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e.Use(middleware.RequestID())

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e.Use(middleware.RequestIDWithConfig(middleware.RequestIDConfig{
  Generator: func() string {
    return customGenerator()
  },
}))

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RequestIDConfig struct {
  // Skipper defines a function to skip middleware.
  Skipper Skipper

  // Generator defines a function to generate an ID.
  // Optional. Default value random.String(32).
  Generator func() string

  // TargetHeader defines what header to look for to populate the id
  TargetHeader string
}

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DefaultRequestIDConfig = RequestIDConfig{
  Skipper:   DefaultSkipper,
  Generator: generator,
  TargetHeader: echo.HeaderXRequestID,
}

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curl -H "X-Request-ID: 3" --compressed -v "http://localhost:1323/?my=param"

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{"time":"2017-11-13T20:26:28.6438003+01:00","id":"3","remote_ip":"::1","host":"localhost:1323","method":"GET","uri":"/?my=param","my":"param","status":200, "latency":0,"latency_human":"0s","bytes_in":0,"bytes_out":13}