Fehlerbehandlung im Golang-Gin-Framework

func hello(name string) (str string, err error) {
	if name == "" {
		err = errors.New("name 不能为空")
		return
	}
	str = fmt.Sprintf("hello: %s", name)
	return
}

var name = ""
str, err :=  hello(name)
if err != nil {
	fmt.Println(err.Error())
	return
}

package alarm

import (
	"encoding/json"
	"fmt"
	"ginDemo/common/function"
	"path/filepath"
	"runtime"
	"strings"
)

type errorString struct {
	s string
}

type errorInfo struct {
	Time     string `json:"time"`
	Alarm    string `json:"alarm"`
	Message  string `json:"message"`
	Filename string `json:"filename"`
	Line     int    `json:"line"`
	Funcname string `json:"funcname"`
}

func (e *errorString) Error() string {
	return e.s
}

func New (text string) error {
	alarm("INFO", text)
	return &errorString{text}
}

// 发邮件
func Email (text string) error {
	alarm("EMAIL", text)
	return &errorString{text}
}

// 发短信
func Sms (text string) error {
	alarm("SMS", text)
	return &errorString{text}
}

// 发微信
func WeChat (text string) error {
	alarm("WX", text)
	return &errorString{text}
}

// 告警方法
func  alarm(level string, str string) {
	// 当前时间
	currentTime := function.GetTimeStr()

	// 定义 文件名、行号、方法名
	fileName, line, functionName := "?", 0 , "?"

	pc, fileName, line, ok := runtime.Caller(2)
	if ok {
		functionName = runtime.FuncForPC(pc).Name()
		functionName = filepath.Ext(functionName)
		functionName = strings.TrimPrefix(functionName, ".")
	}

	var msg = errorInfo {
		Time     : currentTime,
		Alarm    : level,
		Message  : str,
		Filename : fileName,
		Line     : line,
		Funcname : functionName,
	}

	jsons, errs := json.Marshal(msg)

	if errs != nil {
		fmt.Println("json marshal error:", errs)
	}

	errorJsonInfo := string(jsons)

	fmt.Println(errorJsonInfo)

	if level == "EMAIL" {
		// 执行发邮件

	} else if level == "SMS" {
		// 执行发短信

	} else if level == "WX" {
		// 执行发微信

	} else if level == "INFO" {
		// 执行记日志
	}
}

package v1

import (
	"fmt"
	"ginDemo/common/alarm"
	"ginDemo/entity"
	"github.com/gin-gonic/gin"
	"net/http"
)

func AddProduct(c *gin.Context)  {
	// 获取 Get 参数
	name := c.Query("name")

	var res = entity.Result{}

	str, err := hello(name)
	if err != nil {
		res.SetCode(entity.CODE_ERROR)
		res.SetMessage(err.Error())
		c.JSON(http.StatusOK, res)
		c.Abort()
		return
	}

	res.SetCode(entity.CODE_SUCCESS)
	res.SetMessage(str)
	c.JSON(http.StatusOK, res)
}

func hello(name string) (str string, err error) {
	if name == "" {
		err = alarm.WeChat("name 不能为空")
		return
	}
	str = fmt.Sprintf("hello: %s", name)
	return
}

{
    "code": 1,
    "msg": "hello: a",
    "data": null
}

{
    "code": -1,
    "msg": "name 不能为空",
    "data": null
}

{"time":"2019-07-23 22:19:17","alarm":"WX","message":"name 不能为空","filename":"绝对路径/ginDemo/router/v1/product.go","line":33,"funcname":"hello"}

package main

import (
	"fmt"
)

func main() {

	fmt.Println("-- 1 --")

	defer func() {
		if r := recover(); r != nil {
			fmt.Printf("panic: %s\n", r)
		}
		fmt.Println("-- 2 --")
	}()
	
	panic("i am panic")
}

-- 1 --
panic: i am panic
-- 2 --

package main

import (
	"fmt"
)

func main() {

	fmt.Println("-- 1 --")

	defer func() {
		if r := recover(); r != nil {
			fmt.Printf("panic: %s\n", r)
		}
		fmt.Println("-- 2 --")
	}()


	var slice = [] int {1, 2, 3, 4, 5}

	slice[6] = 6
}

-- 1 --
panic: runtime error: index out of range
-- 2 --