Merge pull request #4718 from flycash/refactor-ctx

Refator: Remove methods to web.context.Context

.gitignore

@@ -12,4 +12,6 @@ pkg/_beeTmp2/
 test/tmp/
 core/config/env/pkg/
 
+my save path/
+
 profile.out

CHANGELOG.md

@@ -55,6 +55,7 @@
 - Deprecated BeeMap and replace all usage with `sync.map` [4616](https://github.com/beego/beego/pull/4616)
 - TaskManager support graceful shutdown [4635](https://github.com/beego/beego/pull/4635)
 - Add comments to `web.Config`, rename `RouterXXX` to `CtrlXXX`, define `HandleFunc` [4714](https://github.com/beego/beego/pull/4714)
+- Refactor: Move `BindXXX` and `XXXResp` methods to `context.Context`. [4718](https://github.com/beego/beego/pull/4718)
 - fix bug:reflect.ValueOf(nil) in getFlatParams [4715](https://github.com/beego/beego/pull/4715)
 
 ## Fix Sonar

go.mod

@@ -36,5 +36,7 @@ require (
 	go.etcd.io/etcd/client/v3 v3.5.0
 	golang.org/x/crypto v0.0.0-20210513164829-c07d793c2f9a
 	google.golang.org/grpc v1.38.0
+	google.golang.org/protobuf v1.26.0
 	gopkg.in/yaml.v2 v2.4.0
+	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b
 )

server/web/context/context.go

@@ -27,24 +27,38 @@ import (
 	"crypto/hmac"
 	"crypto/sha256"
 	"encoding/base64"
+	"encoding/json"
+	"encoding/xml"
 	"errors"
 	"fmt"
 	"net"
 	"net/http"
+	"net/url"
+	"reflect"
 	"strconv"
 	"strings"
 	"time"
 
+	"google.golang.org/protobuf/proto"
+	"gopkg.in/yaml.v3"
+
 	"github.com/beego/beego/v2/core/utils"
 	"github.com/beego/beego/v2/server/web/session"
 )
 
 // Commonly used mime-types
 const (
-	ApplicationJSON = "application/json"
-	ApplicationXML  = "application/xml"
-	ApplicationYAML = "application/x-yaml"
-	TextXML         = "text/xml"
+	ApplicationJSON  = "application/json"
+	ApplicationXML   = "application/xml"
+	ApplicationForm  = "application/x-www-form-urlencoded"
+	ApplicationProto = "application/x-protobuf"
+	ApplicationYAML  = "application/x-yaml"
+	TextXML          = "text/xml"
+
+	formatTime      = "15:04:05"
+	formatDate      = "2006-01-02"
+	formatDateTime  = "2006-01-02 15:04:05"
+	formatDateTimeT = "2006-01-02T15:04:05"
 )
 
 // NewContext return the Context with Input and Output
@@ -65,6 +79,108 @@ type Context struct {
 	_xsrfToken     string
 }
 
+func (ctx *Context) Bind(obj interface{}) error {
+	ct, exist := ctx.Request.Header["Content-Type"]
+	if !exist || len(ct) == 0 {
+		return ctx.BindJSON(obj)
+	}
+	i, l := 0, len(ct[0])
+	for i < l && ct[0][i] != ';' {
+		i++
+	}
+	switch ct[0][0:i] {
+	case ApplicationJSON:
+		return ctx.BindJSON(obj)
+	case ApplicationXML, TextXML:
+		return ctx.BindXML(obj)
+	case ApplicationForm:
+		return ctx.BindForm(obj)
+	case ApplicationProto:
+		return ctx.BindProtobuf(obj.(proto.Message))
+	case ApplicationYAML:
+		return ctx.BindYAML(obj)
+	default:
+		return errors.New("Unsupported Content-Type:" + ct[0])
+	}
+}
+
+// Resp sends response based on the Accept Header
+// By default response will be in JSON
+func (ctx *Context) Resp(data interface{}) error {
+	accept := ctx.Input.Header("Accept")
+	switch accept {
+	case ApplicationYAML:
+		return ctx.YamlResp(data)
+	case ApplicationXML, TextXML:
+		return ctx.XMLResp(data)
+	case ApplicationProto:
+		return ctx.ProtoResp(data.(proto.Message))
+	default:
+		return ctx.JSONResp(data)
+	}
+}
+
+func (ctx *Context) JSONResp(data interface{}) error {
+	return ctx.Output.JSON(data, false, false)
+}
+
+func (ctx *Context) XMLResp(data interface{}) error {
+	return ctx.Output.XML(data, false)
+}
+
+func (ctx *Context) YamlResp(data interface{}) error {
+	return ctx.Output.YAML(data)
+}
+
+func (ctx *Context) ProtoResp(data proto.Message) error {
+	return ctx.Output.Proto(data)
+}
+
+// BindYAML only read data from http request body
+func (ctx *Context) BindYAML(obj interface{}) error {
+	return yaml.Unmarshal(ctx.Input.RequestBody, obj)
+}
+
+// BindForm will parse form values to struct via tag.
+func (ctx *Context) BindForm(obj interface{}) error {
+	err := ctx.Request.ParseForm()
+	if err != nil {
+		return err
+	}
+	return ParseForm(ctx.Request.Form, obj)
+}
+
+// BindJSON only read data from http request body
+func (ctx *Context) BindJSON(obj interface{}) error {
+	return json.Unmarshal(ctx.Input.RequestBody, obj)
+}
+
+// BindProtobuf only read data from http request body
+func (ctx *Context) BindProtobuf(obj proto.Message) error {
+	return proto.Unmarshal(ctx.Input.RequestBody, obj)
+}
+
+// BindXML only read data from http request body
+func (ctx *Context) BindXML(obj interface{}) error {
+	return xml.Unmarshal(ctx.Input.RequestBody, obj)
+}
+
+// ParseForm will parse form values to struct via tag.
+func ParseForm(form url.Values, obj interface{}) error {
+	objT := reflect.TypeOf(obj)
+	objV := reflect.ValueOf(obj)
+	if !isStructPtr(objT) {
+		return fmt.Errorf("%v must be  a struct pointer", obj)
+	}
+	objT = objT.Elem()
+	objV = objV.Elem()
+	return parseFormToStruct(form, objT, objV)
+}
+
+func isStructPtr(t reflect.Type) bool {
+	return t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Struct
+}
+
 // Reset initializes Context, BeegoInput and BeegoOutput
 func (ctx *Context) Reset(rw http.ResponseWriter, r *http.Request) {
 	ctx.Request = r
@@ -91,7 +207,7 @@ func (ctx *Context) Abort(status int, body string) {
 
 // WriteString writes a string to response body.
 func (ctx *Context) WriteString(content string) {
-	ctx.ResponseWriter.Write([]byte(content))
+	_, _ = ctx.ResponseWriter.Write([]byte(content))
 }
 
 // GetCookie gets a cookie from a request for a given key.
@@ -124,7 +240,10 @@ func (ctx *Context) GetSecureCookie(Secret, key string) (string, bool) {
 	sig := parts[2]
 
 	h := hmac.New(sha256.New, []byte(Secret))
-	fmt.Fprintf(h, "%s%s", vs, timestamp)
+	_, err := fmt.Fprintf(h, "%s%s", vs, timestamp)
+	if err != nil {
+		return "", false
+	}
 
 	if fmt.Sprintf("%02x", h.Sum(nil)) != sig {
 		return "", false
@@ -138,7 +257,7 @@ func (ctx *Context) SetSecureCookie(Secret, name, value string, others ...interf
 	vs := base64.URLEncoding.EncodeToString([]byte(value))
 	timestamp := strconv.FormatInt(time.Now().UnixNano(), 10)
 	h := hmac.New(sha256.New, []byte(Secret))
-	fmt.Fprintf(h, "%s%s", vs, timestamp)
+	_, _ = fmt.Fprintf(h, "%s%s", vs, timestamp)
 	sig := fmt.Sprintf("%02x", h.Sum(nil))
 	cookie := strings.Join([]string{vs, timestamp, sig}, "|")
 	ctx.Output.Cookie(name, cookie, others...)

server/web/context/form.go

@@ -0,0 +1,189 @@
+// Copyright 2020 beego
+//
+// 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 context
+
+import (
+	"net/url"
+	"reflect"
+	"strconv"
+	"strings"
+	"time"
+)
+
+var (
+	sliceOfInts    = reflect.TypeOf([]int(nil))
+	sliceOfStrings = reflect.TypeOf([]string(nil))
+)
+
+// ParseForm will parse form values to struct via tag.
+// Support for anonymous struct.
+func parseFormToStruct(form url.Values, objT reflect.Type, objV reflect.Value) error {
+	for i := 0; i < objT.NumField(); i++ {
+		fieldV := objV.Field(i)
+		if !fieldV.CanSet() {
+			continue
+		}
+
+		fieldT := objT.Field(i)
+		if fieldT.Anonymous && fieldT.Type.Kind() == reflect.Struct {
+			err := parseFormToStruct(form, fieldT.Type, fieldV)
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		tag, ok := formTagName(fieldT)
+		if !ok {
+			continue
+		}
+
+		value, ok := formValue(tag, form, fieldT)
+		if !ok {
+			continue
+		}
+
+		switch fieldT.Type.Kind() {
+		case reflect.Bool:
+			b, err := parseFormBoolValue(value)
+			if err != nil {
+				return err
+			}
+			fieldV.SetBool(b)
+		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+			x, err := strconv.ParseInt(value, 10, 64)
+			if err != nil {
+				return err
+			}
+			fieldV.SetInt(x)
+		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+			x, err := strconv.ParseUint(value, 10, 64)
+			if err != nil {
+				return err
+			}
+			fieldV.SetUint(x)
+		case reflect.Float32, reflect.Float64:
+			x, err := strconv.ParseFloat(value, 64)
+			if err != nil {
+				return err
+			}
+			fieldV.SetFloat(x)
+		case reflect.Interface:
+			fieldV.Set(reflect.ValueOf(value))
+		case reflect.String:
+			fieldV.SetString(value)
+		case reflect.Struct:
+			if fieldT.Type.String() == "time.Time" {
+				t, err := parseFormTime(value)
+				if err != nil {
+					return err
+				}
+				fieldV.Set(reflect.ValueOf(t))
+			}
+		case reflect.Slice:
+			if fieldT.Type == sliceOfInts {
+				formVals := form[tag]
+				fieldV.Set(reflect.MakeSlice(reflect.SliceOf(reflect.TypeOf(int(1))), len(formVals), len(formVals)))
+				for i := 0; i < len(formVals); i++ {
+					val, err := strconv.Atoi(formVals[i])
+					if err != nil {
+						return err
+					}
+					fieldV.Index(i).SetInt(int64(val))
+				}
+			} else if fieldT.Type == sliceOfStrings {
+				formVals := form[tag]
+				fieldV.Set(reflect.MakeSlice(reflect.SliceOf(reflect.TypeOf("")), len(formVals), len(formVals)))
+				for i := 0; i < len(formVals); i++ {
+					fieldV.Index(i).SetString(formVals[i])
+				}
+			}
+		}
+	}
+	return nil
+}
+
+// nolint
+func parseFormTime(value string) (time.Time, error) {
+	var pattern string
+	if len(value) >= 25 {
+		value = value[:25]
+		pattern = time.RFC3339
+	} else if strings.HasSuffix(strings.ToUpper(value), "Z") {
+		pattern = time.RFC3339
+	} else if len(value) >= 19 {
+		if strings.Contains(value, "T") {
+			pattern = formatDateTimeT
+		} else {
+			pattern = formatDateTime
+		}
+		value = value[:19]
+	} else if len(value) >= 10 {
+		if len(value) > 10 {
+			value = value[:10]
+		}
+		pattern = formatDate
+	} else if len(value) >= 8 {
+		if len(value) > 8 {
+			value = value[:8]
+		}
+		pattern = formatTime
+	}
+	return time.ParseInLocation(pattern, value, time.Local)
+}
+
+func parseFormBoolValue(value string) (bool, error) {
+	if strings.ToLower(value) == "on" || strings.ToLower(value) == "1" || strings.ToLower(value) == "yes" {
+		return true, nil
+	}
+	if strings.ToLower(value) == "off" || strings.ToLower(value) == "0" || strings.ToLower(value) == "no" {
+		return false, nil
+	}
+	return strconv.ParseBool(value)
+}
+
+// nolint
+func formTagName(fieldT reflect.StructField) (string, bool) {
+	tags := strings.Split(fieldT.Tag.Get("form"), ",")
+	var tag string
+	if len(tags) == 0 || tags[0] == "" {
+		tag = fieldT.Name
+	} else if tags[0] == "-" {
+		return "", false
+	} else {
+		tag = tags[0]
+	}
+	return tag, true
+}
+
+func formValue(tag string, form url.Values, fieldT reflect.StructField) (string, bool) {
+	formValues := form[tag]
+	var value string
+	if len(formValues) == 0 {
+		defaultValue := fieldT.Tag.Get("default")
+		if defaultValue != "" {
+			value = defaultValue
+		} else {
+			return "", false
+		}
+	}
+	if len(formValues) == 1 {
+		value = formValues[0]
+		if value == "" {
+			return "", false
+		}
+	}
+	return value, true
+}

server/web/context/output.go

@@ -31,7 +31,8 @@ import (
 	"strings"
 	"time"
 
-	yaml "gopkg.in/yaml.v2"
+	"google.golang.org/protobuf/proto"
+	"gopkg.in/yaml.v2"
 )
 
 // BeegoOutput does work for sending response header.
@@ -154,7 +155,7 @@ func (output *BeegoOutput) Cookie(name string, value string, others ...interface
 			fmt.Fprintf(&b, "; HttpOnly")
 		}
 	}
-	
+
 	// default empty
 	if len(others) > 5 {
 		if v, ok := others[5].(string); ok && len(v) > 0 {
@@ -224,6 +225,19 @@ func (output *BeegoOutput) YAML(data interface{}) error {
 	return output.Body(content)
 }
 
+// Proto writes protobuf to the response body.
+func (output *BeegoOutput) Proto(data proto.Message) error {
+	output.Header("Content-Type", "application/x-protobuf; charset=utf-8")
+	var content []byte
+	var err error
+	content, err = proto.Marshal(data)
+	if err != nil {
+		http.Error(output.Context.ResponseWriter, err.Error(), http.StatusInternalServerError)
+		return err
+	}
+	return output.Body(content)
+}
+
 // JSONP writes jsonp to the response body.
 func (output *BeegoOutput) JSONP(data interface{}, hasIndent bool) error {
 	output.Header("Content-Type", "application/javascript; charset=utf-8")

server/web/controller.go

@@ -17,8 +17,6 @@ package web
 import (
 	"bytes"
 	context2 "context"
-	"encoding/json"
-	"encoding/xml"
 	"errors"
 	"fmt"
 	"html/template"
@@ -32,8 +30,7 @@ import (
 	"strings"
 	"sync"
 
-	"github.com/gogo/protobuf/proto"
-	"gopkg.in/yaml.v2"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/beego/beego/v2/server/web/context"
 	"github.com/beego/beego/v2/server/web/context/param"
@@ -244,49 +241,35 @@ func (c *Controller) HandlerFunc(fnname string) bool {
 // URLMapping register the internal Controller router.
 func (c *Controller) URLMapping() {}
 
+// Bind if the content type is form, we read data from form
+// otherwise, read data from request body
 func (c *Controller) Bind(obj interface{}) error {
-	ct, exist := c.Ctx.Request.Header["Content-Type"]
-	if !exist || len(ct) == 0 {
-		return c.BindJSON(obj)
-	}
-	i, l := 0, len(ct[0])
-	for i < l && ct[0][i] != ';' {
-		i++
-	}
-	switch ct[0][0:i] {
-	case "application/json":
-		return c.BindJSON(obj)
-	case "application/xml", "text/xml":
-		return c.BindXML(obj)
-	case "application/x-www-form-urlencoded":
-		return c.BindForm(obj)
-	case "application/x-protobuf":
-		return c.BindProtobuf(obj)
-	case "application/x-yaml":
-		return c.BindYAML(obj)
-	default:
-		return errors.New("Unsupported Content-Type:" + ct[0])
-	}
+	return c.Ctx.Bind(obj)
 }
 
+// BindYAML only read data from http request body
 func (c *Controller) BindYAML(obj interface{}) error {
-	return yaml.Unmarshal(c.Ctx.Input.RequestBody, obj)
+	return c.Ctx.BindYAML(obj)
 }
 
+// BindForm read data from form
 func (c *Controller) BindForm(obj interface{}) error {
-	return c.ParseForm(obj)
+	return c.Ctx.BindForm(obj)
 }
 
+// BindJSON only read data from http request body
 func (c *Controller) BindJSON(obj interface{}) error {
-	return json.Unmarshal(c.Ctx.Input.RequestBody, obj)
+	return c.Ctx.BindJSON(obj)
 }
 
-func (c *Controller) BindProtobuf(obj interface{}) error {
-	return proto.Unmarshal(c.Ctx.Input.RequestBody, obj.(proto.Message))
+// BindProtobuf only read data from http request body
+func (c *Controller) BindProtobuf(obj proto.Message) error {
+	return c.Ctx.BindProtobuf(obj)
 }
 
+// BindXML only read data from http request body
 func (c *Controller) BindXML(obj interface{}) error {
-	return xml.Unmarshal(c.Ctx.Input.RequestBody, obj)
+	return c.Ctx.BindXML(obj)
 }
 
 // Mapping the method to function
@@ -440,35 +423,23 @@ func (c *Controller) URLFor(endpoint string, values ...interface{}) string {
 }
 
 func (c *Controller) JSONResp(data interface{}) error {
-	c.Data["json"] = data
-	return c.ServeJSON()
+	return c.Ctx.JSONResp(data)
 }
 
 func (c *Controller) XMLResp(data interface{}) error {
-	c.Data["xml"] = data
-	return c.ServeXML()
+	return c.Ctx.XMLResp(data)
 }
 
 func (c *Controller) YamlResp(data interface{}) error {
-	c.Data["yaml"] = data
-	return c.ServeYAML()
+	return c.Ctx.YamlResp(data)
 }
 
 // Resp sends response based on the Accept Header
 // By default response will be in JSON
+// it's different from ServeXXX methods
+// because we don't store the data to Data field
 func (c *Controller) Resp(data interface{}) error {
-	accept := c.Ctx.Input.Header("Accept")
-	switch accept {
-	case context.ApplicationYAML:
-		c.Data["yaml"] = data
-		return c.ServeYAML()
-	case context.ApplicationXML, context.TextXML:
-		c.Data["xml"] = data
-		return c.ServeXML()
-	default:
-		c.Data["json"] = data
-		return c.ServeJSON()
-	}
+	return c.Ctx.Resp(data)
 }
 
 // ServeJSON sends a json response with encoding charset.
@@ -518,11 +489,7 @@ func (c *Controller) Input() (url.Values, error) {
 
 // ParseForm maps input data map to obj struct.
 func (c *Controller) ParseForm(obj interface{}) error {
-	form, err := c.Input()
-	if err != nil {
-		return err
-	}
-	return ParseForm(form, obj)
+	return c.Ctx.BindForm(obj)
 }
 
 // GetString returns the input value by key string or the default value while it's present and input is blank

server/web/controller_test.go

@@ -269,10 +269,10 @@ type respTestCase struct {
 func TestControllerResp(t *testing.T) {
 	// test cases
 	tcs := []respTestCase{
-		{Accept: context.ApplicationJSON, ExpectedContentLength: 18, ExpectedResponse: "{\n  \"foo\": \"bar\"\n}"},
-		{Accept: context.ApplicationXML, ExpectedContentLength: 25, ExpectedResponse: "<S>\n  <foo>bar</foo>\n</S>"},
+		{Accept: context.ApplicationJSON, ExpectedContentLength: 13, ExpectedResponse: `{"foo":"bar"}`},
+		{Accept: context.ApplicationXML, ExpectedContentLength: 21, ExpectedResponse: `<S><foo>bar</foo></S>`},
 		{Accept: context.ApplicationYAML, ExpectedContentLength: 9, ExpectedResponse: "foo: bar\n"},
-		{Accept: "OTHER", ExpectedContentLength: 18, ExpectedResponse: "{\n  \"foo\": \"bar\"\n}"},
+		{Accept: "OTHER", ExpectedContentLength: 13, ExpectedResponse: `{"foo":"bar"}`},
 	}
 
 	for _, tc := range tcs {

server/web/templatefunc.go

@@ -25,13 +25,8 @@ import (
 	"strconv"
 	"strings"
 	"time"
-)
 
-const (
-	formatTime      = "15:04:05"
-	formatDate      = "2006-01-02"
-	formatDateTime  = "2006-01-02 15:04:05"
-	formatDateTimeT = "2006-01-02T15:04:05"
+	"github.com/beego/beego/v2/server/web/context"
 )
 
 // Substr returns the substr from start to length.
@@ -266,165 +261,11 @@ func AssetsCSS(text string) template.HTML {
 	return template.HTML(text)
 }
 
-// ParseForm will parse form values to struct via tag.
-// Support for anonymous struct.
-func parseFormToStruct(form url.Values, objT reflect.Type, objV reflect.Value) error {
-	for i := 0; i < objT.NumField(); i++ {
-		fieldV := objV.Field(i)
-		if !fieldV.CanSet() {
-			continue
-		}
-
-		fieldT := objT.Field(i)
-		if fieldT.Anonymous && fieldT.Type.Kind() == reflect.Struct {
-			err := parseFormToStruct(form, fieldT.Type, fieldV)
-			if err != nil {
-				return err
-			}
-			continue
-		}
-
-		tags := strings.Split(fieldT.Tag.Get("form"), ",")
-		var tag string
-		if len(tags) == 0 || len(tags[0]) == 0 {
-			tag = fieldT.Name
-		} else if tags[0] == "-" {
-			continue
-		} else {
-			tag = tags[0]
-		}
-
-		formValues := form[tag]
-		var value string
-		if len(formValues) == 0 {
-			defaultValue := fieldT.Tag.Get("default")
-			if defaultValue != "" {
-				value = defaultValue
-			} else {
-				continue
-			}
-		}
-		if len(formValues) == 1 {
-			value = formValues[0]
-			if value == "" {
-				continue
-			}
-		}
-
-		switch fieldT.Type.Kind() {
-		case reflect.Bool:
-			if strings.ToLower(value) == "on" || strings.ToLower(value) == "1" || strings.ToLower(value) == "yes" {
-				fieldV.SetBool(true)
-				continue
-			}
-			if strings.ToLower(value) == "off" || strings.ToLower(value) == "0" || strings.ToLower(value) == "no" {
-				fieldV.SetBool(false)
-				continue
-			}
-			b, err := strconv.ParseBool(value)
-			if err != nil {
-				return err
-			}
-			fieldV.SetBool(b)
-		case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
-			x, err := strconv.ParseInt(value, 10, 64)
-			if err != nil {
-				return err
-			}
-			fieldV.SetInt(x)
-		case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
-			x, err := strconv.ParseUint(value, 10, 64)
-			if err != nil {
-				return err
-			}
-			fieldV.SetUint(x)
-		case reflect.Float32, reflect.Float64:
-			x, err := strconv.ParseFloat(value, 64)
-			if err != nil {
-				return err
-			}
-			fieldV.SetFloat(x)
-		case reflect.Interface:
-			fieldV.Set(reflect.ValueOf(value))
-		case reflect.String:
-			fieldV.SetString(value)
-		case reflect.Struct:
-			switch fieldT.Type.String() {
-			case "time.Time":
-				var (
-					t   time.Time
-					err error
-				)
-				if len(value) >= 25 {
-					value = value[:25]
-					t, err = time.ParseInLocation(time.RFC3339, value, time.Local)
-				} else if strings.HasSuffix(strings.ToUpper(value), "Z") {
-					t, err = time.ParseInLocation(time.RFC3339, value, time.Local)
-				} else if len(value) >= 19 {
-					if strings.Contains(value, "T") {
-						value = value[:19]
-						t, err = time.ParseInLocation(formatDateTimeT, value, time.Local)
-					} else {
-						value = value[:19]
-						t, err = time.ParseInLocation(formatDateTime, value, time.Local)
-					}
-				} else if len(value) >= 10 {
-					if len(value) > 10 {
-						value = value[:10]
-					}
-					t, err = time.ParseInLocation(formatDate, value, time.Local)
-				} else if len(value) >= 8 {
-					if len(value) > 8 {
-						value = value[:8]
-					}
-					t, err = time.ParseInLocation(formatTime, value, time.Local)
-				}
-				if err != nil {
-					return err
-				}
-				fieldV.Set(reflect.ValueOf(t))
-			}
-		case reflect.Slice:
-			if fieldT.Type == sliceOfInts {
-				formVals := form[tag]
-				fieldV.Set(reflect.MakeSlice(reflect.SliceOf(reflect.TypeOf(int(1))), len(formVals), len(formVals)))
-				for i := 0; i < len(formVals); i++ {
-					val, err := strconv.Atoi(formVals[i])
-					if err != nil {
-						return err
-					}
-					fieldV.Index(i).SetInt(int64(val))
-				}
-			} else if fieldT.Type == sliceOfStrings {
-				formVals := form[tag]
-				fieldV.Set(reflect.MakeSlice(reflect.SliceOf(reflect.TypeOf("")), len(formVals), len(formVals)))
-				for i := 0; i < len(formVals); i++ {
-					fieldV.Index(i).SetString(formVals[i])
-				}
-			}
-		}
-	}
-	return nil
-}
-
 // ParseForm will parse form values to struct via tag.
 func ParseForm(form url.Values, obj interface{}) error {
-	objT := reflect.TypeOf(obj)
-	objV := reflect.ValueOf(obj)
-	if !isStructPtr(objT) {
-		return fmt.Errorf("%v must be  a struct pointer", obj)
-	}
-	objT = objT.Elem()
-	objV = objV.Elem()
-
-	return parseFormToStruct(form, objT, objV)
+	return context.ParseForm(form, obj)
 }
 
-var (
-	sliceOfInts    = reflect.TypeOf([]int(nil))
-	sliceOfStrings = reflect.TypeOf([]string(nil))
-)
-
 var unKind = map[reflect.Kind]bool{
 	reflect.Uintptr:       true,
 	reflect.Complex64:     true,
@@ -441,10 +282,11 @@ var unKind = map[reflect.Kind]bool{
 
 // RenderForm will render object to form html.
 // obj must be a struct pointer.
+// nolint
 func RenderForm(obj interface{}) template.HTML {
 	objT := reflect.TypeOf(obj)
 	objV := reflect.ValueOf(obj)
-	if !isStructPtr(objT) {
+	if objT.Kind() != reflect.Ptr || objT.Elem().Kind() != reflect.Struct {
 		return template.HTML("")
 	}
 	objT = objT.Elem()
@@ -549,10 +391,6 @@ func parseFormTag(fieldT reflect.StructField) (label, name, fType string, id str
 	return
 }
 
-func isStructPtr(t reflect.Type) bool {
-	return t.Kind() == reflect.Ptr && t.Elem().Kind() == reflect.Struct
-}
-
 // go1.2 added template funcs. begin
 var (
 	errBadComparisonType = errors.New("invalid type for comparison")