- Flutter Web返回`DioError [DioError
- DioError (DioError [DioErrorType
- flutter 报错Bad state: Insecure HT
- flutter-DioError (DioError [DioE
- Flutter:报错Unhandled Exception: B
- Flutter: error:::DioError [DioEr
- Flutter 报错： Error: No address as
- Flutter采坑—ERROR:DioError
- Flutter dio请求DioError [DioErrorT
- DioError [DioErrorType.RESPONSE]
Flutter Web调用自己建的api,返回DioError [DioErrorType.RESPONSE]: XMLHttpRequest error.
原因是api需要设置Access-Control-Allow-Origin. 浏览器环境有跨域限制，服务器返回的输出头中必须有相应的设置才能在js中调用(flutterweb最终转换的代码是js)
代码:
from fastapi.responses import JSONResponse
from fastapi import FastAPI,Response
@app.get("/res")
def get_headers():
content = [ ' content' ]
headers = {"Access-Control-Allow-Origin": "*"}
return JSONResponse(content=content, headers=headers)
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