Makes `pkg/web` only accept handles from the following set:
```go
handlerStd = func(http.ResponseWriter, *http.Request)
handlerStdCtx = func(http.ResponseWriter, *http.Request, *web.Context)
handlerStdReqCtx = func(http.ResponseWriter, *http.Request, *models.ReqContext)
handlerReqCtx = func(*models.ReqContext)
handlerReqCtxRes = func(*models.ReqContext) Response
handlerCtx = func(*web.Context)
```
This is a first step to reducing above set to only `http.Handler`.
---
Due to a cyclic import situation between `pkg/models` and `pkg/web`, parts of this PR were put into `pkg/api/response`, even though they definitely do not belong there. This however is _temporary_ until we untangle `models.ReqContext`.
* Multi-LDAP: Do not fail-fast on invalid credentials
When configuring LDAP authentication, it is very common to have multiple
servers configured. When using user bind (authenticating with LDAP using
the same credentials as the user authenticating to Grafana) we don't
expect all the users to be on all LDAP servers.
Because of this use-case, we should not fail-fast when authenticating on
multiple LDAP server configurations. Instead, we should continue to try
the credentials with the next LDAP server configured.
Fixes#19066
* LDAP: Add API endpoint to query the LDAP server(s) status|
This endpoint returns the current status(es) of the configured LDAP server(s).
The status of each server is verified by dialling and if no error is returned we assume the server is operational.
This is the last piece I'll produce as an API before moving into #18759 and see the view come to life.
* Move the ReloadLDAPCfg function to the debug file
Appears to be a better suite place for this.
* LDAP: Return the server information when we find a specific user
We allow you to specify multiple LDAP servers as part of LDAP authentication integration. As part of searching for specific users, we need to understand from which server they come from. Returning the server configuration as part of the search will help us do two things:
- Understand in which server we found the user
- Have access the groups specified as part of the server configuration
* LDAP: Adds the /api/admin/ldap/:username endpoint
This endpoint returns a user found within the configured LDAP server(s). Moreso, it provides the mapping information for the user to help administrators understand how the users would be created within Grafana based on the current configuration.
No changes are executed or saved to the database, this is all an in-memory representation of how the final result would look like.
It seems `ldap` module introduced new error type of which
multildap module didn't know about.
This broke the multildap login logic
Fixes#18491
Ref #18587
* LDAP: use only one struct
* Use only models.ExternalUserInfo
* Add additional helper method :/
* Move all the helpers to one module
* LDAP: refactoring
* Rename some of the public methods and change their behaviour
* Remove outdated methods
* Simplify logic
* More tests
There is no and never were tests for settings.go, added tests for helper
methods (cover is now about 100% for them). Added tests for the main
LDAP logic, but there is some stuff to add. Dial() is not tested and not
decoupled. It might be a challenge to do it properly
* Restructure tests:
* they wouldn't depend on external modules
* more consistent naming
* logical division
* More guards for erroneous paths
* Login: make login service an explicit dependency
* LDAP: remove no longer needed test helper fns
* LDAP: remove useless import
* LDAP: Use new interface in multildap module
* LDAP: corrections for the groups of multiple users
* In case there is several users their groups weren't detected correctly
* Simplify helpers module
* Removes Add/Remove methods
* Publicise necessary fields and methods so we could extend it
* Publicise mock API
* More comments and additional simplifications
* Sync with master
Still having low coverage :/ - should be addressed in #17208
* incapsulates multipleldap logic under one module
* abstracts users upsert and get logic
* changes some of the text error messages and import sort sequence
* heavily refactors the LDAP module – LDAP module now only deals with LDAP related behaviour
* integrates affected auth_proxy module and their tests
* refactoring of the auth_proxy logic
