根据业务申请单号查签约信息

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 * 根据业务申请单号查签约信息
24 */
25public class QueryContractsByCode {
26  private static String HOST = "https://api.mch.weixin.qq.com";
27  private static String METHOD = "GET";
28  private static String PATH = "/v3/ecommerce/individual-contracts/out-contract-code/{out_contract_code}";
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    QueryContractsByCode client = new QueryContractsByCode(
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    QueryContractsByCodeRequest request = new QueryContractsByCodeRequest();
41    request.outContractCode = "APPLYMENT_00000000001";
42    request.appid = "wxd678efh567h23787";
43    try {
44      QueryContractsByCodeResponse response = client.run(request);
45
46      // TODO: 请求成功，继续业务逻辑
47      System.out.println(response);
48    } catch (WXPayUtility.ApiException e) {
49      // TODO: 请求失败，根据状态码执行不同的逻辑
50      e.printStackTrace();
51    }
52  }
53
54  public QueryContractsByCodeResponse run(QueryContractsByCodeRequest request) {
55    String uri = PATH;
56    uri = uri.replace("{out_contract_code}", WXPayUtility.urlEncode(request.outContractCode));
57    Map<String, Object> args = new HashMap<>();
58    args.put("appid", request.appid);
59    uri = uri + "?" + WXPayUtility.urlEncode(args);
60
61    Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
62    reqBuilder.addHeader("Accept", "application/json");
63    reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
64    reqBuilder.addHeader("Authorization", WXPayUtility.buildAuthorization(mchid, certificateSerialNo, privateKey, METHOD, uri, null));
65    reqBuilder.method(METHOD, null);
66    Request httpRequest = reqBuilder.build();
67
68    // 发送HTTP请求
69    OkHttpClient client = new OkHttpClient.Builder().build();
70    try (Response httpResponse = client.newCall(httpRequest).execute()) {
71      String respBody = WXPayUtility.extractBody(httpResponse);
72      if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
73        // 2XX 成功，验证应答签名
74        WXPayUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey,
75            httpResponse.headers(), respBody);
76
77        // 从HTTP应答报文构建返回数据
78        return WXPayUtility.fromJson(respBody, QueryContractsByCodeResponse.class);
79      } else {
80        throw new WXPayUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
81      }
82    } catch (IOException e) {
83      throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
84    }
85  }
86
87  private final String mchid;
88  private final String certificateSerialNo;
89  private final PrivateKey privateKey;
90  private final String wechatPayPublicKeyId;
91  private final PublicKey wechatPayPublicKey;
92
93  public QueryContractsByCode(String mchid, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
94    this.mchid = mchid;
95    this.certificateSerialNo = certificateSerialNo;
96    this.privateKey = WXPayUtility.loadPrivateKeyFromPath(privateKeyFilePath);
97    this.wechatPayPublicKeyId = wechatPayPublicKeyId;
98    this.wechatPayPublicKey = WXPayUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
99  }
100
101  public static class QueryContractsByCodeRequest {
102    @SerializedName("appid")
103    @Expose(serialize = false)
104    public String appid;
105  
106    @SerializedName("out_contract_code")
107    @Expose(serialize = false)
108    public String outContractCode;
109  }
110  
111  public static class QueryContractsByCodeResponse {
112    @SerializedName("individual_auth_id")
113    public String individualAuthId;
114  
115    @SerializedName("signed_time")
116    public String signedTime;
117  
118    @SerializedName("auth_state")
119    public AuthState authState;
120  
121    @SerializedName("individual_openid")
122    public String individualOpenid;
123  }
124  
125  public enum AuthState {
126    @SerializedName("AUTHORIZED")
127    AUTHORIZED,
128    @SerializedName("UNAUTHORIZED")
129    UNAUTHORIZED
130  }
131  
132}
133

1package main
2
3import (
4	"demo/wxpay_utility" // 引用微信支付工具库，参考 https://pay.weixin.qq.com/doc/v3/partner/4015119446
5	"encoding/json"
6	"fmt"
7	"net/http"
8	"net/url"
9	"strings"
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 := &QueryContractsByCodeRequest{
27		Appid:           wxpay_utility.String("wxd678efh567h23787"),
28		OutContractCode: wxpay_utility.String("APPLYMENT_00000000001"),
29	}
30
31	response, err := QueryContractsByCode(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 QueryContractsByCode(config *wxpay_utility.MchConfig, request *QueryContractsByCodeRequest) (response *QueryContractsByCodeResponse, err error) {
43	const (
44		host   = "https://api.mch.weixin.qq.com"
45		method = "GET"
46		path   = "/v3/ecommerce/individual-contracts/out-contract-code/{out_contract_code}"
47	)
48
49	reqUrl, err := url.Parse(fmt.Sprintf("%s%s", host, path))
50	if err != nil {
51		return nil, err
52	}
53	reqUrl.Path = strings.Replace(reqUrl.Path, "{out_contract_code}", url.PathEscape(*request.OutContractCode), -1)
54	query := reqUrl.Query()
55	query.Add("appid", *request.Appid)
56	reqUrl.RawQuery = query.Encode()
57	httpRequest, err := http.NewRequest(method, reqUrl.String(), nil)
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	authorization, err := wxpay_utility.BuildAuthorization(config.MchId(), config.CertificateSerialNo(), config.PrivateKey(), method, reqUrl.RequestURI(), nil)
64	if err != nil {
65		return nil, err
66	}
67	httpRequest.Header.Set("Authorization", authorization)
68
69	client := &http.Client{}
70	httpResponse, err := client.Do(httpRequest)
71	if err != nil {
72		return nil, err
73	}
74
75	respBody, err := wxpay_utility.ExtractResponseBody(httpResponse)
76	if err != nil {
77		return nil, err
78	}
79
80	if httpResponse.StatusCode >= 200 && httpResponse.StatusCode < 300 {
81		// 2XX 成功，验证应答签名
82		err = wxpay_utility.ValidateResponse(
83			config.WechatPayPublicKeyId(),
84			config.WechatPayPublicKey(),
85			&httpResponse.Header,
86			respBody,
87		)
88		if err != nil {
89			return nil, err
90		}
91
92		response := &QueryContractsByCodeResponse{}
93		if err := json.Unmarshal(respBody, response); err != nil {
94			return nil, err
95		}
96
97		return response, nil
98	} else {
99		return nil, wxpay_utility.NewApiException(
100			httpResponse.StatusCode,
101			httpResponse.Header,
102			respBody,
103		)
104	}
105}
106
107type QueryContractsByCodeRequest struct {
108	Appid           *string `json:"appid,omitempty"`
109	OutContractCode *string `json:"out_contract_code,omitempty"`
110}
111
112func (o *QueryContractsByCodeRequest) MarshalJSON() ([]byte, error) {
113	type Alias QueryContractsByCodeRequest
114	a := &struct {
115		Appid           *string `json:"appid,omitempty"`
116		OutContractCode *string `json:"out_contract_code,omitempty"`
117		*Alias
118	}{
119		// 序列化时移除非 Body 字段
120		Appid:           nil,
121		OutContractCode: nil,
122		Alias:           (*Alias)(o),
123	}
124	return json.Marshal(a)
125}
126
127type QueryContractsByCodeResponse struct {
128	IndividualAuthId *string    `json:"individual_auth_id,omitempty"`
129	SignedTime       *string    `json:"signed_time,omitempty"`
130	AuthState        *AuthState `json:"auth_state,omitempty"`
131	IndividualOpenid *string    `json:"individual_openid,omitempty"`
132}
133
134type AuthState string
135
136func (e AuthState) Ptr() *AuthState {
137	return &e
138}
139
140const (
141	AUTHSTATE_AUTHORIZED   AuthState = "AUTHORIZED"
142	AUTHSTATE_UNAUTHORIZED AuthState = "UNAUTHORIZED"
143)
144

1curl -X GET \
2  https://api.mch.weixin.qq.com/v3/ecommerce/individual-contracts/out-contract-code/APPLYMENT_00000000001?appid=wxd678efh567h23787 \
3  -H "Authorization: WECHATPAY2-SHA256-RSA2048 mchid=\"1900000001\",..." \
4  -H "Accept: application/json" 
5