The URL parameter with Chinese characters comes to the upstream proxy like this "????"

[dimansound]

Broken url parameter comes to upstream proxy when use UpStreamHttpProxy and Chinese characters in url params, for example any url with this params:

&systemCode=附件系统
or
&systemCode=%E9%99%84%E4%BB%B6%E7%B3%BB%E7%BB%9F

On the upstream proxy got &systemCode=????

BeforeRequest by default, hasn't code.
Without UpStreamHttpProxy works well done.
Titanium version 3.1.1450

[dimansound]

[honfika]

Do you change the url (or the query string ) in TWP?
I tried to repducuce the issue, but can't ... however I did not change anything in TWP
chrome => TWP => Fiddler => server works:

Browser:

Upstream Http proxy (Fiddler):

So please specify what did you do in your application.

[dimansound]

Do you change the url (or the query string ) in TWP?

I changed code url = Request.RequestUri.ToString() to url = Request.RequestUriString;
Request.RequestUri.ToString() got ?systemCode=附件系统
Request.RequestUriString got ?systemCode=%E9%99%84%E4%BB%B6%E7%B3%BB%E7%BB%9F
Otherwise, this is what happens:
In original code TWP v3.2 in HttpWebClient.cs used this method (condition when useUpstreamProxy = true)
url = Request.RequestUri.ToString();
So this method returned not urlencoded value of url http://.../?systemCode=附件系统
Next step in method headerBuilder.WriteRequestLine(Request.Method, url, Request.HttpVersion);

As a result, due to the fact that Request.RequestUri.ToString() returns an unencoded value, when encoding, the result is encoding.GetBytes(str) = "????", that is, instead of Chinese characters, since ISO-8859-1 is used, Chinese characters are encoded as the character "?"