Gin

 package main

 import  (
   "github.com/gin-gonic/gin"
   "log"
   "net/http"
)

func main() {
   log.Set Flags (log.LstdFlags | log.L short file)
   app := gin.Default()
   app.Use(cors) //这是设置中间件，其目的是响应跨站请求
   app.GET("/api", func(c *gin.Context) {
      view(c)
      c. JSON (200, gin.H{"code": 201}) //根据返回的code值区别不同的请求，201是GET
   })
   app.POST("/api", func(c *gin.Context) {
      view(c)
      c.JSON(200, gin.H{"code": 202}) //根据返回的code值区别不同的请求，202是POST
   })
   app.PUT("/api", func(c *gin.Context) {
      view(c)
      c.JSON(200, gin.H{"code": 203}) //根据返回的code值区别不同的请求，203是PUT
   })
   app.DELETE("/api", func(c *gin.Context) {
      view(c)
      c.JSON(200, gin.H{"code": 204}) //根据返回的code值区别不同的请求，204是DELETE
   })
   _ = app.Run("0.0.0.0:8888")
}

func view(c *gin.Context) {
   _ = c. Request .ParseForm() //解析form数据
   values1 := c.Request.Form //获取到get、post的数据
   log.Println(values1)
   values2 := c.Request.PostForm //只获取到post数据
   log.Println(values2)
}

func cors(c *gin.Context) {
   // Access-Control-Allow-Origin，标识允许哪个域的请求，*代表所有的域请求
   c. Header ("Access-Control-Allow-Origin", "*")
   // 响应首部 Access-Control-Allow-Methods 在对 preflight request.（预检请求）的应答中明确了客户端所要访问的资源允许使用的方法或方法列表。
   // 例如Access-Control-Allow-Methods: POST, GET, OPTIONS，使用*代表所有
   c.Header("Access-Control-Allow-Methods", "*")
   // 响应OPTIONS请求
   if c.Request.Method == "OPTIONS" {
      c.JSON(http.StatusOK,  nil )
   }
}
  

Vue3

 <template>
  <div class="about">
    <h1>This is an about page</h1>
  </div>
  <hr>
<!--  测试GET请求-->
  <button class="btn btn-primary btn-block" @click="test11"> jquery GET</button>
  <!--  测试POST请求-->
  <button class="btn btn-primary btn-block" @click="test12">jqueryPOST</button>
  <!--  测试PUT请求-->
  <button class="btn btn-primary btn-block" @click="test13">jqueryPUT</button>.
  <!--  测试DELETE请求-->
  <button class="btn btn-primary btn-block" @click="test14">jqueryDELETE</button>
  <hr>
</template>
< script >
import $ from "jquery" //引入jquery

export default {
  name: 'AboutView',
  components: {},
  methods: {
    test11() {
      //通过ajax发送GET请求
      $.ajax({
            url: "#34;,
            type: "GET",
            data: {"id": "101"},
            success: result => {
              console.log(result);
            }
          }
      )
    },
    test12() {
      //通过ajax发送post请求
      $.ajax({
            url: "#34;,
            type: "POST",
            data: {"username": "zhangsan", "password": "123456"},
            success: result => {
              console.log(result);
            }
          }
      )
    },
    test13() {
      //通过ajax发送put请求
      $.ajax({
            url: "#34;,
            type: "PUT",
            data: {"username": "zhangsan", "password": "56789"},
            success: result => {
              console.log(result);
            }
          }
      )
    },
    test14() {
      //通过ajax发送delete请求
      $.ajax({
            url: "#34;,
            type: "DELETE",
            data: {"id": "101"},
            success: result => {
              console.log(result);
            }
          }
      )
    },
  }
}
</script>
  

效果

发送请求

结果响应

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