93 lines
3.5 KiB
Python
93 lines
3.5 KiB
Python
import json
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import urllib.request
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import urllib.error
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class LLMClient:
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class Message:
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def __init__(self, msg):
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self.content = msg.get('content', '')
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self.tool_calls = msg.get('tool_calls', None)
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self.warning = None
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def __init__(self, base_url, model, api_key, timeout=600):
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self.base_url = base_url.rstrip('/')
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self.model = model
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self.api_key = api_key
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self.timeout = timeout
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def chat(self, messages, tools=None):
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url = f"{self.base_url}/chat/completions"
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payload = {
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"model": self.model,
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"messages": messages
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}
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if tools:
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payload["tools"] = tools
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payload["tool_choice"] = "auto"
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data = json.dumps(payload).encode('utf-8')
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req = urllib.request.Request(url, data=data, method='POST')
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req.add_header('Content-Type', 'application/json')
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req.add_header('Authorization', f'Bearer {self.api_key}')
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try:
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with urllib.request.urlopen(req, timeout=self.timeout) as resp:
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raw = resp.read().decode('utf-8')
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response = json.loads(raw)
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except urllib.error.HTTPError as e:
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body_text = ""
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try:
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body_text = e.read().decode('utf-8', errors='replace')
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except Exception:
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pass
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if tools and e.code == 404:
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try:
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body = json.loads(body_text) if body_text else {}
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if 'tool use' in body.get('error', {}).get('message', '').lower():
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result = self.chat(messages, tools=None)
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result.warning = "Tool calling not supported by this model. Running in chat-only mode."
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return result
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except Exception:
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pass
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detail = f" - {body_text[:500]}" if body_text else ""
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return self.Message({'content': f"HTTP Error: {e.code} {e.reason}{detail}", 'tool_calls': None})
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except Exception as e:
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return self.Message({'content': f"Error: {str(e)}", 'tool_calls': None})
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if 'choices' not in response:
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raw_preview = json.dumps(response)[:500]
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return self.Message({
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'content': (
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f"Error: Unexpected response — 'choices' key missing.\n"
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f" URL : {url}\n"
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f" Model : {self.model}\n"
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f" Response: {raw_preview}"
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),
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'tool_calls': None
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})
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if not response['choices']:
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raw_preview = json.dumps(response)[:500]
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return self.Message({
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'content': (
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f"Error: 'choices' is empty in the response.\n"
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f" URL : {url}\n"
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f" Model : {self.model}\n"
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f" Response: {raw_preview}"
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),
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'tool_calls': None
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})
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if 'message' not in response['choices'][0]:
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raw_preview = json.dumps(response['choices'][0])[:500]
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return self.Message({
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'content': (
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f"Error: 'message' key missing in first choice.\n"
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f" URL : {url}\n"
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f" Model : {self.model}\n"
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f" Choice : {raw_preview}"
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),
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'tool_calls': None
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})
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message = response['choices'][0]['message']
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return self.Message(message)
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