提交

internal/middleware/cors.go

@@ -0,0 +1,30 @@
+package middleware
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+//Cors 跨域中间件
+func Cors() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		origin := c.Request.Header.Get("origin") //请求头部
+		if len(origin) == 0 {
+			origin = c.Request.Header.Get("Origin")
+		}
+		//接收客户端发送的origin （重要！）
+		c.Writer.Header().Set("Access-Control-Allow-Origin", origin)
+		//允许客户端传递校验信息比如 cookie (重要)
+		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")
+		c.Writer.Header().Set("Access-Control-Allow-Headers", "Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization, accept, origin, Cache-Control, X-Requested-With")
+		//服务器支持的所有跨域请求的方法
+		c.Writer.Header().Set("Access-Control-Allow-Methods", "OPTIONS, GET, POST, PUT, DELETE, UPDATE")
+		c.Writer.Header().Set("Content-Type", "application/json; charset=utf-8")
+		// 设置预验请求有效期为 86400 秒
+		c.Writer.Header().Set("Access-Control-Max-Age", "86400")
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(200)
+			return
+		}
+		c.Next()
+	}
+}