我可以显示PDF，但不允许链接到它的网站？ [英] Can I display a PDF, but not allow linking to it in a website?

问题描述

我有一个网站，有一堆是pre-创建并坐在网络服务器。

I have a website that has a bunch of PDFs that are pre-created and sitting on the webserver.

我不希望允许用户只需键入网址并获得PDF文件（即 HTTP： //MySite/MyPDFFolder/MyPDF.pdf ）

I don't want to allow a user to just type in a URL and get the PDF file (ie http://MySite/MyPDFFolder/MyPDF.pdf)

我想只允许当我加载它们，它们显示它们进行查看。

I want to only allow them to be viewed when I load them and display them.

我以前做过类似的事情。我用PDFSharp在内存中创建PDF文件，然后将其加载到页面这样的：

I have done something similar before. I used PDFSharp to create a PDF in memory and then load it to a page like this:

protected void Page_Load(object sender, EventArgs e)
{
    try 
    {
        MemoryStream streamDoc = BarcodeReport.GetPDFReport(ID, false);
        // Set the ContentType to pdf, add a header for the length
        // and write the contents of the memorystream to the response
        Response.ContentType = "application/pdf";
        Response.AddHeader("content-length", Convert.ToString(streamDoc.Length));
        Response.BinaryWrite(streamDoc.ToArray());
        //End the response
        Response.End();
        streamDoc.Close();
    }
    catch (NullReferenceException)
    {
        Communication.Logout();
    }


}

我试图用这个code从文件中读取，但无法弄清楚如何让一个MemoryStream在一个文件中读取。

I tried to use this code to read from a file, but could not figure out how to get a MemoryStream to read in a file.

我还需要一种方式说，/ MyPDFFolder路径是不可浏览。

I also need a way to say that the "/MyPDFFolder" path is non-browsable.

感谢您的任何建议。

推荐答案

要加载从磁盘PDF文件到缓冲区：

To load a PDF file from the disk into a buffer:

byte [] buffer;
using(FileStream fileStream = new FileStream(Filename, FileMode.Open))
{
    using (BinaryReader reader = new BinaryReader(fileStream))
    {
         buffer = reader.ReadBytes((int)reader.BaseStream.Length);
    }
}

然后，您可以创建的MemoryStream 是这样的：

using (MemoryStream msReader = new MemoryStream(buffer, false))
{
     // your code here.
}

但是，如果你已经在内存中的数据，你不需要的MemoryStream 。相反，这样做：

    Response.ContentType = "application/pdf";
    Response.AddHeader("Content-Length", buffer.Length.ToString());
    Response.BinaryWrite(buffer);
    //End the response
    Response.End();
    streamDoc.Close();

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