Repository: go-kratos/kratos
Pull request #1370 (2021-08-24 15:53:19)

feat: add apollo module for kratos
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#### Description (what this PR does / why we need it):
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* The description should include the motivation for this PR or contrast this with previous behavior
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* Add apollo module for kratos #1297

#### Which issue(s) this PR fixes:
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* Automatically closes linked issue when PR is merged.

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fixes #

#### Other special notes for reviewer:


codecov-commenter: # [Codecov](https://codecov.io/gh/go-kratos/kratos/pull/1370?src=pr&el=h1&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) Report
> Merging [#1370](https://codecov.io/gh/go-kratos/kratos/pull/1370?src=pr&el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) (c35c247) into [main](https://codecov.io/gh/go-kratos/kratos/commit/9c470b217a62996c41ef5f715090ddf80c807e79?el=desc&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) (9c470b2) will **increase** coverage by `6.31%`.
> The diff coverage is `n/a`.

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```diff
@@            Coverage Diff             @@
##             main    #1370      +/-   ##
==========================================
+ Coverage   56.59%   62.90%   +6.31%     
==========================================
  Files          53       61       +8     
  Lines        2548     2847     +299     
==========================================
+ Hits         1442     1791     +349     
+ Misses        963      907      -56     
- Partials      143      149       +6     
```


| [Impacted Files](https://codecov.io/gh/go-kratos/kratos/pull/1370?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos) | Coverage Δ | |
|---|---|---|
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| [encoding/json/json.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-ZW5jb2RpbmcvanNvbi9qc29uLmdv) | `55.55% <0.00%> (-2.34%)` | :arrow_down: |
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| [config/config.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-Y29uZmlnL2NvbmZpZy5nbw==) | `54.66% <0.00%> (-1.68%)` | :arrow_down: |
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| [transport/http/context.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-dHJhbnNwb3J0L2h0dHAvY29udGV4dC5nbw==) | `30.95% <0.00%> (-1.55%)` | :arrow_down: |
| [config/file/watcher.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-Y29uZmlnL2ZpbGUvd2F0Y2hlci5nbw==) | `59.37% <0.00%> (-1.34%)` | :arrow_down: |
| [middleware/tracing/tracer.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-bWlkZGxld2FyZS90cmFjaW5nL3RyYWNlci5nbw==) | `68.42% <0.00%> (-0.81%)` | :arrow_down: |
| [transport/http/resolver.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-dHJhbnNwb3J0L2h0dHAvcmVzb2x2ZXIuZ28=) | `14.10% <0.00%> (-0.77%)` | :arrow_down: |
| [options.go](https://codecov.io/gh/go-kratos/kratos/pull/1370/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=go-kratos#diff-b3B0aW9ucy5nbw==) | `100.00% <0.00%> (ø)` | |
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------

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Patch:
diff --git a/config/apollo/apollo.go b/config/apollo/apollo.go
new file mode 100644
index 00000000..25c20ff8
--- /dev/null
+++ b/config/apollo/apollo.go
@@ -0,0 +1,47 @@
+package apollo
+
+import (
+	"github.com/go-kratos/kratos/v2/config"
+
+	"github.com/apolloconfig/agollo/v4"
+)
+
+type apollo struct {
+	client *agollo.Client
+}
+
+// NewSource start with config file in ENV
+// Linux/Mac export AGOLLO_CONF=/a/conf.properties
+// Windows set AGOLLO_CONF=c:/a/conf.properties
+// more detail:https://github.com/apolloconfig/agollo/wiki/%E4%BD%BF%E7%94%A8%E6%8C%87%E5%8D%97#1312%E7%8E%AF%E5%A2%83%E5%8F%98%E9%87%8F%E6%8C%87%E5%AE%9A%E9%85%8D%E7%BD%AE%E6%96%87%E4%BB%B6
+func NewSource() config.Source {
+	client, err := agollo.Start()
+	if err != nil {
+		return nil
+	}
+	return &apollo{client}
+}
+
+func (e *apollo) load() []*config.KeyValue {
+	kv := make([]*config.KeyValue,e.client.GetDefaultConfigCache().EntryCount())
+	e.client.GetDefaultConfigCache().Range(func(key, value interface{}) bool {
+		kv = append(kv, &config.KeyValue{
+			Key:   key.(string),
+			Value: []byte(value.(string)),
+		})
+		return true
+	})
+	return kv
+}
+
+func (e *apollo) Load() (kv []*config.KeyValue, err error) {
+	return e.load(), nil
+}
+
+func (e *apollo) Watch() (config.Watcher, error) {
+	w, err := NewWatcher(e)
+	if err != nil {
+		return nil, err
+	}
+	return w, nil
+}
\ No newline at end of file
diff --git a/config/apollo/go.mod b/config/apollo/go.mod
new file mode 100644
index 00000000..be02c28f
--- /dev/null
+++ b/config/apollo/go.mod
@@ -0,0 +1,10 @@
+module github.com/go-kratos/kratos/config/apollo/v2
+
+require (
+	github.com/apolloconfig/agollo/v4 v4.0.8
+	github.com/go-kratos/kratos/v2 v2.0.4
+)
+
+replace github.com/go-kratos/kratos/v2 => ../../../kratos
+
+go 1.15
diff --git a/config/apollo/go.sum b/config/apollo/go.sum
new file mode 100644
index 00000000..64315fdd
--- /dev/null
+++ b/config/apollo/go.sum
@@ -0,0 +1,410 @@
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diff --git a/config/apollo/watcher.go b/config/apollo/watcher.go
new file mode 100644
index 00000000..ef539daa
--- /dev/null
+++ b/config/apollo/watcher.go
@@ -0,0 +1,45 @@
+package apollo
+
+import (
+	"github.com/go-kratos/kratos/v2/config"
+
+	"github.com/apolloconfig/agollo/v4/storage"
+)
+
+type watcher struct {
+	event chan []*config.KeyValue
+}
+
+type customChangeListener struct {
+	event chan []*config.KeyValue
+}
+
+func (c *customChangeListener) OnChange(changeEvent *storage.ChangeEvent) {
+}
+
+func (c *customChangeListener) OnNewestChange(changeEvent *storage.FullChangeEvent) {
+	kv := make([]*config.KeyValue,len(changeEvent.Changes))
+	for key, value := range changeEvent.Changes {
+		kv = append(kv, &config.KeyValue{
+			Key:   key,
+			Value: []byte(value.(string)),
+		})
+	}
+	c.event <- kv
+}
+
+func NewWatcher(a *apollo) (config.Watcher, error) {
+	e:=make(chan []*config.KeyValue)
+	a.client.AddChangeListener(&customChangeListener{})
+	return &watcher{event: e}, nil
+}
+
+// Next will be blocked until the Stop method is called
+func (w *watcher) Next() ([]*config.KeyValue, error) {
+	return <-w.event, nil
+}
+
+func (w *watcher) Stop() error {
+	close(w.event)
+	return nil
+}
diff --git a/config/options.go b/config/options.go
index a96d8939..d1cbeced 100644
--- a/config/options.go
+++ b/config/options.go
@@ -2,7 +2,7 @@ package config
 
 import (
 	"fmt"
-	"os"
+	"regexp"
 	"strings"
 
 	"github.com/go-kratos/kratos/v2/encoding"
@@ -81,7 +81,7 @@ func defaultDecoder(src *KeyValue, target map[string]interface{}) error {
 }
 
 // defaultResolver resolve placeholder in map value,
-// placeholder format in ${key:default} or $key.
+// placeholder format in ${key:default}.
 func defaultResolver(input map[string]interface{}) error {
 	mapper := func(name string) string {
 		args := strings.SplitN(strings.TrimSpace(name), ":", 2)
@@ -99,7 +99,7 @@ func defaultResolver(input map[string]interface{}) error {
 		for k, v := range sub {
 			switch vt := v.(type) {
 			case string:
-				sub[k] = os.Expand(vt, mapper)
+				sub[k] = expand(vt, mapper)
 			case map[string]interface{}:
 				if err := resolve(vt); err != nil {
 					return err
@@ -108,7 +108,7 @@ func defaultResolver(input map[string]interface{}) error {
 				for i, iface := range vt {
 					switch it := iface.(type) {
 					case string:
-						vt[i] = os.Expand(it, mapper)
+						vt[i] = expand(it, mapper)
 					case map[string]interface{}:
 						if err := resolve(it); err != nil {
 							return err
@@ -122,3 +122,14 @@ func defaultResolver(input map[string]interface{}) error {
 	}
 	return resolve(input)
 }
+
+func expand(s string, mapping func(string) string) string {
+	r := regexp.MustCompile(`\${(.*?)}`)
+	re := r.FindAllStringSubmatch(s, -1)
+	for _, i := range re {
+		if len(i) == 2 {
+			s = strings.ReplaceAll(s, i[0], mapping(i[1]))
+		}
+	}
+	return s
+}
diff --git a/metrics/README.md b/metrics/README.md
index f36beb4e..b8960a41 100644
--- a/metrics/README.md
+++ b/metrics/README.md
@@ -1,2 +1,6 @@
 # Metrics
-* [Prometheus](https://github.com/go-kratos/prometheus)
+
+## prometheus
+```
+go get -u github.com/go-kratos/kratos/metrics/prometheus/v2
+```
\ No newline at end of file
diff --git a/metrics/prometheus/LICENSE b/metrics/prometheus/LICENSE
new file mode 100644
index 00000000..fa53a35f
--- /dev/null
+++ b/metrics/prometheus/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Kratos
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/metrics/prometheus/README.md b/metrics/prometheus/README.md
new file mode 100644
index 00000000..ed652927
--- /dev/null
+++ b/metrics/prometheus/README.md
@@ -0,0 +1,2 @@
+# prometheus
+Monitor Prometheus metrics.
diff --git a/metrics/prometheus/go.mod b/metrics/prometheus/go.mod
new file mode 100644
index 00000000..e7d0be78
--- /dev/null
+++ b/metrics/prometheus/go.mod
@@ -0,0 +1,10 @@
+module github.com/go-kratos/kratos/metrics/prometheus/v2
+
+go 1.15
+
+require (
+	github.com/go-kratos/kratos/v2 v2.0.5
+	github.com/prometheus/client_golang v1.9.0
+)
+
+replace github.com/go-kratos/kratos/v2 v2.0.5 => ../../../kratos
diff --git a/metrics/prometheus/go.sum b/metrics/prometheus/go.sum
new file mode 100644
index 00000000..624ed700
--- /dev/null
+++ b/metrics/prometheus/go.sum
@@ -0,0 +1,471 @@
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diff --git a/metrics/prometheus/metrics/counter.go b/metrics/prometheus/metrics/counter.go
new file mode 100644
index 00000000..c5e468a0
--- /dev/null
+++ b/metrics/prometheus/metrics/counter.go
@@ -0,0 +1,35 @@
+package metrics
+
+import (
+	"github.com/go-kratos/kratos/v2/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var _ metrics.Counter = (*counter)(nil)
+
+type counter struct {
+	cv  *prometheus.CounterVec
+	lvs []string
+}
+
+// NewCounter new a prometheus counter and returns Counter.
+func NewCounter(cv *prometheus.CounterVec) metrics.Counter {
+	return &counter{
+		cv: cv,
+	}
+}
+
+func (c *counter) With(lvs ...string) metrics.Counter {
+	return &counter{
+		cv:  c.cv,
+		lvs: lvs,
+	}
+}
+
+func (c *counter) Inc() {
+	c.cv.WithLabelValues(c.lvs...).Inc()
+}
+
+func (c *counter) Add(delta float64) {
+	c.cv.WithLabelValues(c.lvs...).Add(delta)
+}
diff --git a/metrics/prometheus/metrics/gauge.go b/metrics/prometheus/metrics/gauge.go
new file mode 100644
index 00000000..3f1b4641
--- /dev/null
+++ b/metrics/prometheus/metrics/gauge.go
@@ -0,0 +1,39 @@
+package metrics
+
+import (
+	"github.com/go-kratos/kratos/v2/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var _ metrics.Gauge = (*gauge)(nil)
+
+type gauge struct {
+	gv  *prometheus.GaugeVec
+	lvs []string
+}
+
+// NewGauge new a prometheus gauge and returns Gauge.
+func NewGauge(gv *prometheus.GaugeVec) metrics.Gauge {
+	return &gauge{
+		gv: gv,
+	}
+}
+
+func (g *gauge) With(lvs ...string) metrics.Gauge {
+	return &gauge{
+		gv:  g.gv,
+		lvs: lvs,
+	}
+}
+
+func (g *gauge) Set(value float64) {
+	g.gv.WithLabelValues(g.lvs...).Set(value)
+}
+
+func (g *gauge) Add(delta float64) {
+	g.gv.WithLabelValues(g.lvs...).Add(delta)
+}
+
+func (g *gauge) Sub(delta float64) {
+	g.gv.WithLabelValues(g.lvs...).Sub(delta)
+}
diff --git a/metrics/prometheus/metrics/histogram.go b/metrics/prometheus/metrics/histogram.go
new file mode 100644
index 00000000..1ccc4328
--- /dev/null
+++ b/metrics/prometheus/metrics/histogram.go
@@ -0,0 +1,31 @@
+package metrics
+
+import (
+	"github.com/go-kratos/kratos/v2/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var _ metrics.Observer = (*histogram)(nil)
+
+type histogram struct {
+	hv  *prometheus.HistogramVec
+	lvs []string
+}
+
+// NewHistogram new a prometheus histogram and returns Histogram.
+func NewHistogram(hv *prometheus.HistogramVec) metrics.Observer {
+	return &histogram{
+		hv: hv,
+	}
+}
+
+func (h *histogram) With(lvs ...string) metrics.Observer {
+	return &histogram{
+		hv:  h.hv,
+		lvs: lvs,
+	}
+}
+
+func (h *histogram) Observe(value float64) {
+	h.hv.WithLabelValues(h.lvs...).Observe(value)
+}
diff --git a/metrics/prometheus/metrics/summary.go b/metrics/prometheus/metrics/summary.go
new file mode 100644
index 00000000..f07a4181
--- /dev/null
+++ b/metrics/prometheus/metrics/summary.go
@@ -0,0 +1,31 @@
+package metrics
+
+import (
+	"github.com/go-kratos/kratos/v2/metrics"
+	"github.com/prometheus/client_golang/prometheus"
+)
+
+var _ metrics.Observer = (*summary)(nil)
+
+type summary struct {
+	sv  *prometheus.SummaryVec
+	lvs []string
+}
+
+// NewSummary new a prometheus summary and returns Histogram.
+func NewSummary(sv *prometheus.SummaryVec) metrics.Observer {
+	return &summary{
+		sv: sv,
+	}
+}
+
+func (s *summary) With(lvs ...string) metrics.Observer {
+	return &summary{
+		sv:  s.sv,
+		lvs: lvs,
+	}
+}
+
+func (s *summary) Observe(value float64) {
+	s.sv.WithLabelValues(s.lvs...).Observe(value)
+}
diff --git a/middleware/tracing/metadata.go b/middleware/tracing/metadata.go
index 7e8cbe95..687d89fe 100644
--- a/middleware/tracing/metadata.go
+++ b/middleware/tracing/metadata.go
@@ -2,7 +2,6 @@ package tracing
 
 import (
 	"context"
-
 	"github.com/go-kratos/kratos/v2"
 	"github.com/go-kratos/kratos/v2/metadata"
 	"go.opentelemetry.io/otel/propagation"
diff --git a/registry/README.md b/registry/README.md
index 2e7e1d36..a52681ef 100644
--- a/registry/README.md
+++ b/registry/README.md
@@ -1,6 +1,26 @@
 # Registry
-* [Consul](https://github.com/go-kratos/consul)
-* [Etcd](https://github.com/go-kratos/etcd)
-* [Kube](https://github.com/go-kratos/kube)
-* [Nacos](https://github.com/go-kratos/nacos)
 
+## Consul
+```shell
+go get -u github.com/go-kratos/kratos/registry/consul/v2
+```
+
+## Etcd
+```shell
+go get -u github.com/go-kratos/kratos/registry/etcd/v2
+```
+
+## zookeeper
+```shell
+go get -u github.com/go-kratos/kratos/registry/zookeeper/v2
+```
+
+## Kube
+```shell
+go get -u github.com/go-kratos/kratos/registry/kube/v2
+```
+
+## Nacos
+```shell
+go get -u github.com/go-kratos/kratos/registry/nacos/v2
+```
\ No newline at end of file


Test patch:
diff --git a/config/config_test.go b/config/config_test.go
index e18bb685..06146587 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -2,7 +2,6 @@ package config
 
 import (
 	"errors"
-	"reflect"
 	"testing"
 
 	"github.com/go-kratos/kratos/v2/log"
@@ -116,7 +115,6 @@ func TestConfig(t *testing.T) {
 		httpAddr       = "0.0.0.0"
 		httpTimeout    = 0.5
 		grpcPort       = 10080
-		enableSSL      = true
 		endpoint1      = "www.aaa.com"
 		databaseDriver = "mysql"
 	)
@@ -160,150 +158,8 @@ func TestConfig(t *testing.T) {
 	assert.Nil(t, err)
 	assert.Equal(t, httpAddr, testConf.Server.Http.Addr)
 	assert.Equal(t, httpTimeout, testConf.Server.Http.Timeout)
-	assert.Equal(t, enableSSL, testConf.Server.Http.EnableSSL)
+	assert.Equal(t, true, testConf.Server.Http.EnableSSL)
 	assert.Equal(t, grpcPort, testConf.Server.GRpc.Port)
 	assert.Equal(t, endpoint1, testConf.Endpoints[0])
 	assert.Equal(t, 2, len(testConf.Endpoints))
 }
-
-func TestDefaultResolver(t *testing.T) {
-	var (
-		portString = "8080"
-		countInt   = 10
-		enableBool = true
-		rateFloat  = 0.9
-	)
-
-	data := map[string]interface{}{
-		"foo": map[string]interface{}{
-			"bar": map[string]interface{}{
-				"notexist": "${NOTEXIST:100}",
-				"port":     "${PORT:8081}",
-				"count":    "${COUNT:0}",
-				"enable":   "${ENABLE:false}",
-				"rate":     "${RATE}",
-				"empty":    "${EMPTY:foobar}",
-				"url":      "${URL:http://example.com}",
-				"array": []interface{}{
-					"${PORT}",
-					map[string]interface{}{"foobar": "${NOTEXIST:8081}"},
-				},
-				"value1": "${test.value}",
-				"value2": "$PORT",
-				"value3": "$PORT:default",
-			},
-		},
-		"test": map[string]interface{}{
-			"value": "foobar",
-		},
-		"PORT":   "8080",
-		"COUNT":  "10",
-		"ENABLE": "true",
-		"RATE":   "0.9",
-		"EMPTY":  "",
-	}
-
-	tests := []struct {
-		name   string
-		path   string
-		expect interface{}
-	}{
-		{
-			name:   "test not exist int env with default",
-			path:   "foo.bar.notexist",
-			expect: 100,
-		},
-		{
-			name:   "test string with default",
-			path:   "foo.bar.port",
-			expect: portString,
-		},
-		{
-			name:   "test int with default",
-			path:   "foo.bar.count",
-			expect: countInt,
-		},
-		{
-			name:   "test bool with default",
-			path:   "foo.bar.enable",
-			expect: enableBool,
-		},
-		{
-			name:   "test float without default",
-			path:   "foo.bar.rate",
-			expect: rateFloat,
-		},
-		{
-			name:   "test empty value with default",
-			path:   "foo.bar.empty",
-			expect: "",
-		},
-		{
-			name:   "test url with default",
-			path:   "foo.bar.url",
-			expect: "http://example.com",
-		},
-		{
-			name:   "test array",
-			path:   "foo.bar.array",
-			expect: []interface{}{portString, map[string]interface{}{"foobar": "8081"}},
-		},
-		{
-			name:   "test ${test.value}",
-			path:   "foo.bar.value1",
-			expect: "foobar",
-		},
-		{
-			name:   "test $value",
-			path:   "foo.bar.value2",
-			expect: portString,
-		},
-		{
-			name:   "test $value:default",
-			path:   "foo.bar.value3",
-			expect: portString + ":default",
-		},
-	}
-
-	for _, test := range tests {
-		t.Run(test.name, func(t *testing.T) {
-			err := defaultResolver(data)
-			assert.NoError(t, err)
-			rd := reader{
-				values: data,
-			}
-			if v, ok := rd.Value(test.path); ok {
-				var actual interface{}
-				switch test.expect.(type) {
-				case int:
-					if actual, err = v.Int(); err == nil {
-						assert.Equal(t, test.expect, int(actual.(int64)), "int value should be equal")
-					}
-				case string:
-					if actual, err = v.String(); err == nil {
-						assert.Equal(t, test.expect, actual, "string value should be equal")
-					}
-				case bool:
-					if actual, err = v.Bool(); err == nil {
-						assert.Equal(t, test.expect, actual, "bool value should be equal")
-					}
-				case float64:
-					if actual, err = v.Float(); err == nil {
-						assert.Equal(t, test.expect, actual, "float64 value should be equal")
-					}
-				default:
-					actual = v.Load()
-					if !reflect.DeepEqual(test.expect, actual) {
-						t.Logf("expect: %#v, actural: %#v", test.expect, actual)
-						t.Fail()
-					}
-				}
-				if err != nil {
-					t.Error(err)
-				}
-			} else {
-				t.Error("value path not found")
-			}
-		})
-	}
-}
diff --git a/config/env/env_test.go b/config/env/env_test.go
index 910e6a17..a7d49ef9 100644
--- a/config/env/env_test.go
+++ b/config/env/env_test.go
@@ -16,7 +16,7 @@ const _testJSON = `
 {
     "test":{
         "server":{
-			"name":"$SERVICE_NAME",
+			"name":"${SERVICE_NAME}",
             "addr":"${ADDR:127.0.0.1}",
             "port":"${PORT:8080}"
         }
diff --git a/config/options_test.go b/config/options_test.go
index c3769166..dd6bc538 100644
--- a/config/options_test.go
+++ b/config/options_test.go
@@ -1,6 +1,7 @@
 package config
 
 import (
+	"reflect"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -35,3 +36,150 @@ func TestDefaultDecoder(t *testing.T) {
 		},
 	}, target)
 }
+
+func TestDefaultResolver(t *testing.T) {
+	var (
+		portString = "8080"
+		countInt   = 10
+		rateFloat  = 0.9
+	)
+
+	data := map[string]interface{}{
+		"foo": map[string]interface{}{
+			"bar": map[string]interface{}{
+				"notexist": "${NOTEXIST:100}",
+				"port":     "${PORT:8081}",
+				"count":    "${COUNT:0}",
+				"enable":   "${ENABLE:false}",
+				"rate":     "${RATE}",
+				"empty":    "${EMPTY:foobar}",
+				"url":      "${URL:http://example.com}",
+				"array": []interface{}{
+					"${PORT}",
+					map[string]interface{}{"foobar": "${NOTEXIST:8081}"},
+				},
+				"value1": "${test.value}",
+				"value2": "$PORT",
+				"value3": "abc${PORT}foo${COUNT}bar",
+				"value4": "${foo${bar}}",
+			},
+		},
+		"test": map[string]interface{}{
+			"value": "foobar",
+		},
+		"PORT":   "8080",
+		"COUNT":  "10",
+		"ENABLE": "true",
+		"RATE":   "0.9",
+		"EMPTY":  "",
+	}
+
+	tests := []struct {
+		name   string
+		path   string
+		expect interface{}
+	}{
+		{
+			name:   "test not exist int env with default",
+			path:   "foo.bar.notexist",
+			expect: 100,
+		},
+		{
+			name:   "test string with default",
+			path:   "foo.bar.port",
+			expect: portString,
+		},
+		{
+			name:   "test int with default",
+			path:   "foo.bar.count",
+			expect: countInt,
+		},
+		{
+			name:   "test bool with default",
+			path:   "foo.bar.enable",
+			expect: true,
+		},
+		{
+			name:   "test float without default",
+			path:   "foo.bar.rate",
+			expect: rateFloat,
+		},
+		{
+			name:   "test empty value with default",
+			path:   "foo.bar.empty",
+			expect: "",
+		},
+		{
+			name:   "test url with default",
+			path:   "foo.bar.url",
+			expect: "http://example.com",
+		},
+		{
+			name:   "test array",
+			path:   "foo.bar.array",
+			expect: []interface{}{portString, map[string]interface{}{"foobar": "8081"}},
+		},
+		{
+			name:   "test ${test.value}",
+			path:   "foo.bar.value1",
+			expect: "foobar",
+		},
+		{
+			name:   "test $PORT",
+			path:   "foo.bar.value2",
+			expect: "$PORT",
+		},
+		{
+			name:   "test abc${PORT}foo${COUNT}bar",
+			path:   "foo.bar.value3",
+			expect: "abc8080foo10bar",
+		},
+		{
+			name:   "test ${foo${bar}}",
+			path:   "foo.bar.value4",
+			expect: "}",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			err := defaultResolver(data)
+			assert.NoError(t, err)
+			rd := reader{
+				values: data,
+			}
+			if v, ok := rd.Value(test.path); ok {
+				var actual interface{}
+				switch test.expect.(type) {
+				case int:
+					if actual, err = v.Int(); err == nil {
+						assert.Equal(t, test.expect, int(actual.(int64)), "int value should be equal")
+					}
+				case string:
+					if actual, err = v.String(); err == nil {
+						assert.Equal(t, test.expect, actual, "string value should be equal")
+					}
+				case bool:
+					if actual, err = v.Bool(); err == nil {
+						assert.Equal(t, test.expect, actual, "bool value should be equal")
+					}
+				case float64:
+					if actual, err = v.Float(); err == nil {
+						assert.Equal(t, test.expect, actual, "float64 value should be equal")
+					}
+				default:
+					actual = v.Load()
+					if !reflect.DeepEqual(test.expect, actual) {
+						t.Logf("expect: %#v, actural: %#v", test.expect, actual)
+						t.Fail()
+					}
+				}
+				if err != nil {
+					t.Error(err)
+				}
+			} else {
+				t.Error("value path not found")
+			}
+		})
+	}
+}
diff --git a/encoding/form/form_test.go b/encoding/form/form_test.go
index 2022910a..c58d8a6d 100644
--- a/encoding/form/form_test.go
+++ b/encoding/form/form_test.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/go-kratos/kratos/v2/encoding"
 	"github.com/go-kratos/kratos/v2/internal/testproto/complex"
+	testproto "github.com/go-kratos/kratos/v2/internal/testproto/encoding"
 	"github.com/stretchr/testify/require"
 )
 
@@ -31,6 +32,14 @@ func TestFormCodecMarshal(t *testing.T) {
 	content, err = encoding.GetCodec(contentType).Marshal(req)
 	require.NoError(t, err)
 	require.Equal(t, []byte("username=kratos"), content)
+
+	m := testproto.TestModel{
+		Id:   1,
+		Name: "kratos",
+	}
+	content, err = encoding.GetCodec(contentType).Marshal(m)
+	require.NoError(t, err)
+	require.Equal(t, []byte("id=1&name=kratos"), content)
 }
 
 func TestFormCodecUnmarshal(t *testing.T) {
diff --git a/encoding/json/json_test.go b/encoding/json/json_test.go
index 06d80ee2..e0a5e4fd 100644
--- a/encoding/json/json_test.go
+++ b/encoding/json/json_test.go
@@ -4,6 +4,8 @@ import (
 	"bytes"
 	"strings"
 	"testing"
+
+	testproto "github.com/go-kratos/kratos/v2/internal/testproto/encoding"
 )
 
 type testEmbed struct {
@@ -32,13 +34,17 @@ func TestJSON_Marshal(t *testing.T) {
 			input:  &testMessage{Field1: "a", Field2: "b", Field3: "c"},
 			expect: `{"a":"a","b":"b","c":"c"}`,
 		},
+		{
+			input:  &testproto.TestModel{Id: 1, Name: "go-kratos", Hobby: []string{"1", "2"}},
+			expect: `{"id":"1","name":"go-kratos","hobby":["1","2"],"attrs":{}}`,
+		},
 	}
 	for _, v := range tests {
 		data, err := (codec{}).Marshal(v.input)
 		if err != nil {
 			t.Errorf("marshal(%#v): %s", v.input, err)
 		}
-		if got, want := string(data), v.expect; got != want {
+		if got, want := string(data), v.expect; strings.ReplaceAll(got, " ", "") != want {
 			if strings.Contains(want, "\n") {
 				t.Errorf("marshal(%#v):\nHAVE:\n%s\nWANT:\n%s", v.input, got, want)
 			} else {
@@ -50,6 +56,7 @@ func TestJSON_Marshal(t *testing.T) {
 
 func TestJSON_Unmarshal(t *testing.T) {
 	p := &testMessage{}
+	p2 := &testproto.TestModel{}
 	tests := []struct {
 		input  string
 		expect interface{}
@@ -62,6 +69,10 @@ func TestJSON_Unmarshal(t *testing.T) {
 			input:  `{"a":"a","b":"b","c":"c"}`,
 			expect: &p,
 		},
+		{
+			input:  `{"id":1,"name":"kratos"}`,
+			expect: &p2,
+		},
 	}
 	for _, v := range tests {
 		want := []byte(v.input)
diff --git a/encoding/proto/proto_test.go b/encoding/proto/proto_test.go
new file mode 100644
index 00000000..806a118c
--- /dev/null
+++ b/encoding/proto/proto_test.go
@@ -0,0 +1,35 @@
+package proto
+
+import (
+	"github.com/stretchr/testify/assert"
+	"testing"
+
+	testproto "github.com/go-kratos/kratos/v2/internal/testproto/encoding"
+)
+
+func TestName(t *testing.T) {
+	c := new(codec)
+	assert.Equal(t, c.Name(), "proto")
+}
+
+func TestCodec(t *testing.T) {
+	c := new(codec)
+
+	model := testproto.TestModel{
+		Id:    1,
+		Name:  "kratos",
+		Hobby: []string{"study", "eat", "play"},
+	}
+
+	m, err := c.Marshal(&model)
+	assert.Nil(t, err)
+
+	var res testproto.TestModel
+
+	err = c.Unmarshal(m, &res)
+	assert.Nil(t, err)
+
+	assert.Equal(t, res.Id, model.Id)
+	assert.Equal(t, res.Name, model.Name)
+	assert.Equal(t, res.Hobby, model.Hobby)
+}
diff --git a/internal/context/context_test.go b/internal/context/context_test.go
index 563c8c69..19d5b35d 100644
--- a/internal/context/context_test.go
+++ b/internal/context/context_test.go
@@ -2,6 +2,7 @@ package context
 
 import (
 	"context"
+	"reflect"
 	"testing"
 	"time"
 
@@ -29,6 +30,18 @@ func TestContext(t *testing.T) {
 	t.Log(value2)
 }
 
+func TestMerge2(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	ctx1 := context.WithValue(context.Background(), "go-kratos", "https://github.com/go-kratos/")
+	ctx2 := context.WithValue(ctx, "kratos", "https://go-kratos.dev/")
+
+	ctx, cancel = Merge(ctx1, ctx2)
+	defer cancel()
+
+	t.Log(ctx)
+}
+
 func TestErr(t *testing.T) {
 	ctx1, cancel := context.WithTimeout(context.Background(), time.Microsecond)
 	defer cancel()
@@ -83,6 +96,23 @@ func TestWait(t *testing.T) {
 	mc.wait()
 	t.Log(mc.doneErr)
 	assert.Equal(t, mc.doneErr, context.Canceled)
+
+	ctx2, cancel2 := context.WithCancel(context.Background())
+
+	mc = &mergeCtx{
+		parent1:  ctx2,
+		parent2:  context.Background(),
+		done:     make(chan struct{}),
+		cancelCh: make(chan struct{}),
+	}
+	go func() {
+		time.Sleep(time.Millisecond * 50)
+		cancel2()
+	}()
+
+	mc.wait()
+	t.Log(mc.doneErr)
+	assert.Equal(t, mc.doneErr, context.Canceled)
 }
 
 func TestCancel(t *testing.T) {
@@ -96,3 +126,105 @@ func TestCancel(t *testing.T) {
 
 	assert.Equal(t, <-mc.cancelCh, struct{}{})
 }
+
+func Test_mergeCtx_Deadline(t *testing.T) {
+	type fields struct {
+		parent1Timeout time.Time
+		parent2Timeout time.Time
+	}
+	tests := []struct {
+		name   string
+		fields fields
+		want1  bool
+	}{
+		{
+			name:   "parent1 not deadline",
+			fields: fields{time.Time{}, time.Now().Add(time.Second * 100)},
+			want1:  true,
+		},
+		{
+			name:   "parent2 not deadline",
+			fields: fields{time.Now().Add(time.Second * 100), time.Time{}},
+			want1:  true,
+		},
+		{
+			name:   " parent1 parent2 not deadline",
+			fields: fields{time.Time{}, time.Time{}},
+			want1:  false,
+		},
+		{
+			name:   " parent1 < parent2",
+			fields: fields{time.Now().Add(time.Second * 100), time.Now().Add(time.Second * 200)},
+			want1:  true,
+		},
+		{
+			name:   " parent1 > parent2",
+			fields: fields{time.Now().Add(time.Second * 100), time.Now().Add(time.Second * 50)},
+			want1:  true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+
+			var parent1, parent2 context.Context
+			var cancel1, cancel2 context.CancelFunc
+			if reflect.DeepEqual(tt.fields.parent1Timeout, time.Time{}) {
+				parent1 = context.Background()
+			} else {
+				parent1, cancel1 = context.WithDeadline(context.Background(), tt.fields.parent1Timeout)
+				defer cancel1()
+			}
+			if reflect.DeepEqual(tt.fields.parent2Timeout, time.Time{}) {
+				parent2 = context.Background()
+			} else {
+				parent2, cancel2 = context.WithDeadline(context.Background(), tt.fields.parent2Timeout)
+				defer cancel2()
+			}
+
+			mc := &mergeCtx{
+				parent1: parent1,
+				parent2: parent2,
+			}
+			got, got1 := mc.Deadline()
+			t.Log(got)
+			if got1 != tt.want1 {
+				t.Errorf("Deadline() got1 = %v, want %v", got1, tt.want1)
+			}
+		})
+	}
+}
+
+func Test_Err2(t *testing.T) {
+	ctx1, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	time.Sleep(time.Millisecond)
+
+	ctx, cancel := Merge(ctx1, context.Background())
+	defer cancel()
+
+	assert.Equal(t, ctx.Err(), nil)
+
+	ctx1, cancel1 := context.WithCancel(context.Background())
+	time.Sleep(time.Millisecond)
+
+	ctx, cancel = Merge(ctx1, context.Background())
+	defer cancel()
+
+	cancel1()
+
+	assert.Equal(t, ctx.Err(), context.Canceled)
+
+	ctx1, cancel1 = context.WithCancel(context.Background())
+	time.Sleep(time.Millisecond)
+
+	ctx, cancel = Merge(context.Background(), ctx1)
+	defer cancel()
+
+	cancel1()
+
+	assert.Equal(t, ctx.Err(), context.Canceled)
+
+	ctx, cancel = Merge(context.Background(), context.Background())
+	cancel()
+	assert.Equal(t, ctx.Err(), context.Canceled)
+}
diff --git a/internal/host/host_test.go b/internal/host/host_test.go
index 930e8c3e..cf866274 100644
--- a/internal/host/host_test.go
+++ b/internal/host/host_test.go
@@ -1,6 +1,7 @@
 package host
 
 import (
+	"github.com/stretchr/testify/assert"
 	"net"
 	"testing"
 )
@@ -76,6 +77,19 @@ func TestExtract(t *testing.T) {
 	}
 }
 
+func TestExtract2(t *testing.T) {
+	addr := "localhost:9001"
+	lis, err := net.Listen("tcp", addr)
+	if err == nil {
+		assert.Nil(t, err)
+	}
+	res, err := Extract(addr, lis)
+	if err == nil {
+		assert.Nil(t, err)
+	}
+	assert.Equal(t, res, "localhost:9001")
+}
+
 func TestPort(t *testing.T) {
 	lis, err := net.Listen("tcp", ":0")
 	if err != nil {
diff --git a/internal/httputil/http_test.go b/internal/httputil/http_test.go
index f6b7ba3e..11b934a3 100644
--- a/internal/httputil/http_test.go
+++ b/internal/httputil/http_test.go
@@ -97,12 +97,12 @@ func TestStatusFromGRPCCode(t *testing.T) {
 func TestContentType(t *testing.T) {
 
 	tests := []struct {
-		name string
+		name    string
 		subtype string
-		want string
+		want    string
 	}{
-		{"kratos","kratos","application/kratos"},
-		{"json","json","application/json"},
+		{"kratos", "kratos", "application/kratos"},
+		{"json", "json", "application/json"},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -111,4 +111,4 @@ func TestContentType(t *testing.T) {
 			}
 		})
 	}
-}
\ No newline at end of file
+}
diff --git a/internal/testproto/complex/complex.pb.go b/internal/testproto/complex/complex.pb.go
index 2e5fef62..61190da7 100644
--- a/internal/testproto/complex/complex.pb.go
+++ b/internal/testproto/complex/complex.pb.go
@@ -178,11 +178,11 @@ func file_complex_proto_rawDescGZIP() []byte {
 
 var file_complex_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
 var file_complex_proto_goTypes = []interface{}{
-	(*Complex)(nil), // 0: testproto.Complex
-	(*Simple)(nil),  // 1: testproto.Simple
+	(*Complex)(nil), // 0: encoding.Complex
+	(*Simple)(nil),  // 1: encoding.Simple
 }
 var file_complex_proto_depIdxs = []int32{
-	1, // 0: testproto.Complex.simple:type_name -> testproto.Simple
+	1, // 0: encoding.Complex.simple:type_name -> encoding.Simple
 	1, // [1:1] is the sub-list for method output_type
 	1, // [1:1] is the sub-list for method input_type
 	1, // [1:1] is the sub-list for extension type_name
diff --git a/internal/testproto/complex/complex.proto b/internal/testproto/complex/complex.proto
index 5a7c951a..61a62139 100644
--- a/internal/testproto/complex/complex.proto
+++ b/internal/testproto/complex/complex.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-option go_package = "github.com/go-kratos/kratos/cmd/protoc-gen-go-http/internal/testproto/complex/;complex";
+option go_package = "github.com/go-kratos/kratos/cmd/protoc-gen-go-http/internal/encoding/complex/;complex";
 
 package testproto;
 
diff --git a/internal/testproto/echo/echo_service.proto b/internal/testproto/echo/echo_service.proto
index c62a533b..319dd8ee 100644
--- a/internal/testproto/echo/echo_service.proto
+++ b/internal/testproto/echo/echo_service.proto
@@ -2,7 +2,7 @@ syntax = "proto3";
 
 package echo;
 
-option go_package = "github.com/go-kratos/kratos/cmd/protoc-gen-go-http/internal/testproto/echo;echo";
+option go_package = "github.com/go-kratos/kratos/cmd/protoc-gen-go-http/internal/encoding/echo;echo";
 
 import "google/api/annotations.proto";
 import "google/protobuf/field_mask.proto";
diff --git a/internal/testproto/echo/stream.proto b/internal/testproto/echo/stream.proto
index 803d5474..f949ec6a 100644
--- a/internal/testproto/echo/stream.proto
+++ b/internal/testproto/echo/stream.proto
@@ -2,7 +2,7 @@ syntax = "proto3";
 
 package echo;
 
-option go_package = "github.com/go-kratos/kratos/cmd/protoc-gen-go-http/internal/testproto/echo;echo";
+option go_package = "github.com/go-kratos/kratos/cmd/protoc-gen-go-http/internal/encoding/echo;echo";
 
 import "google/api/annotations.proto";
 import "google/api/httpbody.proto";
diff --git a/internal/testproto/encoding/test.pb.go b/internal/testproto/encoding/test.pb.go
new file mode 100644
index 00000000..cf3d97cc
--- /dev/null
+++ b/internal/testproto/encoding/test.pb.go
@@ -0,0 +1,177 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.27.1
+// 	protoc        v3.17.3
+// source: encoding/test.proto
+
+package encoding
+
+import (
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+type TestModel struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id    int64             `protobuf:"varint,1,opt,name=id,proto3" json:"id,omitempty"`
+	Name  string            `protobuf:"bytes,2,opt,name=name,proto3" json:"name,omitempty"`
+	Hobby []string          `protobuf:"bytes,3,rep,name=hobby,proto3" json:"hobby,omitempty"`
+	Attrs map[string]string `protobuf:"bytes,4,rep,name=attrs,proto3" json:"attrs,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
+}
+
+func (x *TestModel) Reset() {
+	*x = TestModel{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_encoding_test_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *TestModel) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*TestModel) ProtoMessage() {}
+
+func (x *TestModel) ProtoReflect() protoreflect.Message {
+	mi := &file_encoding_test_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use TestModel.ProtoReflect.Descriptor instead.
+func (*TestModel) Descriptor() ([]byte, []int) {
+	return file_encoding_test_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *TestModel) GetId() int64 {
+	if x != nil {
+		return x.Id
+	}
+	return 0
+}
+
+func (x *TestModel) GetName() string {
+	if x != nil {
+		return x.Name
+	}
+	return ""
+}
+
+func (x *TestModel) GetHobby() []string {
+	if x != nil {
+		return x.Hobby
+	}
+	return nil
+}
+
+func (x *TestModel) GetAttrs() map[string]string {
+	if x != nil {
+		return x.Attrs
+	}
+	return nil
+}
+
+var File_encoding_test_proto protoreflect.FileDescriptor
+
+var file_encoding_test_proto_rawDesc = []byte{
+	0x0a, 0x13, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67, 0x2f, 0x74, 0x65, 0x73, 0x74, 0x2e,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x04, 0x74, 0x65, 0x73, 0x74, 0x22, 0xb3, 0x01, 0x0a, 0x0a,
+	0x74, 0x65, 0x73, 0x74, 0x5f, 0x6d, 0x6f, 0x64, 0x65, 0x6c, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64,
+	0x18, 0x01, 0x20, 0x01, 0x28, 0x03, 0x52, 0x02, 0x69, 0x64, 0x12, 0x12, 0x0a, 0x04, 0x6e, 0x61,
+	0x6d, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x12, 0x14,
+	0x0a, 0x05, 0x68, 0x6f, 0x62, 0x62, 0x79, 0x18, 0x03, 0x20, 0x03, 0x28, 0x09, 0x52, 0x05, 0x68,
+	0x6f, 0x62, 0x62, 0x79, 0x12, 0x31, 0x0a, 0x05, 0x61, 0x74, 0x74, 0x72, 0x73, 0x18, 0x04, 0x20,
+	0x03, 0x28, 0x0b, 0x32, 0x1b, 0x2e, 0x74, 0x65, 0x73, 0x74, 0x2e, 0x74, 0x65, 0x73, 0x74, 0x5f,
+	0x6d, 0x6f, 0x64, 0x65, 0x6c, 0x2e, 0x41, 0x74, 0x74, 0x72, 0x73, 0x45, 0x6e, 0x74, 0x72, 0x79,
+	0x52, 0x05, 0x61, 0x74, 0x74, 0x72, 0x73, 0x1a, 0x38, 0x0a, 0x0a, 0x41, 0x74, 0x74, 0x72, 0x73,
+	0x45, 0x6e, 0x74, 0x72, 0x79, 0x12, 0x10, 0x0a, 0x03, 0x6b, 0x65, 0x79, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x09, 0x52, 0x03, 0x6b, 0x65, 0x79, 0x12, 0x14, 0x0a, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65,
+	0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x05, 0x76, 0x61, 0x6c, 0x75, 0x65, 0x3a, 0x02, 0x38,
+	0x01, 0x42, 0x0d, 0x5a, 0x0b, 0x2e, 0x2e, 0x2f, 0x65, 0x6e, 0x63, 0x6f, 0x64, 0x69, 0x6e, 0x67,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_encoding_test_proto_rawDescOnce sync.Once
+	file_encoding_test_proto_rawDescData = file_encoding_test_proto_rawDesc
+)
+
+func file_encoding_test_proto_rawDescGZIP() []byte {
+	file_encoding_test_proto_rawDescOnce.Do(func() {
+		file_encoding_test_proto_rawDescData = protoimpl.X.CompressGZIP(file_encoding_test_proto_rawDescData)
+	})
+	return file_encoding_test_proto_rawDescData
+}
+
+var file_encoding_test_proto_msgTypes = make([]protoimpl.MessageInfo, 2)
+var file_encoding_test_proto_goTypes = []interface{}{
+	(*TestModel)(nil), // 0: test.test_model
+	nil,               // 1: test.test_model.AttrsEntry
+}
+var file_encoding_test_proto_depIdxs = []int32{
+	1, // 0: test.test_model.attrs:type_name -> test.test_model.AttrsEntry
+	1, // [1:1] is the sub-list for method output_type
+	1, // [1:1] is the sub-list for method input_type
+	1, // [1:1] is the sub-list for extension type_name
+	1, // [1:1] is the sub-list for extension extendee
+	0, // [0:1] is the sub-list for field type_name
+}
+
+func init() { file_encoding_test_proto_init() }
+func file_encoding_test_proto_init() {
+	if File_encoding_test_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_encoding_test_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*TestModel); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_encoding_test_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   2,
+			NumExtensions: 0,
+			NumServices:   0,
+		},
+		GoTypes:           file_encoding_test_proto_goTypes,
+		DependencyIndexes: file_encoding_test_proto_depIdxs,
+		MessageInfos:      file_encoding_test_proto_msgTypes,
+	}.Build()
+	File_encoding_test_proto = out.File
+	file_encoding_test_proto_rawDesc = nil
+	file_encoding_test_proto_goTypes = nil
+	file_encoding_test_proto_depIdxs = nil
+}
diff --git a/internal/testproto/encoding/test.proto b/internal/testproto/encoding/test.proto
new file mode 100644
index 00000000..de02c783
--- /dev/null
+++ b/internal/testproto/encoding/test.proto
@@ -0,0 +1,12 @@
+syntax = "proto3";
+
+package test;
+
+option go_package = "../encoding";
+
+message test_model {
+  int64 id = 1;
+  string name = 2;
+  repeated string hobby = 3;
+  map<string, string> attrs = 4;
+}
\ No newline at end of file
diff --git a/middleware/metrics/metrics_test.go b/middleware/metrics/metrics_test.go
new file mode 100644
index 00000000..10f5bfe3
--- /dev/null
+++ b/middleware/metrics/metrics_test.go
@@ -0,0 +1,18 @@
+package metrics
+
+import (
+	"context"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestMetrics(t *testing.T) {
+	next := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return req.(string) + "https://go-kratos.dev", nil
+	}
+	_, err := Server()(next)(context.Background(), "test:")
+	assert.Equal(t, err, nil)
+
+	_, err = Client()(next)(context.Background(), "test:")
+	assert.Equal(t, err, nil)
+}
diff --git a/middleware/recovery/recovery_test.go b/middleware/recovery/recovery_test.go
index 4dc0b788..11a9cacf 100644
--- a/middleware/recovery/recovery_test.go
+++ b/middleware/recovery/recovery_test.go
@@ -2,7 +2,11 @@ package recovery
 
 import (
 	"context"
+	"fmt"
 	"testing"
+
+	"github.com/go-kratos/kratos/v2/errors"
+	"github.com/go-kratos/kratos/v2/log"
 )
 
 func TestOnce(t *testing.T) {
@@ -15,6 +19,19 @@ func TestOnce(t *testing.T) {
 	next := func(ctx context.Context, req interface{}) (interface{}, error) {
 		panic("panic reason")
 	}
-	_, e := Recovery()(next)(context.Background(), "panic")
+	_, e := Recovery(WithLogger(log.DefaultLogger))(next)(context.Background(), "panic")
 	t.Logf("succ and reason is %v", e)
 }
+
+func TestNotPanic(t *testing.T) {
+	next := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return req.(string) + "https://go-kratos.dev", nil
+	}
+
+	_, e := Recovery(WithHandler(func(ctx context.Context, req, err interface{}) error {
+		return errors.InternalServer("RECOVERY", fmt.Sprintf("panic triggered: %v", err))
+	}))(next)(context.Background(), "notPanic")
+	if e != nil {
+		t.Errorf("e isn't nil")
+	}
+}
diff --git a/middleware/tracing/metadata_test.go b/middleware/tracing/metadata_test.go
new file mode 100644
index 00000000..22a14993
--- /dev/null
+++ b/middleware/tracing/metadata_test.go
@@ -0,0 +1,89 @@
+package tracing
+
+import (
+	"context"
+	"testing"
+
+	"github.com/go-kratos/kratos/v2"
+	"github.com/go-kratos/kratos/v2/metadata"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/otel/propagation"
+)
+
+func TestMetadata_Inject(t *testing.T) {
+	type args struct {
+		appName string
+		carrier propagation.TextMapCarrier
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "https://go-kratos.dev",
+			args: args{"https://go-kratos.dev", propagation.HeaderCarrier{}},
+			want: "https://go-kratos.dev",
+		},
+		{
+			name: "https://github.com/go-kratos/kratos",
+			args: args{"https://github.com/go-kratos/kratos", propagation.HeaderCarrier{"mode": []string{"test"}}},
+			want: "https://github.com/go-kratos/kratos",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			a := kratos.New(kratos.Name(tt.args.appName))
+			ctx := kratos.NewContext(context.Background(), a)
+			var m = new(Metadata)
+			m.Inject(ctx, tt.args.carrier)
+			if res := tt.args.carrier.Get(serviceHeader); tt.want != res {
+				t.Errorf("Get(serviceHeader) :%s want: %s", res, tt.want)
+			}
+		})
+	}
+}
+
+func TestMetadata_Extract(t *testing.T) {
+	type args struct {
+		parent  context.Context
+		carrier propagation.TextMapCarrier
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "https://go-kratos.dev",
+			args: args{
+				parent:  context.Background(),
+				carrier: propagation.HeaderCarrier{"X-Md-Service-Name": []string{"https://go-kratos.dev"}},
+			},
+			want: "https://go-kratos.dev",
+		},
+		{
+			name: "https://github.com/go-kratos/kratos",
+			args: args{
+				parent:  metadata.NewServerContext(context.Background(), metadata.Metadata{}),
+				carrier: propagation.HeaderCarrier{"X-Md-Service-Name": []string{"https://github.com/go-kratos/kratos"}},
+			},
+			want: "https://github.com/go-kratos/kratos",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			b := Metadata{}
+			ctx := b.Extract(tt.args.parent, tt.args.carrier)
+			md, ok := metadata.FromServerContext(ctx)
+			assert.Equal(t, ok, true)
+			assert.Equal(t, md.Get(serviceHeader), tt.want)
+		})
+	}
+}
+
+func TestFields(t *testing.T) {
+	b := Metadata{}
+	assert.Equal(t, b.Fields(), []string{"x-md-service-name"})
+}