为知笔记回收站批量还原

背景

不小心删了为知里的笔记，想要还原，然而傻眼了，一次只能还原20个，然而我删了4000多个，手工点这得何年何月啊。
于是查看了为知笔记的请求，写个代码批量发请求，还原笔记。

思路

浏览器打开调试模式，发现了为知笔记获取回收站列表和还原文件的uri为：

• 回收站列表 /wizks/k/deleted?client_type=web&api_version=10&token=%s&kb_guid=%s&obj_type=document&_=%d
• 恢复文件 /ks/deleted/recycle/%s?type=document&clientType=web&clientVersion=3.0.0&apiVersion=10&lang=zh-cn

另外发现cookie里还存有token和多个字段，测试了一下，只需要cookie里带着token就可以了

代码

没有什么难点，就直接上代码了，其中guid在地址栏里直接获取到，token得从cookie里取

package main

import (
	"net/http"
	"time"
	"fmt"
	"gopkg.in/resty.v1"
	"github.com/tidwall/gjson"
	"github.com/corpix/uarand"
)

const BaseUrl = "https://note.wiz.cn"

//token  operator_guid  时间戳毫秒
const RecyleUri = "/wizks/k/deleted?client_type=web&api_version=10&token=%s&kb_guid=%s&obj_type=document&_=%d"

//operator_guid
const RestoreUri = "/ks/deleted/recycle/%s?type=document&clientType=web&clientVersion=3.0.0&apiVersion=10&lang=zh-cn"

//请更换为将登录后的参数
var token = ""
var operatorGuid = ""

var retry = 0

func main() {
	cookie := http.Cookie{}
	cookie.Name = "token"
	cookie.Value = token
	cookie.Domain = ".wiz.cn"

	start := time.Now().Unix()

	fmt.Println("task begin")

	requester := resty.SetHostURL(BaseUrl).SetCookie(&cookie).R()

	ch := make(chan int)

	go restore(requester, ch)
ForEnd:
	for {
		select {
		case v := <-ch:
			retry++
			if retry >= 30 || v == 2 {
				break ForEnd
			}
			if v == 1 {
				time.Sleep(time.Second * 3)
				fmt.Println("retry task again")
				requester.SetHeader("User-Agent", uarand.GetRandom())
				go restore(requester, ch)
			}
		}

	}

	fmt.Printf("task completed,use %d seconds.\n", time.Now().Unix()-start)
}

func restore(requester *resty.Request, ch chan int) {

	resp, err := requester.Get(fmt.Sprintf(RecyleUri, token, operatorGuid, time.Now().Nanosecond()/1000000))
	if err != nil || resp.StatusCode() != 200 {
		ch <- 1
		return
	}
	if resp.String() == "[]" {
		ch <- 2
	}

	//数据结构为
	//[{"operator_guid":"","dt_deleted":1507821257000,"deleted_guid":"","deleted_content":""},{...}]
	result := gjson.ParseBytes(resp.Body())
	if result.IsArray() {
		guids := make([]string, 0)
		result.ForEach(func(key, value gjson.Result) bool {
			dGuid := value.Get("deleted_guid").String()
			if dGuid == "" {
				ch <- 1
				return false
			}
			guids = append(guids, dGuid)
			if len(guids) >= 100 {
				res := requestRestore(requester, guids, ch)
				guids = nil
				return res
			}
			return true
		})

		if guids != nil {
			requestRestore(requester, guids, ch)
			guids = nil
		}

	} else {
		fmt.Println(resp.String())
		ch <- 1
	}

}

func requestRestore(requester *resty.Request, guids []string, ch chan int) bool {
	resp, err := requester.SetBody(guids).Post(fmt.Sprintf(RestoreUri, operatorGuid)) //[]string{dGuid}
	if err != nil {
		fmt.Println(err)
		ch <- 1
		return false
	}
	if resp.StatusCode() != 200 || gjson.Get(resp.String(), "returnMessage").String() != "OK" {
		ch <- 1
		return false
	}
	fmt.Printf("a bulk of %d doc restore", len(guids))
	return true
}

吐槽一下，为知笔记恢复，在恢复一页时，居然发了20个请求，然而后端实际上是可以批量恢复的，只需要把这20条的guid一次发过去就可以了。上面的代码就一次发了100个guid。