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main.go
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main.go
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// Package crawlerx
// @Author bcy2007 2023/7/14 10:44
package crawlerx
import (
_ "github.com/yaklang/yaklang/common/yakgrpc/yakit"
"context"
"github.com/yaklang/yaklang/common/crawlerx/tools"
"github.com/yaklang/yaklang/common/log"
"github.com/yaklang/yaklang/common/utils"
"net/url"
"os"
"os/signal"
"strings"
"syscall"
"time"
)
type CrawlerCore struct {
targetUrl string
manager *BrowserManager
config *Config
uChan *tools.UChan
ch chan ReqInfo
waitGroup *utils.SizedWaitGroup
startWaitGroup *utils.SizedWaitGroup
cancel func()
}
func NewCrawlerCore(targetUrl string, opts ...ConfigOpt) (*CrawlerCore, error) {
config := NewConfig()
pageVisit, resultSent := tools.NewCountFilter(), tools.NewCountFilter()
uChan, err := tools.NewUChan(128)
if err != nil {
return nil, utils.Errorf(`Data channel create error: %s`, err)
}
waitGroup := utils.NewSizedWaitGroup(20)
startWaitGroup := utils.NewSizedWaitGroup(20)
ctx, cancel := context.WithCancel(context.Background())
baseOpts := make([]ConfigOpt, 0)
baseOpts = append(baseOpts,
WithTargetUrl(targetUrl),
WithContext(ctx),
WithPageVisitFilter(pageVisit),
WithResultSentFilter(resultSent),
WithUChan(uChan),
WithPageSizedWaitGroup(waitGroup),
WithStartWaitGroup(startWaitGroup),
)
for _, opt := range baseOpts {
opt(config)
}
for _, opt := range opts {
opt(config)
}
browsers := config.browsers
var proxy *url.URL
if len(browsers) > 0 {
proxy = browsers[0].proxyAddress
} else {
proxy = nil
}
var checkedUrl string
if config.urlCheck {
checkedUrl, err = TargetUrlCheck(targetUrl, proxy)
if err != nil {
cancel()
return nil, utils.Errorf(`target url %s check failed: %s`, targetUrl, err)
}
} else {
checkedUrl = targetUrl
}
WithTargetUrl(checkedUrl)(config)
WithUrlTree(tools.CreateTree(checkedUrl))(config)
core := CrawlerCore{
targetUrl: checkedUrl,
config: config,
uChan: uChan,
ch: config.baseConfig.ch,
waitGroup: waitGroup,
startWaitGroup: startWaitGroup,
cancel: cancel,
}
err = core.init()
if err != nil {
return nil, utils.Errorf(`crawlerx core init error: %v`, err)
}
return &core, nil
}
func (core *CrawlerCore) init() error {
manager := NewBrowserManager(core.config)
manager.CreateBrowserStarters()
core.manager = manager
return nil
}
func (core *CrawlerCore) Start() {
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh)
core.manager.Start()
core.uChan.In <- core.targetUrl
go func() {
for {
s := <-sigCh
if s == syscall.SIGTERM || s == syscall.SIGINT {
os.Exit(0)
}
}
}()
log.Debug(`[crawlerx core]starting wait...`)
core.startWaitGroup.Wait()
log.Debug(`[crawlerx core]started!`)
time.Sleep(500 * time.Millisecond)
core.waitGroup.Wait()
core.cancel()
close(core.uChan.In)
close(core.ch)
log.Debug(`Close uChan & channel.`)
time.Sleep(2 * time.Second)
log.Debug(`core done.`)
}
func (core *CrawlerCore) Test() {
core.manager.Test()
core.uChan.In <- core.targetUrl
core.startWaitGroup.Wait()
time.Sleep(500 * time.Millisecond)
core.waitGroup.Wait()
close(core.uChan.In)
close(core.ch)
time.Sleep(2 * time.Second)
}
func StartCrawler(url string, opts ...ConfigOpt) (chan ReqInfo, error) {
ch := make(chan ReqInfo)
opts = append(opts, WithResultChannel(ch))
crawlerX, err := NewCrawlerCore(url, opts...)
if err != nil {
return nil, utils.Errorf(`Create crawler core error: %s`, err)
}
go crawlerX.Start()
return ch, nil
}
func StartCrawlerTest(url string, opts ...ConfigOpt) (chan ReqInfo, error) {
ch := make(chan ReqInfo)
opts = append(opts, WithResultChannel(ch))
crawlerX, err := NewCrawlerCore(url, opts...)
if err != nil {
return nil, utils.Errorf(`Create crawler core error: %s`, err)
}
go crawlerX.Test()
return ch, nil
}
func TargetUrlCheck(targetUrl string, proxy *url.URL) (string, error) {
var tempTargetUrl string
if !strings.Contains(targetUrl, "://") {
tempTargetUrl = "http://" + targetUrl
} else {
tempTargetUrl = targetUrl
}
r := CreateRequest()
r.url = tempTargetUrl
r.method = "GET"
r.defaultHeaders = defaultChromeHeaders
if proxy != nil {
r.proxy = proxy
}
r.init()
err := r.Request()
if err != nil {
return "", err
}
err = r.Do()
if err != nil {
return "", err
}
finalUrl := r.GetUrl()
tempTargetObj, err := url.Parse(tempTargetUrl)
if err != nil {
return "", err
}
finalUrlObj, err := url.Parse(finalUrl)
if err != nil {
return "", err
}
if tempTargetObj.Scheme == finalUrlObj.Scheme && tempTargetObj.Host == finalUrlObj.Host {
return tempTargetUrl, nil
}
return finalUrl, nil
}