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header.go
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/
header.go
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package middleware
import (
"net/http"
"time"
"github.com/gin-gonic/gin"
)
// options
//
// is a middleware function that appends headers
// for options requests and aborts then exits the middleware
// chain and ends the request.
func options(c *gin.Context) {
if c.Request.Method != "OPTIONS" {
c.Next()
} else {
c.Header("Access-Control-Allow-Origin", "*")
c.Header("Access-Control-Allow-Methods", "GET,POST,PUT,PATCH,DELETE,OPTIONS")
c.Header("Access-Control-Allow-Headers", "authorization, origin, content-type, accept")
c.Header("Allow", "HEAD,GET,POST,PUT,PATCH,DELETE,OPTIONS")
c.Header("Content-Type", "application/json")
c.AbortWithStatus(200)
}
}
// secure
//
// is a middleware function that appends security
// and resource access headers.
func secure(c *gin.Context) {
c.Header("Access-Control-Allow-Origin", "*")
c.Header("X-Frame-options", "DENY")
c.Header("X-Content-Type-options", "nosniff")
c.Header("X-XSS-Protection", "1; mode=block")
if c.Request.TLS != nil {
c.Header("Strict-Transport-Security", "max-age=31536000")
}
// Also consider adding Content-Security-Policy headers
// c.Header("Content-Security-Policy", "script-src 'self' https://cdnjs.cloudflare.com")
}
// noCache is a middleware function that appends headers
//
// to prevent the client from caching the HTTP response.
func noCache(c *gin.Context) {
c.Header("Cache-Control", "no-cache, no-store, max-age=0, must-revalidate, value")
c.Header("Expires", "Thu, 01 Jan 1970 00:00:00 GMT")
c.Header("Last-Modified", time.Now().UTC().Format(http.TimeFormat))
c.Next()
}