基于FastAPI Swagger UI的文档链接/docs和/redoc在没有外网的状态下无法打开，原因是Swagger依赖的JS和CSS来自CDN。
https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui-bundle.js
https://cdn.jsdelivr.net/npm/swagger-ui-dist@5/swagger-ui.css
https://fastapi.tiangolo.com/img/favicon.png
https://cdn.jsdelivr.net/npm/redoc@next/bundles/redoc.standalone.js
FastAPI可以配置这些链接地址，改为本地目录下，自定义Javascript和CSS的CDN地址：
from fastapi import FastAPI
from fastapi.openapi.docs import (get_redoc_html,get_swagger_ui_html,get_swagger_ui_oauth2_redirect_html,
)app = FastAPI(docs_url=None, redoc_url=None)app.mount("/static", StaticFiles(directory="static"), name="static")@app.get("/docs", include_in_schema=False)
async def custom_swagger_ui_html():return get_swagger_ui_html(openapi_url=app.openapi_url,title=app.title + " - Swagger UI",oauth2_redirect_url=app.swagger_ui_oauth2_redirect_url,swagger_js_url="/static/swagger-ui/swagger-ui-bundle.js",swagger_css_url="/static/swagger-ui/swagger-ui.css",swagger_favicon_url="/static/swagger-ui/favicon.png",)@app.get(app.swagger_ui_oauth2_redirect_url, include_in_schema=False)
async def swagger_ui_redirect():return get_swagger_ui_oauth2_redirect_html()@app.get("/redoc", include_in_schema=False)
async def redoc_html():return get_redoc_html(openapi_url=app.openapi_url,title=app.title + " - ReDoc",redoc_js_url="/static/redoc/redoc.standalone.js",redoc_favicon_url="/static/redoc/favicon.png",with_google_fonts=False)
文件下载地址：
https://download.csdn.net/download/lilongsy/90355890
相关链接
https://fastapi.tiangolo.com/how-to/custom-docs-ui-assets/
