Question

我想单击html页面中的链接，该页面包含以下片段：

<p>Die maximale Trefferanzahl von 200 wurde überschritten.
  <a href="/rp_web/search.do?doppelt">Verdoppeln Sie hier  Suchergebnislimit.</a>
</p>

我先设置了一些过滤器，然后加载页面，该页面将加载我需要的页面。在该结果页面上，我想单击html代码段中所示的链接。我要使用的js是这个

await Promise.all([
    page.click('input#landNW'), // set a filter
    page.click('input[type=submit]'), // submit the form
    page.waitForNavigation(), // wait for the page to load
    page.click('p a'), // not working: double the search results
    page.waitForNavigation() // not working: waiting for the page to reload
]).catch(e => console.log(e)); // no error

我非常确定page.click('p a')可以正常工作，因为在chrome浏览器的控制台中，我可以执行document.querySelector("p a").click()，然后按预期方式重新加载页面。

我也尝试过使用href属性来选择网址，例如page.click('a[href="/rp_web/search.do?doppelt"]')，但出现错误： No node found for selector: a[href="/rp_web/search.do?doppelt"]。

我该如何完成我期望发生的事情？

编辑，您可以在此处找到完整的存储库：bitbucket/ytNeskews

Answer 1

有很多关于Blob无效的报告，在您的情况下，由于某些原因，它确实不起作用。幸运的是，我们可以在旧的Item（或#include<Windows.h> extern "C" __declspec(dllexport) bool WINAPI DllMain(HINSTANCE hInstDll, DWORD fdwReason, LPVOID lpvReserved) { switch (fdwReason) { case DLL_PROCESS_ATTACH: { MessageBox(NULL, "Hello World!", "Dll says:", MB_OK); break; } case DLL_PROCESS_DETACH: break; case DLL_THREAD_ATTACH: break; case DLL_THREAD_DETACH: break; } return true; }）的帮助下完成所有工作：在这里，我是在浏览器上下文中手动单击链接：

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Text;

public class BasicInject
{
    [DllImport("kernel32.dll")]
    public static extern IntPtr OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);

    [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
    public static extern IntPtr GetModuleHandle(string lpModuleName);

    [DllImport("kernel32", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)]
    static extern IntPtr GetProcAddress(IntPtr hModule, string procName);

    [DllImport("kernel32.dll", SetLastError = true, ExactSpelling = true)]
    static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress, uint dwSize, uint flAllocationType, uint flProtect);

    [DllImport("kernel32.dll", SetLastError = true)]
    static extern bool WriteProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, byte[] lpBuffer, uint nSize, out UIntPtr lpNumberOfBytesWritten);

    [DllImport("kernel32.dll")]
    static extern IntPtr CreateRemoteThread(IntPtr hProcess, IntPtr lpThreadAttributes, uint dwStackSize, IntPtr lpStartAddress, IntPtr lpParameter, uint dwCreationFlags, IntPtr lpThreadId);

    // privileges
    const int PROCESS_CREATE_THREAD = 0x0002;
    const int PROCESS_QUERY_INFORMATION = 0x0400;
    const int PROCESS_VM_OPERATION = 0x0008;
    const int PROCESS_VM_WRITE = 0x0020;
    const int PROCESS_VM_READ = 0x0010;

    // used for memory allocation
    const uint MEM_COMMIT = 0x00001000;
    const uint MEM_RESERVE = 0x00002000;
    const uint PAGE_READWRITE = 4;

    public static int Main()
    {
        // the target process - I'm using a dummy process for this
        // if you don't have one, open Task Manager and choose wisely
        Process targetProcess = Process.GetProcessesByName("testApp")[0];

        // geting the handle of the process - with required privileges
        IntPtr procHandle = OpenProcess(PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION | PROCESS_VM_OPERATION | PROCESS_VM_WRITE | PROCESS_VM_READ, false, targetProcess.Id);

        // searching for the address of LoadLibraryA and storing it in a pointer
        IntPtr loadLibraryAddr = GetProcAddress(GetModuleHandle("kernel32.dll"), "LoadLibraryA");

        // name of the dll we want to inject
        string dllName = "test.dll";

        // alocating some memory on the target process - enough to store the name of the dll
        // and storing its address in a pointer
        IntPtr allocMemAddress = VirtualAllocEx(procHandle, IntPtr.Zero, (uint)((dllName.Length + 1) * Marshal.SizeOf(typeof(char))), MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE);

        // writing the name of the dll there
        UIntPtr bytesWritten;
        WriteProcessMemory(procHandle, allocMemAddress, Encoding.Default.GetBytes(dllName), (uint)((dllName.Length + 1) * Marshal.SizeOf(typeof(char))), out bytesWritten);

        // creating a thread that will call LoadLibraryA with allocMemAddress as argument
        CreateRemoteThread(procHandle, IntPtr.Zero, 0, loadLibraryAddr, allocMemAddress, 0, IntPtr.Zero);

        return 0;
    }
}

结果：

200次点击
400次点击

也不要一次只等待一页导航。还有一个需要注意的地方-使用Chromium可见（{headless：false}）编写这样的脚本要方便得多。

Answer 2

代码看起来不错，我认为操纵up的人实际上是在尝试点击。但是，它不是点击相关链接。

更改视口的方式

await page.setViewport({width: 1366, height: 768})

，您的代码似乎可以正常工作。已经将这个可能的错误通知了伪装者团队。

木偶选择链接

2 个答案: