Can not add Http Header

[zll123dxd]

I'm not sure if this project is still maintained, try asking.

I have configured a proxy with authentication in my android project.
There are two options to achieve

1. extends SimpleMiddleware, and add Proxy-Authorization in the onRequest function.
2. Call addHeader [Proxy-Authorization] in AsyncHttpRequest.
   Check the http message through tcpdump, it tries to connect to the target proxy, but it does not carry the [Proxy-Authorization] I added.

I don't know if I used it wrong, attach a piece of code:

    Headers header = new Headers();
    String baseAuth = Base64.encodeToString(("test:12345678").getBytes(), Base64.NO_WRAP);
    AsyncHttpRequest.setDefaultHeaders(header, Uri.parse(url));
    header.set("Proxy-Authorization", "Basic " + baseAuth);
    AsyncHttpGet request = new AsyncHttpGet(url);
    request.setHeader("Proxy-Authorization", "Basic " + baseAuth);
    view.setText(request.toString());
    mClient.executeString(request, mCallback);

If I configure this parameter in the okhttp framework, I can successfully connect. So I think there is nothing wrong with the parameters of the header.

I checked the code of the AsyncHttp framework, I think the default does not support Proxy-Auth, so I want to manually add the http header, but it is invalid, if anyone has a suitable solution, please help me.

[zll123dxd]

I tried to do some debugging, the header is correctly saved in the request, but when it is actually sent, there is only the host field, is this a bug?

[zll123dxd]

To add, I found this code to force the use of the Host field, and did not use other fields in the Request

AsyncSSLSocketMiddleware.java
...
String connect = String.format(Locale.ENGLISH, "CONNECT %s:%s HTTP/1.1\r\nHost: %s\r\n\r\n", uri.getHost(), port, uri.getHost());
data.request.logv("Proxying: " + connect);
Util.writeAll(socket, connect.getBytes(), new CompletedCallback() {
...

In other words, the header I added will be used after the proxy is forwarded, not when the proxy is connected. I think it does not support the proxy with authentication, right?