Fix the permission check for user search API and limit the number of returned users for `/user/search` (#32310)

Partially backport #32288

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

routers/api/v1/api.go

@@ -356,12 +356,20 @@ func reqToken() func(ctx *context.APIContext) {
 
 func reqExploreSignIn() func(ctx *context.APIContext) {
 	return func(ctx *context.APIContext) {
-		if setting.Service.Explore.RequireSigninView && !ctx.IsSigned {
+		if (setting.Service.RequireSignInView || setting.Service.Explore.RequireSigninView) && !ctx.IsSigned {
 			ctx.Error(http.StatusUnauthorized, "reqExploreSignIn", "you must be signed in to search for users")
 		}
 	}
 }
 
+func reqUsersExploreEnabled() func(ctx *context.APIContext) {
+	return func(ctx *context.APIContext) {
+		if setting.Service.Explore.DisableUsersPage {
+			ctx.NotFound()
+		}
+	}
+}
+
 func reqBasicOrRevProxyAuth() func(ctx *context.APIContext) {
 	return func(ctx *context.APIContext) {
 		if ctx.IsSigned && setting.Service.EnableReverseProxyAuthAPI && ctx.Data["AuthedMethod"].(string) == auth.ReverseProxyMethodName {
@@ -955,7 +963,7 @@ func Routes() *web.Route {
 
 		// Users (requires user scope)
 		m.Group("/users", func() {
-			m.Get("/search", reqExploreSignIn(), user.Search)
+			m.Get("/search", reqExploreSignIn(), reqUsersExploreEnabled(), user.Search)
 
 			m.Group("/{username}", func() {
 				m.Get("", reqExploreSignIn(), user.GetInfo)

routers/web/user/search.go

@@ -8,37 +8,24 @@ import (
 
 	"code.gitea.io/gitea/models/db"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/optional"
+	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/services/context"
 	"code.gitea.io/gitea/services/convert"
 )
 
-// Search search users
-func Search(ctx *context.Context) {
-	listOptions := db.ListOptions{
-		Page:     ctx.FormInt("page"),
-		PageSize: convert.ToCorrectPageSize(ctx.FormInt("limit")),
-	}
-
-	users, maxResults, err := user_model.SearchUsers(ctx, &user_model.SearchUserOptions{
+// SearchCandidates searches candidate users for dropdown list
+func SearchCandidates(ctx *context.Context) {
+	users, _, err := user_model.SearchUsers(ctx, &user_model.SearchUserOptions{
 		Actor:       ctx.Doer,
 		Keyword:     ctx.FormTrim("q"),
-		UID:         ctx.FormInt64("uid"),
 		Type:        user_model.UserTypeIndividual,
-		IsActive:    ctx.FormOptionalBool("active"),
-		ListOptions: listOptions,
+		IsActive:    optional.Some(true),
+		ListOptions: db.ListOptions{PageSize: setting.UI.MembersPagingNum},
 	})
 	if err != nil {
-		ctx.JSON(http.StatusInternalServerError, map[string]any{
-			"ok":    false,
-			"error": err.Error(),
-		})
+		ctx.ServerError("Unable to search users", err)
 		return
 	}
-
-	ctx.SetTotalCountHeader(maxResults)
-
-	ctx.JSON(http.StatusOK, map[string]any{
-		"ok":   true,
-		"data": convert.ToUsers(ctx, ctx.Doer, users),
-	})
+	ctx.JSON(http.StatusOK, map[string]any{"data": convert.ToUsers(ctx, ctx.Doer, users)})
 }

routers/web/web.go

@@ -668,7 +668,7 @@ func registerRoutes(m *web.Route) {
 		m.Post("/forgot_password", auth.ForgotPasswdPost)
 		m.Post("/logout", auth.SignOut)
 		m.Get("/stopwatches", reqSignIn, user.GetStopwatches)
-		m.Get("/search", ignExploreSignIn, user.Search)
+		m.Get("/search_candidates", ignExploreSignIn, user.SearchCandidates)
 		m.Group("/oauth2", func() {
 			m.Get("/{provider}", auth.SignInOAuth)
 			m.Get("/{provider}/callback", auth.SignInOAuthCallback)

web_src/js/features/comp/SearchUserBox.js

@@ -8,41 +8,38 @@ export function initCompSearchUserBox() {
   const searchUserBox = document.getElementById('search-user-box');
   if (!searchUserBox) return;
 
-  const $searchUserBox = $(searchUserBox);
   const allowEmailInput = searchUserBox.getAttribute('data-allow-email') === 'true';
   const allowEmailDescription = searchUserBox.getAttribute('data-allow-email-description') ?? undefined;
-  $searchUserBox.search({
+  $(searchUserBox).search({
     minCharacters: 2,
     apiSettings: {
-      url: `${appSubUrl}/user/search?active=1&q={query}`,
+      url: `${appSubUrl}/user/search_candidates?q={query}`,
       onResponse(response) {
-        const items = [];
-        const searchQuery = $searchUserBox.find('input').val();
+        const resultItems = [];
+        const searchQuery = searchUserBox.querySelector('input').value;
         const searchQueryUppercase = searchQuery.toUpperCase();
-        $.each(response.data, (_i, item) => {
+        for (const item of response.data) {
           const resultItem = {
             title: item.login,
             image: item.avatar_url,
+            description: htmlEscape(item.full_name),
           };
-          if (item.full_name) {
-            resultItem.description = htmlEscape(item.full_name);
-          }
           if (searchQueryUppercase === item.login.toUpperCase()) {
-            items.unshift(resultItem);
+            resultItems.unshift(resultItem); // add the exact match to the top
           } else {
-            items.push(resultItem);
+            resultItems.push(resultItem);
+          }
         }
-        });
 
-        if (allowEmailInput && !items.length && looksLikeEmailAddressCheck.test(searchQuery)) {
+        if (allowEmailInput && !resultItems.length && looksLikeEmailAddressCheck.test(searchQuery)) {
           const resultItem = {
             title: searchQuery,
             description: allowEmailDescription,
           };
-          items.push(resultItem);
+          resultItems.push(resultItem);
         }
 
-        return {results: items};
+        return {results: resultItems};
       },
     },
     searchFields: ['login', 'full_name'],