82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
package middleware
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import (
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"errors"
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"net/http"
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"strings"
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"github.com/gin-gonic/gin"
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"github.com/user-management-system/internal/config"
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)
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var corsConfig = config.CORSConfig{
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AllowedOrigins: []string{}, // 默认为空，必须显式配置
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AllowCredentials: false, // 默认关闭凭证，必须显式启用
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}
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func validateCORSConfig(cfg config.CORSConfig) error {
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for _, origin := range cfg.AllowedOrigins {
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if origin == "*" && cfg.AllowCredentials {
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return errors.New("CORS 配置错误: AllowedOrigins 包含 '*' 时不能启用 AllowCredentials")
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}
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}
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return nil
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}
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func SetCORSConfig(cfg config.CORSConfig) error {
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if err := validateCORSConfig(cfg); err != nil {
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return err
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}
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corsConfig = cfg
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return nil
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}
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func CORS() gin.HandlerFunc {
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return func(c *gin.Context) {
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cfg := corsConfig
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origin := c.GetHeader("Origin")
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if origin != "" {
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allowOrigin, allowed := resolveAllowedOrigin(origin, cfg.AllowedOrigins, cfg.AllowCredentials)
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if !allowed {
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if c.Request.Method == http.MethodOptions {
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c.AbortWithStatus(http.StatusForbidden)
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return
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}
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c.AbortWithStatus(http.StatusForbidden)
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return
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}
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c.Writer.Header().Set("Access-Control-Allow-Origin", allowOrigin)
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if cfg.AllowCredentials {
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c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
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}
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}
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if c.Request.Method == http.MethodOptions {
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c.Writer.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
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c.Writer.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type, X-Requested-With, X-CSRF-Token")
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c.Writer.Header().Set("Access-Control-Max-Age", "3600")
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c.AbortWithStatus(http.StatusNoContent)
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return
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}
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c.Next()
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}
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}
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func resolveAllowedOrigin(origin string, allowedOrigins []string, allowCredentials bool) (string, bool) {
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for _, allowed := range allowedOrigins {
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if allowed == "*" {
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if allowCredentials {
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return origin, true
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}
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return "*", true
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}
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if strings.EqualFold(origin, allowed) {
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return origin, true
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}
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}
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return "", false
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}
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