34 lines
928 B
Go
34 lines
928 B
Go
package middlewares
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import (
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"crypto/rand"
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"encoding/hex"
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"github.com/gofiber/fiber/v2"
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)
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// RequestID echoes the caller's X-Request-Id on every response, errors
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// included, and mints one when the caller did not send it. The customer app
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// funnels all failures into a single retryable error state, so a support
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// conversation about "it failed" has nothing to correlate on unless the id the
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// client already holds comes back on the failing response too.
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//
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// Also stashed in c.Locals("requestid") so handlers can log it alongside the
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// real error they are hiding behind a customer-safe message.
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func RequestID() fiber.Handler {
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return func(c *fiber.Ctx) error {
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id := c.Get("X-Request-Id")
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if id == "" {
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b := make([]byte, 8)
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if _, err := rand.Read(b); err == nil {
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id = hex.EncodeToString(b)
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}
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}
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if id != "" {
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c.Locals("requestid", id)
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c.Set("X-Request-Id", id)
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}
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return c.Next()
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}
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}
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