spider_creater/backend/script/script.go

package script

import (
	"context"
	"errors"
	"fmt"
	"github.com/yuin/gopher-lua/parse"
	qu "jygit.jydev.jianyu360.cn/data_processing/common_utils"
	"net/url"
	"os"
	"path/filepath"
	"spider_creator/backend"
	"strconv"
	"strings"
	"time"

	"github.com/chromedp/cdproto/browser"
	"github.com/chromedp/cdproto/network"
	"github.com/chromedp/cdproto/page"
	"github.com/chromedp/chromedp"
	"github.com/yuin/gopher-lua"
	be "spider_creator/backend"
)

const (
	selector_type_id        = 0
	selector_type_query     = 1
	selector_type_search    = 2
	selector_type_jspath    = 3
	selector_type_query_all = 4

	execute_return_type_string = 0
	execute_return_type_list   = 1
	execute_return_type_table  = 2

	qlm_list_lua   = "/script/qlm_list.lua"
	qlm_detail_lua = "/script/qlm_detail.lua"
)

var (
	DataCache = make(chan map[string]interface{}, 2000)
	Datas     []map[string]interface{}
)

type GLVm struct {
	AttachesDir   string
	Dnf           backend.EventNotifyFace
	Headless      bool
	ShowImage     bool
	ProxyServer   bool
	ProxyAddr     string
	B             *GLBrowser
	ScriptRunning bool //控制一次只能执行一个脚本
	DataSaveOver  chan bool
}

type GLBrowser struct {
	Ctx      context.Context
	CancelFn context.CancelFunc
}

func NewGLVM(attachesDir string, dnf be.EventNotifyFace) *GLVm {
	return &GLVm{
		AttachesDir:  attachesDir,
		Dnf:          dnf,
		DataSaveOver: make(chan bool, 1),
	}
}

// LoadScript 加载脚本
func (glvm *GLVm) LoadScript(page string) string {
	var path string
	if page == "list" {
		path = glvm.AttachesDir + qlm_list_lua
	} else if page == "detail" {
		path = glvm.AttachesDir + qlm_detail_lua
	}

	bs, err := os.ReadFile(path)
	if err != nil {
		qu.Debug(path, "脚本加载失败...")
	}
	return string(bs)
}

// RunScript 执行lua代码
func (glvm *GLVm) RunScript(script, recordId string) error {
	defer Catch()
	var s *lua.LState = lua.NewState()
	defer s.Close()
	//方法绑定
	glvm.ResetBrowser()  //先创建浏览器对象
	glvm.BindLuaState(s) //绑定虚拟机函数
	glvm.B.BindLuaState(s, recordId)
	defer func() {
		if b := glvm.B; b != nil {
			b.CancelFn()
			b.Ctx = nil
			b.CancelFn = nil
		}
	}()

	reader := strings.NewReader(script)
	chunk, err := parse.Parse(reader, "code")
	if err != nil {
		return err
	}
	proto, err := lua.Compile(chunk, script)
	if err != nil {
		return err
	}
	lfunc := s.NewFunctionFromProto(proto)
	s.Push(lfunc)
	s.Call(0, 0)

	return nil
}

// ResetBrowser 重置浏览器
func (glvm *GLVm) ResetBrowser() {
	if glvm.B != nil && glvm.B.CancelFn != nil {
		glvm.B.CancelFn()
		glvm.B.Ctx = nil
		glvm.B.CancelFn = nil
	}
	_, _, _, _, ctx, incCancelFn := backend.NewBrowser(glvm.Headless, glvm.ShowImage, glvm.ProxyServer, "http://")
	b := &GLBrowser{
		Ctx:      ctx,
		CancelFn: incCancelFn,
	}

	if glvm.B == nil {
		glvm.B = b
	} else {
		glvm.B.Ctx, glvm.B.CancelFn = b.Ctx, b.CancelFn
	}
}

// BindLuaState 绑定虚拟机函数
func (glvm *GLVm) BindLuaState(state *lua.LState) {
	state.SetGlobal("browser_reset", state.NewFunction(func(l *lua.LState) int {
		glvm.ResetBrowser()
		return 0
	}))
	//
	state.SetGlobal("browser_save", state.NewFunction(func(l *lua.LState) int {
		//spiderCode := l.ToString(-5)
		//siteName := l.ToString(-4)
		//siteChannelName := l.ToString(-3)
		//siteChannelUrl := l.ToString(-2)
		/*table := l.ToTable(-1)
		data := TableToMap(table)*/
		//vm.S.Save(spiderCode, siteName, siteChannelName, siteChannelUrl, data)
		return 0
	}))
}

// findTab 根据标题、url找tab
func (b *GLBrowser) findTabContext(tabTitle, tabUrl string, timeoutInt64 int64) (ctx context.Context, err error) {
	if timeoutInt64 == 0 {
		timeoutInt64 = 5000
	}
	timeout := time.Duration(timeoutInt64) * time.Millisecond
	if tabTitle == "" && tabUrl == "" {
		ctx, _ = context.WithTimeout(b.Ctx, timeout)
		return ctx, nil
	} else {
		ts, err := chromedp.Targets(b.Ctx)
		if err != nil {
			return nil, err
		}
		for _, t := range ts {
			if (tabTitle != "" && strings.Contains(t.Title, tabTitle)) || (tabUrl != "" && strings.Contains(t.URL, tabUrl)) {
				// log.Printf("find tab param<title,url>: %s %s found %s %s", tabTitle, tabUrl,
				// 	t.Title, t.URL)
				newCtx, _ := chromedp.NewContext(b.Ctx, chromedp.WithTargetID(t.TargetID))
				ctx, _ = context.WithTimeout(newCtx, timeout)
				return ctx, nil
			}
		}
	}
	return nil, errors.New("can't find tab")
}

// CloseTabs 关闭页面
func (b *GLBrowser) CloseTabs(tabTitle, tabUrl string, timeoutInt64 int64) (err error) {
	if timeoutInt64 == 0 {
		timeoutInt64 = 5
	}
	timeout := time.Duration(timeoutInt64) * time.Millisecond

	ts, err := chromedp.Targets(b.Ctx)
	if err != nil {
		return err
	}
	for _, t := range ts {
		if (tabTitle != "" && strings.Contains(t.Title, tabTitle)) || (tabUrl != "" && strings.Contains(t.URL, tabUrl)) {
			newCtx, _ := chromedp.NewContext(b.Ctx, chromedp.WithTargetID(t.TargetID))
			ctx, _ := context.WithTimeout(newCtx, timeout)
			chromedp.Run(
				ctx,
				page.Close(),
			)
		}
	}
	return nil
}

// Navigate 导航到指定网址
func (b *GLBrowser) Navigate(tabTitle string, tabUrl string, isNewTab bool, targetUrl string, timeout int64) (err error) {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	//新标签页
	if isNewTab {
		ctx, _ = chromedp.NewContext(ctx)
	}
	//
	return chromedp.Run(ctx,
		chromedp.Navigate(targetUrl))
}

// Navigate 导航到指定网址,并保存请求资源，如图片等
func (b *GLBrowser) NavigateAndSaveRes(tabTitle string, tabUrl string, timeout int64, isNewTab bool, targetUrl string, saveFileTypeList, save2dir string) (err error) {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	//新标签页
	if isNewTab {
		ctx, _ = chromedp.NewContext(ctx)
	}
	//
	saveFileType := strings.Split(saveFileTypeList, " ")
	isNeedRes := func(fileType string) bool {
		for _, v := range saveFileType {
			if strings.Contains(fileType, v) {
				return true
			}
		}
		return false
	}
	fnURL2FileName := func(requestURL string) string {
		u, err := url.Parse(requestURL)
		if err != nil {
			return ""
		}
		_, filename := filepath.Split(u.Path)
		return filename
	}
	var cache = map[network.RequestID]string{}
	chromedp.ListenTarget(ctx, func(v interface{}) {
		switch ev := v.(type) {
		case *network.EventRequestWillBeSent: //准备下载
			cache[ev.RequestID] = ev.Request.URL
		case *network.EventResponseReceived: //检查回应头的contenttype
			contentType, _ := ev.Response.Headers["Content-Type"].(string)
			fmt.Println(contentType)
			if !isNeedRes(contentType) {
				delete(cache, ev.RequestID)
			}
		case *network.EventLoadingFinished: //下载完成
			if uri, ok := cache[ev.RequestID]; ok {
				filename := fnURL2FileName(uri)
				fmt.Println("save2file", filename)
				if filename != "" {
					filePath := filepath.Join(save2dir, filename)
					var buf []byte
					if err := chromedp.Run(ctx, chromedp.ActionFunc(func(ctx context.Context) error {
						var err error
						buf, err = network.GetResponseBody(ev.RequestID).Do(ctx)
						return err
					})); err == nil {
						os.WriteFile(filePath, buf, 0777)
					} else {
						fmt.Println(err.Error())
					}
				}
			}
		}
	})

	//
	err = chromedp.Run(ctx,
		chromedp.Navigate(targetUrl))
	//下载存储
	return err
}

// ExecuteJS 执行脚本
func (b *GLBrowser) ExecuteJS(tabTitle, tabUrl, script string, ret interface{}, timeout int64) (err error) {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	return chromedp.Run(ctx,
		chromedp.Evaluate(script, ret))
}

// Click 点击
func (b *GLBrowser) Click(tabTitle, tabUrl, selector string, selectorType int, timeout int64) (err error) {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	var act chromedp.QueryAction
	switch selectorType {
	case selector_type_id:
		act = chromedp.Click(selector, chromedp.ByID)
	case selector_type_query:
		act = chromedp.Click(selector, chromedp.ByQuery)
	case selector_type_search:
		act = chromedp.Click(selector, chromedp.BySearch)
	case selector_type_jspath:
		act = chromedp.Click(selector, chromedp.ByJSPath)
	default:
		act = chromedp.Click(selector, chromedp.ByQueryAll)
	}

	err = chromedp.Run(ctx,
		act)
	return err

}

// KeySend 键盘输入
func (b *GLBrowser) KeySend(tabTitle, tabUrl, selector, sendStr string, selectorType int, timeout int64) (err error) {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	var act chromedp.QueryAction
	switch selectorType {
	case selector_type_id:
		act = chromedp.SendKeys(selector, sendStr, chromedp.ByID)
	case selector_type_query:
		act = chromedp.SendKeys(selector, sendStr, chromedp.ByQuery)
	case selector_type_search:
		act = chromedp.SendKeys(selector, sendStr, chromedp.BySearch)
	case selector_type_jspath:
		act = chromedp.SendKeys(selector, sendStr, chromedp.ByJSPath)
	default:
		act = chromedp.SendKeys(selector, sendStr, chromedp.ByQueryAll)
	}
	return chromedp.Run(ctx,
		act)
}

// WaitVisible 等待元素可见
func (b *GLBrowser) WaitVisible(tabTitle, tabUrl, selector string, selectorType int, timeout int64) error {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	var act chromedp.QueryAction
	switch selectorType {
	case selector_type_id:
		act = chromedp.WaitVisible(selector, chromedp.ByID)
	case selector_type_query:
		act = chromedp.WaitVisible(selector, chromedp.ByQuery)
	case selector_type_search:
		act = chromedp.WaitVisible(selector, chromedp.BySearch)
	case selector_type_jspath:
		act = chromedp.WaitVisible(selector, chromedp.ByJSPath)
	default:
		act = chromedp.WaitVisible(selector, chromedp.ByQueryAll)
	}
	return chromedp.Run(ctx,
		act)
}

// 重置浏览器
func (b *GLBrowser) Reset() {

}

// DownloadFile 只有在非headless模式下有效，与click方法其实是一致的
func (b *GLBrowser) DownloadFile(tabTitle, tabUrl string, timeout int64, selector string, selectorType int, save2dir string) error {
	ctx, err := b.findTabContext(tabTitle, tabUrl, timeout)
	if err != nil {
		return err
	}
	var act chromedp.QueryAction
	switch selectorType {
	case selector_type_id:
		act = chromedp.Click(selector, chromedp.ByID)
	case selector_type_query:
		act = chromedp.Click(selector, chromedp.ByQuery)
	case selector_type_search:
		act = chromedp.Click(selector, chromedp.BySearch)
	case selector_type_jspath:
		act = chromedp.Click(selector, chromedp.ByJSPath)
	default:
		act = chromedp.Click(selector, chromedp.ByQueryAll)
	}

	return chromedp.Run(ctx,
		browser.SetDownloadBehavior(browser.SetDownloadBehaviorBehaviorAllowAndName).WithDownloadPath(save2dir).WithEventsEnabled(true),
		act)
}

// BindLuaState
func (b *GLBrowser) BindLuaState(s *lua.LState, recordId string) {
	//执行暂停
	s.SetGlobal("browser_sleep", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_sleep---")
		timeout := l.ToInt64(-1)
		if timeout == 0 {
			timeout = 5
		}
		time.Sleep(time.Duration(timeout) * time.Millisecond)
		return 0
	}))
	//关闭tabl页
	s.SetGlobal("browser_closetabs", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_closetabs---")
		timeout := l.ToInt64(-3)
		tabTitle := l.ToString(-2)
		tabUrl := l.ToString(-1)
		if timeout == 0 {
			timeout = 5
		}
		b.CloseTabs(tabTitle, tabUrl, timeout)
		return 0
	}))
	//注册打开地址
	s.SetGlobal("browser_navagite", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_navagite---")
		tabTitle := l.ToString(-5)  //指定标签页title
		tabUrl := l.ToString(-4)    //指定标签页url
		isNewTab := l.ToBool(-3)    //是否打开新的标签页
		timeout := l.ToInt64(-2)    //网页打开的超时时间
		targetUrl := l.ToString(-1) //打开网页的链接
		if err := b.Navigate(tabTitle, tabUrl, isNewTab, targetUrl, timeout); err != nil {
			l.Push(lua.LString(err.Error()))
		} else {
			l.Push(lua.LString("ok"))
		}
		return 1
	}))
	//执行浏览器端js
	s.SetGlobal("browser_executejs", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_executejs---")
		tabTitle := l.ToString(-5)
		tabUrl := l.ToString(-4)
		timeout := l.ToInt64(-3)
		returnType := l.ToInt(-2) //返回数据类型
		script := l.ToString(-1)  //执行的js

		switch returnType {
		case execute_return_type_string: //返回string
			var ret string
			if err := b.ExecuteJS(tabTitle, tabUrl, script, &ret, timeout); err == nil {
				l.Push(lua.LString("ok"))
				l.Push(lua.LString(ret))
			} else {
				l.Push(lua.LString("err"))
				l.Push(lua.LString(err.Error()))
			}
		case execute_return_type_list: //返回list
			var ret = make([]interface{}, 0, 0)
			var tmp = make(map[string]interface{})
			if err := b.ExecuteJS(tabTitle, tabUrl, script, &ret, timeout); err == nil {
				for i, v := range ret {
					tmp[strconv.Itoa(i)] = v
				}
				l.Push(lua.LString("ok"))
				l.Push(MapToTable(tmp))
			} else {
				l.Push(lua.LString("err"))
				l.Push(lua.LString(err.Error()))
			}
		case execute_return_type_table: //返回table
			var ret = make(map[string]interface{})
			if err := b.ExecuteJS(tabTitle, tabUrl, script, &ret, timeout); err == nil {
				l.Push(lua.LString("ok"))
				l.Push(MapToTable(ret))
			} else {
				l.Push(lua.LString("err"))
				l.Push(lua.LString(err.Error()))
			}
		}
		return 2
	}))
	//按键
	s.SetGlobal("browser_keysend", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_keysend---")
		tabTitle := l.ToString(-6)
		tabUrl := l.ToString(-5)
		timeout := l.ToInt64(-4)
		words := l.ToString(-3)
		selectorType := l.ToInt(-2)
		selector := l.ToString(-1)
		fmt.Println(selector, words, selectorType, timeout)
		err := b.KeySend(tabTitle, tabUrl, selector, words, selectorType, timeout)
		if err != nil {
			l.Push(lua.LString(err.Error()))
		} else {
			l.Push(lua.LString("ok"))
		}
		return 1
	}))
	//点击
	s.SetGlobal("browser_click", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_click---")
		tabTitle := l.ToString(-5)
		tabUrl := l.ToString(-4)
		timeout := l.ToInt64(-3)
		selectorType := l.ToInt(-2)
		selector := l.ToString(-1)

		err := b.Click(tabTitle, tabUrl, selector, selectorType, timeout)
		if err != nil {
			l.Push(lua.LString(err.Error()))
		} else {
			l.Push(lua.LString("ok"))
		}
		return 1
	}))

	s.SetGlobal("browser_waitvisible", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_waitvisible---")
		tabTitle := l.ToString(-5)
		tabUrl := l.ToString(-4)
		timeout := l.ToInt64(-3)
		selectorType := l.ToInt(-2) //选择器类型
		selector := l.ToString(-1)  //选择器

		err := b.WaitVisible(tabTitle, tabUrl, selector, selectorType, timeout)
		if err != nil {
			l.Push(lua.LString(err.Error()))
		} else {
			l.Push(lua.LString("ok"))
		}
		return 1
	}))

	//点击
	s.SetGlobal("browser_downloadfile", s.NewFunction(func(l *lua.LState) int {
		tabTitle := l.ToString(-6)
		tabUrl := l.ToString(-5)
		timeout := l.ToInt64(-4)
		selectorType := l.ToInt(-3)
		selector := l.ToString(-2)
		save2dir := l.ToString(-1)

		err := b.DownloadFile(tabTitle, tabUrl, timeout, selector, selectorType, save2dir)
		if err != nil {
			l.Push(lua.LString(err.Error()))
		} else {
			l.Push(lua.LString("ok"))
		}
		return 1
	}))

	//注册打开地址
	s.SetGlobal("browser_navagite_download_res", s.NewFunction(func(l *lua.LState) int {
		tabTitle := l.ToString(-7)
		tabUrl := l.ToString(-6)
		timeout := l.ToInt64(-5)
		isNewTab := l.ToBool(-4)
		targetUrl := l.ToString(-3)
		saveFileTypeList := l.ToString(-2)
		savedir := l.ToString(-1)
		if err := b.NavigateAndSaveRes(tabTitle, tabUrl, timeout, isNewTab, targetUrl, saveFileTypeList, savedir); err != nil {
			l.Push(lua.LString(err.Error()))
		} else {
			l.Push(lua.LString("ok"))
		}
		return 1
	}))
	//保存数据
	s.SetGlobal("browser_savedata", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_upsertdata---")
		page := l.ToString(-2)
		data := l.ToTable(-1)
		result := TableToMap(data)
		if page == "list" {
			result["recordid"] = recordId
		}
		DataCache <- result
		return 1
	}))
	//获取数据
	s.SetGlobal("browser_getdata", s.NewFunction(func(l *lua.LState) int {
		fmt.Println("---browser_getdata---")
		num := l.ToInt(-1) //获取多少条数据
		count := len(Datas)
		if count == 0 {
			l.Push(lua.LString("err"))
			l.Push(lua.LString("当前可下载量为0"))
		} else {
			resultTable := &lua.LTable{}
			for i := 0; i < num && i < count; i++ {
				resultTable.Append(MapToTable(Datas[i]))
			}
			l.Push(lua.LString("ok"))
			l.Push(resultTable)
		}
		return 2
	}))
}