Adding embedding support using huggingface to app.py

interference/app.py

@@ -3,7 +3,7 @@ import random
 import string
 import time
 from typing import Any
-
+import requests
 from flask import Flask, request
 from flask_cors import CORS
 
@@ -88,6 +88,70 @@ def chat_completions():
     return app.response_class(streaming(), mimetype="text/event-stream")
 
 
+#Get the embedding from huggingface
+def get_embedding(input_text, token):
+    huggingface_token = token
+    embedding_model = "sentence-transformers/all-mpnet-base-v2"
+    max_token_length = 500
+
+    # Load the tokenizer for the "all-mpnet-base-v2" model
+    tokenizer = AutoTokenizer.from_pretrained(embedding_model)
+    # Tokenize the text and split the tokens into chunks of 500 tokens each
+    tokens = tokenizer.tokenize(input_text)
+    token_chunks = [tokens[i:i + max_token_length] for i in range(0, len(tokens), max_token_length)]
+
+    # Initialize an empty list
+    embeddings = []
+
+    # Create embeddings for each chunk
+    for chunk in token_chunks:
+        # Convert the chunk tokens back to text
+        chunk_text = tokenizer.convert_tokens_to_string(chunk)
+
+        # Use the Hugging Face API to get embeddings for the chunk
+        api_url = f"https://api-inference.huggingface.co/pipeline/feature-extraction/{embedding_model}"
+        headers = {"Authorization": f"Bearer {huggingface_token}"}
+        chunk_text = chunk_text.replace("\n", " ")
+    
+        # Make a POST request to get the chunk's embedding
+        response = requests.post(api_url, headers=headers, json={"inputs": chunk_text, "options": {"wait_for_model": True}})
+    
+        # Parse the response and extract the embedding
+        chunk_embedding = response.json()
+        # Append the embedding to the list
+        embeddings.append(chunk_embedding)
+
+    #averaging all the embeddings
+    #this isn't very effective
+    #someone a better idea?
+    num_embeddings = len(embeddings)
+    average_embedding = [sum(x) / num_embeddings for x in zip(*embeddings)]
+    embedding = average_embedding
+    return embedding
+
+
+@app.route("/embeddings", methods=["POST"])
+def embeddings():
+    input_text_list = request.get_json().get("input")
+    input_text = ' '.join(map(str, input_text_list))
+    token = request.headers.get('Authorization').replace("Bearer ", "")
+    embedding = get_embedding(input_text, token)
+    return {
+  "data": [
+    {
+     "embedding": embedding,
+     "index": 0,
+     "object": "embedding"
+   }
+  ],
+ "model": "text-embedding-ada-002",
+  "object": "list",
+  "usage": {
+    "prompt_tokens": None,
+    "total_tokens": None
+  }
+  }
+
 def main():
     app.run(host="0.0.0.0", port=1337, debug=True)