Swagger UI add curl custom parameters

Question

Swagger UI refuses to make a request to https with self signed certificate.

The problem is next:

curl -X POST "https://localhost:8088/Authenticate" -H "accept: pplication/json" -H "Content-Type: application/json" -d "{ \"username\":"user\", \"password\": \"user\"}"

Above command is generated by swagger automatically and after run it returns :

TypeError: Failed to fetch

Manually (not using Swagger UI) run returns :

curl: (60) SSL certificate problem: self signed certificate
More details here: https://curl.haxx.se/docs/sslcerts.html

curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.

I want to make it like next (add --insecure parameter):

curl -X POST "https://localhost:8088/Authenticate" -H "accept: application/json" -H "Content-Type: application/json" -d "{ \"username\": \"user\", \"password\": \"user\"}" --insecure

This will allow me to perform a desired request. Is there a way to add custom parameters to autogenerated Swagger curl? Thanks.

Answer 1

Firstly, the cURL command is for display and copy-pasting only. Swagger UI does not actually use cURL for requests – it's a web page so it makes requests using JavaScript (fetch API or XMLHttpRequest or similar).

As explained here, Swagger UI does not support self-signed certificates (emphasis mine):

It appears you have a problem with your certificate. There's no way for Swagger-UI (or any in-browser application) to bypass the certificate verification process built into the browser, for security reasons that are out of our control.

It looks like you have a self-signed certificate. You'll want to look into how to get your computer to trust your certificate, here's a guide for Google Chrome, which it looks like you're using:

Getting Chrome to accept self-signed localhost certificate

So if you want to use Swagger UI to test a server that uses a self-signed certificate, you'll need to configure your browser (or your computer) to trust that certificate. Check out these questions for suggestions:

Chrome: Getting Chrome to accept self-signed localhost certificate
Firefox: Is there a way to make Firefox ignore invalid ssl-certificates?

Is there a way to add custom parameters to autogenerated Swagger curl?

The code to generate the cURL command lives here:
https://github.com/swagger-api/swagger-ui/blob/master/src/core/curlify.js

You can fork Swagger UI and tweak the code as your needs dictate.

But as explained above – changing the displayed cURL command won't change the actual "try it out" behavior, because "try it out" cannot bypass certificate validation.