What is MIME type "application/x-aspx"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

application/x-aspx is a MIME type used with Microsoft’s ASP.NET technology. It tells the server to run embedded code and then send HTML to the browser.

Files using this type combine logic with markup. The server processes them dynamically to create web pages.

Dynamic Page Generation: Converts ASP.NET pages into standard HTML in real time.
Custom HTTP Handlers: Uses files like ASHX to manage specific requests.
Web Services: Implements service endpoints with files like ASMX.
Reusable UI Components: Embeds user controls via ASCX files.
Application-Level Events: Handles global events using files like ASAX.

Files commonly associated with this MIME type include ASPX for main pages and AXD for resources or debug tools. These file types work together to deliver dynamic content, manage requests, and handle advanced application tasks.

For more details on ASP.NET and its file processing, visit Microsoft ASP.NET documentation.

Associated file extensions

.aspx, .ashx, .axd, .asmx, .ascx, .asax

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: application/x-aspx

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="application/x-aspx">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');    
    
    http.createServer((req, res) => {    
      res.setHeader('Content-Type', 'application/x-aspx');    
      res.end('Content here');    
    }).listen(3000);

Associated file extensions

.aspx, .ashx, .axd, .asmx, .ascx, .asax

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.