40 lines
799 B
Go
40 lines
799 B
Go
package middleware
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import (
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"context"
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"fmt"
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"net/http"
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)
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const (
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ApiKey = ContextKey("apikey")
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)
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func NewApiKey() *ApiKeyMiddleware {
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return &ApiKeyMiddleware{}
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}
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type ApiKeyMiddleware struct{}
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func (m *ApiKeyMiddleware) Handler(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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header := r.Header.Get("x-api-key")
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if len(header) == 0 {
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next.ServeHTTP(w, r)
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} else {
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ctx := context.WithValue(r.Context(), ApiKey, header)
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next.ServeHTTP(w, r.WithContext(ctx))
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}
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})
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}
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func ApiKeyFromContext(ctx context.Context) (string, error) {
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if value := ctx.Value(ApiKey); value != nil {
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if u, ok := value.(string); ok {
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return u, nil
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}
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return "", fmt.Errorf("current API-key is in wrong format")
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}
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return "", nil
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}
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