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Customization

Debug​

Echo#Debug can be used to enable / disable debug mode. Debug mode sets the log level to DEBUG.

Logging​

The default format for logging is JSON, which can be changed by modifying the header.

Log Header​

Echo#Logger.SetHeader(string) can be used to set the header for the logger. Default value:

{"time":"${time_rfc3339_nano}","level":"${level}","prefix":"${prefix}","file":"${short_file}","line":"${line}"}

Example

import "github.com/labstack/gommon/log"

/* ... */

if l, ok := e.Logger.(*log.Logger); ok {
  l.SetHeader("${time_rfc3339} ${level}")
}
2018-05-08T20:30:06-07:00 INFO info

Available Tags​

  • time_rfc3339
  • time_rfc3339_nano
  • level
  • prefix
  • long_file
  • short_file
  • line

Log Output​

Echo#Logger.SetOutput(io.Writer) can be used to set the output destination for the logger. Default value is os.Stdout

To completely disable logs use Echo#Logger.SetOutput(io.Discard) or Echo#Logger.SetLevel(log.OFF)

Log Level​

Echo#Logger.SetLevel(log.Lvl) can be used to set the log level for the logger. Default value is ERROR. Possible values:

  • DEBUG
  • INFO
  • WARN
  • ERROR
  • OFF

Custom Logger​

Logging is implemented using echo.Logger interface which allows you to register a custom logger using Echo#Logger.

Startup Banner​

Echo#HideBanner can be used to hide the startup banner.

Listener Port​

Echo#HidePort can be used to hide the listener port message.

Custom Listener​

Echo#*Listener can be used to run a custom listener.

Example

l, err := net.Listen("tcp", ":1323")
if err != nil {
  e.Logger.Fatal(err)
}
e.Listener = l
e.Logger.Fatal(e.Start(""))

Disable HTTP/2​

Echo#DisableHTTP2 can be used to disable HTTP/2 protocol.

Read Timeout​

Echo#*Server#ReadTimeout can be used to set the maximum duration before timing out read of the request.

Write Timeout​

Echo#*Server#WriteTimeout can be used to set the maximum duration before timing out write of the response.

Validator​

Echo#Validator can be used to register a validator for performing data validation on request payload.

Learn more

Custom Binder​

Echo#Binder can be used to register a custom binder for binding request payload.

Learn more

Custom JSON Serializer​

Echo#JSONSerializer can be used to register a custom JSON serializer.

Have a look at DefaultJSONSerializer on json.go.

Renderer​

Echo#Renderer can be used to register a renderer for template rendering.

Learn more

HTTP Error Handler​

Echo#HTTPErrorHandler can be used to register a custom http error handler.

Learn more