commit
3c99b84721
1 changed files with 32 additions and 0 deletions
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@ -17,6 +17,12 @@ import (
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// ResponseHeaders are returned with each response
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var ResponseHeaders map[string]string
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// CorsDomains Allowed domains for CORS Policy
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var CorsDomains []string
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// CorsAllowLocalhost if true localhost connections are always allowed
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var CorsAllowLocalhost bool
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// Log allows logging of events and errors
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var Log = func(*http.Request, *Response, error) {}
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@ -77,6 +83,32 @@ func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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w.Header().Set(key, value)
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}
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}
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origin := r.Header.Get("origin")
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for _, d := range CorsDomains {
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if d == origin {
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w.Header().Set("Access-Control-Allow-Origin", d)
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vary := w.Header().Get("Vary")
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if vary != "*" {
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if vary != "" {
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vary += ", "
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}
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vary += "Origin"
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}
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w.Header().Set("Vary", vary)
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}
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}
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if CorsAllowLocalhost && strings.HasPrefix(origin, "http://localhost:") {
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w.Header().Set("Access-Control-Allow-Origin", origin)
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vary := w.Header().Get("Vary")
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if vary != "*" {
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if vary != "" {
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vary += ", "
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}
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vary += "Origin"
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}
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w.Header().Set("Vary", vary)
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}
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// Stop here if its a preflighted OPTIONS request
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if r.Method == "OPTIONS" {
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