1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
from __future__ import annotations
import logging
import json
import uvicorn
import secrets
from fastapi import FastAPI, Response, Request
from fastapi.responses import StreamingResponse, RedirectResponse, HTMLResponse, JSONResponse
from fastapi.exceptions import RequestValidationError
from fastapi.security import APIKeyHeader
from starlette.exceptions import HTTPException
from starlette.status import HTTP_422_UNPROCESSABLE_ENTITY, HTTP_401_UNAUTHORIZED, HTTP_403_FORBIDDEN
from fastapi.encoders import jsonable_encoder
from pydantic import BaseModel
from typing import Union, Optional
import g4f
import g4f.debug
from g4f.client import AsyncClient
from g4f.typing import Messages
from g4f.cookies import read_cookie_files
def create_app():
app = FastAPI()
api = Api(app)
api.register_routes()
api.register_authorization()
api.register_validation_exception_handler()
if not AppConfig.ignore_cookie_files:
read_cookie_files()
return app
def create_app_debug():
g4f.debug.logging = True
return create_app()
class ChatCompletionsForm(BaseModel):
messages: Messages
model: str
provider: Optional[str] = None
stream: bool = False
temperature: Optional[float] = None
max_tokens: Optional[int] = None
stop: Union[list[str], str, None] = None
api_key: Optional[str] = None
web_search: Optional[bool] = None
proxy: Optional[str] = None
class AppConfig():
list_ignored_providers: Optional[list[str]] = None
g4f_api_key: Optional[str] = None
ignore_cookie_files: bool = False
@classmethod
def set_config(cls, **data):
for key, value in data.items():
setattr(cls, key, value)
class Api:
def __init__(self, app: FastAPI) -> None:
self.app = app
self.client = AsyncClient()
self.get_g4f_api_key = APIKeyHeader(name="g4f-api-key")
def register_authorization(self):
@self.app.middleware("http")
async def authorization(request: Request, call_next):
if AppConfig.g4f_api_key and request.url.path in ["/v1/chat/completions", "/v1/completions"]:
try:
user_g4f_api_key = await self.get_g4f_api_key(request)
except HTTPException as e:
if e.status_code == 403:
return JSONResponse(
status_code=HTTP_401_UNAUTHORIZED,
content=jsonable_encoder({"detail": "G4F API key required"}),
)
if not secrets.compare_digest(AppConfig.g4f_api_key, user_g4f_api_key):
return JSONResponse(
status_code=HTTP_403_FORBIDDEN,
content=jsonable_encoder({"detail": "Invalid G4F API key"}),
)
return await call_next(request)
def register_validation_exception_handler(self):
@self.app.exception_handler(RequestValidationError)
async def validation_exception_handler(request: Request, exc: RequestValidationError):
details = exc.errors()
modified_details = [{
"loc": error["loc"],
"message": error["msg"],
"type": error["type"],
} for error in details]
return JSONResponse(
status_code=HTTP_422_UNPROCESSABLE_ENTITY,
content=jsonable_encoder({"detail": modified_details}),
)
def register_routes(self):
@self.app.get("/")
async def read_root():
return RedirectResponse("/v1", 302)
@self.app.get("/v1")
async def read_root_v1():
return HTMLResponse('g4f API: Go to '
'<a href="/v1/chat/completions">chat/completions</a> '
'or <a href="/v1/models">models</a>.')
@self.app.get("/v1/models")
async def models():
model_list = {
model: g4f.models.ModelUtils.convert[model]
for model in g4f.Model.__all__()
}
model_list = [{
'id': model_id,
'object': 'model',
'created': 0,
'owned_by': model.base_provider
} for model_id, model in model_list.items()]
return JSONResponse(model_list)
@self.app.get("/v1/models/{model_name}")
async def model_info(model_name: str):
try:
model_info = g4f.models.ModelUtils.convert[model_name]
return JSONResponse({
'id': model_name,
'object': 'model',
'created': 0,
'owned_by': model_info.base_provider
})
except:
return JSONResponse({"error": "The model does not exist."})
@self.app.post("/v1/chat/completions")
async def chat_completions(config: ChatCompletionsForm, request: Request = None, provider: str = None):
try:
config.provider = provider if config.provider is None else config.provider
if config.api_key is None and request is not None:
auth_header = request.headers.get("Authorization")
if auth_header is not None:
auth_header = auth_header.split(None, 1)[-1]
if auth_header and auth_header != "Bearer":
config.api_key = auth_header
response = self.client.chat.completions.create(
**config.dict(exclude_none=True),
ignored=AppConfig.list_ignored_providers
)
except Exception as e:
logging.exception(e)
return Response(content=format_exception(e, config), status_code=500, media_type="application/json")
if not config.stream:
return JSONResponse((await response).to_json())
async def streaming():
try:
async for chunk in response:
yield f"data: {json.dumps(chunk.to_json())}\n\n"
except GeneratorExit:
pass
except Exception as e:
logging.exception(e)
yield f'data: {format_exception(e, config)}\n\n'
yield "data: [DONE]\n\n"
return StreamingResponse(streaming(), media_type="text/event-stream")
@self.app.post("/v1/completions")
async def completions():
return Response(content=json.dumps({'info': 'Not working yet.'}, indent=4), media_type="application/json")
def format_exception(e: Exception, config: ChatCompletionsForm) -> str:
last_provider = g4f.get_last_provider(True)
return json.dumps({
"error": {"message": f"{e.__class__.__name__}: {e}"},
"model": last_provider.get("model") if last_provider else config.model,
"provider": last_provider.get("name") if last_provider else config.provider
})
def run_api(
host: str = '0.0.0.0',
port: int = 1337,
bind: str = None,
debug: bool = False,
workers: int = None,
use_colors: bool = None
) -> None:
print(f'Starting server... [g4f v-{g4f.version.utils.current_version}]' + (" (debug)" if debug else ""))
if use_colors is None:
use_colors = debug
if bind is not None:
host, port = bind.split(":")
uvicorn.run(
f"g4f.api:create_app{'_debug' if debug else ''}",
host=host, port=int(port),
workers=workers,
use_colors=use_colors,
factory=True,
reload=debug
)
|
