User: I 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({
                "object": "list",
                "data": 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
                # Use the asynchronous create method and await it
                response = await self.client.chat.completions.async_create(
                    **{
                        **AppConfig.defaults,                                                  **config.dict(exclude_none=True),                                  },
                    ignored=AppConfig.ignored_providers
                )
                if not config.stream:                                                      return JSONResponse(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")                                                                                                                                            except Exception as e:
                logging.exception(e)
                return Response(content=format_exception(e, config), status_code=500, media_type="application/json")                          
        @self.app.post("/v1/completions")                                      async def completions():
            return Response(content=json.dumps({'info': 'Not working yet.'}, indent=4), media_type="application/json")

        @self.app.post("/v1/images/generations")
        async def images_generate(config: ImagesGenerateForm, 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
                # Use the asynchronous generate method and await it
                response = await self.client.images.async_generate(                        **config.dict(exclude_none=True),                                  )                                                                      return JSONResponse(response.to_json())
            except Exception as e:
                logging.exception(e)
                return Response(content=format_exception(e, config), status_code=500, 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
    )
User: (venv) root@localhost:~/gpt4free/g4f/api# cat __init__.py
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 fastapi.middleware.cors import CORSMiddleware
from pydantic import BaseModel
from typing import Union, Optional                                     
import g4f
import g4f.debug
from g4f.client import Client
from g4f.typing import Messages
from g4f.cookies import read_cookie_files

def create_app():
    app = FastAPI()                                                        api = Api(app)                                                         app.add_middleware(
        CORSMiddleware,
        allow_origin_regex=".*",                                               allow_credentials=True,                                                allow_methods=["*"],
        allow_headers=["*"],                                               )
    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 ImagesGenerateForm(BaseModel):
    model: Optional[str] = None                                            provider: Optional[str] = None
    prompt: str
    response_format: Optional[str] = None
    api_key: Optional[str] = None
    proxy: Optional[str] = None                                        
class AppConfig():
    ignored_providers: Optional[list[str]] = None
    g4f_api_key: Optional[str] = None
    ignore_cookie_files: bool = False
    defaults: dict = {}

    @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 = Client()
        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]
        


啥意思，说中文
Assistant: 这段代码是一个用Python编写的基于FastAPI的Web API应用程序。代码实现了一个API服务，可用于处理聊天和图像生成请求。主要组件包括请求授权、异常处理和几个不同的API端点。

主要功能包括：

1. **API密钥验证**：每当访问特定的端点（如`/v1/chat/completions`或`/v1/completions`）时，系统会验证请求中提供的API密钥是否有效。

2. **异常处理**：当请求数据不符合预期格式时，系统会捕捉 `RequestValidationError`，并返回错误信息。

3. **API端点**：
   - `/v1`和`/v1/models`：提供一些静态信息，比如支持的模型。
   - `/v1/models/{model_name}`：获取特定模型的信息。
   - `/v1/chat/completions`：用于生成聊天内容。
   - `/v1/images/generations`：用于生成图像。

4. **应用配置**：通过`AppConfig`类，可以设置和获取应用的配置项，比如忽略的提供商和默认设置。

如果有任何不明白的地方或者需要具体某个部分的解释，请随时告诉我！
User: 有没有供应商
Assistant: