49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
package httpapi
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import (
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"net/http"
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"strings"
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)
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func parseCORSOrigins(spec string) []string {
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spec = strings.TrimSpace(spec)
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if spec == "" {
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return nil
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}
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var out []string
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for _, p := range strings.Split(spec, ",") {
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p = strings.TrimSpace(p)
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if p != "" {
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out = append(out, p)
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}
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}
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return out
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}
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func (s *Server) withCORS(h http.Handler) http.Handler {
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if len(s.corsOrigins) == 0 {
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return h
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}
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allowed := make(map[string]struct{}, len(s.corsOrigins))
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for _, o := range s.corsOrigins {
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allowed[o] = struct{}{}
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}
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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origin := r.Header.Get("Origin")
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if origin != "" {
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if _, ok := allowed[origin]; ok {
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w.Header().Set("Access-Control-Allow-Origin", origin)
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w.Header().Set("Access-Control-Allow-Credentials", "true")
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w.Header().Add("Vary", "Origin")
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}
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}
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w.Header().Set("Access-Control-Allow-Headers", "Authorization, Content-Type, Idempotency-Key, Accept, X-Tenant-Id")
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w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PATCH, DELETE, OPTIONS")
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if r.Method == http.MethodOptions {
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w.WriteHeader(http.StatusNoContent)
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return
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}
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h.ServeHTTP(w, r)
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})
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}
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