✨ init project

middleware/cors.go

@@ -0,0 +1,73 @@
+package middleware
+
+import (
+	"git.echol.cn/loser/lckt/config"
+	"git.echol.cn/loser/lckt/global"
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
+
+// Cors 直接放行所有跨域请求并放行所有 OPTIONS 方法
+func Cors() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		method := c.Request.Method
+		origin := c.Request.Header.Get("Origin")
+		c.Header("Access-Control-Allow-Origin", origin)
+		c.Header("Access-Control-Allow-Headers", "Content-Type,AccessToken,X-CSRF-Token, Authorization, Token,X-Token,X-User-Id")
+		c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS,DELETE,PUT")
+		c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-Type, New-Token, New-Expires-At")
+		c.Header("Access-Control-Allow-Credentials", "true")
+
+		// 放行所有OPTIONS方法
+		if method == "OPTIONS" {
+			c.AbortWithStatus(http.StatusNoContent)
+		}
+		// 处理请求
+		c.Next()
+	}
+}
+
+// CorsByRules 按照配置处理跨域请求
+func CorsByRules() gin.HandlerFunc {
+	// 放行全部
+	if global.GVA_CONFIG.Cors.Mode == "allow-all" {
+		return Cors()
+	}
+	return func(c *gin.Context) {
+		whitelist := checkCors(c.GetHeader("origin"))
+
+		// 通过检查, 添加请求头
+		if whitelist != nil {
+			c.Header("Access-Control-Allow-Origin", whitelist.AllowOrigin)
+			c.Header("Access-Control-Allow-Headers", whitelist.AllowHeaders)
+			c.Header("Access-Control-Allow-Methods", whitelist.AllowMethods)
+			c.Header("Access-Control-Expose-Headers", whitelist.ExposeHeaders)
+			if whitelist.AllowCredentials {
+				c.Header("Access-Control-Allow-Credentials", "true")
+			}
+		}
+
+		// 严格白名单模式且未通过检查，直接拒绝处理请求
+		if whitelist == nil && global.GVA_CONFIG.Cors.Mode == "strict-whitelist" && !(c.Request.Method == "GET" && c.Request.URL.Path == "/health") {
+			c.AbortWithStatus(http.StatusForbidden)
+		} else {
+			// 非严格白名单模式，无论是否通过检查均放行所有 OPTIONS 方法
+			if c.Request.Method == http.MethodOptions {
+				c.AbortWithStatus(http.StatusNoContent)
+			}
+		}
+
+		// 处理请求
+		c.Next()
+	}
+}
+
+func checkCors(currentOrigin string) *config.CORSWhitelist {
+	for _, whitelist := range global.GVA_CONFIG.Cors.Whitelist {
+		// 遍历配置中的跨域头，寻找匹配项
+		if currentOrigin == whitelist.AllowOrigin {
+			return &whitelist
+		}
+	}
+	return nil
+}