78 lines
2.3 KiB
Python
78 lines
2.3 KiB
Python
"""Ollama LLM client with retry and response cleaning."""
|
|
|
|
import json
|
|
import logging
|
|
import re
|
|
import time
|
|
import urllib.request
|
|
import urllib.error
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
DEFAULT_URL = "http://192.168.0.145:31434"
|
|
DEFAULT_MODEL = "qwen3-coder:latest"
|
|
|
|
|
|
class OllamaUnavailableError(Exception):
|
|
pass
|
|
|
|
|
|
def ollama_available(url: str = DEFAULT_URL) -> bool:
|
|
"""Quick health check — GET /api/tags."""
|
|
try:
|
|
req = urllib.request.Request(f"{url.rstrip('/')}/api/tags")
|
|
with urllib.request.urlopen(req, timeout=5):
|
|
return True
|
|
except Exception:
|
|
return False
|
|
|
|
|
|
_last_call_time = 0.0
|
|
MIN_CALL_INTERVAL = 2.0 # seconds between calls to avoid overwhelming Ollama
|
|
|
|
|
|
def ollama_generate(
|
|
prompt: str,
|
|
model: str = DEFAULT_MODEL,
|
|
url: str = DEFAULT_URL,
|
|
max_retries: int = 3,
|
|
timeout: int = 120,
|
|
temperature: float = 0.3,
|
|
num_predict: int = 2000,
|
|
) -> str:
|
|
"""Generate text from Ollama with retry + backoff. Returns cleaned response."""
|
|
global _last_call_time
|
|
elapsed = time.time() - _last_call_time
|
|
if elapsed < MIN_CALL_INTERVAL:
|
|
time.sleep(MIN_CALL_INTERVAL - elapsed)
|
|
_last_call_time = time.time()
|
|
|
|
data = json.dumps({
|
|
"model": model,
|
|
"prompt": prompt,
|
|
"stream": False,
|
|
"options": {"temperature": temperature, "num_predict": num_predict},
|
|
}).encode()
|
|
req = urllib.request.Request(
|
|
f"{url.rstrip('/')}/api/generate",
|
|
data=data,
|
|
headers={"Content-Type": "application/json"},
|
|
)
|
|
|
|
last_error = None
|
|
for attempt in range(max_retries):
|
|
try:
|
|
with urllib.request.urlopen(req, timeout=timeout) as resp:
|
|
result = json.loads(resp.read())
|
|
raw = result.get("response", "").strip()
|
|
return re.sub(r"<think>.*?</think>", "", raw, flags=re.DOTALL).strip()
|
|
except (urllib.error.URLError, TimeoutError, OSError) as e:
|
|
last_error = e
|
|
if attempt < max_retries - 1:
|
|
wait = 2 ** attempt
|
|
log.warning("Ollama attempt %d/%d failed: %s — retrying in %ds",
|
|
attempt + 1, max_retries, e, wait)
|
|
time.sleep(wait)
|
|
|
|
raise OllamaUnavailableError(f"Ollama unavailable after {max_retries} attempts: {last_error}")
|