276 lines
9.4 KiB
Python
276 lines
9.4 KiB
Python
"""
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S4 Custom Deepseek Text Node
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Author: S4MUEL
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GitHub: https://github.com/S4MUEL-404/ComfyUI-S4API
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Deepseek text generation node with custom API key input.
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"""
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import requests
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import json
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import os
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import hashlib
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from typing import Optional
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class S4TextWithDeepseek:
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"""
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Generates text via Deepseek API endpoint.
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"""
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# Fixed API configuration
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API_URL = "https://api.deepseek.com/v1/chat/completions"
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def __init__(self):
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# Ensure cache directory exists
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self.cache_dir = os.path.join(os.path.dirname(os.path.dirname(__file__)), "cache")
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os.makedirs(self.cache_dir, exist_ok=True)
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@classmethod
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def INPUT_TYPES(cls):
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return {
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"required": {
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"system_prompt": (
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"STRING",
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{
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"multiline": True,
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"default": "",
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"tooltip": "System instruction for the AI",
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},
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),
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"user_prompt": (
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"STRING",
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{
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"multiline": True,
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"default": "",
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"tooltip": "User prompt for Deepseek",
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},
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),
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"api_key": (
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"STRING",
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{
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"multiline": False,
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"default": "",
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"tooltip": "Your Deepseek API Key"
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}
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),
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"model": (
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["deepseek-chat", "deepseek-reasoner"],
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{
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"default": "deepseek-chat",
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"tooltip": "Choose Deepseek model",
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},
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),
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"max_tokens": (
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"INT",
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{
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"default": 2048,
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"min": 1,
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"max": 32768,
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"step": 1,
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"display": "number",
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"tooltip": "Maximum number of tokens to generate",
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},
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),
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"temperature": (
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"FLOAT",
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{
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"default": 0.7,
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"min": 0.0,
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"max": 2.0,
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"step": 0.1,
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"display": "number",
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"tooltip": "Sampling temperature (0.0 = deterministic, 2.0 = very random)",
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},
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),
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"top_p": (
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"FLOAT",
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{
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"default": 0.95,
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"min": 0.0,
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"max": 1.0,
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"step": 0.05,
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"display": "number",
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"tooltip": "Top-p sampling threshold",
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},
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),
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"seed": (
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"INT",
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{
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"default": 0,
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"min": 0,
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"max": 2147483647,
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"step": 1,
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"display": "number",
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"control_after_generate": True,
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"tooltip": "Random seed for reproducible results (32-bit limit for Deepseek API)",
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},
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),
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},
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}
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RETURN_TYPES = ("STRING",)
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RETURN_NAMES = ("text",)
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FUNCTION = "generate_text"
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CATEGORY = "💀PromptsO"
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DESCRIPTION = "Generates text using Deepseek API with custom API key."
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def validate_inputs(self, user_prompt: str, api_key: str) -> None:
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"""Validate input parameters"""
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if not user_prompt or not user_prompt.strip():
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raise ValueError("User prompt cannot be empty")
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if not api_key or not api_key.strip():
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raise ValueError("API key cannot be empty")
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def generate_cache_key(self, system_prompt: str, user_prompt: str, model: str,
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max_tokens: int, temperature: float, top_p: float, seed: int) -> str:
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"""Generate cache key based on input parameters"""
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cache_data = {
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"system_prompt": system_prompt.strip(),
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"user_prompt": user_prompt.strip(),
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"model": model,
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"max_tokens": max_tokens,
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"temperature": temperature,
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"top_p": top_p,
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"seed": seed
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}
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cache_str = json.dumps(cache_data, sort_keys=True)
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return hashlib.md5(cache_str.encode()).hexdigest()
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def load_from_cache(self, cache_key: str) -> Optional[str]:
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"""Load result from cache if exists"""
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cache_file = os.path.join(self.cache_dir, f"{cache_key}.json")
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if os.path.exists(cache_file):
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try:
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with open(cache_file, 'r', encoding='utf-8') as f:
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cache_data = json.load(f)
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return cache_data.get("result")
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except Exception as e:
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print(f"⚠️ Failed to load cache: {e}")
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return None
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def save_to_cache(self, cache_key: str, result: str) -> None:
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"""Save result to cache"""
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cache_file = os.path.join(self.cache_dir, f"{cache_key}.json")
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try:
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cache_data = {
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"result": result,
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"timestamp": json.dumps({"time": "cached"})
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}
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with open(cache_file, 'w', encoding='utf-8') as f:
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json.dump(cache_data, f, ensure_ascii=False, indent=2)
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except Exception as e:
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print(f"⚠️ Failed to save cache: {e}")
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def generate_text(
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self,
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system_prompt,
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user_prompt,
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api_key,
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model="deepseek-chat",
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max_tokens=2048,
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temperature=0.7,
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top_p=0.95,
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seed=0,
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):
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self.validate_inputs(user_prompt, api_key)
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# Generate cache key
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cache_key = self.generate_cache_key(
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system_prompt, user_prompt, model, max_tokens, temperature, top_p, seed
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)
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# Check cache first
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cached_result = self.load_from_cache(cache_key)
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if cached_result:
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print(f"💾 Using cached result for seed {seed}")
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return (cached_result,)
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# Prepare messages
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messages = []
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# Add system message if provided
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if system_prompt and system_prompt.strip():
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messages.append({
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"role": "system",
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"content": system_prompt.strip()
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})
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# Add user message
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messages.append({
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"role": "user",
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"content": user_prompt
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})
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# Prepare request data
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data = {
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"model": model,
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"messages": messages,
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"max_tokens": max_tokens,
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"temperature": temperature,
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"top_p": top_p,
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"stream": False
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}
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# Add seed for reproducible results
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if seed > 0:
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data["seed"] = seed
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# Make API call
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headers = {
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"Authorization": f"Bearer {api_key}",
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"Content-Type": "application/json"
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}
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print(f"🤖 Generating text with Deepseek...")
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print(f" • Model: {model}")
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print(f" • User prompt: {user_prompt[:50]}{'...' if len(user_prompt) > 50 else ''}")
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if system_prompt.strip():
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print(f" • System prompt: {system_prompt[:30]}{'...' if len(system_prompt) > 30 else ''}")
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print(f" • Max tokens: {max_tokens}")
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print(f" • Temperature: {temperature}")
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print(f" • Top-p: {top_p}")
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print(f" • Seed: {seed}")
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print(f" • Cache key: {cache_key[:8]}...")
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try:
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response = requests.post(
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self.API_URL,
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headers=headers,
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json=data,
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timeout=120
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)
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if response.status_code != 200:
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error_data = response.json() if response.content else {}
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error_msg = error_data.get("error", {}).get("message", response.text)
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raise Exception(f"API request failed with status {response.status_code}: {error_msg}")
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# Parse response
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result = response.json()
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if "choices" not in result or not result["choices"]:
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raise Exception("No response generated from API")
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# Extract generated text
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generated_text = result["choices"][0]["message"]["content"]
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# Log usage information
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if "usage" in result:
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usage = result["usage"]
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print(f"📊 Token usage:")
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print(f" • Prompt tokens: {usage.get('prompt_tokens', 0)}")
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print(f" • Completion tokens: {usage.get('completion_tokens', 0)}")
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print(f" • Total tokens: {usage.get('total_tokens', 0)}")
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print(f"✅ Text generated successfully!")
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print(f" • Response length: {len(generated_text)} characters")
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# Save to cache
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self.save_to_cache(cache_key, generated_text)
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return (generated_text,)
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except Exception as e:
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print(f"❌ Error generating text: {str(e)}")
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raise e |