Extracting Filename from HTTP Request Body in Traffic Parrot Response Template

We got a question yesterday from one of our prospects.

"Is it possible to get a filename from a HTTP request body byte array? Can you send me an example?" - Software Developer evaluating Traffic Parrot

Yes! The simplest way to do this is using a regexp. For example, create a mapping where the response body is (see attached screenshot for details):

{{ regex request.body 'filename=\"([^\"]+)\"' 'g' }}

You can then test it like this for example:

support@support-pcs:~/Downloads$ curl -X POST http://localhost:8081/hello -H "Content-Type: multipart/form-data" -F "file=@helloworld.pdf" -v

Note: Unnecessary use of -X or --request, POST is already inferred.
*   Trying 127.0.0.1:8081...
* Connected to localhost (127.0.0.1) port 8081 (#0)
> POST /hello HTTP/1.1
> Host: localhost:8081
> User-Agent: curl/7.81.0
> Accept: */*
> Content-Length: 7497
> Content-Type: multipart/form-data; boundary=------------------------1417eab3cd6fdb0a
>

* We are completely uploaded and fine
* Mark bundle as not supporting multiuse

< HTTP/1.1 200 OK
< Matched-Stub-Id: 8c4695d4-f94e-4ba8-9793-ee5dcbfba6b
< Matched-Stub-Name: hello-8c4695d4-f94e-4ba8-9793-ee5dcbfba6b5.json
< Vary: Accept-Encoding, User-Agent
< Content-Length: 41
< Server: Jetty(9.4.56.v20240826)
<
Request contains a file: helloworld.pdf