gin/logger.go

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// Copyright 2014 Manu Martinez-Almeida. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.
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package gin
import (
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"fmt"
"io"
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"time"
)
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var (
green = string([]byte{27, 91, 57, 55, 59, 52, 50, 109})
white = string([]byte{27, 91, 57, 48, 59, 52, 55, 109})
yellow = string([]byte{27, 91, 57, 55, 59, 52, 51, 109})
red = string([]byte{27, 91, 57, 55, 59, 52, 49, 109})
blue = string([]byte{27, 91, 57, 55, 59, 52, 52, 109})
magenta = string([]byte{27, 91, 57, 55, 59, 52, 53, 109})
cyan = string([]byte{27, 91, 57, 55, 59, 52, 54, 109})
reset = string([]byte{27, 91, 48, 109})
)
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func ErrorLogger() HandlerFunc {
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return ErrorLoggerT(ErrorTypeAny)
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}
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func ErrorLoggerT(typ ErrorType) HandlerFunc {
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return func(c *Context) {
c.Next()
if !c.Writer.Written() {
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json := c.Errors.ByType(typ).JSON()
if json != nil {
c.JSON(-1, json)
}
}
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}
}
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// Instances a Logger middleware that will write the logs to gin.DefaultWriter
// By default gin.DefaultWriter = os.Stdout
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func Logger() HandlerFunc {
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return LoggerWithWriter(DefaultWriter)
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}
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// Instance a Logger middleware with the specified writter buffer.
// Example: os.Stdout, a file opened in write mode, a socket...
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func LoggerWithWriter(out io.Writer) HandlerFunc {
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return func(c *Context) {
// Start timer
start := time.Now()
path := c.Request.URL.Path
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// Process request
c.Next()
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// Stop timer
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end := time.Now()
latency := end.Sub(start)
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clientIP := c.ClientIP()
method := c.Request.Method
statusCode := c.Writer.Status()
statusColor := colorForStatus(statusCode)
methodColor := colorForMethod(method)
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comment := c.Errors.ByType(ErrorTypePrivate).String()
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fmt.Fprintf(out, "[GIN] %v |%s %3d %s| %13v | %s |%s %s %-7s %s\n%s",
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end.Format("2006/01/02 - 15:04:05"),
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statusColor, statusCode, reset,
latency,
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clientIP,
methodColor, reset, method,
path,
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comment,
)
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}
}
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func colorForStatus(code int) string {
switch {
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case code >= 200 && code < 300:
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return green
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case code >= 300 && code < 400:
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return white
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case code >= 400 && code < 500:
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return yellow
default:
return red
}
}
func colorForMethod(method string) string {
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switch method {
case "GET":
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return blue
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case "POST":
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return cyan
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case "PUT":
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return yellow
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case "DELETE":
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return red
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case "PATCH":
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return green
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case "HEAD":
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return magenta
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case "OPTIONS":
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return white
default:
return reset
}
}