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logging.go « logging « internal - gitlab.com/gitlab-org/gitlab-pages.git - Unnamed repository; edit this file 'description' to name the repository.
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package logging

import (
	"net/http"

	"github.com/sirupsen/logrus"
	"gitlab.com/gitlab-org/labkit/correlation"
	"gitlab.com/gitlab-org/labkit/log"

	"gitlab.com/gitlab-org/gitlab-pages/internal/request"
)

// ConfigureLogging will initialize the system logger.
func ConfigureLogging(format string, verbose bool) error {
	var levelOption log.LoggerOption

	if format == "" {
		format = "json"
	}

	if verbose {
		levelOption = log.WithLogLevel("trace")
	} else {
		levelOption = log.WithLogLevel("info")
	}

	_, err := log.Initialize(
		log.WithFormatter(format),
		levelOption,
	)
	return err
}

// getAccessLogger will return the default logger, except when
// the log format is text, in which case a combined HTTP access
// logger will be configured. This behaviour matches Workhorse
func getAccessLogger(format string) (*logrus.Logger, error) {
	if format != "text" && format != "" {
		return logrus.StandardLogger(), nil
	}

	accessLogger := log.New()
	_, err := log.Initialize(
		log.WithLogger(accessLogger),  // Configure `accessLogger`
		log.WithFormatter("combined"), // Use the combined formatter
	)
	if err != nil {
		return nil, err
	}

	return accessLogger, nil
}

// BasicAccessLogger configures the GitLab pages basic HTTP access logger middleware
func BasicAccessLogger(handler http.Handler, format string, extraFields log.ExtraFieldsGeneratorFunc) (http.Handler, error) {
	accessLogger, err := getAccessLogger(format)
	if err != nil {
		return nil, err
	}

	return log.AccessLogger(handler,
		log.WithExtraFields(enrichExtraFields(extraFields)),
		log.WithAccessLogger(accessLogger),
		log.WithXFFAllowed(func(sip string) bool { return false }),
	), nil
}

func enrichExtraFields(extraFields log.ExtraFieldsGeneratorFunc) log.ExtraFieldsGeneratorFunc {
	return func(r *http.Request) log.Fields {
		enrichedFields := log.Fields{
			"correlation_id": correlation.ExtractFromContext(r.Context()),
			"pages_https":    request.IsHTTPS(r),
			"pages_host":     r.Host,
		}

		if extraFields != nil {
			for field, value := range extraFields(r) {
				enrichedFields[field] = value
			}
		}

		return enrichedFields
	}
}

//// AccessLogger configures the GitLab pages HTTP access logger middleware with extra log fields
//func AccessLogger(handler http.Handler, format string) (http.Handler, error) {
//	return BasicAccessLogger(handler, format, getExtraLogFields)
//}

// LogRequest will inject request host and path to the logged messages
func LogRequest(r *http.Request) *logrus.Entry {
	return log.WithFields(log.Fields{
		"correlation_id": correlation.ExtractFromContext(r.Context()),
		"host":           r.Host,
		"path":           r.URL.Path,
	})
}