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I am trying to extract a source page of a given URL with a C# application. Right now I am using class HttpWebRequest.
The strange thing is that the result page obtained from this class is completely different compared to the page obtained with a Google Chrome browser(Ctrl + u).
Can somebody please tell me how to get the exact source page. Or is it wrong to expect that both pages are equal?
Many thanks
Using a Web Browser can be trivial though the html will be properly retrieved from the internet. The code will require you to call another void or place the code within the event.
WebBrowser wb = new WebBrowser();
private void button1_Click(object sender, EventArgs e) {
wb.Navigate("http://kissanime.com/Anime/One-Piece");
wb.ScriptSupress = true;
wb.DocumentCompleted += pageLoaded;
}
private void pageLoaded(object sender, WebBrowserDocumentCompletedEventArgs e) {
string src = wb.DocumentText;
}
by using that method you will get the html straight out of a web browser though it can take time to load depends on the size of the page, images and dependencies (External files like JS, CSS and Pictures/Videos).
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How to convert a dynamic link which is a html web page into an Image format. Remember the link is dynamic which contains html content in string format. I have tried a lot of ways like reading the html content using converting to base64 first then visa versa.
var htmlToImageConv = new HtmlToImageConverter();
byte[] jpegBytes = htmlToImageConv.GenerateImage(html, ImageFormat.Jpeg); System.Drawing.Image image; using (System.IO.MemoryStream ms = new System.IO.MemoryStream(strOg))
{
image = System.Drawing.Image.FromStream(ms); string path = Server.MapPath("~/images/");
}
I have tried this code in c# for converting html webpage to image.
You can use a headless browser to render the html and then take a snapshot.
Have a look at PuppeteerSHarp: https://github.com/kblok/puppeteer-sharp
You could use Selenium to render the page and save a screenshot as a png image.
Add the following packages to your project:
Selenium.WebDriver
Selenium.Chrome.WebDriver
Use the following code to save a screenshot:
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
var driver = new ChromeDriver();
driver.Navigate().GoToUrl("http://google.com");
Screenshot ss = ((ITakesScreenshot)driver).GetScreenshot();
ss.SaveAsFile("screenshot.png");
}
}
}
That what you need is a conversation from a html containing string to an image, which is already discussed in the answers of this Question.
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I'd like to download the daily photo from this site but i can't use the JPEG's URL because it changes everyday.
Is there any way to download object from site using the page URL and XPath? I tried to find some method in WebClient but with no luck.
An example of my comment with HTML Agility Pack :
WebClient client = new WebClient();
string resource = client.DownloadString("http://photography.nationalgeographic.com/photography/photo-of-the-day/");
HtmlAgilityPack.HtmlDocument html = new HtmlAgilityPack.HtmlDocument();
html.LoadHtml(resource);
var imgDiv = html.DocumentNode.SelectSingleNode("//*[contains(#class,'primary_photo')]");
var imgSrc = imgDiv.SelectSingleNode("//img/#src");
string relativePath = imgSrc.GetAttributeValue("src", "");
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I am trying to Convert a MVC 4 View to a PDF. I have no idea where to start, after searching google i found ItextSharp and have been playing around with it.
My View is fairly Simple it has a Map and a Table. i would like to just call an action in the controller and have it print my web page.
Any Advice would be greatly Appreciated
You can use Rotativa
public ActionResult TestViewWithModel(string id)
{
var model = new TestViewModel {DocTitle = id, DocContent = "This is a test"};
return new ViewAsPdf(model);
}
public ActionResult PrintIndex()
{
return new ActionAsPdf("Index", new { name = "Giorgio" }) { FileName = "Test.pdf" };
}
It uses wkhtmltopdf under the hood.
wkhtmltopdf and wkhtmltoimage are open source (LGPLv3) command line
tools to render HTML into PDF and various image formats using the QT
Webkit rendering engine. These run entirely "headless" and do not
require a display or display service.
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I'm planning to save an online mp4 link to user's local using embedded server. I can do it from input file control. But now I have to do it for online mp4 video.
What I do for file is to send byte array with parts using file.slice method using ajaxrequest as formdata. Then embedded server gets the bytearray and creates the file.
It is ok for file control, but how can I do it for online mp4 video link?
It's a bit difficult to understand your question, but I think this is what you're asking for.
How to download the file synchronously - The quick and dirty approach:
using System.Net;
var webClient = new WebClient();
webClient.DownloadFile("http://somewebsite.com/theVideo.mp4", #"c:\localPath\theVideo.mp4");
How to download the file asynchronously - The better approach:
private void DownloadFile(string url, string localOutputPath)
{
var webClient = new WebClient();
webClient.DownloadFileCompleted += Completed;
webClient.DownloadProgressChanged += ProgressChanged;
webClient.DownloadFileAsync(new Uri(url), localOutputPath);
}
private void ProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
Console.WriteLine(e.ProgressPercentage + " %");
}
private void Completed(object sender, AsyncCompletedEventArgs e)
{
Console.WriteLine("File download completed!");
}
If you're downloading onto the client's machine then this might help:
http://pixelscommander.com/en/javascript/javascript-file-download-ignore-content-type/
Alternatively the user could just send the video url (only) to the server, and let the server download the file.
I have implemented mp4handler for nancyfx and it worked.
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I have the following situation:
A document view where user can upload multiple files. A one(Document) to many(files) relationship. All these files are "inside" the document by its IDDocument property.
The user will make loads of .xml files upload, each file upload fires that Action in my controller:
[HttpPost]
public ActionResult ProcessSubmitUpload(HttpPostedFileBase attachments, Guid? idDocument)
{
//Validations
var xmlDocument = XDocument.Load(attachments.InputStream);
if (xmlDocument.Root.Name.LocalName == "cteProc")
{
if (DocumentCommonHelper.SendXmlViaWebService(xmlDocument))
{
_documentRepository.UpdateDocumentStatus(StatusOption.DocumentApproved);
}
else
{
_documentRepository.UpdateDocumentStatus(StatusOption.DocumentPending);
}
}
}
The logic is: If all files go correctly in the DocumentCommonHelper.SendXmlViaWebService(xmlDocument) , the document status must be Approved. But if one single file fails, the document status must be Pending.
The problem is that approach in this code is wrong. Because its changing the status of the document each time that the Action is executed, forgeting the others HttpPostedFileBase that are passed before.
What is the best way to do that?
Try to store the HttpPostedFileBase in the Session and retrieve them back when you need it
Session["HttpPostedFileBase"] = attachments;