merge

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
     - name: Install Go
-      uses: actions/setup-go@v3
+      uses: actions/setup-go@v4
       with:
         go-version: ${{ matrix.go-version }}
     - name: Checkout code

README.md

@@ -30,7 +30,7 @@ Find out [who uses zlog](https://tuxpa.in/a/zlog/wiki/Who-uses-zlog) and add you
 * [Sampling](#log-sampling)
 * [Hooks](#hooks)
 * [Contextual fields](#contextual-logging)
-* `context.Context` integration
+* [`context.Context` integration](#contextcontext-integration)
 * [Integration with `net/http`](#integration-with-nethttp)
 * [JSON and CBOR encoding formats](#binary-encoding)
 * [Pretty logging for development](#pretty-logging)
@@ -505,7 +505,7 @@ log.Ctx(ctx).Info().Msg("hello world")
 ### Set as standard logger output
 
 ```go
-log := zlog.New(os.Stdout).With().
+stdlog := zlog.New(os.Stdout).With().
     Str("foo", "bar").
     Logger()
 
@@ -517,6 +517,30 @@ stdlog.Print("hello world")
 // Output: {"foo":"bar","message":"hello world"}
 ```
 
+### context.Context integration
+
+The `Logger` instance could be attached to `context.Context` values with `logger.WithContext(ctx)`
+and extracted from it using `zerolog.Ctx(ctx)`.
+
+Example to add logger to context:
+```go
+// this code attach logger instance to context fields
+ctx := context.Background()
+logger := zerolog.New(os.Stdout)
+ctx = logger.WithContext(ctx)
+someFunc(ctx)
+```
+
+Extracting logger from context:
+```go
+func someFunc(ctx context.Context) {
+  // get logger from context. if it's nill, then `zerolog.DefaultContextLogger` is returned,
+  // if `DefaultContextLogger` is nil, then disabled logger returned.
+  logger := zerolog.Ctx(ctx)
+  logger.Info().Msg("Hello")
+}
+```
+
 ### Integration with `net/http`
 
 The `tuxpa.in/a/zlog/hlog` package provides some helpers to integrate zlog with `http.Handler`.

context.go

@@ -329,8 +329,9 @@ func (ts timestampHook) Run(e *Event, level Level, msg string) {
 
 var th = timestampHook{}
 
-// Timestamp adds the current local time as UNIX timestamp to the logger context with the "time" key.
+// Timestamp adds the current local time to the logger context with the "time" key, formatted using zlog.TimeFieldFormat.
 // To customize the key name, change zlog.TimestampFieldName.
+// To customize the time format, change zlog.TimeFieldFormat.
 //
 // NOTE: It won't dedupe the "time" key if the *Context has one already.
 func (c Context) Timestamp() Context {

encoder_cbor.go

@@ -24,6 +24,9 @@ func init() {
 func appendJSON(dst []byte, j []byte) []byte {
 	return cbor.AppendEmbeddedJSON(dst, j)
 }
+func appendCBOR(dst []byte, c []byte) []byte {
+	return cbor.AppendEmbeddedCBOR(dst, c)
+}
 
 // decodeIfBinaryToString - converts a binary formatted log msg to a
 // JSON formatted String Log message.

encoder_json.go

@@ -1,3 +1,4 @@
+//go:build !binary_log
 // +build !binary_log
 
 package zlog
@@ -6,6 +7,7 @@ package zlog
 // JSON encoded byte stream.
 
 import (
+	"encoding/base64"
 	"tuxpa.in/a/zlog/internal/json"
 )
 
@@ -25,6 +27,17 @@ func init() {
 func appendJSON(dst []byte, j []byte) []byte {
 	return append(dst, j...)
 }
+func appendCBOR(dst []byte, cbor []byte) []byte {
+	dst = append(dst, []byte("\"data:application/cbor;base64,")...)
+	l := len(dst)
+	enc := base64.StdEncoding
+	n := enc.EncodedLen(len(cbor))
+	for i := 0; i < n; i++ {
+		dst = append(dst, '.')
+	}
+	enc.Encode(dst[l:], cbor)
+	return append(dst, '"')
+}
 
 func decodeIfBinaryToString(in []byte) string {
 	return string(in)

event.go

@@ -318,6 +318,18 @@ func (e *Event) RawJSON(key string, b []byte) *Event {
 	return e
 }
 
+// RawCBOR adds already encoded CBOR to the log line under key.
+//
+// No sanity check is performed on b
+// Note: The full featureset of CBOR is supported as data will not be mapped to json but stored as data-url
+func (e *Event) RawCBOR(key string, b []byte) *Event {
+	if e == nil {
+		return e
+	}
+	e.buf = appendCBOR(enc.AppendKey(e.buf, key), b)
+	return e
+}
+
 // AnErr adds the field key with serialized err to the *Event context.
 // If err is nil, no field is added.
 func (e *Event) AnErr(key string, err error) *Event {

go.mod

@@ -6,7 +6,7 @@ require (
 	github.com/coreos/go-systemd/v22 v22.5.0
 	github.com/mattn/go-colorable v0.1.12
 	github.com/pkg/errors v0.9.1
-	github.com/rs/xid v1.4.0
+	github.com/rs/xid v1.5.0
 	github.com/rs/zerolog v1.28.0
 	golang.org/x/sys v0.0.0-20220915200043-7b5979e65e41 // indirect
 )

go.sum

@@ -8,8 +8,9 @@ github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9
 github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/rs/xid v1.4.0 h1:qd7wPTDkN6KQx2VmMBLrpHkiyQwgFXRnkOLacUiaSNY=
 github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
+github.com/rs/xid v1.5.0 h1:mKX4bl4iPYJtEIxp6CYiUuLQ/8DYMoz0PUdtGgMFRVc=
+github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/rs/zerolog v1.28.0 h1:MirSo27VyNi7RJYP3078AA1+Cyzd2GB66qy3aUHvsWY=
 github.com/rs/zerolog v1.28.0/go.mod h1:NILgTygv/Uej1ra5XxGf82ZFSLk58MFGAUS2o6usyD0=
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

internal/cbor/cbor.go

@@ -27,6 +27,7 @@ const (
 
 	// Tag Sub-types.
 	additionalTypeTimestamp    byte = 01
+	additionalTypeEmbeddedCBOR byte = 63
 
 	// Extended Tags - from https://www.iana.org/assignments/cbor-tags/cbor-tags.xhtml
 	additionalTypeTagNetworkAddr   uint16 = 260

internal/cbor/decode_stream.go

@@ -5,6 +5,7 @@ package cbor
 import (
 	"bufio"
 	"bytes"
+	"encoding/base64"
 	"fmt"
 	"io"
 	"math"
@@ -213,6 +214,31 @@ func decodeString(src *bufio.Reader, noQuotes bool) []byte {
 	}
 	return append(result, '"')
 }
+func decodeStringToDataUrl(src *bufio.Reader, mimeType string) []byte {
+	pb := readByte(src)
+	major := pb & maskOutAdditionalType
+	minor := pb & maskOutMajorType
+	if major != majorTypeByteString {
+		panic(fmt.Errorf("Major type is: %d in decodeString", major))
+	}
+	length := decodeIntAdditionalType(src, minor)
+	l := int(length)
+	enc := base64.StdEncoding
+	lEnc := enc.EncodedLen(l)
+	result := make([]byte, len("\"data:;base64,\"")+len(mimeType)+lEnc)
+	dest := result
+	u := copy(dest, "\"data:")
+	dest = dest[u:]
+	u = copy(dest, mimeType)
+	dest = dest[u:]
+	u = copy(dest, ";base64,")
+	dest = dest[u:]
+	pbs := readNBytes(src, l)
+	enc.Encode(dest, pbs)
+	dest = dest[lEnc:]
+	dest[0] = '"'
+	return result
+}
 
 func decodeUTF8String(src *bufio.Reader) []byte {
 	pb := readByte(src)
@@ -349,6 +375,20 @@ func decodeTagData(src *bufio.Reader) []byte {
 	switch minor {
 	case additionalTypeTimestamp:
 		return decodeTimeStamp(src)
+	case additionalTypeIntUint8:
+		val := decodeIntAdditionalType(src, minor)
+		switch byte(val) {
+		case additionalTypeEmbeddedCBOR:
+			pb := readByte(src)
+			dataMajor := pb & maskOutAdditionalType
+			if dataMajor != majorTypeByteString {
+				panic(fmt.Errorf("Unsupported embedded Type: %d in decodeEmbeddedCBOR", dataMajor))
+			}
+			src.UnreadByte()
+			return decodeStringToDataUrl(src, "application/cbor")
+		default:
+			panic(fmt.Errorf("Unsupported Additional Tag Type: %d in decodeTagData", val))
+		}
 
 	// Tag value is larger than 256 (so uint16).
 	case additionalTypeIntUint16:

internal/cbor/string.go

@@ -93,3 +93,25 @@ func AppendEmbeddedJSON(dst, s []byte) []byte {
 	}
 	return append(dst, s...)
 }
+
+// AppendEmbeddedCBOR adds a tag and embeds input CBOR as such.
+func AppendEmbeddedCBOR(dst, s []byte) []byte {
+	major := majorTypeTags
+	minor := additionalTypeEmbeddedCBOR
+
+	// Append the TAG to indicate this is Embedded JSON.
+	dst = append(dst, major|additionalTypeIntUint8)
+	dst = append(dst, minor)
+
+	// Append the CBOR Object as Byte String.
+	major = majorTypeByteString
+
+	l := len(s)
+	if l <= additionalMax {
+		lb := byte(l)
+		dst = append(dst, major|lb)
+	} else {
+		dst = appendCborTypePrefix(dst, major, uint64(l))
+	}
+	return append(dst, s...)
+}

log.go

@@ -308,7 +308,9 @@ func (l Logger) Sample(s Sampler) Logger {
 
 // Hook returns a logger with the h Hook.
 func (l Logger) Hook(h Hook) Logger {
-	l.hooks = append(l.hooks, h)
+	newHooks := make([]Hook, len(l.hooks), len(l.hooks)+1)
+	copy(newHooks, l.hooks)
+	l.hooks = append(newHooks, h)
 	return l
 }
 

log_test.go

@@ -320,6 +320,7 @@ func TestFields(t *testing.T) {
 		Bytes("bytes", []byte("bar")).
 		Hex("hex", []byte{0x12, 0xef}).
 		RawJSON("json", []byte(`{"some":"json"}`)).
+		RawCBOR("cbor", []byte{0x83, 0x01, 0x82, 0x02, 0x03, 0x82, 0x04, 0x05}).
 		Func(func(e *Event) { e.Str("func", "func_output") }).
 		AnErr("some_err", nil).
 		Err(errors.New("some error")).
@@ -344,7 +345,7 @@ func TestFields(t *testing.T) {
 		Time("time", time.Time{}).
 		TimeDiff("diff", now, now.Add(-10*time.Second)).
 		Msg("")
-	if got, want := decodeIfBinaryToString(out.Bytes()), `{"caller":"`+caller+`","string":"foo","stringer":"127.0.0.1","stringer_nil":null,"bytes":"bar","hex":"12ef","json":{"some":"json"},"func":"func_output","error":"some error","bool":true,"int":1,"int8":2,"int16":3,"int32":4,"int64":5,"uint":6,"uint8":7,"uint16":8,"uint32":9,"uint64":10,"IPv4":"192.168.0.100","IPv6":"2001:db8:85a3::8a2e:370:7334","Mac":"00:14:22:01:23:45","Prefix":"192.168.0.100/24","float32":11.1234,"float64":12.321321321,"dur":1000,"time":"0001-01-01T00:00:00Z","diff":10000}`+"\n"; got != want {
+	if got, want := decodeIfBinaryToString(out.Bytes()), `{"caller":"`+caller+`","string":"foo","stringer":"127.0.0.1","stringer_nil":null,"bytes":"bar","hex":"12ef","json":{"some":"json"},"cbor":"data:application/cbor;base64,gwGCAgOCBAU=","func":"func_output","error":"some error","bool":true,"int":1,"int8":2,"int16":3,"int32":4,"int64":5,"uint":6,"uint8":7,"uint16":8,"uint32":9,"uint64":10,"IPv4":"192.168.0.100","IPv6":"2001:db8:85a3::8a2e:370:7334","Mac":"00:14:22:01:23:45","Prefix":"192.168.0.100/24","float32":11.1234,"float64":12.321321321,"dur":1000,"time":"0001-01-01T00:00:00Z","diff":10000}`+"\n"; got != want {
 		t.Errorf("invalid log output:\ngot:  %v\nwant: %v", got, want)
 	}
 }

pkgerrors/stacktrace.go

@@ -47,10 +47,27 @@ func MarshalStack(err error) interface{} {
 	type stackTracer interface {
 		StackTrace() errors.StackTrace
 	}
-	sterr, ok := err.(stackTracer)
+	var sterr stackTracer
+	var ok bool
+	for err != nil {
+		sterr, ok = err.(stackTracer)
+		if ok {
+			break
+		}
+
+		u, ok := err.(interface {
+			Unwrap() error
+		})
 		if !ok {
 			return nil
 		}
+
+		err = u.Unwrap()
+	}
+	if sterr == nil {
+		return nil
+	}
+
 	st := sterr.StackTrace()
 	s := &state{}
 	out := make([]map[string]string, 0, len(st))

pkgerrors/stacktrace_test.go

@@ -4,6 +4,7 @@ package pkgerrors
 
 import (
 	"bytes"
+	"fmt"
 	"regexp"
 	"testing"
 
@@ -17,11 +18,11 @@ func TestLogStack(t *testing.T) {
 	out := &bytes.Buffer{}
 	log := zlog.New(out)
 
-	err := errors.Wrap(errors.New("error message"), "from error")
+	err := fmt.Errorf("from error: %w", errors.New("error message"))
 	log.Log().Stack().Err(err).Msg("")
 
 	got := out.String()
-	want := `\{"stack":\[\{"func":"TestLogStack","line":"20","source":"stacktrace_test.go"\},.*\],"error":"from error: error message"\}\n`
+	want := `\{"stack":\[\{"func":"TestLogStack","line":"21","source":"stacktrace_test.go"\},.*\],"error":"from error: error message"\}\n`
 	if ok, _ := regexp.MatchString(want, got); !ok {
 		t.Errorf("invalid log output:\ngot:  %v\nwant: %v", got, want)
 	}
@@ -33,11 +34,11 @@ func TestLogStackFromContext(t *testing.T) {
 	out := &bytes.Buffer{}
 	log := zlog.New(out).With().Stack().Logger() // calling Stack() on log context instead of event
 
-	err := errors.Wrap(errors.New("error message"), "from error")
+	err := fmt.Errorf("from error: %w", errors.New("error message"))
 	log.Log().Err(err).Msg("") // not explicitly calling Stack()
 
 	got := out.String()
-	want := `\{"stack":\[\{"func":"TestLogStackFromContext","line":"36","source":"stacktrace_test.go"\},.*\],"error":"from error: error message"\}\n`
+	want := `\{"stack":\[\{"func":"TestLogStackFromContext","line":"37","source":"stacktrace_test.go"\},.*\],"error":"from error: error message"\}\n`
 	if ok, _ := regexp.MatchString(want, got); !ok {
 		t.Errorf("invalid log output:\ngot:  %v\nwant: %v", got, want)
 	}