Automatically Reply to HTTP Requests

Automatically Reply to HTTP Requests

Learn how to simulate server responses without chnaging the server code

Simulate server responses with HTTP Debugger

Auto-responder allows to simulate a server response (or a server error) with a custom HTTP headers and content. This may be useful to test your code in specific situations that are difficult to reproduce in a normal flow.

Note: Auto-responder applies to regular HTTP and HTTPS requests. gRPC calls and WebSocket connections are captured in read-only mode and are not replaced by auto-responder rules.

Request Header Regex

Regexp rules to match the request header. If you provide more then one regexp rule, all of those rules must match. Regexp rules are case insensitive.

Match HTTP Method and URL Part

^GET\s+/index\.html\s+HTTP/

Match Host Name

Host:.*httpdebugger\.com

Respond With Header

The HTTP response header that will be send back to your web browser or application. It must be a valid HTTP header with a status code, and optionally with cookies, CORS headers, etc.

Respond With Content

The HTTP response content that will be send to your web browser or application. HTTP Debugger will automatically calculate the Content-Length for your content, but you need to provide a valid Content-Type for it.

Respond With a File

You can tell HTTP Debugger to respond with a file from your local disk. HTTP Debugger will automatically calculate the Content-Length for that file, but you need to provide a valid Content-Type for it.

Response Header Samples

OK with Some Content

HTTP/1.1 200 OK
Content-Type: text/html
Content-Length: 46
Connection: close

302 Redirect To HTTP Debugger Website

HTTP/1.1 302 Found
Location: http://www.httpdebugger.com
Connection: close

404 Page Not Found

HTTP/1.1 404 Page Not Found
Content-Type: text/html
Content-Length: 0
Connection: close

500 Internal Server Error

HTTP/1.1 500 Internal Server Error
Content-Type: text/html
Content-Length: 0
Connection: close

Create rules from from grid's context menu

You can quickly create an auto-responder rule for the selected HTTP request from the grid's context menu.

Note: Browsers tend to cache Internet connections, therefore it's recommended to restart the browser for changes to take effect. To improve the performance, it is recommended to disable the auto-responder, if it is not used.

If you need to modify your server response by adding/removing some header parameters or by making small changes in content, then consider using the HTTP Modifier instead of Auto-responder.