File secure code#
Name it MyPdfDownload.pdf, or change the code below to reflect the file name you've saved in the above folder. xls etc.) and store it in the above directory.
File secure pdf#
pdf file (you can select any downloadable (. To design the application, first create a folder called C:\My External\File Path\.
File secure update#
Simply update the variables in the appropriate line of code below. Note, this folder exists in the C:\ drive and doesn't appear anywhere near C:\Inetpub\exists in the above folder. My code below assumes that you've created a folder called C:\My External\File Path\. I'm using VB.NET, but this can just as easily be done using C#. aspx page is going to behave more like a file-download. What we're going to do is open a file stream and serve that instead of the usual text content. In other words, you might link to MyFileServer.aspx and receive MyPdfDownload.pdf, for example - with no actual link to MyPdfDownload.pdf offered anywhere on your web-site. The simple solution below closes the above security hole by storing the downloadable file outside a web-site and then serving the file directly from a web page. And if you're hosting your site with an external ISP, it's highly unlikely that they'll allow you to create and delete user accounts on their server at will. This makes for an administration nightmare (not to mention an even bigger system security issue). This is not really viable though, as you would need to create a new system (Windows) account for each registration, send the person their username & password, and then remove their user account from the system once they have downloaded the file. One alternative is to place system security on the folder in which these files reside. You can't place logic in these files to decide whether or not to serve them. exe) has no way to decide whether it should serve itself or not. The problem lies in the fact that your downloadable file (whether it be a. A simple "View Source" circumvents all these security measures.
I've seen sites that go to great lengths to "hide" these links (including masking the link by writing specific text in the browser's status bar when a user hovers over it). None of the security features you put in place are worth anything if a user knows that final link to the downloadable file itself. Once someone has that link, they can offer it to their friends and colleagues, who then simply circumvent all of your security features and download the file directly. The key problem in this scenario is the fact that, no matter which way you look at it, ultimately, you have to offer users a link to the downloadable file. All too often, people don't even want to do that and they seek ways to circumvent the web server's security. All they ask in return is that the person downloading the file simply enters some personal details, or fills out a form for the administrator's records. Many web-sites offer useful files for free. How do I protect my files from theft? Very often, the problem doesn't even concern payment. If you've developed any kind of e-commerce system that offers downloadable files, you've faced this problem.
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