How to use Charles' rewrite tool only on certain methods?

user_3599414 0
Viewed 6675

I'm using Charles' Rewrite Tool to change 200 responses to 400 in order to test failing API calls. However, the rewrite is triggering on the Options request. I'd like to only have it trigger on the Get or Post requests and allow the Options requests through. Is this possible using Charles?

Rewrite Screen

charles-proxy
4 Answers

We were able to work around the issue by assuming that OPTIONS would always return an empty body.

The below Regex values will match for GET (because it has a response body) and not match for OPTIONS (because it doesn't have a response body).

\{[\S\s]*\}

or

\[[\S\s]*\]

Rewrite Rule

user_60598050

I think Charles does not have this option, which is really a pitty, because it seems to be easy to implement and it would open the doors to the API world.

I would suggest you to ask Karl (the author and main developer) for this new feature at the contact section of the site.

user_13765490

We have this exact same need to mock API responses. Since the Rewrite tool doesn't support this feature, we have setup Breakpoints on the responses we want to mock, once the breakpoint is hit, we change the response to whatever we want. It works, but is less than ideal.

user_10603330

Unfortunately, Charles doesn't have this feature to filter out which the Request that has certain HTTP Method.

It's not a direct answer, but you can achieve with Scripting tool from Proxyman

scripting to change https status code

function onResponse(context, url, request, response) {

  // Update status Code
  response.statusCode = 500;

  // Done
  return response;
}

Here is the Snippet Code that you can do with JS Code.

Disclaimer: I'm a creator of Proxyman. Since there are many people who struggle with this problem, hopefully, the Scripting tool can help you.

user_31274770
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