forked from onrik/logrus
/
middleware.go
113 lines (100 loc) · 2.38 KB
/
middleware.go
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package echo
import (
"time"
"github.com/labstack/echo/v4"
"github.com/sirupsen/logrus"
)
// Skipper defines a function to skip middleware.
type Skipper func(c echo.Context) bool
// Config defines the config for Logger middleware.
type Config struct {
Logger *logrus.Logger
// Skipper defines a function to skip middleware.
Skipper Skipper
// Fields available for logging
// - id (Request ID)
// - ip
// - host
// - referer
// - user_agent
// - status
// - latency
// - headers
Fields []string
Status int
}
var (
// DefaultConfig is the default Logger middleware config.
DefaultConfig = Config{
Logger: logrus.StandardLogger(),
Skipper: func(c echo.Context) bool { return false },
Fields: []string{"ip", "latency", "status"},
Status: 0,
}
)
// Middleware returns a Logger middleware with config.
func Middleware(config Config) echo.MiddlewareFunc {
// Defaults
if config.Skipper == nil {
config.Skipper = DefaultConfig.Skipper
}
if config.Logger == nil {
config.Logger = logrus.StandardLogger()
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) (err error) {
if config.Skipper(c) {
return next(c)
}
fields := logrus.Fields{}
req := c.Request()
res := c.Response()
start := time.Now()
if err = next(c); err != nil {
c.Error(err)
fields["error"] = err
}
stop := time.Now()
path := req.URL.Path
if path == "" {
path = "/"
}
for _, field := range config.Fields {
switch field {
case "id":
id := req.Header.Get(echo.HeaderXRequestID)
if id == "" {
id = res.Header().Get(echo.HeaderXRequestID)
}
fields[field] = id
case "ip":
fields[field] = c.RealIP()
case "host":
fields[field] = req.Host
case "referer":
fields[field] = req.Referer()
case "user_agent":
fields[field] = req.UserAgent()
case "status":
fields[field] = res.Status
case "latency":
fields[field] = stop.Sub(start).String()
case "headers":
fields[field] = req.Header
}
}
if res.Status < config.Status {
return
}
switch {
case res.Status >= 500:
config.Logger.WithFields(fields).Errorf("%s %s", req.Method, path)
case res.Status >= 400:
config.Logger.WithFields(fields).Warnf("%s %s", req.Method, path)
default:
config.Logger.WithFields(fields).Debugf("%s %s", req.Method, path)
}
return
}
}
}