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// Copyright 2018. Akamai Technologies, Inc
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package edgegrid
import (
"bufio"
"bytes"
"encoding/json"
"fmt"
"net/http"
"net/http/httputil"
"os"
"strings"
logstd "log"
log "github.com/sirupsen/logrus"
)
var logBuffer *bufio.Writer
var LogFile *os.File
var EdgegridLog *log.Logger
func SetupLogging() {
if EdgegridLog != nil {
return // already configured
}
EdgegridLog = log.New()
EdgegridLog.SetFormatter(&log.TextFormatter{
DisableLevelTruncation: true,
EnvironmentOverrideColors: true,
})
// Log file destination specified? If not, use default stdout
if logFileName := os.Getenv("AKAMAI_LOG_FILE"); logFileName != "" {
// If the file doesn't exist, create it, or append to the file
LogFile, err := os.OpenFile(logFileName, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
log.Fatal(err)
}
EdgegridLog.SetOutput(LogFile)
}
EdgegridLog.SetLevel(log.PanicLevel)
if logLevel := os.Getenv("AKAMAI_LOG"); logLevel != "" {
level, err := log.ParseLevel(logLevel)
if err == nil {
EdgegridLog.SetLevel(level)
} else {
log.Warningln("[WARN] Unknown AKAMAI_LOG value. Allowed values: panic, fatal, error, warn, info, debug, trace")
}
}
defer LogFile.Close()
}
func LogMultiline(f func(args ...interface{}), args ...string) {
for _, str := range args {
for _, str := range strings.Split(strings.Trim(str, "\n"), "\n") {
f(str)
}
}
}
func LogMultilineln(f func(args ...interface{}), args ...string) {
LogMultiline(f, args...)
}
func LogMultilinef(f func(formatter string, args ...interface{}), formatter string, args ...interface{}) {
str := fmt.Sprintf(formatter, args...)
for _, str := range strings.Split(strings.Trim(str, "\n"), "\n") {
f(str)
}
}
// Utility func to print http req
func PrintHttpRequest(req *http.Request, body bool) {
if req == nil {
return
}
b, err := httputil.DumpRequestOut(req, body)
if err == nil {
LogMultiline(EdgegridLog.Traceln, string(b))
}
}
func PrintHttpRequestCorrelation(req *http.Request, body bool, correlationid string) {
if req == nil {
return
}
b, err := httputil.DumpRequestOut(req, body)
if err == nil {
LogMultiline(EdgegridLog.Traceln, string(b))
PrintfCorrelation("[DEBUG] REQUEST", correlationid, prettyPrintJsonLines(b))
}
}
// Utility func to print http response
func PrintHttpResponse(res *http.Response, body bool) {
if res == nil {
return
}
b, err := httputil.DumpResponse(res, body)
if err == nil {
LogMultiline(EdgegridLog.Traceln, string(b))
}
}
func PrintHttpResponseCorrelation(res *http.Response, body bool, correlationid string) {
if res == nil {
return
}
b, err := httputil.DumpResponse(res, body)
if err == nil {
LogMultiline(EdgegridLog.Traceln, string(b))
PrintfCorrelation("[DEBUG] RESPONSE ", correlationid, prettyPrintJsonLines(b))
}
}
func PrintfCorrelation(level string, correlationid string, msg string) {
if correlationid == "" {
logstd.Printf("%s %s\n", level, msg)
} else {
logstd.SetFlags(0)
logstd.Printf("%v %s\n", correlationid, msg)
}
}
// prettyPrintJsonLines iterates through a []byte line-by-line,
// transforming any lines that are complete json into pretty-printed json.
func prettyPrintJsonLines(b []byte) string {
parts := strings.Split(string(b), "\n")
for i, p := range parts {
if b := []byte(p); json.Valid(b) {
var out bytes.Buffer
json.Indent(&out, b, "", " ")
parts[i] = out.String()
}
}
return strings.Join(parts, "\n")
}
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