初始化

.idea/.gitignore

+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/WeChatSDK.iml

+<?xml version="1.0" encoding="UTF-8"?>
+<module type="WEB_MODULE" version="4">
+  <component name="Go" enabled="true" />
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$" />
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>
\ No newline at end of file

.idea/modules.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/WeChatSDK.iml" filepath="$PROJECT_DIR$/.idea/WeChatSDK.iml" />
+    </modules>
+  </component>
+</project>
\ No newline at end of file

.idea/vcs.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file

core/response/ResponseMiniProgram.go

+package response
+
+type ResponseMiniProgram struct {
+
+	ErrCode int    `json:"errcode"` //错误码
+	ErrMSG  string `json:"errmsg,omitempty"`//错误信息
+}

go.mod

+module "WeChatSDK"
\ No newline at end of file

httpclient/HttpUtil.go

+package httpclient
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+)
+
+// HttpClient 本项目中使用的http客户端
+var HttpClient *http.Client
+
+func init() {
+	HttpClient = &http.Client{}
+	//HttpClient.Timeout = config.Conf.Http.Client.Timeout * time.Millisecond //设置请求超时时间
+}
+
+// Get get方法的http请求，返回原始字符串
+func Get(url string) ([]byte, error) {
+	rep, err := HttpClient.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer rep.Body.Close()
+	data, err := ioutil.ReadAll(rep.Body)
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}
+
+// GetWithHeader get方法的http请求，返回原始字符串
+func GetWithHeader(url string, header *map[string]string) ([]byte, error) {
+	req, err := http.NewRequest("GET", url, nil)
+	if err != nil {
+		return nil, err
+	}
+	//设置header
+	req.Header.Set("Content-Type", "application/json;charset=UTF-8")
+	if header != nil {
+		for k, v := range *header {
+			req.Header.Set(k, v)
+		}
+	}
+	//发送请求
+	rep, err := HttpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer rep.Body.Close()
+
+	//处理返回值
+	data, err := ioutil.ReadAll(rep.Body)
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}
+
+// Post post请求，json
+// url 请求地址
+// header header参数
+// badyParam body参数
+func Post(url string, header *map[string]string, badyParam *interface{}) ([]byte, error) {
+	//处理body参数
+	var bt []byte
+	if badyParam != nil {
+		b, err := json.Marshal(*badyParam)
+		if err != nil {
+			return nil, err
+		}
+		bt = b
+	}
+	//创建post请求
+	req, err := http.NewRequest("POST", url, bytes.NewReader(bt))
+	if err != nil {
+		return nil, err
+	}
+	//设置header
+	req.Header.Set("Content-Type", "application/json;charset=UTF-8")
+	if header != nil {
+		for k, v := range *header {
+			req.Header.Set(k, v)
+		}
+	}
+	//发送请求
+	rep, err := HttpClient.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer rep.Body.Close()
+
+	//处理返回值
+	data, err := ioutil.ReadAll(rep.Body)
+	if err != nil {
+		return nil, err
+	}
+	return data, nil
+}

main.go

+package main
+
+func main() {
+
+}

miniprogram/auth/client.go

+package auth
+
+import (
+	"WeChatSDK/httpclient"
+	"WeChatSDK/miniprogram/auth/response"
+	"encoding/json"
+	"fmt"
+)
+
+type Client struct {
+
+}
+
+func NewClient() *Client {
+	return &Client{}
+}
+
+// Code2Session 登录凭证校验。
+// https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/login/auth.code2Session.html
+func (comp *Client) Code2Session(code string, appId string, secret string) (*response.ResponseCode2Session, error) {
+	result := &response.ResponseCode2Session{}
+	var url = fmt.Sprintf("https://api.weixin.qq.com/sns/jscode2session?appid=%s&secret=%s&js_code=%s&grant_type=authorization_code", appId, secret, code)
+	r,err := httpclient.Get(url)
+	if err != nil{
+		return nil, err
+	}
+	e := json.Unmarshal(r, result)
+	if err != nil{
+		return nil, e
+	}
+	return result, nil
+}

miniprogram/auth/response/responseCode2Session.go

+package response
+
+import (
+	response2 "WeChatSDK/core/response"
+)
+
+type ResponseCode2Session struct {
+	OpenID     string `json:"openid"` //用户唯一标识
+	SessionKey string `json:"session_key"` //会话密钥
+	UnionID    string `json:"unionid"` //用户在开放平台的唯一标识符，若当前小程序已绑定到微信开放平台帐号下会返回，详见 UnionID 机制说明。
+
+	*response2.ResponseMiniProgram
+}