2021年10月22日 15:09:01go评论76阅读模式

英文:

How to run different codes according to login status in chromedp?

问题

演示代码：

package main

import (
	"context"
	"log"
	"time"

	"github.com/chromedp/cdproto/cdp"
	"github.com/chromedp/cdproto/target"
	"github.com/chromedp/chromedp"
	"github.com/chromedp/chromedp/kb"
)

func getTargetId(ctx context.Context, title string) (targetId target.ID) {
	targets, err := chromedp.Targets(ctx)
	if err != nil {
		log.Fatalln(err)
	}

	for _, t := range targets {
		// log.Printf("title %s , ID %s \n", t.Title, t.TargetID)
		if title == t.Title {
			return t.TargetID
		}
	}
	return ""
}

func main() {
	options := append(chromedp.DefaultExecAllocatorOptions[:],
		chromedp.Flag("headless", false),
		chromedp.DisableGPU,
		chromedp.Flag("disable-extensions", false),
		chromedp.Flag("enable-automation", false),
		chromedp.UserAgent("Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36"),
	)

	allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), options...)
	defer cancel()

	task1Ctx, cancel := chromedp.NewContext(allocCtx)
	defer cancel()

	if err := chromedp.Run(task1Ctx,
		chromedp.Navigate("https://stackoverflow.com/questions/69672682/how-to-run-different-codes-according-to-login-status-in-chromedp"),
	); err != nil {
		log.Printf("navigate stackoverflow.com err : %v\n", err)
	}

	task2Ctx, cancel := chromedp.NewContext(task1Ctx)
	defer cancel()

	var id []cdp.NodeID
	//add timeout 10 seconds
	tCtx, cancel := context.WithTimeout(task2Ctx, 10*time.Second)
	defer cancel()
	if err := chromedp.Run(tCtx,
		chromedp.Navigate("https://github.com/chromedp/chromedp"),
		//user info button upper right corner
		chromedp.NodeIDs(`body > div.position-relative.js-header-wrapper > header > div.Header-item.position-relative.mr-0.d-none.d-md-flex`, &id, chromedp.ByQuery),
	); err != nil {
		log.Printf("whether need login err : %v\n", err)
	}

	//get targetid by title
	id_task2Ctx := getTargetId(task1Ctx, "GitHub - chromedp/chromedp: A faster, simpler way to drive browsers supporting the Chrome DevTools Protocol.")

	//return to the tab
	task2Ctx, cancel = chromedp.NewContext(task1Ctx, chromedp.WithTargetID(id_task2Ctx))
	defer cancel()
	if err := chromedp.Run(task2Ctx,
		chromedp.Navigate("https://github.com/chromedp/chromedp"),
	); err != nil {
		log.Printf("navigate chromedp err : %v\n", err)
	}

	//determine whether login is required
	if len(id) == 0 {
		// code for login
		if err := chromedp.Run(task2Ctx,
			//click sign in
			chromedp.Click(`body > div.position-relative.js-header-wrapper > header > div > div.HeaderMenu.HeaderMenu--logged-out.position-fixed.top-0.right-0.bottom-0.height-fit.position-lg-relative.d-lg-flex.flex-justify-between.flex-items-center.flex-auto > div.d-lg-flex.flex-items-center.px-3.px-lg-0.text-center.text-lg-left > div.position-relative.mr-3.mb-4.mb-lg-0.d-inline-block > a`, chromedp.ByQuery),
			chromedp.SendKeys(`#login_field`, `XXX`),
			chromedp.SendKeys(`#password`, `XXX`+kb.Enter),
		); err != nil {
			log.Printf("login err : %v\n", err)
		}
	}

	if err := chromedp.Run(task2Ctx,
		//click master
		chromedp.Click(`#branch-select-menu > summary`, chromedp.ByQuery),
		//click tag
		chromedp.Click(`#branch-select-menu > div > div > input-demux > tab-container > div.SelectMenu-tabs > button:nth-child(2)`, chromedp.ByQuery),
		//wait tags list visible
		chromedp.WaitVisible(`#tags-menu > ref-selector > div > div > div > a:nth-child(1)`, chromedp.ByQuery),
		//click v0.6.6
		chromedp.Click(`//*[@id="tags-menu"]/ref-selector/div/div/div/a/span[text()="v0.6.6"]`, chromedp.BySearch),
		chromedp.Sleep(20*time.Second),
	); err != nil {
		log.Printf("logined err : %v\n", err)
	}

}

我期望看到什么？

1、如果没有登录，它将点击“登录”并进行登录，然后点击“master”>“Tags”>“v0.6.6”。

2、如果已登录，它将点击“master”>“Tags”>“v0.6.6”。

实际看到了什么？

1、如果没有登录，运行代码时，有时会出现错误：
2021/10/22 12:45:42 login err : Could not find node with given id (-32000)

2、如果已登录，运行代码时，会打开两个“https://github.com/chromedp/chromedp”的标签页。

英文:

demo codes:

package main

import (
	&quot;context&quot;
	&quot;log&quot;
	&quot;time&quot;

	&quot;github.com/chromedp/cdproto/cdp&quot;
	&quot;github.com/chromedp/cdproto/target&quot;
	&quot;github.com/chromedp/chromedp&quot;
	&quot;github.com/chromedp/chromedp/kb&quot;
)

func getTargetId(ctx context.Context, title string) (targetId target.ID) {
	targets, err := chromedp.Targets(ctx)
	if err != nil {
		log.Fatalln(err)
	}

	for _, t := range targets {
		// log.Printf(&quot;title %s , ID %s \n&quot;, t.Title, t.TargetID)
		if title == t.Title {
			return t.TargetID
		}
	}
	return &quot;&quot;
}

func main() {
	options := append(chromedp.DefaultExecAllocatorOptions[:],
		chromedp.Flag(`headless`, false),
		chromedp.DisableGPU,
		chromedp.Flag(`disable-extensions`, false),
		chromedp.Flag(`enable-automation`, false),
		chromedp.UserAgent(`Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36`),
	)

	allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), options...)
	defer cancel()

	task1Ctx, cancel := chromedp.NewContext(allocCtx)
	defer cancel()

	if err := chromedp.Run(task1Ctx,
		chromedp.Navigate(&quot;https://stackoverflow.com/questions/69672682/how-to-run-different-codes-according-to-login-status-in-chromedp&quot;),
	); err != nil {
		log.Printf(&quot;navigate stackoverflow.com err : %v\n&quot;, err)
	}

	task2Ctx, cancel := chromedp.NewContext(task1Ctx)
	defer cancel()

	var id []cdp.NodeID
	//add timeout 10 seconds
	tCtx, cancel := context.WithTimeout(task2Ctx, 10*time.Second)
	defer cancel()
	if err := chromedp.Run(tCtx,
		chromedp.Navigate(&quot;https://github.com/chromedp/chromedp&quot;),
		//user info button upper right corner
		chromedp.NodeIDs(`body &gt; div.position-relative.js-header-wrapper &gt; header &gt; div.Header-item.position-relative.mr-0.d-none.d-md-flex`, &amp;id, chromedp.ByQuery),
	); err != nil {
		log.Printf(&quot;whether need login err : %v\n&quot;, err)
	}

	//get targetid by title
	id_task2Ctx := getTargetId(task1Ctx, &quot;GitHub - chromedp/chromedp: A faster, simpler way to drive browsers supporting the Chrome DevTools Protocol.&quot;)

	//return to the tab 
	task2Ctx, cancel = chromedp.NewContext(task1Ctx, chromedp.WithTargetID(id_task2Ctx))
	defer cancel()
	if err := chromedp.Run(task2Ctx,
		chromedp.Navigate(&quot;https://github.com/chromedp/chromedp&quot;),
	); err != nil {
		log.Printf(&quot;navigate chromedp err : %v\n&quot;, err)
	}

	//determine whether login is required
	if len(id) == 0 {
		// code for login
		if err := chromedp.Run(task2Ctx,
			//click sign in
			chromedp.Click(`body &gt; div.position-relative.js-header-wrapper &gt; header &gt; div &gt; div.HeaderMenu.HeaderMenu--logged-out.position-fixed.top-0.right-0.bottom-0.height-fit.position-lg-relative.d-lg-flex.flex-justify-between.flex-items-center.flex-auto &gt; div.d-lg-flex.flex-items-center.px-3.px-lg-0.text-center.text-lg-left &gt; div.position-relative.mr-3.mb-4.mb-lg-0.d-inline-block &gt; a`, chromedp.ByQuery),
			chromedp.SendKeys(`#login_field`, `XXX`),
			chromedp.SendKeys(`#password`, `XXX`+kb.Enter),
		); err != nil {
			log.Printf(&quot;login err : %v\n&quot;, err)
		}
	}

	if err := chromedp.Run(task2Ctx,
		//click master
		chromedp.Click(`#branch-select-menu &gt; summary`, chromedp.ByQuery),
		//click tag
		chromedp.Click(`#branch-select-menu &gt; div &gt; div &gt; input-demux &gt; tab-container &gt; div.SelectMenu-tabs &gt; button:nth-child(2)`, chromedp.ByQuery),
		//wait tags list visible
		chromedp.WaitVisible(`#tags-menu &gt; ref-selector &gt; div &gt; div &gt; div &gt; a:nth-child(1)`, chromedp.ByQuery),
		//click v0.6.6
		chromedp.Click(`//*[@id=&quot;tags-menu&quot;]/ref-selector/div/div/div/a/span[text()=&quot;v0.6.6&quot;]`, chromedp.BySearch),
		chromedp.Sleep(20*time.Second),
	); err != nil {
		log.Printf(&quot;logined err : %v\n&quot;, err)
	}

}

What did I expect to see?

1、If it is not logined, it will click sign in and login, then click master > Tags > v0.6.6

2、If it is logined, it will click master > Tags > v0.6.6

What did I see instead?

1、If it is not logined, run the code, sometimes it get errors:
2021/10/22 12:45:42 login err : Could not find node with given id (-32000)

2、If it is logined, run the code, it opens two tabs of "https://github.com/chromedp/chromedp"

答案1

得分: 1

package main

import (
    "context"
    "log"
    "time"

    "github.com/chromedp/cdproto/cdp"
    "github.com/chromedp/cdproto/target"
    "github.com/chromedp/chromedp"
    "github.com/chromedp/chromedp/kb"
)

func getTargetId(ctx context.Context, title string) (targetId target.ID) {
    targets, err := chromedp.Targets(ctx)
    if err != nil {
        log.Fatalln(err)
    }

    for _, t := range targets {
        // log.Printf("title %s , ID %s \n", t.Title, t.TargetID)
        if title == t.Title {
            return t.TargetID
        }
    }
    return ""
}

func main() {
    options := append(chromedp.DefaultExecAllocatorOptions[:],
        chromedp.Flag(`headless`, false),
        chromedp.DisableGPU,
        chromedp.Flag(`disable-extensions`, false),
        chromedp.Flag(`enable-automation`, false),
        chromedp.UserAgent(`Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36`),
    )

    allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), options...)
    defer cancel()

    // task1Ctx, cancel := chromedp.NewContext(allocCtx, chromedp.WithDebugf(log.Printf))
    task1Ctx, cancel := chromedp.NewContext(allocCtx)
    defer cancel()

    if err := chromedp.Run(task1Ctx,
        chromedp.Navigate("https://stackoverflow.com/questions/69672682/how-to-run-different-codes-according-to-login-status-in-chromedp"),
    ); err != nil {
        log.Printf("navigate stackoverflow.com err : %v\n", err)
    }

    task2Ctx, cancel := chromedp.NewContext(task1Ctx)
    defer cancel()

    var id []cdp.NodeID
    //add timeout 15 seconds
    task2Ctx, cancel = context.WithTimeout(task2Ctx, 15*time.Second)
    defer cancel()
    if err := chromedp.Run(task2Ctx,
        chromedp.Navigate("https://github.com/chromedp/chromedp"),
        //user info button upper right corner
        chromedp.NodeIDs(`body > div.position-relative.js-header-wrapper > header > div.Header-item.position-relative.mr-0.d-none.d-md-flex`, &id, chromedp.ByQuery),
    ); err != nil {
        log.Printf("whether need login err : %v\n", err)
    }

    //get targetid by title, task2Ctx stopped, get targetid from task1Ctx only!
    id_task2Ctx := getTargetId(task1Ctx, "GitHub - chromedp/chromedp: A faster, simpler way to drive browsers supporting the Chrome DevTools Protocol.")

    //determine whether login is required
    if len(id) == 0 {
        //return to the tab
        task2Ctx, cancel = chromedp.NewContext(task1Ctx, chromedp.WithTargetID(id_task2Ctx))
        defer cancel()
        // code for login
        if err := chromedp.Run(task2Ctx,
            //click sign in
            chromedp.Click(`body > div.position-relative.js-header-wrapper > header > div > div.HeaderMenu.HeaderMenu--logged-out.position-fixed.top-0.right-0.bottom-0.height-fit.position-lg-relative.d-lg-flex.flex-justify-between.flex-items-center.flex-auto > div.d-lg-flex.flex-items-center.px-3.px-lg-0.text-center.text-lg-left > div.position-relative.mr-3.mb-4.mb-lg-0.d-inline-block > a`, chromedp.ByQuery),
            chromedp.SendKeys(`#login_field`, `XXX`),
            chromedp.SendKeys(`#password`, `XXX`+kb.Enter),
        ); err != nil {
            log.Printf("login err : %v\n", err)
        }
    }

    if err := chromedp.Run(task2Ctx,
        //click master
        chromedp.Click(`#branch-select-menu > summary`, chromedp.ByQuery),
        //wait Tags visible
        chromedp.WaitVisible(`#branch-select-menu > div > div > input-demux > tab-container > div.SelectMenu-tabs > button:nth-child(2)`, chromedp.ByQuery),
        //click Tags
        chromedp.Click(`#branch-select-menu > div > div > input-demux > tab-container > div.SelectMenu-tabs > button:nth-child(2)`, chromedp.ByQuery),
        //wait tags-list child visible
        chromedp.WaitVisible(`#tags-menu > ref-selector > div > div > div > a:nth-child(1)`, chromedp.ByQuery),
        //click v0.6.6
        chromedp.Click(`//*[@id="tags-menu"]/ref-selector/div/div/div/a/span[text()="v0.6.6"]`, chromedp.BySearch),
        chromedp.Sleep(15*time.Second),
    ); err != nil {
        log.Printf("logined err : %v\n", err)
    }

}

英文:

package main

import (
    &quot;context&quot;
    &quot;log&quot;
    &quot;time&quot;

    &quot;github.com/chromedp/cdproto/cdp&quot;
    &quot;github.com/chromedp/cdproto/target&quot;
    &quot;github.com/chromedp/chromedp&quot;
    &quot;github.com/chromedp/chromedp/kb&quot;
)

func getTargetId(ctx context.Context, title string) (targetId target.ID) {
    targets, err := chromedp.Targets(ctx)
    if err != nil {
        log.Fatalln(err)
    }

    for _, t := range targets {
        // log.Printf(&quot;title %s , ID %s \n&quot;, t.Title, t.TargetID)
        if title == t.Title {
            return t.TargetID
        }
    }
    return &quot;&quot;
}

func main() {
    options := append(chromedp.DefaultExecAllocatorOptions[:],
        chromedp.Flag(`headless`, false),
        chromedp.DisableGPU,
        chromedp.Flag(`disable-extensions`, false),
        chromedp.Flag(`enable-automation`, false),
        chromedp.UserAgent(`Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36`),
    )

    allocCtx, cancel := chromedp.NewExecAllocator(context.Background(), options...)
    defer cancel()

    // task1Ctx, cancel := chromedp.NewContext(allocCtx, chromedp.WithDebugf(log.Printf))
    task1Ctx, cancel := chromedp.NewContext(allocCtx)
    defer cancel()

    if err := chromedp.Run(task1Ctx,
        chromedp.Navigate(&quot;https://stackoverflow.com/questions/69672682/how-to-run-different-codes-according-to-login-status-in-chromedp&quot;),
    ); err != nil {
        log.Printf(&quot;navigate stackoverflow.com err : %v\n&quot;, err)
    }

    task2Ctx, cancel := chromedp.NewContext(task1Ctx)
    defer cancel()

    var id []cdp.NodeID
    //add timeout 15 seconds
    task2Ctx, cancel = context.WithTimeout(task2Ctx, 15*time.Second)
    defer cancel()
    if err := chromedp.Run(task2Ctx,
        chromedp.Navigate(&quot;https://github.com/chromedp/chromedp&quot;),
        //user info button upper right corner
        chromedp.NodeIDs(`body &gt; div.position-relative.js-header-wrapper &gt; header &gt; div.Header-item.position-relative.mr-0.d-none.d-md-flex`, &amp;id, chromedp.ByQuery),
    ); err != nil {
        log.Printf(&quot;whether need login err : %v\n&quot;, err)
    }

    //get targetid by title, task2Ctx stopped, get targetid from task1Ctx only!
    id_task2Ctx := getTargetId(task1Ctx, &quot;GitHub - chromedp/chromedp: A faster, simpler way to drive browsers supporting the Chrome DevTools Protocol.&quot;)

    //determine whether login is required
    if len(id) == 0 {
        //return to the tab
        task2Ctx, cancel = chromedp.NewContext(task1Ctx, chromedp.WithTargetID(id_task2Ctx))
        defer cancel()
        // code for login
        if err := chromedp.Run(task2Ctx,
            //click sign in
            chromedp.Click(`body &gt; div.position-relative.js-header-wrapper &gt; header &gt; div &gt; div.HeaderMenu.HeaderMenu--logged-out.position-fixed.top-0.right-0.bottom-0.height-fit.position-lg-relative.d-lg-flex.flex-justify-between.flex-items-center.flex-auto &gt; div.d-lg-flex.flex-items-center.px-3.px-lg-0.text-center.text-lg-left &gt; div.position-relative.mr-3.mb-4.mb-lg-0.d-inline-block &gt; a`, chromedp.ByQuery),
            chromedp.SendKeys(`#login_field`, `XXX`),
            chromedp.SendKeys(`#password`, `XXX`+kb.Enter),
        ); err != nil {
            log.Printf(&quot;login err : %v\n&quot;, err)
        }
    }

    if err := chromedp.Run(task2Ctx,
        //click master
        chromedp.Click(`#branch-select-menu &gt; summary`, chromedp.ByQuery),
        //wait Tags visible
        chromedp.WaitVisible(`#branch-select-menu &gt; div &gt; div &gt; input-demux &gt; tab-container &gt; div.SelectMenu-tabs &gt; button:nth-child(2)`, chromedp.ByQuery),
        //click Tags
        chromedp.Click(`#branch-select-menu &gt; div &gt; div &gt; input-demux &gt; tab-container &gt; div.SelectMenu-tabs &gt; button:nth-child(2)`, chromedp.ByQuery),
        //wait tags-list child visible
        chromedp.WaitVisible(`#tags-menu &gt; ref-selector &gt; div &gt; div &gt; div &gt; a:nth-child(1)`, chromedp.ByQuery),
        //click v0.6.6
        chromedp.Click(`//*[@id=&quot;tags-menu&quot;]/ref-selector/div/div/div/a/span[text()=&quot;v0.6.6&quot;]`, chromedp.BySearch),
        chromedp.Sleep(15*time.Second),
    ); err != nil {
        log.Printf(&quot;logined err : %v\n&quot;, err)
    }

}

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How to run different codes according to login status in chromedp?

问题

演示代码：

我期望看到什么？

实际看到了什么？

demo codes:

What did I expect to see?

What did I see instead?

答案1

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