binding

package main

import (
	"bytes"
	"encoding/json"
	"fmt"
	"net/http"
	"strings"

	"github.com/bytedance/go-tagexpr/binding"
	"github.com/henrylee2cn/goutil/httpbody"
)

func main() {
	type InfoRequest struct {
		Name          string   `api:"{path:'name'}"`
		Year          []int    `api:"{query:'year'}"`
		Email         *string  `api:"{body:'email'}{@:email($)}"`
		Friendly      bool     `api:"{body:'friendly'}"`
		Pie           float32  `api:"{body:'pie'}{required:true}"`
		Hobby         []string `api:"{body:'hobby'}"`
		BodyNotFound  *int     `api:"{body:'xxx'}"`
		Authorization string   `api:"{header:'Authorization'}{required:true}{@:$=='Basic 123456'}"`
		SessionID     string   `api:"{cookie:'sessionid'}{required:true}"`
		AutoBody      string
		AutoQuery     string
		AutoNotFound  *string
	}

	args := new(InfoRequest)
	binder := binding.New("api")
	err := binder.BindAndValidate(args, requestExample(), new(testPathParams))

	fmt.Println("bind and validate result:")

	fmt.Printf("error: %v\n", err)

	b, _ := json.MarshalIndent(args, "", "	")
	fmt.Printf("args JSON string:\n%s\n", b)

}

func requestExample() *http.Request {
	contentType, bodyReader, _ := httpbody.NewJSONBody(map[string]interface{}{
		"email":    "henrylee2cn@gmail.com",
		"friendly": true,
		"pie":      3.1415926,
		"hobby":    []string{"Coding", "Mountain climbing"},
		"AutoBody": "autobody_test",
	})
	header := make(http.Header)
	header.Add("Content-Type", contentType)
	header.Add("Authorization", "Basic 123456")
	cookies := []*http.Cookie{
		{Name: "sessionid", Value: "987654"},
	}
	req := newRequest("http://localhost/info/henrylee2cn?year=2018&year=2019&AutoQuery=autoquery_test", header, cookies, bodyReader)
	req.Method = "POST"
	var w bytes.Buffer
	req.Write(&w)
	fmt.Printf("request:\n%s", strings.Replace(w.String(), "\r\n", "\n", -1))

	bodyReader.(*bytes.Reader).Seek(0, 0)
	return req
}

Output:

request:
POST /info/henrylee2cn?year=2018&year=2019&AutoQuery=autoquery_test HTTP/1.1
Host: localhost
User-Agent: Go-http-client/1.1
Transfer-Encoding: chunked
Authorization: Basic 123456
Content-Type: application/json;charset=utf-8
Cookie: sessionid=987654

83
{"AutoBody":"autobody_test","email":"henrylee2cn@gmail.com","friendly":true,"hobby":["Coding","Mountain climbing"],"pie":3.1415926}
0

bind and validate result:
error: <nil>
args JSON string:
{
	"Name": "henrylee2cn",
	"Year": [
		2018,
		2019
	],
	"Email": "henrylee2cn@gmail.com",
	"Friendly": true,
	"Pie": 3.1415925,
	"Hobby": [
		"Coding",
		"Mountain climbing"
	],
	"BodyNotFound": null,
	"Authorization": "Basic 123456",
	"SessionID": "987654",
	"AutoBody": "autobody_test",
	"AutoQuery": "autoquery_test",
	"AutoNotFound": null
}