26 lines
842 B
Go
26 lines
842 B
Go
// 中间件：Gin 的中间件是 func(*gin.Context)，通过 c.Next() 控制执行链
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// 执行顺序：请求进入 → 中间件1(c.Next前) → 中间件2(c.Next前) → Handler → 中间件2(c.Next后) → 中间件1(c.Next后) → 响应
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package middleware
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import (
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"net/http"
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"github.com/gin-gonic/gin"
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)
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// CORS 跨域中间件，允许 H5 调试时跨域访问
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func CORS() gin.HandlerFunc {
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return func(c *gin.Context) {
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c.Header("Access-Control-Allow-Origin", "*")
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c.Header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
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c.Header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
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c.Header("Access-Control-Expose-Headers", "Content-Length, Content-Type")
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if c.Request.Method == "OPTIONS" {
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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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