About request Host field and copy Cookie in reverseproxy.go #1886
Description
by BG5SBK:
I try to use "reverseproxy.go" to make a simple http proxy, but it's not work.
The "Director" function in "reverseproxy.go" not set request's Host
field as target URL's Host.
So, when target is a virtual host will not work.
Below code work well for me:
o := new(http.Request)
*o = *r
o.Host = targetURL.Host
o.URL.Scheme = targetURL.Scheme
o.URL.Host = targetURL.Host
o.URL.Path = singleJoiningSlash(targetURL.Path, o.URL.Path)
if q := o.URL.RawQuery; q != "" {
o.URL.RawPath = o.URL.Path + "?" + q
} else {
o.URL.RawPath = o.URL.Path
}
o.URL.RawQuery = targetURL.RawQuery
o.Proto = "HTTP/1.1"
o.ProtoMajor = 1
o.ProtoMinor = 1
o.Close = false
Just one line, the "o.Host = targetURL.Host" different with
"reverseproxy.go"
And the "ServeHTTP" function in "reverseproxy.go" the Cookie in
target response not copy to response.
Below code work well for me:
for _, c := range res.SetCookie {
w.Header().Add("Set-Cookie", c.Raw)
}
Without this code, some website can't login.
Below two attachements is the test code that try to proxy request to
"http://www.baidu.com";
The first attachment "main.go", when a request in, the server throw :
"proxy error: unexpected EOF".
And second attachment "main3.go", I copy out "reverseproxy.go" and
make some hack and then it work correctly.
Attachments: