--- /dev/null
+package logger
+
+import (
+ "bytes"
+ "encoding/json"
+ "fmt"
+ "reflect"
+ "strconv"
+ "sync"
+ "time"
+)
+
+const (
+ timeFormat = "2006-01-02T15:04:05-0700"
+ termTimeFormat = "2006/01/02 15:04:05"
+ termSmallTimeFormat = "15:04:05"
+ floatFormat = 'f'
+ errorKey = "REVEL_ERROR"
+)
+
+var (
+ levelString = map[LogLevel]string{LvlDebug: "DEBUG",
+ LvlInfo: "INFO", LvlWarn: "WARN", LvlError: "ERROR", LvlCrit: "CRIT"}
+)
+
+// Outputs to the terminal in a format like below
+// INFO 09:11:32 server-engine.go:169: Request Stats
+func TerminalFormatHandler(noColor bool, smallDate bool) LogFormat {
+ dateFormat := termTimeFormat
+ if smallDate {
+ dateFormat = termSmallTimeFormat
+ }
+ return FormatFunc(func(r *Record) []byte {
+ // Bash coloring http://misc.flogisoft.com/bash/tip_colors_and_formatting
+ var color = 0
+ switch r.Level {
+ case LvlCrit:
+ // Magenta
+ color = 35
+ case LvlError:
+ // Red
+ color = 31
+ case LvlWarn:
+ // Yellow
+ color = 33
+ case LvlInfo:
+ // Green
+ color = 32
+ case LvlDebug:
+ // Cyan
+ color = 36
+ }
+
+ b := &bytes.Buffer{}
+ caller, _ := r.Context["caller"].(string)
+ module, _ := r.Context["module"].(string)
+ if noColor == false && color > 0 {
+ if len(module) > 0 {
+ fmt.Fprintf(b, "\x1b[%dm%-5s\x1b[0m %s %6s %13s: %-40s ", color, levelString[r.Level], r.Time.Format(dateFormat), module, caller, r.Message)
+ } else {
+ fmt.Fprintf(b, "\x1b[%dm%-5s\x1b[0m %s %13s: %-40s ", color, levelString[r.Level], r.Time.Format(dateFormat), caller, r.Message)
+ }
+ } else {
+ fmt.Fprintf(b, "%-5s %s %6s %13s: %-40s", levelString[r.Level], r.Time.Format(dateFormat), module, caller, r.Message)
+ }
+
+ i := 0
+ for k, v := range r.Context {
+ if i != 0 {
+ b.WriteByte(' ')
+ }
+ i++
+ if k == "module" || k == "caller" {
+ continue
+ }
+
+ v := formatLogfmtValue(v)
+
+ // TODO: we should probably check that all of your key bytes aren't invalid
+ if noColor == false && color > 0 {
+ fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m=%s", color, k, v)
+ } else {
+ b.WriteString(k)
+ b.WriteByte('=')
+ b.WriteString(v)
+ }
+ }
+
+ b.WriteByte('\n')
+
+ return b.Bytes()
+ })
+}
+
+// formatValue formats a value for serialization
+func formatLogfmtValue(value interface{}) string {
+ if value == nil {
+ return "nil"
+ }
+
+ if t, ok := value.(time.Time); ok {
+ // Performance optimization: No need for escaping since the provided
+ // timeFormat doesn't have any escape characters, and escaping is
+ // expensive.
+ return t.Format(termTimeFormat)
+ }
+ value = formatShared(value)
+ switch v := value.(type) {
+ case bool:
+ return strconv.FormatBool(v)
+ case float32:
+ return strconv.FormatFloat(float64(v), floatFormat, 3, 64)
+ case float64:
+ return strconv.FormatFloat(v, floatFormat, 7, 64)
+ case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
+ return fmt.Sprintf("%d", value)
+ case string:
+ return escapeString(v)
+ default:
+ return escapeString(fmt.Sprintf("%+v", value))
+ }
+}
+
+// Format the value in json format
+func formatShared(value interface{}) (result interface{}) {
+ defer func() {
+ if err := recover(); err != nil {
+ if v := reflect.ValueOf(value); v.Kind() == reflect.Ptr && v.IsNil() {
+ result = "nil"
+ } else {
+ panic(err)
+ }
+ }
+ }()
+
+ switch v := value.(type) {
+ case time.Time:
+ return v.Format(timeFormat)
+
+ case error:
+ return v.Error()
+
+ case fmt.Stringer:
+ return v.String()
+
+ default:
+ return v
+ }
+}
+
+// A reusuable buffer for outputting data
+var stringBufPool = sync.Pool{
+ New: func() interface{} { return new(bytes.Buffer) },
+}
+
+// Escape the string when needed
+func escapeString(s string) string {
+ needsQuotes := false
+ needsEscape := false
+ for _, r := range s {
+ if r <= ' ' || r == '=' || r == '"' {
+ needsQuotes = true
+ }
+ if r == '\\' || r == '"' || r == '\n' || r == '\r' || r == '\t' {
+ needsEscape = true
+ }
+ }
+ if needsEscape == false && needsQuotes == false {
+ return s
+ }
+ e := stringBufPool.Get().(*bytes.Buffer)
+ e.WriteByte('"')
+ for _, r := range s {
+ switch r {
+ case '\\', '"':
+ e.WriteByte('\\')
+ e.WriteByte(byte(r))
+ case '\n':
+ e.WriteString("\\n")
+ case '\r':
+ e.WriteString("\\r")
+ case '\t':
+ e.WriteString("\\t")
+ default:
+ e.WriteRune(r)
+ }
+ }
+ e.WriteByte('"')
+ var ret string
+ if needsQuotes {
+ ret = e.String()
+ } else {
+ ret = string(e.Bytes()[1 : e.Len()-1])
+ }
+ e.Reset()
+ stringBufPool.Put(e)
+ return ret
+}
+
+// JsonFormatEx formats log records as JSON objects. If pretty is true,
+// records will be pretty-printed. If lineSeparated is true, records
+// will be logged with a new line between each record.
+func JsonFormatEx(pretty, lineSeparated bool) LogFormat {
+ jsonMarshal := json.Marshal
+ if pretty {
+ jsonMarshal = func(v interface{}) ([]byte, error) {
+ return json.MarshalIndent(v, "", " ")
+ }
+ }
+
+ return FormatFunc(func(r *Record) []byte {
+ props := make(map[string]interface{})
+
+ props["t"] = r.Time
+ props["lvl"] = levelString[r.Level]
+ props["msg"] = r.Message
+ for k, v := range r.Context {
+ props[k] = formatJsonValue(v)
+ }
+
+ b, err := jsonMarshal(props)
+ if err != nil {
+ b, _ = jsonMarshal(map[string]string{
+ errorKey: err.Error(),
+ })
+ return b
+ }
+
+ if lineSeparated {
+ b = append(b, '\n')
+ }
+
+ return b
+ })
+}
+
+func formatJsonValue(value interface{}) interface{} {
+ value = formatShared(value)
+ switch value.(type) {
+ case int, int8, int16, int32, int64, float32, float64, uint, uint8, uint16, uint32, uint64, string:
+ return value
+ default:
+ return fmt.Sprintf("%+v", value)
+ }
+}
Code Review / iec.git / blobdiff