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examples/llmguard_prompt_injection_filter_pipeline.py

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+"""
+title: LLM Guard Filter Pipeline
+author: jannikstdl
+date: 2024-05-30
+version: 1.0
+license: MIT
+description: A pipeline for filtering out potential prompt injections using the LLM Guard library.
+requirements: llm-guard
+"""
+
+from typing import List, Optional
+from schemas import OpenAIChatMessage
+from pydantic import BaseModel
+from llm_guard.input_scanners import PromptInjection
+from llm_guard.input_scanners.prompt_injection import MatchType
+import os
+
+class Pipeline:
+    def __init__(self):
+        # Pipeline filters are only compatible with Open WebUI
+        # You can think of filter pipeline as a middleware that can be used to edit the form data before it is sent to the OpenAI API.
+        self.type = "filter"
+
+        # Optionally, you can set the id and name of the pipeline.
+        # Assign a unique identifier to the pipeline.
+        # The identifier must be unique across all pipelines.
+        # The identifier must be an alphanumeric string that can include underscores or hyphens. It cannot contain spaces, special characters, slashes, or backslashes.
+        self.id = "llmguard_prompt_injection_filter_pipeline"
+        self.name = "LLMGuard Prompt Injection Filter"
+
+        class Valves(BaseModel):
+            # List target pipeline ids (models) that this filter will be connected to.
+            # If you want to connect this filter to all pipelines, you can set pipelines to ["*"]
+            # e.g. ["llama3:latest", "gpt-3.5-turbo"]
+            pipelines: List[str] = []
+
+            # Assign a priority level to the filter pipeline.
+            # The priority level determines the order in which the filter pipelines are executed.
+            # The lower the number, the higher the priority.
+            priority: int = 0
+
+        # Initialize
+        self.valves = Valves(
+            **{
+                "pipelines": ["*"],  # Connect to all pipelines
+            }
+        )
+
+        self.model = None
+
+        pass
+
+    async def on_startup(self):
+        # This function is called when the server is started.
+        print(f"on_startup:{__name__}")
+
+        self.model = PromptInjection(threshold=0.8, match_type=MatchType.FULL)
+        pass
+
+    async def on_shutdown(self):
+        # This function is called when the server is stopped.
+        print(f"on_shutdown:{__name__}")
+        pass
+
+    async def on_valves_updated(self):
+        # This function is called when the valves are updated.
+        pass
+
+    async def inlet(self, body: dict, user: Optional[dict] = None) -> dict:
+        # This filter is applied to the form data before it is sent to the OpenAI API.
+        print(f"inlet:{__name__}")
+
+        user_message = body["messages"][-1]["content"]
+
+        # Filter out prompt injection messages
+        sanitized_prompt, is_valid, risk_score = self.model.scan(user_message)
+
+        if risk_score > 0.8: 
+            raise Exception("Prompt injection detected")
+
+        return body