Golang API 类型 Get

最新推荐文章于 2025-01-11 00:44:40 发布

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本文介绍了一个使用Go语言实现的学生信息API，该API通过HTTP请求返回指定数量的学生记录。通过设置查询参数limit来控制返回的学生数量，最大不超过现有学生记录总数。

package main

import (
	"encoding/json"
	"fmt"
	"net/http"

	"strconv"

	. "github.com/soekchl/myUtils"
)

type Student struct {
	Id    int
	Name  string
	phone string // 不显示
}

var (
	students []Student
)

func main() {

	students = append(students, Student{Id: 1, Name: "Luke1"})
	students = append(students, Student{Id: 2, Name: "Luke2"})
	students = append(students, Student{Id: 3, Name: "Luke3"})
	students = append(students, Student{Id: 4, Name: "Luke4"})
	students = append(students, Student{Id: 5, Name: "Luke5"})
	students = append(students, Student{Id: 6, Name: "Luke6"})

	http.HandleFunc("/", get)
	Notice("开始监听：8080端口")
	if err := http.ListenAndServe(":8088", nil); err != nil {
		Error("接口服务器开启失败！", err)
	}
}

func get(w http.ResponseWriter, r *http.Request) {
	limit, _ := strconv.Atoi(r.FormValue("limit"))
	if limit < 1 || limit > len(students) {
		limit = len(students)
	}

	data, err := json.Marshal(students[:limit])
	if err != nil {
		Error("数据解析错误！", err)
		fmt.Fprintf(w, "数据解析错误！")
		return
	}
	fmt.Fprintf(w, string(data))
}

监听 8088 端口调用 http://localhost:8088/?limit=3