APP场景预签约

1curl -X POST \
2  https://api.mch.weixin.qq.com/v3/ecommerce/individual-contracts/pre-entrust-sign/app \
3  -H "Authorization: WECHATPAY2-SHA256-RSA2048 mchid=\"1900000001\",..." \
4  -H "Accept: application/json" \
5  -H "Content-Type: application/json" \
6  -d '{
7    "appid" : "wxd678efh567h23787",
8    "out_contract_code" : "APPLYMENT_00000000001"
9  }'
10

1package com.java.demo;
2
3import com.java.utils.WXPayUtility; // 引用微信支付工具库，参考：https://pay.weixin.qq.com/doc/v3/partner/4014985777
4
5import com.google.gson.annotations.SerializedName;
6import com.google.gson.annotations.Expose;
7import okhttp3.MediaType;
8import okhttp3.OkHttpClient;
9import okhttp3.Request;
10import okhttp3.RequestBody;
11import okhttp3.Response;
12
13import java.io.IOException;
14import java.io.UncheckedIOException;
15import java.security.PrivateKey;
16import java.security.PublicKey;
17import java.util.ArrayList;
18import java.util.HashMap;
19import java.util.List;
20import java.util.Map;
21
22/**
23 * App场景C2C预签约
24 */
25public class PreEntrustSign {
26  private static String HOST = "https://api.mch.weixin.qq.com";
27  private static String METHOD = "POST";
28  private static String PATH = "/v3/ecommerce/individual-contracts/pre-entrust-sign/app";
29
30  public static void main(String[] args) {
31    // TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/v3/partner/4013080340
32    PreEntrustSign client = new PreEntrustSign(
33      "19xxxxxxxx",                    // 商户号，是由微信支付系统生成并分配给每个商户的唯一标识符，商户号获取方式参考 https://pay.weixin.qq.com/doc/v3/partner/4013080340
34      "1DDE55AD98Exxxxxxxxxx",         // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/partner/4013058924
35      "/path/to/apiclient_key.pem",     // 商户API证书私钥文件路径，本地文件路径
36      "PUB_KEY_ID_xxxxxxxxxxxxx",      // 微信支付公钥ID，如何获取请参考 https://pay.weixin.qq.com/doc/v3/partner/4013038589
37      "/path/to/wxp_pub.pem"           // 微信支付公钥文件路径，本地文件路径
38    );
39
40    PreEntrustSignRequest request = new PreEntrustSignRequest();
41    request.appid = "wxd678efh567h23787";
42    request.outContractCode = "APPLYMENT_00000000001";
43    try {
44      PreEntrustSignResponse response = client.run(request);
45        // TODO: 请求成功，继续业务逻辑
46        System.out.println(response);
47    } catch (WXPayUtility.ApiException e) {
48        // TODO: 请求失败，根据状态码执行不同的逻辑
49        e.printStackTrace();
50    }
51  }
52
53  public PreEntrustSignResponse run(PreEntrustSignRequest request) {
54    String uri = PATH;
55    String reqBody = WXPayUtility.toJson(request);
56
57    Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
58    reqBuilder.addHeader("Accept", "application/json");
59    reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
60    reqBuilder.addHeader("Authorization", WXPayUtility.buildAuthorization(mchid, certificateSerialNo,privateKey, METHOD, uri, reqBody));
61    reqBuilder.addHeader("Content-Type", "application/json");
62    RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqBody);
63    reqBuilder.method(METHOD, requestBody);
64    Request httpRequest = reqBuilder.build();
65
66    // 发送HTTP请求
67    OkHttpClient client = new OkHttpClient.Builder().build();
68    try (Response httpResponse = client.newCall(httpRequest).execute()) {
69      String respBody = WXPayUtility.extractBody(httpResponse);
70      if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
71        // 2XX 成功，验证应答签名
72        WXPayUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey,
73            httpResponse.headers(), respBody);
74
75        // 从HTTP应答报文构建返回数据
76        return WXPayUtility.fromJson(respBody, PreEntrustSignResponse.class);
77      } else {
78        throw new WXPayUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
79      }
80    } catch (IOException e) {
81      throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
82    }
83  }
84
85  private final String mchid;
86  private final String certificateSerialNo;
87  private final PrivateKey privateKey;
88  private final String wechatPayPublicKeyId;
89  private final PublicKey wechatPayPublicKey;
90
91  public PreEntrustSign(String mchid, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
92    this.mchid = mchid;
93    this.certificateSerialNo = certificateSerialNo;
94    this.privateKey = WXPayUtility.loadPrivateKeyFromPath(privateKeyFilePath);
95    this.wechatPayPublicKeyId = wechatPayPublicKeyId;
96    this.wechatPayPublicKey = WXPayUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
97  }
98
99  public static class PreEntrustSignRequest {
100    @SerializedName("appid")
101    public String appid;
102  
103    @SerializedName("out_contract_code")
104    public String outContractCode;
105  }
106  
107  public static class PreEntrustSignResponse {
108    @SerializedName("pre_entrustweb_id")
109    public String preEntrustwebId;
110  }
111  
112}
113

1package main
2
3import (
4	"bytes"
5	"demo/wxpay_utility" // 引用微信支付工具库，参考 https://pay.weixin.qq.com/doc/v3/partner/4015119446
6	"encoding/json"
7	"fmt"
8	"net/http"
9	"net/url"
10)
11
12func main() {
13	// TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/v3/partner/4013080340
14	config, err := wxpay_utility.CreateMchConfig(
15		"19xxxxxxxx",                 // 商户号，是由微信支付系统生成并分配给每个商户的唯一标识符，商户号获取方式参考 https://pay.weixin.qq.com/doc/v3/partner/4013080340
16		"1DDE55AD98Exxxxxxxxxx",      // 商户API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/v3/partner/4013058924
17		"/path/to/apiclient_key.pem", // 商户API证书私钥文件路径，本地文件路径
18		"PUB_KEY_ID_xxxxxxxxxxxxx",   // 微信支付公钥ID，如何获取请参考 https://pay.weixin.qq.com/doc/v3/partner/4013038589
19		"/path/to/wxp_pub.pem",       // 微信支付公钥文件路径，本地文件路径
20	)
21	if err != nil {
22		fmt.Println(err)
23		return
24	}
25
26	request := &PreEntrustSignRequest{
27		Appid:           wxpay_utility.String("wxd678efh567h23787"),
28		OutContractCode: wxpay_utility.String("APPLYMENT_00000000001"),
29	}
30
31	response, err := PreEntrustSign(config, request)
32	if err != nil {
33		fmt.Printf("请求失败: %+v\n", err)
34		// TODO: 请求失败，根据状态码执行不同的处理
35		return
36	}
37
38	// TODO: 请求成功，继续业务逻辑
39	fmt.Printf("请求成功: %+v\n", response)
40}
41
42func PreEntrustSign(config *wxpay_utility.MchConfig, request *PreEntrustSignRequest) (response *PreEntrustSignResponse, err error) {
43	const (
44		host   = "https://api.mch.weixin.qq.com"
45		method = "POST"
46		path   = "/v3/ecommerce/individual-contracts/pre-entrust-sign/app"
47	)
48
49	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
50	if err != nil {
51		return nil, err
52	}
53	reqBody, err := json.Marshal(request)
54	if err != nil {
55		return nil, err
56	}
57	httpRequest, err := http.NewRequest(method, reqUrl.String(), bytes.NewReader(reqBody))
58	if err != nil {
59		return nil, err
60	}
61	httpRequest.Header.Set("Accept", "application/json")
62	httpRequest.Header.Set("Wechatpay-Serial", config.WechatPayPublicKeyId())
63	httpRequest.Header.Set("Content-Type", "application/json")
64	authorization, err := wxpay_utility.BuildAuthorization(config.MchId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), reqBody)
65	if err != nil {
66		return nil, err
67	}
68	httpRequest.Header.Set("Authorization", authorization)
69
70	client := &http.Client{}
71	httpResponse, err := client.Do(httpRequest)
72	if err != nil {
73		return nil, err
74	}
75	respBody, err := wxpay_utility.ExtractResponseBody(httpResponse)
76	if err != nil {
77		return nil, err
78	}
79	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
80		// 2XX 成功，验证应答签名
81		err = wxpay_utility.ValidateResponse(
82			config.WechatPayPublicKeyId(),
83			config.WechatPayPublicKey(),
84			&httpResponse.Header,
85			respBody,
86		)
87		if err != nil {
88			return nil, err
89		}
90		response := &PreEntrustSignResponse{}
91		if err := json.Unmarshal(respBody, response); err != nil {
92			return nil, err
93		}
94
95		return response, nil
96	} else {
97		return nil, wxpay_utility.NewApiException(
98			httpResponse.StatusCode,
99			httpResponse.Header,
100			respBody,
101		)
102	}
103}
104
105type PreEntrustSignRequest struct {
106	Appid           *string `json:"appid,omitempty"`
107	OutContractCode *string `json:"out_contract_code,omitempty"`
108}
109
110type PreEntrustSignResponse struct {
111	PreEntrustwebId *string `json:"pre_entrustweb_id,omitempty"`
112}
113