Fix context usage (#33554) (#33557)

Backport #33554

Author: wxiaoguang

Diff for: routers/web/web.go

@@ -1635,7 +1635,7 @@ func registerRoutes(m *web.Router) {
 	}
 
 	m.NotFound(func(w http.ResponseWriter, req *http.Request) {
-		ctx := context.GetWebContext(req)
+		ctx := context.GetWebContext(req.Context())
 		routing.UpdateFuncInfo(ctx, routing.GetFuncInfo(ctx.NotFound, "WebNotFound"))
 		ctx.NotFound("", nil)
 	})

Diff for: services/auth/auth.go

@@ -104,7 +104,7 @@ func handleSignIn(resp http.ResponseWriter, req *http.Request, sess SessionStore
 	middleware.SetLocaleCookie(resp, user.Language, 0)
 
 	// force to generate a new CSRF token
-	if ctx := gitea_context.GetWebContext(req); ctx != nil {
+	if ctx := gitea_context.GetWebContext(req.Context()); ctx != nil {
 		ctx.Csrf.PrepareForSessionUser(ctx)
 	}
 }

Diff for: services/auth/sspi.go

@@ -89,7 +89,7 @@ func (s *SSPI) Verify(req *http.Request, w http.ResponseWriter, store DataStore,
 		store.GetData()["EnableSSPI"] = true
 		// in this case, the Verify function is called in Gitea's web context
 		// FIXME: it doesn't look good to render the page here, why not redirect?
-		gitea_context.GetWebContext(req).HTML(http.StatusUnauthorized, tplSignIn)
+		gitea_context.GetWebContext(req.Context()).HTML(http.StatusUnauthorized, tplSignIn)
 		return nil, err
 	}
 	if outToken != "" {

Diff for: services/context/context.go

@@ -77,9 +77,9 @@ type webContextKeyType struct{}
 
 var WebContextKey = webContextKeyType{}
 
-func GetWebContext(req *http.Request) *Context {
-	ctx, _ := req.Context().Value(WebContextKey).(*Context)
-	return ctx
+func GetWebContext(ctx context.Context) *Context {
+	webCtx, _ := ctx.Value(WebContextKey).(*Context)
+	return webCtx
 }
 
 // ValidateContext is a special context for form validation middleware. It may be different from other contexts.
@@ -133,6 +133,7 @@ func NewWebContext(base *Base, render Render, session session.Store) *Context {
 	}
 	ctx.TemplateContext = NewTemplateContextForWeb(ctx)
 	ctx.Flash = &middleware.Flash{DataStore: ctx, Values: url.Values{}}
+	ctx.AppendContextValue(WebContextKey, ctx)
 	return ctx
 }
 

Diff for: services/markup/processorhelper.go

@@ -20,8 +20,8 @@ func ProcessorHelper() *markup.RenderHelperFuncs {
 				return false
 			}
 
-			giteaCtx, ok := ctx.(*gitea_context.Context)
-			if !ok {
+			giteaCtx := gitea_context.GetWebContext(ctx)
+			if giteaCtx == nil {
 				// when using general context, use user's visibility to check
 				return mentionedUser.Visibility.IsPublic()
 			}

Diff for: services/markup/processorhelper_codepreview.go

@@ -35,8 +35,8 @@ func renderRepoFileCodePreview(ctx context.Context, opts markup.RenderCodePrevie
 		return "", err
 	}
 
-	webCtx, ok := ctx.Value(gitea_context.WebContextKey).(*gitea_context.Context)
-	if !ok {
+	webCtx := gitea_context.GetWebContext(ctx)
+	if webCtx == nil {
 		return "", fmt.Errorf("context is not a web context")
 	}
 	doer := webCtx.Doer