commit 3367dcb2cf)
[GITEA] notifies admins on new user registration (squash) cosmetic changes
Co-authored-by: delvh <dev.lh@web.de>
(cherry picked from commit 9f1670e040)
(cherry picked from commit de5bb2a224)
(cherry picked from commit 8f8e52f31a)
(cherry picked from commit e0d5130312)
(cherry picked from commit f1288d6d9b)
(cherry picked from commit 1db4736fd7)
(cherry picked from commit e8dcbb6cd6)
(cherry picked from commit 09625d6476)
[GITEA] notifies admins on new user registration (squash) ctx.Locale
(cherry picked from commit dab7212fad)
(cherry picked from commit 9b7bbae8c4)
(cherry picked from commit f750b71d3d)
(cherry picked from commit f79af36679)
(cherry picked from commit e76eee334e)
[GITEA] notifies admins on new user registration (squash) fix locale
(cherry picked from commit 54cd100d8d)
(cherry picked from commit 053dbd3d50)
[GITEA] notifies admins on new user registration (squash) fix URL
1. Use absolute URL in the admin panel link sent on new registrations
2. Include absolute URL of the newly signed-up user's profile.
New email looks like this:
<details><summary>Please click to expand</summary>
```
--153937b1864f158f4fd145c4b5d4a513568681dd489021dd466a8ad7b770
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain; charset=UTF-8
User Information: @realaravinth ( http://localhost:3000/realaravinth )
----------------------------------------------------------------------
* Created: 2023-12-13 19:36:50 +05:30
Please click here ( http://localhost:3000/admin/users/9 ) to manage the use=
r from the admin panel.
--153937b1864f158f4fd145c4b5d4a513568681dd489021dd466a8ad7b770
Content-Transfer-Encoding: quoted-printable
Content-Type: text/html; charset=UTF-8
<!DOCTYPE html>
<html>
<head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8">
<title>New user realaravinth just signed up</title>
<style>
blockquote { padding-left: 1em; margin: 1em 0; border-left: 1px solid gre=
y; color: #777}
.footer { font-size:small; color:#666;}
</style>
</head>
<body>
<ul>
<h3>User Information: <a href=3D"http://localhost:3000/realaravinth">@rea=
laravinth</a></h3>
<li>Created: <relative-time format=3D"datetime" weekday=3D"" year=3D"nume=
ric" month=3D"short" day=3D"numeric" hour=3D"numeric" minute=3D"numeric" se=
cond=3D"numeric" datetime=3D"2023-12-13T19:36:50+05:30">2023-12-13 19:36:50=
+05:30</relative-time></li>
</ul>
<p> Please <a href=3D"http://localhost:3000/admin/users/9" rel=3D"nofollow=
">click here</a> to manage the user from the admin panel. </p>
</body>
</html>
--153937b1864f158f4fd145c4b5d4a513568681dd489021dd466a8ad7b770--
```
</details>
fixes: https://codeberg.org/forgejo/forgejo/issues/1927
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/1940
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Aravinth Manivannan <realaravinth@batsense.net>
Co-committed-by: Aravinth Manivannan <realaravinth@batsense.net>
(cherry picked from commit b8d764e36a)
(cherry picked from commit d48b84f623)
Conflicts:
routers/web/auth/auth.go
https://codeberg.org/forgejo/forgejo/pulls/2034
(cherry picked from commit 02d3c125cc)
(cherry picked from commit 367374ecc3)
Conflicts:
models/user/user_test.go
https://codeberg.org/forgejo/forgejo/pulls/2119
(cherry picked from commit 4124fa5aa4)
(cherry picked from commit 7f12610ff6)
[GITEA] notifies admins on new user registration (squash) DeleteByID
trivial conflict because of
778ad795fd Refactor deletion (#28610)
(cherry picked from commit 05682614e5)
(cherry picked from commit 64bd374803)
(cherry picked from commit 63d086f666)
(cherry picked from commit 3cd48ef4d5)
Conflicts:
options/locale/locale_en-US.ini
https://codeberg.org/forgejo/forgejo/pulls/2249
(cherry picked from commit 6578ec4ed6)
Conflicts:
routers/web/auth/auth.go
https://codeberg.org/forgejo/forgejo/pulls/2300
- This is a 'front-port' of the already existing patch on v1.21 and
v1.20, but applied on top of what Gitea has done to rework the LTA
mechanism. Forgejo will stick with the reworked mechanism by the Forgejo
Security team for the time being. The removal of legacy code (AES-GCM) has been
left out.
- The current architecture is inherently insecure, because you can
construct the 'secret' cookie value with values that are available in
the database. Thus provides zero protection when a database is
dumped/leaked.
- This patch implements a new architecture that's inspired from: [Paragonie Initiative](https://paragonie.com/blog/2015/04/secure-authentication-php-with-long-term-persistence#secure-remember-me-cookies).
- Integration testing is added to ensure the new mechanism works.
- Removes a setting, because it's not used anymore.
(cherry picked from commit e3d6622a63)
(cherry picked from commit fef1a6dac5)
(cherry picked from commit b0c5165145)
(cherry picked from commit 7ad51b9f8d)
(cherry picked from commit 64f053f383)
(cherry picked from commit f5e78e4c20)
Conflicts:
services/auth/auth_token_test.go
https://codeberg.org/forgejo/forgejo/pulls/2069
(cherry picked from commit f69fc23d4b)
(cherry picked from commit d955ab3ab0)
(cherry picked from commit 9220088f90)
(cherry picked from commit c73ac63696)
(cherry picked from commit 747a176048)
Conflicts:
models/user/user.go
routers/web/user/setting/account.go
https://codeberg.org/forgejo/forgejo/pulls/2295
Fixes #28660
Fixes an admin api bug related to `user.LoginSource`
Fixed `/user/emails` response not identical to GitHub api
This PR unifies the user update methods. The goal is to keep the logic
only at one place (having audit logs in mind). For example, do the
password checks only in one method not everywhere a password is updated.
After that PR is merged, the user creation should be next.
Nowadays, cache will be used on almost everywhere of Gitea and it cannot
be disabled, otherwise some features will become unaviable.
Then I think we can just remove the option for cache enable. That means
cache cannot be disabled.
But of course, we can still use cache configuration to set how should
Gitea use the cache.
The steps to reproduce it.
First, create a new oauth2 source.
Then, a user login with this oauth2 source.
Disable the oauth2 source.
Visit users -> settings -> security, 500 will be displayed.
This is because this page only load active Oauth2 sources but not all
Oauth2 sources.
Closes #27455
> The mechanism responsible for long-term authentication (the 'remember
me' cookie) uses a weak construction technique. It will hash the user's
hashed password and the rands value; it will then call the secure cookie
code, which will encrypt the user's name with the computed hash. If one
were able to dump the database, they could extract those two values to
rebuild that cookie and impersonate a user. That vulnerability exists
from the date the dump was obtained until a user changed their password.
>
> To fix this security issue, the cookie could be created and verified
using a different technique such as the one explained at
https://paragonie.com/blog/2015/04/secure-authentication-php-with-long-term-persistence#secure-remember-me-cookies.
The PR removes the now obsolete setting `COOKIE_USERNAME`.
This PR removed `unittest.MainTest` the second parameter
`TestOptions.GiteaRoot`. Now it detects the root directory by current
working directory.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Part of #27065
This reduces the usage of `db.DefaultContext`. I think I've got enough
files for the first PR. When this is merged, I will continue working on
this.
Considering how many files this PR affect, I hope it won't take to long
to merge, so I don't end up in the merge conflict hell.
---------
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
## Changes
- Forces flashed error to render immediately when forgot password code
is incorrect or has expired.
- Adds a link back to the `forgot_password` page so that the user can
restart the process (in the event that their link has expired)
Before:
* `{{.locale.Tr ...}}`
* `{{$.locale.Tr ...}}`
* `{{$.root.locale.Tr ...}}`
* `{{template "sub" .}}`
* `{{template "sub" (dict "locale" $.locale)}}`
* `{{template "sub" (dict "root" $)}}`
* .....
With context function: only need to `{{ctx.Locale.Tr ...}}`
The "ctx" could be considered as a super-global variable for all
templates including sub-templates.
To avoid potential risks (any bug in the template context function
package), this PR only starts using "ctx" in "head.tmpl" and
"footer.tmpl" and it has a "DataRaceCheck". If there is anything wrong,
the code can be fixed or reverted easily.
The JSONRedirect/JSONOK/JSONError functions were put into "Base" context
incorrectly, it would cause abuse.
Actually, they are for "web context" only, so, move them to the correct
place.
And by the way, use them to simplify old code: +75 -196
