52 lines
1.4 KiB
Go
52 lines
1.4 KiB
Go
/*
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* Copyright 2023 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package middlewares
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import (
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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/go-http-utils/headers"
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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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origin := c.GetHeader(headers.Origin)
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if origin == "" {
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c.Next()
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return
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}
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c.Header(headers.AccessControlAllowOrigin, origin)
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c.Header(headers.AccessControlAllowCredentials, "true")
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if c.Request.Method != http.MethodOptions {
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c.Next()
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return
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}
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// Preflight OPTIONS request.
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c.Header(headers.AccessControlAllowHeaders, c.GetHeader("Access-Control-Request-Headers"))
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c.Header(headers.AccessControlAllowMethods, strings.Join([]string{http.MethodGet, http.MethodHead, http.MethodPut, http.MethodPost, http.MethodDelete, http.MethodPatch}, ","))
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c.Header(headers.AccessControlMaxAge, "600000")
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c.Status(http.StatusNoContent)
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c.Abort()
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}
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}
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