hd/services/pay/client.go

package pay_service

import (
	"crypto/md5"
	"crypto/tls"
	"crypto/x509"
	"encoding/hex"
	"encoding/xml"
	"errors"
	"fmt"
	"github.com/iGoogle-ink/gopay/v2"
	"hudongzhuanjia/libs/wx"
	"strings"
)

func ClientExtend(bm gopay.BodyMap, url string) ([]byte, error) {

	//bm.Set("appid", wx.Appid)
	//bm.Set("mch_id", wx.Mchid)

	h := md5.New()
	h.Write([]byte(bm.EncodeWeChatSignParams(wx.ApiKey)))
	bm.Set("sign", strings.ToUpper(hex.EncodeToString(h.Sum(nil))))

	certP12, err := Asset("cacert/apiclient_cert.p12")
	if err != nil {
		return nil, err
	}
	certPem, err := Asset("cacert/apiclient_cert.pem")
	if err != nil {
		return nil, err
	}
	keyPem, err := Asset("cacert/apiclient_key.pem")
	if err != nil {
		return nil, err
	}

	pkcsPool := x509.NewCertPool()
	pkcsPool.AppendCertsFromPEM(certP12)
	certificate, err := tls.X509KeyPair(certPem, keyPem)
	if err != nil {
		return nil, fmt.Errorf("tls.LoadX509KeyPair：%s", err)
	}

	tlsConfig := &tls.Config{
		Certificates:       []tls.Certificate{certificate},
		RootCAs:            pkcsPool,
		InsecureSkipVerify: true}

	httpClient := gopay.NewHttpClient()
	httpClient.SetTLSConfig(tlsConfig)

	bs, err := xml.Marshal(bm)
	if err != nil {
		return nil, err
	}

	res, bs, errs := httpClient.Type(gopay.TypeXML).Post(url).SendString(string(bs)).EndBytes()

	if len(errs) > 0 {
		return nil, fmt.Errorf("http client return error: %v", errs[0])
	}

	if res.StatusCode != 200 {
		return nil, fmt.Errorf("HTTP Request Error, StatusCode = %d", res.StatusCode)
	}

	if strings.Contains(string(bs), "HTML") || strings.Contains(string(bs), "html") {
		return nil, errors.New(string(bs))
	}
	return bs, nil
}