彩虹女神跃长空,Go语言进阶之Go语言高性能Web框架Iris项目实战-用户系统EP03

by Liu Yue/2022-08-22

前文再续，之前一篇我们已经配置好了数据库以及模板引擎，现在可以在逻辑层编写具体业务代码了，博客平台和大多数在线平台一样，都是基于用户账号体系来进行操作，所以我们需要针对用户表完成用户账号的CURD操作。

用户后台模板

首先用户操作逻辑主要在后台展现，所以模板应该单独生成admin文件夹，和前台模板进行逻辑隔离：

cd views
mkdir admin

随后创建用户管理页面模板user.html:

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          <div class="search navbar-right" >
            <form action="/Index_search" method ="GET" class="search_form" >
              <input type="search" name="text" class="search_input" placeholder="Search" required="required" >
            </form>
          </div>


        </div>
      
      </div>
    </nav>
   
    <div class="container">
    <header>
    
    
    </header>
    
    <section>
      <div class="row">
        <div class="col-md-8">
         
          
            <ul class="g-formlist form_li">
                <li>
                    <label class="mark">用户名</label>
                    <div class="write">
                        <input type="text" id="form-name" class="g-text-entry" placeholder="请输入4-10字符" />
                        <span class="tip" data-initial="请输入4-10字符"></span>
                    </div>
                </li>
                <li>
                    <label class="mark">密 码</label>
                    <div class="write">
                        <input type="password" id="form-psw" class="g-text-entry" placeholder="请输入6-30字符" />
                        <span class="tip" data-initial="请输入6-30字符"></span>
                    </div>
                </li>
             
            </ul>

            <button>提交</button>

   

     
          
        </div>
        </div>
        </section>

    </div>

    </div>

  </body>

模板目录架构如下：

└── views
    ├── admin
    │   └── user.html
    ├── index.html
    └── test.html

views根目录模板为前台模板，而admin目录下模板是为后台模板。

同时前端声明username和password变量，分别绑定用户名和密码：

const App = {
            data() {
                return {
                    //用户名
                    username: "",
                    //密码
                    password:""
                };
            },
            created: function() {

                console.log("你好，女神");

            },
            methods: {
            },
        };

接着构造用户添加表单，绑定表单字段：

<ul class="g-formlist form_li">
                <li>
                    <label class="mark">用户名</label>
                    <div class="write">
                        <input v-model="username" type="text" id="form-name" class="g-text-entry" placeholder="请输入4-10字符" />
                        <span class="tip" data-initial="请输入4-10字符"></span>
                    </div>
                </li>
                <li>
                    <label class="mark">密 码</label>
                    <div class="write">
                        <input v-model="password" type="password" id="form-psw" class="g-text-entry" placeholder="请输入6-30字符" />
                        <span class="tip" data-initial="请输入6-30字符"></span>
                    </div>
                </li>
             
            </ul>

            <button @click="submit">提交</button>

这里通过v-model关键字将表单和变量做双向绑定，同时为按钮绑定submit提交方法。

如果愿意，我们也可以针对前端的axios库进行二次封装，增加异步请求方法的复用性：

const myaxios = function (url, type, data = {}) {

return new

    Promise((resolve) => {

        if (type === "get" || type === "delete") {


            axios({

                method: type,
                url: url,
                params: data
            }).then((result) => {

                resolve(result.data);

            });


        } else {

            const params = new URLSearchParams();
            for (var key in data) {
            params.append(key,data[key]);
            }
            axios({

                method: type,
                url: url,
                data:params
            }).then((result) => {

                resolve(result.data);

            });

        }

    });

}

app.config.globalProperties.myaxios = myaxios;

这样，我们就可以随时使用this关键字来向后台发起异步请求了。

接着，编写后台视图，将用户后台模板渲染出来：

app.Get("/admin/user/", func(ctx iris.Context) {

		ctx.View("/admin/user.html")

	})

编译后，访问 http://localhost:5000/admin/user/，如图所示：

用户后台接口

后台接口主要负责接收前端请求的参数，然后根据请求方式类型来决定用户表的操作动作，首先构建添加接口：

app.Post("/admin/user_action/", func(ctx iris.Context) {

		username := ctx.PostValue("username")
		password := ctx.PostValue("password")

		fmt.Println(username, password)

		ret := map[string]string{
			"errcode": "0",
			"msg":     "ok",
		}
		ctx.JSON(ret)

	})

这里使用Post方式匹配路由/admin/user_action/，随后通过ctx结构体的PostValue函数来获取具体的参数key，然后利用ctx.JSON函数将字典序列化为Json，再返回给前端。

前端则使用之前封装好的myaxios内置方法向后端发起异步请求：

submit:function(){


                    this.myaxios("http://localhost:5000/admin/user_action/","post",{"username":this.username,"password":this.password}).then(data => {
        console.log(data)
      });

                }

后台返回：

Now listening on: http://localhost:5000
Application started. Press CTRL+C to shut down.
19:30:58 app         | admin admin

可以看到，后端打印出了前端请求的用户名和密码，接着就是入库操作：

app.Post("/admin/user_action/", func(ctx iris.Context) {

		username := ctx.PostValue("username")
		password := ctx.PostValue("password")

		fmt.Println(username, password)

		user := &model.User{Username: username, Password: password}
		res := db.Create(user)

		fmt.Println(res.Error)

		ret := map[string]string{
			"errcode": "0",
			"msg":     "ok",
		}
		ctx.JSON(ret)

	})

这里初始化结构体变量user后，利用db.Create函数进行入库操作。

随后检查入库结果：

MySQL [irisblog]> select * from user;
+----+---------------------+---------------------+------------+----------+----------+
| id | created_at          | updated_at          | deleted_at | username | password |
+----+---------------------+---------------------+------------+----------+----------+
| 13 | 2022-08-22 19:33:16 | 2022-08-22 19:33:16 | NULL       | admin    | admin    |
+----+---------------------+---------------------+------------+----------+----------+
1 row in set (0.00 sec)

入库操作虽然成功了，但显然，密码不能使用明文，否则不就步CSDN的后尘贻笑大方了吗？

添加md5加密逻辑：

w := md5.New()
io.WriteString(w, password) //将str写入到w中
md5str := fmt.Sprintf("%x", w.Sum(nil))

注意导入"crypto/md5"和"io"两个标准库包。

完成代码：

app.Post("/admin/user_action/", func(ctx iris.Context) {

		username := ctx.PostValue("username")
		password := ctx.PostValue("password")

		fmt.Println(username, password)

		w := md5.New()
		io.WriteString(w, password) //将str写入到w中
		md5str := fmt.Sprintf("%x", w.Sum(nil))

		user := &model.User{Username: username, Password: md5str}
		res := db.Create(user)

		fmt.Println(res.Error)

		ret := map[string]string{
			"errcode": "0",
			"msg":     "ok",
		}
		ctx.JSON(ret)

	})

重新编译后，再次发起请求，检查入库结果：

MySQL [irisblog]> select * from user;
+----+---------------------+---------------------+------------+----------+----------------------------------+
| id | created_at          | updated_at          | deleted_at | username | password                         |
+----+---------------------+---------------------+------------+----------+----------------------------------+
| 16 | 2022-08-22 19:41:40 | 2022-08-22 19:41:40 | NULL       | admin    | 21232f297a57a5a743894a0e4a801fc3 |
+----+---------------------+---------------------+------------+----------+----------------------------------+
1 row in set (0.00 sec)

完成添加逻辑后，可以将用户列表批量查询出来：

app.Get("/admin/userlist/", func(ctx iris.Context) {

		var users []model.User
		res := db.Find(&users)

		ctx.JSON(res)

	})

注意这里声明一个切片嵌套结构users，切片的每一个元素是用户结构体，接口返回：

{
Value: [
{
ID: 16,
CreatedAt: "2022-08-22T19:41:40+08:00",
UpdatedAt: "2022-08-22T19:41:40+08:00",
DeletedAt: null,
Username: "admin",
Password: "21232f297a57a5a743894a0e4a801fc3"
},
{
ID: 17,
CreatedAt: "2022-08-22T19:48:25+08:00",
UpdatedAt: "2022-08-22T19:48:25+08:00",
DeletedAt: null,
Username: "888123",
Password: "202cb962ac59075b964b07152d234b70"
},
{
ID: 18,
CreatedAt: "2022-08-22T19:48:28+08:00",
UpdatedAt: "2022-08-22T19:48:28+08:00",
DeletedAt: null,
Username: "admin123",
Password: "21232f297a57a5a743894a0e4a801fc3"
}
],
Error: null,
RowsAffected: 3
}

随后，前端可以通过异步请求回调赋值将用户列表展示在页面中：

const App = {
            data() {
                return {
                    //用户名
                    username: "",
                    //密码
                    password:"",
                    //用户列表
                    userlist:[]
                };
            },
            created: function() {

                console.log("你好，女神");

                this.get_userlist();

            },
            methods: {

                get_userlist:function(){


                    this.myaxios("http://localhost:5000/admin/userlist/","get",).then(data => {
        console.log(data)
        this.userlist = data.Value
      });


                },
                submit:function(){


                    this.myaxios("http://localhost:5000/admin/user_action/","post",{"username":this.username,"password":this.password}).then(data => {
        console.log(data)
      });

                }

            },
        };

随后，在页面中渲染userlist变量：

<table class="gridtable">

                <tr>

                    <th>用户id</th>
                    <th>用户名</th>
                    <th>添加时间</th>
                </tr>

                <tr v-for="(item,index) in userlist">
                    <td>{{ item.ID }}</td>
                    <td>{{ item.Username }}</td>
                    <td>{{ item.CreatedAt }}</td>
                </tr>



            </table>

请求 http://localhost:5000/admin/user/ 如图所示：

Vue.js+Iris的前后端联调流程就跑通了，当然有些地方还需要封装，比如md5加密环节，后续登录模块也依然会依赖md5包，项目根目录下建立mytool目录：

mkdir mytool
cd mytool

将md5加密封装为函数：

package mytool

import (
	"crypto/md5"
	"fmt"
	"io"
)

func Make_password(password string) string {

	w := md5.New()
	io.WriteString(w, password) //将str写入到w中
	md5str := fmt.Sprintf("%x", w.Sum(nil))

	return md5str

}

随后通过包名进行调用：

md5str := mytool.Make_password(password)

结语

至此，前后端分离的用户系统就构建好了，开发效率层面，基于Go lang的Iris框架并不逊色于任何动态语言框架，语法的简明程度有过之而无不及，性能层面更是不遑多让，该项目已开源在Github：https://github.com/zcxey2911/IrisBlog ，与君共觞，和君共勉。