init version

.gitignore

@@ -0,0 +1,3 @@
+*.gguf
+llama-server
+llama.cpp

app.py

@@ -1,7 +1,180 @@
+import os
+import requests
+import subprocess
+import json
+import time
+import spaces
 import gradio as gr
+from typing import List, Optional, Tuple, Dict
+
+DEFAULT_SYSTEM = "You are a helpful assistant."
+HF_MODEL_ID = "bartowski/Llama-3.2-1B-Instruct-GGUF"
+HF_FILENAME = "Llama-3.2-1B-Instruct-Q4_K_M.gguf"
+
+###############################################
+
+API_PATH_HEALTH = "/health"
+API_PATH_COMPLETIONS = "/chat/completions"
+LLAMA_CPP_SERVER_BASE = "http://127.0.0.1:8080"
+LLAMA_CPP_SERVER_START_TIMEOUT = 50  # seconds
+
+if not os.path.exists('model.gguf'):
+    url = f"https://huggingface.co/{HF_MODEL_ID}/resolve/main/{HF_FILENAME}"
+    subprocess.check_call(["curl", "-o", "model.gguf", "-L", url])
+
+if not os.path.exists("llama-server"):
+  # FIXME: currently, we can't build inside gradio container because nvcc is missing
+  subprocess.check_call("curl -o llama-server -L https://ngxson-llamacpp-builder.hf.space/llama-server", shell=True)
+  subprocess.check_call("chmod +x llama-server", shell=True)
+
+###############################################
+
+class Role:
+    SYSTEM = "system"
+    USER = "user"
+    ASSISTANT = "assistant"
+
+History = List[Tuple[str, str]]
+Messages = List[Dict[str, str]]
+
+def clear_session() -> History:
+    return "", []
+
+def modify_system_session(system: str) -> str:
+    if system is None or len(system) == 0:
+        system = DEFAULT_SYSTEM
+    return system, system, []
+
+def history_to_messages(history: History, system: str) -> Messages:
+    messages = [{"role": Role.SYSTEM, "content": system}]
+    for h in history:
+        messages.append({"role": Role.USER, "content": h[0]})
+        messages.append({"role": Role.ASSISTANT, "content": h[1]})
+    return messages
+
+
+def messages_to_history(messages: Messages) -> Tuple[str, History]:
+    assert messages[0]["role"] == Role.SYSTEM
+    system = messages[0]["content"]
+    history = []
+    for q, r in zip(messages[1::2], messages[2::2]):
+        history.append([q["content"], r["content"]])
+    return system, history
+
+def wait_until_llamacpp_ready():
+    time.sleep(5)
+    gr.Info("starting llama.cpp server...")
+    trials = 0
+    while True:
+        try:
+            response = requests.get(LLAMA_CPP_SERVER_BASE + API_PATH_HEALTH)
+            if response.status_code == 200:
+                print("Status 200 received. Exiting loop.")
+                break
+            else:
+                print(f"Received status {response.status_code}. Retrying...")
+        except requests.exceptions.RequestException as e:
+            print(f"Request failed: {e}")
+        trials += 1
+        if trials > LLAMA_CPP_SERVER_START_TIMEOUT:
+            raise TimeoutError("llama.cpp server did not start in time")
+        time.sleep(1)  # Wait for 1 second before retrying
+    gr.Info("llama.cpp server is ready.")
+    print("llama.cpp server is ready.")
+
+
+@spaces.GPU
+def model_chat(query: Optional[str], history: Optional[History], system: str
+) -> Tuple[str, str, History]:
+    if query is None:
+        query = ""
+    if history is None:
+        history = []
+
+    # start llama.cpp server
+    proc = subprocess.Popen(["./llama-server"], env=dict(
+        os.environ,
+        LLAMA_HOST="0.0.0.0",
+        LLAMA_PORT="8080",
+        LLAMA_ARG_CTX_SIZE=str(1024 * 32),
+        LLAMA_ARG_FLASH_ATTN="1",
+        LLAMA_ARG_MODEL="model.gguf",
+        LLAMA_ARG_N_PARALLEL="1",
+        LLAMA_ARG_N_GPU_LAYERS="9999",
+        LLAMA_ARG_NO_MMAP="1",
+    ))
+
+    exception = None
+    try:
+        wait_until_llamacpp_ready()
+
+        messages = history_to_messages(history, system)
+        messages.append({"role": Role.USER, "content": query})
+
+        # adapted from https://gist.github.com/ggorlen/7c944d73e27980544e29aa6de1f2ac54
+        url = LLAMA_CPP_SERVER_BASE + API_PATH_COMPLETIONS
+        headers = {
+            # "Authorization": f"Bearer {api_key}",
+            "Content-Type": "application/json"
+        }
+        data = {
+            "temperature": 0.8,
+            "messages": messages,
+            "stream": True
+        }
+        response = requests.post(url, headers=headers, json=data, stream=True)
+        response.raise_for_status()
+
+        curr_text = ""
+        for line in response.iter_lines():
+            line = line.decode("utf-8")
+
+            if line.startswith("data: ") and not line.endswith("[DONE]"):
+                data = json.loads(line[len("data: "):])
+                chunk = data["choices"][0]["delta"].get("content", "")
+                # print(chunk, end="", flush=True)
+                curr_text += chunk
+                system, history = messages_to_history(messages + [{"role": Role.ASSISTANT, "content": curr_text}])
+                yield "", history, system
+    except Exception as e:
+        print(e)
+        exception = e
+    finally:
+        # clean up
+        proc.kill()
+        if exception is not None:
+            # re-raise the exception if needed
+            raise exception
+
+
+with gr.Blocks() as demo:
+    gr.Markdown(f"""<center><font size=6>{HF_MODEL_ID}</center>""")
+
+    with gr.Row():
+        with gr.Column(scale=3):
+            system_input = gr.Textbox(value=DEFAULT_SYSTEM, lines=1, label="System")
+        with gr.Column(scale=1):
+            modify_system = gr.Button("🛠️ Set system prompt and clear history", scale=2)
+        system_state = gr.Textbox(value=DEFAULT_SYSTEM, visible=False)
+    chatbot = gr.Chatbot(label=HF_MODEL_ID)
+    textbox = gr.Textbox(lines=2, label="Input")
+
+    with gr.Row():
+        clear_history = gr.Button("🧹 Clear history")
+        sumbit = gr.Button("🚀 Send")
+
+    sumbit.click(model_chat,
+                 inputs=[textbox, chatbot, system_state],
+                 outputs=[textbox, chatbot, system_input],
+                 concurrency_limit = 5)
+    clear_history.click(fn=clear_session,
+                        inputs=[],
+                        outputs=[textbox, chatbot])
+    modify_system.click(fn=modify_system_session,
+                        inputs=[system_input],
+                        outputs=[system_state, system_input, chatbot])
+
+demo.queue(api_open=False)
+demo.launch(max_threads=5)
 
-def greet(name):
-    return "Hello " + name + "!!"
 
-demo = gr.Interface(fn=greet, inputs="text", outputs="text")
-demo.launch()