74 lines
2.4 KiB
Go
74 lines
2.4 KiB
Go
package middleware
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import (
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"git.echol.cn/loser/Go-Web-Template/server/config"
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"git.echol.cn/loser/Go-Web-Template/server/global"
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"github.com/gin-gonic/gin"
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"net/http"
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)
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// Cors 直接放行所有跨域请求并放行所有 OPTIONS 方法
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func Cors() gin.HandlerFunc {
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return func(c *gin.Context) {
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method := c.Request.Method
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origin := c.Request.Header.Get("Origin")
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c.Header("Access-Control-Allow-Origin", origin)
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c.Header("Access-Control-Allow-Headers", "Content-Type,AccessToken,X-CSRF-Token, Authorization, Token,X-Token,X-User-Id")
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c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS,DELETE,PUT")
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c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Content-Type, New-Token, New-Expires-At")
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c.Header("Access-Control-Allow-Credentials", "true")
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// 放行所有OPTIONS方法（预检请求不应继续进入路由，否则易落到 404）
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if 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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// CorsByRules 按照配置处理跨域请求
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func CorsByRules() gin.HandlerFunc {
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// 放行全部
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if global.GVA_CONFIG.Cors.Mode == "allow-all" {
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return Cors()
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}
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return func(c *gin.Context) {
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whitelist := checkCors(c.GetHeader("origin"))
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// 通过检查, 添加请求头
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if whitelist != nil {
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c.Header("Access-Control-Allow-Origin", whitelist.AllowOrigin)
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c.Header("Access-Control-Allow-Headers", whitelist.AllowHeaders)
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c.Header("Access-Control-Allow-Methods", whitelist.AllowMethods)
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c.Header("Access-Control-Expose-Headers", whitelist.ExposeHeaders)
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if whitelist.AllowCredentials {
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c.Header("Access-Control-Allow-Credentials", "true")
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}
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}
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// 严格白名单模式且未通过检查，直接拒绝处理请求
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if whitelist == nil && global.GVA_CONFIG.Cors.Mode == "strict-whitelist" && !(c.Request.Method == "GET" && c.Request.URL.Path == "/health") {
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c.AbortWithStatus(http.StatusForbidden)
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return
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}
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// OPTIONS 预检：直接结束，避免继续匹配路由导致 404
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if c.Request.Method == http.MethodOptions {
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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 checkCors(currentOrigin string) *config.CORSWhitelist {
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for _, whitelist := range global.GVA_CONFIG.Cors.Whitelist {
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// 遍历配置中的跨域头，寻找匹配项
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if currentOrigin == whitelist.AllowOrigin {
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return &whitelist
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}
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}
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return nil
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}
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