Cosmos-Server/src/utils/middleware.go

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2023-03-10 20:59:56 +00:00
package utils
import (
"context"
"net/http"
"time"
)
// https://github.com/go-chi/chi/blob/master/middleware/timeout.go
func MiddlewareTimeout(timeout time.Duration) func(next http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
ctx, cancel := context.WithTimeout(r.Context(), timeout)
defer func() {
cancel()
if ctx.Err() == context.DeadlineExceeded {
Error("Request Timeout. Cancelling.", ctx.Err())
HTTPError(w, "Gateway Timeout",
http.StatusGatewayTimeout, "HTTP002")
return
}
}()
r = r.WithContext(ctx)
next.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
}
func SetSecurityHeaders(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if(IsHTTPS) {
// TODO: Add preload if we have a valid certificate
w.Header().Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
}
w.Header().Set("X-Content-Type-Options", "nosniff")
w.Header().Set("X-Frame-Options", "DENY")
w.Header().Set("X-XSS-Protection", "1; mode=block")
// w.Header().Set("Referrer-Policy", "no-referrer")
next.ServeHTTP(w, r)
})
}
func CORSHeader(origin string) func(next http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", origin)
w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
w.Header().Set("Access-Control-Allow-Headers", "Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
w.Header().Set("Access-Control-Allow-Credentials", "true")
next.ServeHTTP(w, r)
})
}
}
func AcceptHeader(accept string) func(next http.Handler) http.Handler {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", accept)
next.ServeHTTP(w, r)
})
}
}