向用户预发放商品券

1curl -X POST \
2  https://api.mch.weixin.qq.com/brand/marketing/product-coupon/users/oh-394z-6CGkNoJrsDLTTUKiAnp4/pre-send-coupon \
3  -H "Authorization: WECHATPAY-BRAND-SHA256-RSA2048 brand_id=\"XXXX\",..." \
4  -H "Accept: application/json" \
5  -H "Wechatpay-Serial: PUB_KEY_ID_XXXX"  \
6  -H "Content-Type: application/json" \
7  -d '{
8    "product_coupon_id" : "200000001",
9    "stock_id" : "100232301",
10    "coupon_code" : "123446565767",
11    "appid" : "wx233544546545989",
12    "send_request_no" : "34657_20250101_123456",
13    "attach" : "example_attach"
14  }'
15

1package com.java.demo;
2
3import com.java.utils.WXPayBrandUtility; // 引用微信支付工具库，参考：https://pay.weixin.qq.com/doc/brand/4015826861
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 * 向用户预发放商品券
24 */
25public class PreSendUserProductCoupon {
26  private static String HOST = "https://api.mch.weixin.qq.com";
27  private static String METHOD = "POST";
28  private static String PATH = "/brand/marketing/product-coupon/users/{openid}/pre-send-coupon";
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/brand/4015415289
32    PreSendUserProductCoupon client = new PreSendUserProductCoupon(
33      "xxxxxxxx",                    // 品牌ID，是由微信支付系统生成并分配给每个品牌方的唯一标识符，品牌ID获取方式参考 https://pay.weixin.qq.com/doc/brand/4015415289
34      "1DDE55AD98Exxxxxxxxxx",         // 品牌API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/brand/4015407570
35      "/path/to/apiclient_key.pem",     // 品牌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/brand/4015453439
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    PreSendUserProductCouponRequest request = new PreSendUserProductCouponRequest();
41    request.openid = "oh-394z-6CGkNoJrsDLTTUKiAnp4";
42    request.productCouponId = "200000001";
43    request.stockId = "100232301";
44    request.couponCode = "123446565767";
45    request.appid = "wx233544546545989";
46    request.sendRequestNo = "34657_20250101_123456";
47    request.attach = "example_attach";
48    try {
49      PreSendUserProductCouponResponse response = client.run(request);
50        // TODO: 请求成功，继续业务逻辑
51        System.out.println(response);
52    } catch (WXPayBrandUtility.ApiException e) {
53        // TODO: 请求失败，根据状态码执行不同的逻辑
54        e.printStackTrace();
55    }
56  }
57
58  public PreSendUserProductCouponResponse run(PreSendUserProductCouponRequest request) {
59    String uri = PATH;
60    uri = uri.replace("{openid}", WXPayBrandUtility.urlEncode(request.openid));
61    String reqBody = WXPayBrandUtility.toJson(request);
62
63    Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
64    reqBuilder.addHeader("Accept", "application/json");
65    reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
66    reqBuilder.addHeader("Authorization", WXPayBrandUtility.buildAuthorization(brand_id, certificateSerialNo,privateKey, METHOD, uri, reqBody));
67    reqBuilder.addHeader("Content-Type", "application/json");
68    RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqBody);
69    reqBuilder.method(METHOD, requestBody);
70    Request httpRequest = reqBuilder.build();
71
72    // 发送HTTP请求
73    OkHttpClient client = new OkHttpClient.Builder().build();
74    try (Response httpResponse = client.newCall(httpRequest).execute()) {
75      String respBody = WXPayBrandUtility.extractBody(httpResponse);
76      if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
77        // 2XX 成功，验证应答签名
78        WXPayBrandUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey,
79            httpResponse.headers(), respBody);
80
81        // 从HTTP应答报文构建返回数据
82        return WXPayBrandUtility.fromJson(respBody, PreSendUserProductCouponResponse.class);
83      } else {
84        throw new WXPayBrandUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
85      }
86    } catch (IOException e) {
87      throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
88    }
89  }
90
91  private final String brand_id;
92  private final String certificateSerialNo;
93  private final PrivateKey privateKey;
94  private final String wechatPayPublicKeyId;
95  private final PublicKey wechatPayPublicKey;
96
97  public PreSendUserProductCoupon(String brand_id, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
98    this.brand_id = brand_id;
99    this.certificateSerialNo = certificateSerialNo;
100    this.privateKey = WXPayBrandUtility.loadPrivateKeyFromPath(privateKeyFilePath);
101    this.wechatPayPublicKeyId = wechatPayPublicKeyId;
102    this.wechatPayPublicKey = WXPayBrandUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
103  }
104
105  public static class PreSendUserProductCouponRequest {
106    @SerializedName("product_coupon_id")
107    public String productCouponId;
108  
109    @SerializedName("stock_id")
110    public String stockId;
111  
112    @SerializedName("coupon_code")
113    public String couponCode;
114  
115    @SerializedName("appid")
116    public String appid;
117  
118    @SerializedName("openid")
119    @Expose(serialize = false)
120    public String openid;
121  
122    @SerializedName("send_request_no")
123    public String sendRequestNo;
124  
125    @SerializedName("attach")
126    public String attach;
127  }
128  
129  public static class PreSendUserProductCouponResponse {
130    @SerializedName("token")
131    public String token;
132  }
133  
134}
135

1package main
2
3import (
4	"bytes"
5	"demo/wxpay_brand_utility" // 引用微信支付工具库，参考 https://pay.weixin.qq.com/doc/brand/4015826866
6	"encoding/json"
7	"fmt"
8	"net/http"
9	"net/url"
10	"strings"
11)
12
13func main() {
14	// TODO: 请准备商户开发必要参数，参考：https://pay.weixin.qq.com/doc/brand/4015415289
15	config, err := wxpay_brand_utility.CreateBrandConfig(
16		"xxxxxxxx",                   // 品牌ID，是由微信支付系统生成并分配给每个品牌方的唯一标识符，品牌ID获取方式参考 https://pay.weixin.qq.com/doc/brand/4015415289
17		"1DDE55AD98Exxxxxxxxxx",      // 品牌API证书序列号，如何获取请参考 https://pay.weixin.qq.com/doc/brand/4015407570
18		"/path/to/apiclient_key.pem", // 品牌API证书私钥文件路径，本地文件路径
19		"PUB_KEY_ID_xxxxxxxxxxxxx",   // 微信支付公钥ID，如何获取请参考 https://pay.weixin.qq.com/doc/brand/4015453439
20		"/path/to/wxp_pub.pem",       // 微信支付公钥文件路径，本地文件路径
21	)
22	if err != nil {
23		fmt.Println(err)
24		return
25	}
26
27	request := &PreSendUserProductCouponRequest{
28		Openid:          wxpay_brand_utility.String("oh-394z-6CGkNoJrsDLTTUKiAnp4"),
29		ProductCouponId: wxpay_brand_utility.String("200000001"),
30		StockId:         wxpay_brand_utility.String("100232301"),
31		CouponCode:      wxpay_brand_utility.String("123446565767"),
32		Appid:           wxpay_brand_utility.String("wx233544546545989"),
33		SendRequestNo:   wxpay_brand_utility.String("34657_20250101_123456"),
34		Attach:          wxpay_brand_utility.String("example_attach"),
35	}
36
37	response, err := PreSendUserProductCoupon(config, request)
38	if err != nil {
39		fmt.Printf("请求失败: %+v\n", err)
40		// TODO: 请求失败，根据状态码执行不同的处理
41		return
42	}
43
44	// TODO: 请求成功，继续业务逻辑
45	fmt.Printf("请求成功: %+v\n", response)
46}
47
48func PreSendUserProductCoupon(config *wxpay_brand_utility.BrandConfig, request *PreSendUserProductCouponRequest) (response *PreSendUserProductCouponResponse, err error) {
49	const (
50		host   = "https://api.mch.weixin.qq.com"
51		method = "POST"
52		path   = "/brand/marketing/product-coupon/users/{openid}/pre-send-coupon"
53	)
54
55	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
56	if err != nil {
57		return nil, err
58	}
59	reqUrl.Path = strings.Replace(reqUrl.Path, "{openid}", url.PathEscape(*request.Openid), -1)
60	reqBody, err := json.Marshal(request)
61	if err != nil {
62		return nil, err
63	}
64	httpRequest, err := http.NewRequest(method, reqUrl.String(), bytes.NewReader(reqBody))
65	if err != nil {
66		return nil, err
67	}
68	httpRequest.Header.Set("Accept", "application/json")
69	httpRequest.Header.Set("Wechatpay-Serial", config.WechatPayPublicKeyId())
70	httpRequest.Header.Set("Content-Type", "application/json")
71	authorization, err := wxpay_brand_utility.BuildAuthorization(config.BrandId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), reqBody)
72	if err != nil {
73		return nil, err
74	}
75	httpRequest.Header.Set("Authorization", authorization)
76
77	client := &http.Client{}
78	httpResponse, err := client.Do(httpRequest)
79	if err != nil {
80		return nil, err
81	}
82	respBody, err := wxpay_brand_utility.ExtractResponseBody(httpResponse)
83	if err != nil {
84		return nil, err
85	}
86	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
87		// 2XX 成功，验证应答签名
88		err = wxpay_brand_utility.ValidateResponse(
89			config.WechatPayPublicKeyId(),
90			config.WechatPayPublicKey(),
91			&httpResponse.Header,
92			respBody,
93		)
94		if err != nil {
95			return nil, err
96		}
97		response := &PreSendUserProductCouponResponse{}
98		if err := json.Unmarshal(respBody, response); err != nil {
99			return nil, err
100		}
101
102		return response, nil
103	} else {
104		return nil, wxpay_brand_utility.NewApiException(
105			httpResponse.StatusCode,
106			httpResponse.Header,
107			respBody,
108		)
109	}
110}
111
112type PreSendUserProductCouponRequest struct {
113	ProductCouponId *string `json:"product_coupon_id,omitempty"`
114	StockId         *string `json:"stock_id,omitempty"`
115	CouponCode      *string `json:"coupon_code,omitempty"`
116	Appid           *string `json:"appid,omitempty"`
117	Openid          *string `json:"openid,omitempty"`
118	SendRequestNo   *string `json:"send_request_no,omitempty"`
119	Attach          *string `json:"attach,omitempty"`
120}
121
122func (o *PreSendUserProductCouponRequest) MarshalJSON() ([]byte, error) {
123	type Alias PreSendUserProductCouponRequest
124	a := &struct {
125		Openid *string `json:"openid,omitempty"`
126		*Alias
127	}{
128		// 序列化时移除非 Body 字段
129		Openid: nil,
130		Alias:  (*Alias)(o),
131	}
132	return json.Marshal(a)
133}
134
135type PreSendUserProductCouponResponse struct {
136	Token *string `json:"token,omitempty"`
137}
138