gin——使用腾讯云存储图片

一、腾讯云对象存储COS

1. 创建储存桶

然后直接下一步-创建即可。

2. API密钥创建

3. 查看代码中需要的东西

1. 储存桶名称Bucket、所属地域Region
   

2. 密钥APPID、SecretId、SecretKey
   

二、代码

1. 配置文件conf.toml

这里读取配置文件的第三方库是Viper，学习可以查看：viper库快速使用

将上面查看的几个值写入配置文件对应位置即可

[tencentCOS]
# TencentCloud 腾讯云
# 储存桶名称
COS_BUCKET_NAME = ""
# 所属地域
COS_REGION = ""
# 密钥：APPID
COS_APP_ID = ""
# 密钥：SecretId
COS_SECRET_ID = ""
# 密钥：SecretKey
COS_SECRET_KEY = ""
# 此项固定
COS_URL_FORMAT = "http://%s-%s.cos.%s.myqcloud.com"

2. utils/tencent_cloud_cos.go

package util

import (
	"context"
	"fmt"
	"io"
	"log"
	"net/http"
	"net/url"

	"github.com/spf13/viper"
	"github.com/tencentyun/cos-go-sdk-v5"
	"github.com/tencentyun/cos-go-sdk-v5/debug"
)

// getCos
// @Title getCos
// @Description 获取腾讯云Cos
// @Author hyy 2022-03-04 18:39:29
// @Return *cos.Client
func getCos() *cos.Client {
	u, _ := url.Parse(fmt.Sprintf(
		viper.GetString("tencentCOS.COS_URL_FORMAT"),
		viper.Get("tencentCOS.COS_BUCKET_NAME"),
		viper.Get("tencentCOS.COS_APP_ID"),
		viper.Get("tencentCOS.COS_REGION"),
	))
	b := &cos.BaseURL{BucketURL: u}
	c := cos.NewClient(b, &http.Client{
		Transport: &cos.AuthorizationTransport{
			SecretID:  viper.GetString("tencentCOS.COS_SECRET_ID"),
			SecretKey: viper.GetString("tencentCOS.COS_SECRET_KEY"),
			Transport: &debug.DebugRequestTransport{
				RequestHeader:  true,
				RequestBody:    false,
				ResponseHeader: true,
				ResponseBody:   true,
				Writer:         nil,
			},
		},
	})
	return c
}

// CheckErr
// @Title CheckErr
// @Description 检查错误
// @Author hyy 2022-03-04 18:39:49
// @Param err type description
// @Return bool
func CheckErr(err error) bool {
	if err == nil {
		return true
	}
	if cos.IsNotFoundError(err) {
		// WARN
		log.Println("WARN: Resource is not existed")
		return false
	} else if e, ok := cos.IsCOSError(err); ok {
		log.Println(fmt.Sprintf("ERROR: Code: %v\n", e.Code))
		log.Println(fmt.Sprintf("ERROR: Message: %v\n", e.Message))
		log.Println(fmt.Sprintf("ERROR: Resource: %v\n", e.Resource))
		log.Println(fmt.Sprintf("ERROR: RequestID: %v\n", e.RequestID))
		return false
		// ERROR
	} else {
		log.Println(fmt.Sprintf("ERROR: %v\n", err))
		return false
		// ERROR
	}
}

// Upload
// @Title Upload
// @Description "上传文件"
// @Param fileName 文件名
// @return	bool "上传是否成功"
func Upload(fileName string, file io.Reader) string {
	c := getCos()
	_, err := c.Object.Put(context.Background(), fileName, file, nil)
	if CheckErr(err) {
		return fmt.Sprintf(
			viper.GetString("tencentCOS.COS_URL_FORMAT")+"/%v",
			viper.GetString("tencentCOS.COS_BUCKET_NAME"),
			viper.GetString("tencentCOS.COS_APP_ID"),
			viper.GetString("tencentCOS.COS_REGION"),
			fileName,
		)
	}
	return ""
}

// Delete
// @Title Delete
// @Description "删除文件"
// @Param fileName 	string 	"想要删除的文件名 如：xx.png"
// @return	bool "删除是否成功"
func Delete(fileName string) bool {
	c := getCos()
	_, err := c.Object.Delete(context.Background(), fileName, nil)
	return CheckErr(err)
}

3.controller/tencent_cloud_cos_controller.go

package controller

import (
	"ginstudy02/util"
	"github.com/gin-gonic/gin"
	"log"
	"net/http"
)

// Upload
// @Summary Upload
// @Description 腾讯云上传图片
// @Accept  json
// @Produce  json
// @Author hyy 2022-03-03 19:30:37
// @Param   file    body    interface{}     true        "想要上传的文件"
// @Router /v1/tencentCos [post]
func Upload(c *gin.Context) {
	file, err := c.FormFile("file")
	if err != nil {
		log.Println(err)
		c.JSON(http.StatusBadRequest, gin.H{
			"msg":              "上传失败",
			"ERROR-CONTROLLER": err,
		})
		return
	}
	fileType := file.Header["Content-Type"][0]
	if fileType != "image/png" && fileType != "image/jpg" && fileType != "image/jpeg" && fileType != "image/gif" {
		log.Println("上传图片非jpg,png,jpeg,gif,请重新上传！")
		c.JSON(http.StatusBadRequest, gin.H{
			"msg": "上传失败，图片非jpg,png,jpeg,gif,请重新上传！",
		})
		return
	} else if file.Size/1024 > 2000 {
		log.Println("上传图片大于2M，请重新上传")
		c.JSON(http.StatusBadRequest, gin.H{
			"msg": "上传图片大于2M，请重新上传",
		})
		return
	} else {
		f, err := file.Open()
		if err != nil {
			log.Println(err)
			c.JSON(http.StatusBadRequest, gin.H{
				"msg":              "上传失败，打开文件失败！",
				"ERROR-CONTROLLER": err,
			})
		}
		defer f.Close()
		result := util.Upload(file.Filename, f)
		if result == "" {
			c.JSON(http.StatusBadRequest, gin.H{
				"msg": "上传失败",
			})
			return
		}
		c.JSON(http.StatusOK, gin.H{
			"msg":    "上传成功！",
			"result": result,
		})
	}
}

// Delete
// @Summary Delete
// @Description 腾讯云删除图片
// @Accept  json
// @Produce  json
// @Author hyy 2022-03-03 19:30:37
// @Param   fileName    path    string     true        "想要删除的文件名"
// @Router /v1/tencentCos/{fileName} [DELETE]
func Delete(c *gin.Context) {
	fileName := c.Param("fileName")
	if util.Delete(fileName) {
		c.JSON(http.StatusOK, gin.H{
			"msg":    "删除成功",
			"result": true,
		})
		return
	} else {
		c.JSON(http.StatusBadRequest, gin.H{
			"msg":    "删除失败",
			"result": false,
		})
		return
	}
}

4. 测试代码

DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>腾讯云图片测试title>
head>
<body>
<form action="http://localhost:8000/v1/tencentCos" method="post" enctype="multipart/form-data">
    上传文件:<input type="file" name="file">
    <input type="submit" value="提交">
form>
body>
html>