c# - 使用 PhantomJS 下载文件

Question

我正在尝试使用 PhantomJS 下载文件，但是当我点击下载时，没有下载任何文件，我读到 Phantomjs 不支持下载，但我需要那个，你能帮我吗？

这是我尝试下载时的部分代码:

try
{
  checkbox = wait.Until(ExpectedConditions.PresenceOfAllElementsLocatedBy(By.XPath("//form[@id='formDownload']//table[@class='fileTables']//tbody//tr//td//input[@class='checkbox']")));      
  checkbox[countLine - 1].Click();      
  wait.Until(ExpectedConditions.ElementExists(By.Id("all"))).Click();
}
catch (Exception ex)
{
   throw new Exception(ex.Message);
}

Answer 1

好的，你需要做的是:

1. 当您单击 html 中的文件时，您需要找到该文件的链接。

2. 您需要获取链接并发出 httpRequest 来获取文件。

这是请求的完整功能(我为您提供了方便，只需找到链接即可)

public static bool DownloadFile(string url, IWebDriver driver)
        {
            try
            {
                // Construct HTTP request to get the file
                HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(url);
                httpRequest.CookieContainer = new System.Net.CookieContainer();

                for (int i = 0; i < driver.Manage().Cookies.AllCookies.Count - 1; i++)
                {
                    System.Net.Cookie ck = new System.Net.Cookie(driver.Manage().Cookies.AllCookies[i].Name, driver.Manage().Cookies.AllCookies[i].Value, driver.Manage().Cookies.AllCookies[i].Path, driver.Manage().Cookies.AllCookies[i].Domain);
                    httpRequest.CookieContainer.Add(ck);
                }

                httpRequest.Accept = "text/html, application/xhtml+xml, */*";
                httpRequest.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko";

                //HttpStatusCode responseStatus;

                // Get back the HTTP response for web server
                HttpWebResponse httpResponse = (HttpWebResponse)httpRequest.GetResponse();
                Stream httpResponseStream = httpResponse.GetResponseStream();

                // Define buffer and buffer size
                int bufferSize = 1024;
                byte[] buffer = new byte[bufferSize];
                int bytesRead = 0;

                // Read from response and write to file
                FileStream fileStream = File.Create(FilePath + "\\" + FileName + ".xls");
                while ((bytesRead = httpResponseStream.Read(buffer, 0, bufferSize)) != 0)
                {
                    fileStream.Write(buffer, 0, bytesRead);
                }

                return true;
            }
            catch (Exception ex)
            {
               return false;
            }
        }