Steps to replicate the issue (include links if applicable):
- Go to Special:ApiSandbox on a wiki.
- Select the "parse" module.
- Enter a few kilobytes of text into a field such as "text".
- Attempt to send the request.
What happens?:
An error occurred while loading the API query response: HTTP error: .
What should have happened instead?:
The content is parsed and the API result is displayed.
Other information (browser name/version, screenshots, etc.):
This is likely caused by rMWd378200408ae: ApiSandbox: Only use POST and multipart/form-data when necessary which changed ApiSandbox to start using GET rather than POST when a module isn't flagged as specifically requiring POST, without regard for whether the request being made would exceed the length limitation on a GET request.