light-apiengine-feature/controllers/SysAttachmentController.go

package controllers

import (
	"bytes"
	"fmt"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/logs"
	"io"
	"mime"
	"strconv"
	"strings"

	sysmodel "git.qianqiusoft.com/qianqiusoft/light-apiengine/models"
	"git.qianqiusoft.com/qianqiusoft/light-apiengine/utils"
	"log"
	"path"
	"time"
)

// _Upload
// @Title _Upload
// @Description 上传文件
// @Success 200 {object} models.Account
// @Failure 403 :id is empty
func SysAttachment_Upload(c *SysAttachmentController) {

	// 单文件
	file, _ := c.Ctx.FormFile("file")
	f, _ := file.Open()
	log.Println(file.Filename)

	download, hash, length, err := utils.PostFile(f)

	if err != nil {
		logs.Error("PostFile err: ", err.Error())
		c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
		return
	}

	attach := &sysmodel.SysAttachment{}
	attach.Id = utils.NewUUID()
	attach.Name = file.Filename
	attach.Size = length
	attach.Url = download
	attach.CreateTime = time.Now()
	attach.Ext = path.Ext(attach.Name)
	attach.Hash = hash

	//插入数据库
	_, err = c.Db.Insert(attach)
	if err != nil {
		logs.Error("Insert Attachment err: ", err.Error())
		c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
		return
	}

	ret := __none_func_sys_attachment__()
	if ret {
		c.Ctx.JSON(200, sysmodel.SysReturn{200, "", attach.Id})
	} else {
		c.Ctx.JSON(200, sysmodel.SysReturn{500, "", nil})
	}
}

// _Download
// @Title _Download
// @Description 下载文件
// @Param	id      false  "文件ID"
// @Success 200 {object} models.Account
// @Failure 403 :id is empty
func SysAttachment_Download(c *SysAttachmentController) {
	gt := c.Ctx.GetString("get_thumb")
	attrId := c.Ctx.Param("attrId")
	fmt.Println("--------", attrId)
	var attach sysmodel.SysAttachment
	_, err := c.Db.Id(attrId).Get(&attach)
	if err != nil {
		logs.Error("获取附件出错了:", err)
		c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
		return
	}

	logs.Debug("开始下载附件:", attach.Name, attach.Size)

	durl := attach.Url
	if gt != "" {
		durl += "?getthumb=" + gt
	}

	resultBody, err := utils.GetFile(durl)
	if err != nil {
		logs.Error("下载附件出错了:", err)
		c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
		return
	}
	defer resultBody.Close()

	bbuf := bytes.NewBuffer([]byte{})

	c.Ctx.Header("Content-Disposition", "attachment;filename=\""+utils.FormatForBrowse(c.Ctx.Request.UserAgent(), attach.Name)+"\"")
	c.Ctx.Header("Content-Type", strings.Replace(mime.TypeByExtension(attach.Ext), "charset=utf-8", "", -1))

	buff := make([]byte, 1024)
	var ssize int64 = 0

	for {
		n, err := io.ReadFull(resultBody, buff)
		if err != nil && err != io.ErrUnexpectedEOF && err != io.EOF {
			logs.Error("下载附件出错了:", err)
			c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
			return
		}
		if n <= 0 {
			break
		}
		bbuf.Write(buff[:n])
		ssize += int64(n)
	}

	c.Ctx.Header("Content-Length", strconv.FormatInt(ssize, 10))
	_, err = c.Ctx.Writer.Write(bbuf.Bytes())

	if err != nil {
		logs.Error("输出流断开:", attach.Name, attach.Size)
		c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
		return
	}

	logs.Debug("下载附件成功:", attach.Name, attach.Size)

	ret := __none_func_sys_attachment__(attrId)

	if ret {
		c.Ctx.JSON(200, sysmodel.SysReturn{200, "", nil})
	} else {
		c.Ctx.JSON(200, sysmodel.SysReturn{500, "", nil})
	}
}

// _Delete
// @Title _Delete
// @Description 删除文件
// @Param	id      false  "文件ID"
// @Success 200 {object} models.Account
// @Failure 403 :id is empty
func SysAttachment_Delete(c *SysAttachmentController) {
	attrId := c.Ctx.Param("attrId")
	var attach sysmodel.SysAttachment
	_, err := c.Db.ID(attrId).Delete(&attach)

	if err != nil {
		c.Ctx.JSON(200, sysmodel.SysReturn{500, err.Error(), nil})
		return
	}

	ret := __none_func_sys_attachment__(attrId)
	if ret {
		c.Ctx.JSON(200, sysmodel.SysReturn{200, "", nil})
	} else {
		c.Ctx.JSON(200, sysmodel.SysReturn{500, "", nil})
	}
}

func __none_func_sys_attachment__(params ...interface{}) bool {
	return true
}