Building your Drawbridge

Drawbridge is a part of the Prompt Defender project that is responsible for validating the response of an LLM execution.
That is - after you have executed an LLM, you can use Drawbridge to check the response for any potential security
issues.

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Drawbridge is currently only available from within the python SDK

Drawbridge is used to validate the response of an LLM execution. It has two main functionalities:

• Checking for a canary in the response.

• Cleaning the response by removing scripts if allow_unsafe_scripts is set to False.

Recipe

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Building your Drawbridge

Open Recipe

Example

Here is example usage:

Python

from drawbridge import build_drawbridge

# Create a Drawbridge instance
drawbridge = build_drawbridge(canary="test_canary")

# Validate and clean a response
response = "<script>alert('Hello!');</script>test_canary"
response_ok, cleaned_response = drawbridge.validate_response_and_clean(response)

print(f"Response OK: {response_ok}")
print(f"Cleaned Response: {cleaned_response}")

In this example, we first import the build_drawbridge function from the drawbridge module. We then use this function
to
create a Drawbridge instance, specifying a canary string that we want to check for in the response.

Next, we have a response string that we want to validate and clean. We pass this response to the
validate_response_and_clean method of our Drawbridge instance. This method returns two values:

• response_ok: This is a boolean value that indicates whether the canary was found in the response.
• cleaned_response: This is the cleaned version of the response. If allow_unsafe_scripts is False (which is the
  default),
  any scripts in the response will be removed.