102 lines
3 KiB
Python
102 lines
3 KiB
Python
"""Example FastAPI server for llama.cpp.
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To run this example:
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```bash
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pip install fastapi uvicorn sse-starlette pydantic-settings
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export MODEL=../models/7B/...
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```
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Then run:
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```
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uvicorn llama_cpp.server.app:app --reload
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```
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or
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```
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python3 -m llama_cpp.server
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```
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Then visit http://localhost:8000/docs to see the interactive API docs.
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"""
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import os
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import argparse
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from typing import List, Literal, Union
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import uvicorn
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from llama_cpp.server.app import create_app, Settings
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def get_base_type(annotation):
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if getattr(annotation, '__origin__', None) is Literal:
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return type(annotation.__args__[0])
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elif getattr(annotation, '__origin__', None) is Union:
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non_optional_args = [arg for arg in annotation.__args__ if arg is not type(None)]
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if non_optional_args:
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return get_base_type(non_optional_args[0])
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elif getattr(annotation, '__origin__', None) is list or getattr(annotation, '__origin__', None) is List:
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return get_base_type(annotation.__args__[0])
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else:
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return annotation
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def contains_list_type(annotation) -> bool:
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origin = getattr(annotation, '__origin__', None)
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if origin is list or origin is List:
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return True
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elif origin in (Literal, Union):
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return any(contains_list_type(arg) for arg in annotation.__args__)
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else:
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return False
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def parse_bool_arg(arg):
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if isinstance(arg, bytes):
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arg = arg.decode('utf-8')
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true_values = {'1', 'on', 't', 'true', 'y', 'yes'}
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false_values = {'0', 'off', 'f', 'false', 'n', 'no'}
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arg_str = str(arg).lower().strip()
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if arg_str in true_values:
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return True
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elif arg_str in false_values:
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return False
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else:
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raise ValueError(f'Invalid boolean argument: {arg}')
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if __name__ == "__main__":
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parser = argparse.ArgumentParser()
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for name, field in Settings.model_fields.items():
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description = field.description
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if field.default is not None and description is not None:
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description += f" (default: {field.default})"
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base_type = get_base_type(field.annotation) if field.annotation is not None else str
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list_type = contains_list_type(field.annotation)
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if base_type is not bool:
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parser.add_argument(
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f"--{name}",
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dest=name,
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nargs="*" if list_type else None,
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type=base_type,
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help=description,
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)
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if base_type is bool:
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parser.add_argument(
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f"--{name}",
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dest=name,
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type=parse_bool_arg,
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help=f"{description}",
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)
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args = parser.parse_args()
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settings = Settings(**{k: v for k, v in vars(args).items() if v is not None})
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app = create_app(settings=settings)
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uvicorn.run(
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app, host=os.getenv("HOST", settings.host), port=int(os.getenv("PORT", settings.port)),
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ssl_keyfile=settings.ssl_keyfile, ssl_certfile=settings.ssl_certfile
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)
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