chore: upgrade golangci-lint configuration and optimize codebase (#4236)

This PR includes the following changes:

- **Upgrade `.golangci.yml`**: Updated the configuration file to align
with the latest golangci-lint version, ensuring compatibility and
leveraging new features.
- **Refactor GitHub Action workflow**: Modified `golangci-lint.yml` in
the GitHub Actions workflow to reflect the updated configuration and
improve CI performance.
- **Codebase optimization**: Refactored code to address issues and
warnings raised by the updated golangci-lint rules, including:
  - Improved function length and complexity.
  - Enhanced error handling and variable naming conventions.
- Fixed minor issues such as unused imports and formatting
inconsistencies.

These changes aim to maintain code quality, ensure compatibility with
the latest tools, and improve overall maintainability.

net/gclient/gclient_request.go

@@ -371,7 +371,7 @@ func (c *Client) callRequest(req *http.Request) (resp *Response, err error) {
 			err = gerror.Wrapf(err, `request failed`)
 			// The response might not be nil when err != nil.
 			if resp.Response != nil {
-				_ = resp.Response.Body.Close()
+				_ = resp.Body.Close()
 			}
 			if c.retryCount > 0 {
 				c.retryCount--

net/gclient/gclient_response.go

@@ -57,7 +57,7 @@ func (r *Response) ReadAll() []byte {
 	if r == nil || r.Response == nil {
 		return []byte{}
 	}
-	body, err := io.ReadAll(r.Response.Body)
+	body, err := io.ReadAll(r.Body)
 	if err != nil {
 		intlog.Errorf(r.request.Context(), `%+v`, err)
 		return nil
@@ -82,5 +82,5 @@ func (r *Response) Close() error {
 	if r == nil || r.Response == nil {
 		return nil
 	}
-	return r.Response.Body.Close()
+	return r.Body.Close()
 }

net/ghttp/ghttp_request_param.go

@@ -184,7 +184,7 @@ func (r *Request) GetBodyString() string {
 // Note that the request content is read from request BODY, not from any field of FORM.
 func (r *Request) GetJson() (*gjson.Json, error) {
 	return gjson.LoadWithOptions(r.GetBody(), gjson.Options{
-		Type:      gjson.ContentTypeJson,
+		Type:      gjson.ContentTypeJSON,
 		StrNumber: true,
 	})
 }

net/ghttp/ghttp_request_param_ctx.go

@@ -31,7 +31,7 @@ func (r *Request) Context() context.Context {
 		// Inject Request object into context.
 		ctx = context.WithValue(ctx, ctxKeyForRequest, r)
 		// Update the values of the original HTTP request.
-		*r.Request = *r.Request.WithContext(ctx)
+		*r.Request = *r.WithContext(ctx)
 	}
 	return ctx
 }
@@ -72,5 +72,5 @@ func (r *Request) GetCtxVar(key interface{}, def ...interface{}) *gvar.Var {
 func (r *Request) SetCtxVar(key interface{}, value interface{}) {
 	var ctx = r.Context()
 	ctx = context.WithValue(ctx, key, value)
-	*r.Request = *r.Request.WithContext(ctx)
+	*r.Request = *r.WithContext(ctx)
 }

net/ghttp/ghttp_response_write.go

@@ -30,9 +30,9 @@ func (r *Response) Write(content ...interface{}) {
 		case []byte:
 			_, _ = r.BufferWriter.Write(value)
 		case string:
-			_, _ = r.BufferWriter.WriteString(value)
+			_, _ = r.WriteString(value)
 		default:
-			_, _ = r.BufferWriter.WriteString(gconv.String(v))
+			_, _ = r.WriteString(gconv.String(v))
 		}
 	}
 }

net/ghttp/ghttp_server_handler.go

@@ -204,7 +204,7 @@ func (s *Server) handleAfterRequestDone(request *Request) {
 
 	// Close the request and response body
 	// to release the file descriptor in time.
-	err := request.Request.Body.Close()
+	err := request.Body.Close()
 	if err != nil {
 		intlog.Errorf(request.Context(), `%+v`, err)
 	}

net/ghttp/internal/response/response_buffer_writer.go

@@ -74,15 +74,15 @@ func (w *BufferWriter) WriteHeader(status int) {
 
 // Flush outputs the buffer to clients and clears the buffer.
 func (w *BufferWriter) Flush() {
-	if w.Writer.IsHijacked() {
+	if w.IsHijacked() {
 		return
 	}
 
-	if w.Status != 0 && !w.Writer.IsHeaderWrote() {
+	if w.Status != 0 && !w.IsHeaderWrote() {
 		w.Writer.WriteHeader(w.Status)
 	}
 	// Default status text output.
-	if w.Status != http.StatusOK && w.buffer.Len() == 0 && w.Writer.BytesWritten() == 0 {
+	if w.Status != http.StatusOK && w.buffer.Len() == 0 && w.BytesWritten() == 0 {
 		w.buffer.WriteString(http.StatusText(w.Status))
 	}
 	if w.buffer.Len() > 0 {

net/gipv4/gipv4_convert.go

@@ -16,11 +16,11 @@ import (
 
 // IpToLongBigEndian converts ip address to an uint32 integer with big endian.
 func IpToLongBigEndian(ip string) uint32 {
-	netIp := net.ParseIP(ip)
-	if netIp == nil {
+	netIP := net.ParseIP(ip)
+	if netIP == nil {
 		return 0
 	}
-	return binary.BigEndian.Uint32(netIp.To4())
+	return binary.BigEndian.Uint32(netIP.To4())
 }
 
 // LongToIpBigEndian converts an uint32 integer ip address to its string type address with big endian.