SocketException: Connection failed (OS Error: Permission denied, errno = 13) · Issue #32602

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void main() {
// add interceptors
dio.interceptors..add(CookieManager(CookieJar()))..add(LogInterceptor());
(dio.transformer as DefaultTransformer).jsonDecodeCallback = parseJson;
dio.options.receiveTimeout = 15000;
(dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate =
(client) {
client.findProxy = (uri) {
//proxy to my PC(charles)
return "PROXY xx.xx.xx.xx:8888";
runApp(MyApp());

flutter: DioError [DioErrorType.DEFAULT]: SocketException: Connection failed (OS Error: Permission denied, errno = 13), address = xx.xx.xx.xx, port = 8888
@shuyanzi

Are you facing this issue when trying to proxy the traffic on your mobile phone with Charles setup on your machine(Mac etc)?
yes,I want to see the package information on Charles
          If your AndroidManifest.xml is missing this line:
<uses-permission android:name="android.permission.INTERNET"/>
...then when we try to hook up the observatory port we will get an error 13 (permission denied).

We should catch this case and explain what to do about it.
Duplicate of #2138
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          @shuyanzi

I've reproduced this error by removing the  <uses-permission android:name="android.permission.INTERNET"/> section, just as @cakipaul  said.

When the android.permissions.INTERNET is specified in the AndroidManifest.xml, I've catched the flutter http traffic using Charles, as below:

I'm closing this issue now.

If you are still seeing this issue, comment below and I will reopen this issue.
          I am facing the same problem. Your solution does work for me. Below is the screenshot of my code base and the error log:

I am trying to display the user's display photo after loggin in with his/her google account. Pls help me.