diff --git a/src/handlers/docker.go b/src/handlers/docker.go
index eb89a35..39dc554 100644
--- a/src/handlers/docker.go
+++ b/src/handlers/docker.go
@@ -274,7 +274,9 @@ func handleBlobRequest(c *gin.Context, imageRef, digest string) {
 	c.Header("Docker-Content-Digest", digest)
 
 	c.Status(http.StatusOK)
-	io.Copy(c.Writer, reader)
+	if _, err := io.Copy(c.Writer, reader); err != nil {
+		fmt.Printf("复制layer内容失败: %v\n", err)
+	}
 }
 
 // handleTagsRequest 处理tags列表请求
@@ -416,7 +418,9 @@ func proxyDockerAuthOriginal(c *gin.Context) {
 	}
 
 	c.Status(resp.StatusCode)
-	io.Copy(c.Writer, resp.Body)
+	if _, err := io.Copy(c.Writer, resp.Body); err != nil {
+		fmt.Printf("复制认证响应失败: %v\n", err)
+	}
 }
 
 // rewriteAuthHeader 重写认证头
@@ -569,7 +573,9 @@ func handleUpstreamBlobRequest(c *gin.Context, imageRef, digest string, mapping
 	c.Header("Docker-Content-Digest", digest)
 
 	c.Status(http.StatusOK)
-	io.Copy(c.Writer, reader)
+	if _, err := io.Copy(c.Writer, reader); err != nil {
+		fmt.Printf("复制layer内容失败: %v\n", err)
+	}
 }
 
 // handleUpstreamTagsRequest 处理上游Registry的tags请求
diff --git a/src/handlers/github.go b/src/handlers/github.go
index d845851..8697118 100644
--- a/src/handlers/github.go
+++ b/src/handlers/github.go
@@ -227,6 +227,8 @@ func proxyGitHubWithRedirect(c *gin.Context, u string, redirectCount int) {
 		c.Status(resp.StatusCode)
 
 		// 直接流式转发
-		io.Copy(c.Writer, resp.Body)
+		if _, err := io.Copy(c.Writer, resp.Body); err != nil {
+			fmt.Printf("转发响应体失败: %v\n", err)
+		}
 	}
 }
diff --git a/src/handlers/search.go b/src/handlers/search.go
index 7c2ec2a..7deaebc 100644
--- a/src/handlers/search.go
+++ b/src/handlers/search.go
@@ -7,7 +7,6 @@ import (
 	"io"
 	"net/http"
 	"net/url"
-	"sort"
 	"strings"
 	"sync"
 	"time"
@@ -160,51 +159,6 @@ func init() {
 	}()
 }
 
-func filterSearchResults(results []Repository, query string) []Repository {
-	searchTerm := strings.ToLower(strings.TrimPrefix(query, "library/"))
-	filtered := make([]Repository, 0)
-
-	for _, repo := range results {
-		repoName := strings.ToLower(repo.Name)
-		repoDesc := strings.ToLower(repo.Description)
-
-		score := 0
-
-		if repoName == searchTerm {
-			score += 100
-		}
-
-		if strings.HasPrefix(repoName, searchTerm) {
-			score += 50
-		}
-
-		if strings.Contains(repoName, searchTerm) {
-			score += 30
-		}
-
-		if strings.Contains(repoDesc, searchTerm) {
-			score += 10
-		}
-
-		if repo.IsOfficial {
-			score += 20
-		}
-
-		if score > 0 {
-			filtered = append(filtered, repo)
-		}
-	}
-
-	sort.Slice(filtered, func(i, j int) bool {
-		if filtered[i].IsOfficial != filtered[j].IsOfficial {
-			return filtered[i].IsOfficial
-		}
-		return filtered[i].PullCount > filtered[j].PullCount
-	})
-
-	return filtered
-}
-
 // normalizeRepository 统一规范化仓库信息
 func normalizeRepository(repo *Repository) {
 	if repo.IsOfficial {
@@ -487,10 +441,14 @@ func parsePaginationParams(c *gin.Context, defaultPageSize int) (page, pageSize
 	pageSize = defaultPageSize
 
 	if p := c.Query("page"); p != "" {
-		fmt.Sscanf(p, "%d", &page)
+		if _, err := fmt.Sscanf(p, "%d", &page); err != nil {
+			fmt.Printf("解析page参数失败: %v\n", err)
+		}
 	}
 	if ps := c.Query("page_size"); ps != "" {
-		fmt.Sscanf(ps, "%d", &pageSize)
+		if _, err := fmt.Sscanf(ps, "%d", &pageSize); err != nil {
+			fmt.Printf("解析page_size参数失败: %v\n", err)
+		}
 	}
 
 	return page, pageSize
diff --git a/src/utils/access_control.go b/src/utils/access_control.go
index 9912276..d676177 100644
--- a/src/utils/access_control.go
+++ b/src/utils/access_control.go
@@ -2,7 +2,6 @@ package utils
 
 import (
 	"strings"
-	"sync"
 
 	"hubproxy/config"
 )
@@ -17,7 +16,6 @@ const (
 
 // AccessController 统一访问控制器
 type AccessController struct {
-	mu sync.RWMutex
 }
 
 // DockerImageInfo Docker镜像信息
diff --git a/src/utils/ratelimiter.go b/src/utils/ratelimiter.go
index 0658ff6..3512cc9 100644
--- a/src/utils/ratelimiter.go
+++ b/src/utils/ratelimiter.go
@@ -176,8 +176,9 @@ func (i *IPRateLimiter) GetLimiter(ip string) (*rate.Limiter, bool) {
 
 	now := time.Now()
 
+	var entry *rateLimiterEntry
 	i.mu.RLock()
-	entry, exists := i.ips[normalizedIP]
+	_, exists := i.ips[normalizedIP]
 	i.mu.RUnlock()
 
 	if exists {