woodpecker/router/middleware/header/header.go
2015-10-27 16:48:05 -07:00

60 lines
1.8 KiB
Go

package header
import (
"net/http"
"time"
"github.com/gin-gonic/gin"
)
var version string
// 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()
}
// 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-Methods", "GET,POST,PUT,PATCH,DELETE,OPTIONS")
c.Header("Access-Control-Allow-Headers", "Authorization")
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")
}
// Version is a middleware function that appends the Drone
// version information to the HTTP response. This is intended
// for debugging and troubleshooting.
func Version(version string) gin.HandlerFunc {
return func(c *gin.Context) {
c.Set("version", "0.4.0-beta+"+version)
c.Header("X-DRONE-VERSION", "0.4.0-beta+"+version)
c.Next()
}
}