Update go-chi/session (fixes "race" in tests) (#17031)

Update to latest go-chi/session where the NewManager causes a new
Provider instantiation instead of reconfiguring an old one.
(https://gitea.com/go-chi/session/pulls/1)

The NewManager call is now concurrency safe and would allow live
reconfiguration in future but for now this PR simply fixes an
intermittent "data-race" detected in our tests.  (See
https://drone.gitea.io/go-gitea/gitea/43900/2/14)

Related #17027
Related #1441

Signed-off-by: Andrew Thornton <art27@cantab.net>

4 files changed, 30 insertions, 9 deletions

diff --git a/go.mod b/go.mod
index ed557a30ab..c2a73073a1 100644
--- a/go.mod
+++ b/go.mod
@@ -9,7 +9,7 @@ require (
 	gitea.com/go-chi/binding v0.0.0-20210301195521-1fe1c9a555e7
 	gitea.com/go-chi/cache v0.0.0-20210110083709-82c4c9ce2d5e
 	gitea.com/go-chi/captcha v0.0.0-20210110083842-e7696c336a1e
-	gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee
+	gitea.com/go-chi/session v0.0.0-20210913064732-2ac132b0fa07
 	gitea.com/lunny/levelqueue v0.4.1
 	github.com/Microsoft/go-winio v0.5.0 // indirect
 	github.com/NYTimes/gziphandler v1.1.1
diff --git a/go.sum b/go.sum
index a76bfc8a4a..4d7a19ec29 100644
--- a/go.sum
+++ b/go.sum
@@ -47,8 +47,8 @@ gitea.com/go-chi/cache v0.0.0-20210110083709-82c4c9ce2d5e h1:zgPGaf3kXP0cVm9J0l8
 gitea.com/go-chi/cache v0.0.0-20210110083709-82c4c9ce2d5e/go.mod h1:k2V/gPDEtXGjjMGuBJiapffAXTv76H4snSmlJRLUhH0=
 gitea.com/go-chi/captcha v0.0.0-20210110083842-e7696c336a1e h1:YjaQU6XFicdhPN+MlGolcXO8seYY2+EY5g7vZPB17CQ=
 gitea.com/go-chi/captcha v0.0.0-20210110083842-e7696c336a1e/go.mod h1:nfA7JaGv3hbGQ1ktdhAsZhdS84qKffI8NMlHr+Opsog=
-gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee h1:9U6HuKUBt/cGK6T/64dEuz0r7Yp97WAAEJvXHDlY3ws=
-gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee/go.mod h1:Ozg8IchVNb/Udg+ui39iHRYqVHSvf3C99ixdpLR8Vu0=
+gitea.com/go-chi/session v0.0.0-20210913064732-2ac132b0fa07 h1:1xF0xbIgDWnBB0iURAUFCoac4KfhGDdI7y7+3/8I8i4=
+gitea.com/go-chi/session v0.0.0-20210913064732-2ac132b0fa07/go.mod h1:Ozg8IchVNb/Udg+ui39iHRYqVHSvf3C99ixdpLR8Vu0=
 gitea.com/lunny/levelqueue v0.4.1 h1:RZ+AFx5gBsZuyqCvofhAkPQ9uaVDPJnsULoJZIYaJNw=
 gitea.com/lunny/levelqueue v0.4.1/go.mod h1:HBqmLbz56JWpfEGG0prskAV97ATNRoj5LDmPicD22hU=
 gitea.com/xorm/sqlfiddle v0.0.0-20180821085327-62ce714f951a h1:lSA0F4e9A2NcQSqGqTOXqu2aRi/XEQxDCBwM8yJtE6s=
diff --git a/vendor/gitea.com/go-chi/session/session.go b/vendor/gitea.com/go-chi/session/session.go
index 475612ffb1..5c2afedc93 100644
--- a/vendor/gitea.com/go-chi/session/session.go
+++ b/vendor/gitea.com/go-chi/session/session.go
@@ -23,6 +23,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"reflect"
 	"time"
 )
 
@@ -291,17 +292,34 @@ type Provider interface {
 	GC()
 }
 
-var providers = make(map[string]Provider)
+var providers = make(map[string]func() Provider)
 
 // Register registers a provider.
 func Register(name string, provider Provider) {
-	if provider == nil {
+	if reflect.TypeOf(provider).Kind() == reflect.Ptr {
+		// Pointer:
+		RegisterFn(name, func() Provider {
+			return reflect.New(reflect.ValueOf(provider).Elem().Type()).Interface().(Provider)
+		})
+		return
+	}
+
+	// Not a Pointer
+	RegisterFn(name, func() Provider {
+		return reflect.New(reflect.TypeOf(provider)).Elem().Interface().(Provider)
+	})
+}
+
+// RegisterFn registers a provider function.
+func RegisterFn(name string, providerfn func() Provider) {
+	if providerfn == nil {
 		panic("session: cannot register provider with nil value")
 	}
 	if _, dup := providers[name]; dup {
 		panic(fmt.Errorf("session: cannot register provider '%s' twice", name))
 	}
-	providers[name] = provider
+
+	providers[name] = providerfn
 }
 
 //    _____
@@ -318,12 +336,15 @@ type Manager struct {
 }
 
 // NewManager creates and returns a new session manager by given provider name and configuration.
-// It panics when given provider isn't registered.
+// It returns an error when requested provider name isn't registered.
 func NewManager(name string, opt Options) (*Manager, error) {
-	p, ok := providers[name]
+	fn, ok := providers[name]
 	if !ok {
 		return nil, fmt.Errorf("session: unknown provider '%s'(forgotten import?)", name)
 	}
+
+	p := fn()
+
 	return &Manager{p, opt}, p.Init(opt.Maxlifetime, opt.ProviderConfig)
 }
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 67646b0b73..853286cdaa 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -18,7 +18,7 @@ gitea.com/go-chi/cache/memcache
 # gitea.com/go-chi/captcha v0.0.0-20210110083842-e7696c336a1e
 ## explicit
 gitea.com/go-chi/captcha
-# gitea.com/go-chi/session v0.0.0-20210108030337-0cb48c5ba8ee
+# gitea.com/go-chi/session v0.0.0-20210913064732-2ac132b0fa07
 ## explicit
 gitea.com/go-chi/session
 gitea.com/go-chi/session/couchbase