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22 lines
547 B
Go
22 lines
547 B
Go
package middleware
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import (
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"context"
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"net/http"
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)
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// Tracing is a middleware to trace HTTP request
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func Tracing(nextRequestID func() string) Middleware {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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requestID := r.Header.Get("X-Request-Id")
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if requestID == "" {
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requestID = nextRequestID()
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}
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ctx := context.WithValue(r.Context(), requestIDKey, requestID)
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w.Header().Set("X-Request-Id", requestID)
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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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